Grande Island, Philippines

Where History Meets the Shores of Subic Bay

Grande Island photo by PH2 R. MANARY, Public domain, via Wikimedia Commons

Grande Island, Philippines is a destination where history and leisure meet. Once a vital U.S. naval base defense site, the island played a key role during World War II with its network of coastal gun batteries and fortifications designed to protect the entrance to Subic Bay. The US Navy established significant military operations here, further enhancing its strategic importance.

Covering an area of about 1/2 square mile, Grande Island's location at the entrance of Subic Bay made it a critical point for military and logistical operations. Today, the same island that once stood guard against naval forces has been transformed into a tourist getaway, offering a mix of historical intrigue and tropical charm.

Situated at the mouth of Subic Bay and just a short boat ride from the Subic Bay Freeport Zone, Grande Island is both easily accessible and strategically located. Its position once made it a cornerstone of defense in the Pacific, but now it serves as a scenic retreat for travelers seeking relaxation, water sports, and a glimpse into the Philippines’ wartime past.

What makes Grande Island truly unique is its dual identity. On one side, it’s a living historical site—home to remnants of Fort Wint, Battery Warwick, Battery Hall, and Battery Flake, structures that once mounted powerful coastal guns. Before the US Navy era, the island featured original Spanish fortifications and naval stations, highlighting its long-standing military significance in the area.

On the other, it’s home to the Grande Island Resort, where families can enjoy beachfront cottages, water activities, and wreck diving adventures in Subic Bay. For history buffs, divers, and leisure travelers alike, Grande Island offers the rare chance to step into the past while enjoying the comforts of the present.

Geography & Location

Grande Island’s unique geography made it one of the most strategically important sites in the Philippines during its time as a U.S. naval stronghold. Today, that same location gives visitors sweeping views of Subic Bay and convenient access to historical and leisure attractions.

Located at the Entrance of Subic Bay 

• Grande Island sits at the mouth of Subic Bay, guarding its narrow entrance. To its east is Bataan, while directly across lies Cubi Point, another historic U.S. Navy site. This positioning allowed the island to serve as a natural checkpoint for any vessels entering the bay.

Part of the Subic Bay Metropolitan Authority (SBMA) 

• Following the departure of the U.S. Navy in the early 1990s, Grande Island was integrated into the Subic Bay Freeport Zone, overseen by the Subic Bay Metropolitan Authority (SBMA). This has allowed the island to evolve from a purely military facility into a mix of resort development and heritage tourism.

  
  

Connection to Other Historic Sites 

• Grande Island is often linked to nearby Corregidor Island in Manila Bay, both of which were considered vital defensive outposts during WWII. Together, they formed part of a broader network of coastal forts protecting key naval bases in the Philippines.

A Natural Defensive Point 

• Chosen by the U.S. Navy for its strategic position, Grande Island was fortified with powerful coastal artillery, including Battery Warwick, Battery Hall, and Battery Flake. Its geography—elevated terrain at the bay’s entrance—made it a natural fortress against enemy ships and submarines.

  
  

In short, Grande Island’s location was not accidental. It was carefully selected as both a naval shield for Subic Bay and a crucial piece of the U.S. military’s Pacific defense network—roles that have left a lasting imprint on the island’s identity.

Buffington-Crozier carriage details of 6-inch disappearing gun at Fort Wint, Subic Bay. . Photo by Thewellman, Public domain, via Wikimedia Commons

Historical Background

Grande Island is steeped in military history, its identity shaped by decades of service as a coastal defense outpost in Subic Bay.

Construction of Fort Wint 

• In the early 1900s, the United States Army Coast Artillery Corps constructed Fort Wint on Grande Island as part of the harbor defenses of Manila and Subic Bays. Completed in the first decades of the 20th century, it was designed to guard the entrance of Subic Bay Naval Base—a critical U.S. military facility in the Philippines.

Coastal Gun Batteries 

• To fortify the island, several gun batteries were installed, including:

  
  

  • Battery Warwick – a large battery armed with disappearing guns.

  • Battery Hall – mounted with coastal artillery to deter incoming naval threats.

  • Battery Flake – equipped with smaller but strategically placed guns. Collectively, these batteries created a formidable line of defense against enemy warships attempting to enter the bay.

    
    

From Washington State to the Philippines 

• Interestingly, some of the guns used in Fort Wint were originally installed at Fort Casey in Washington State (USA). These massive coastal guns were later dismantled, shipped, and reinstalled on Grande Island, illustrating the island’s importance in the U.S. Pacific defense network.

  
  

Role During World War II 

• During World War II, Fort Wint and its batteries played a crucial role:

  
  

  • The island came under attack from Japan's advancing forces during their campaign in the Philippines. As the Japanese offensive intensified, military personnel were ordered to abandon their positions, leading to the mass surrender of troops on the island.

  • Submarines and surface ships clashed in nearby waters as control of Subic Bay became vital.

  • Grande Island’s defenses helped protect the naval repair facilities and anchorages inside Subic Bay, though eventually the island, like much of Luzon, fell under Japanese control.

    
    

Timeline of Grande Island’s Defenses

• Built & Completed: Early 1900s, as part of U.S. harbor defenses.

• Guns Moved: Heavy artillery relocated from U.S. coastal forts like Fort Casey.

• Dismantled & Replaced: After WWII, many batteries were dismantled or abandoned as military strategy shifted from fixed coastal guns to naval and air power.

• Restored & Preserved: Some remnants remain visible today, though many structures were left to nature.

  
  

Today, the crumbling ruins of Fort Wint—from its concrete emplacements to its rusted guns—stand as reminders of Grande Island’s once-critical role in defending Subic Bay and the Philippines during a turbulent chapter in history.

Grande Island After WWII

The story of Grande Island didn’t end with the battles of the Second World War. After the war, significant repairs were made to the island’s fortifications and infrastructure, both to restore damage from natural events and to prepare the site for its new role as a civilian resort. Its role and identity shifted dramatically in the decades that followed, marking its transition from a vital military outpost to a historical tourism site and resort destination.

As a result, Grande Island stands today as a successful heritage and tourism site, preserving its military history while welcoming visitors.

Transition After the U.S. Navy Left Subic Bay 

• After WWII, the island remained part of the U.S. Naval Base Subic Bay, serving as a defensive site until fixed coastal artillery became obsolete. With the evolution of modern naval and air power, the massive guns of Fort Wint and its batteries were eventually abandoned. When the U.S. Navy officially withdrew from Subic Bay in 1992, control of Grande Island was turned over to the Philippine government.

Part of the Subic Bay Freeport Zone 

• Following the U.S. departure, Grande Island was incorporated into the Subic Bay Freeport Zone, managed by the Subic Bay Metropolitan Authority (SBMA). This move repurposed the island for civilian use, shifting focus from defense to economic development, tourism, and heritage preservation.

Remains of Military Structures 

• Today, much of Grande Island’s past can still be seen in the form of ruined fortifications, tunnels, and gun emplacements like Battery Warwick, Battery Hall, and Battery Flake. Though many of the weapons were dismantled and removed, the skeletal remains of Fort Wint endure as stark reminders of its wartime importance.

A Heritage & Tourism Site 

• Grande Island is often compared to Corregidor Island in Manila Bay, as both served as coastal defense outposts for U.S. forces in the Philippines. While Corregidor is larger and better known, Grande Island holds its own as a heritage site with both historical and recreational value. Visitors can walk among its relics of war while also enjoying a resort-style experience at Grande Island Resort—something that blends history with leisure in a way that few destinations can.

In this transformation, Grande Island has become more than just a relic of military history—it’s now a living museum and family retreat, offering insight into the past while serving the needs of present-day travelers.

Grande Island photo by Ojie Paloma/Flickr

Grande Island Resort Today

After its military past, Grande Island has reinvented itself as a unique combination of heritage and leisure, thanks to the development of Grande Island Resort. Today, it serves as a peaceful getaway for families, groups, and history buffs, offering both comfort and a touch of wartime nostalgia. Visitors can also view historical pictures of the island and its transformation at the resort or in informational displays.

Family-Friendly Accommodations 

• The resort provides a range of cottages, villas, and beachfront accommodations designed for relaxation. These spaces are simple yet comfortable, giving visitors the chance to unwind while surrounded by nature and remnants of the island’s history. Families and groups often enjoy the wide-open grounds, scenic views, and beachfront cottages that open directly to the sea.

Activities to Enjoy 

• Grande Island Resort is not just about relaxation; it’s also an activity hub:

  • Swimming, Snorkeling & Kayaking: Calm waters around the island make it perfect for safe family activities.

  • Scuba Diving in Subic Bay: Known worldwide, Subic Bay is home to numerous WWII shipwrecks—from Japanese cargo vessels to warships—making it one of the Philippines’ top wreck diving destinations. Grande Island provides an excellent base for divers exploring these sites.

  • Eco-Adventures & Historic Tours: Guests can join guided walks through Fort Wint’s batteries, tunnels, and ruins, offering an immersive connection to the island’s past. Nature lovers can also explore the island’s coastal trails and bird-watching areas.

    
    

Accessibility 

• Getting to the resort is simple and part of the experience. Visitors board a 15–20 minute boat transfer from the Subic Bay Freeport Zone ferry terminal, which is easily accessible from Manila (a 2–3 hour drive). The boat ride itself offers panoramic views of Subic Bay before arriving at the island’s pier.

  
  

Grande Island Resort gives travelers the best of both worlds: the serenity of a beachside escape and the intrigue of exploring historic military ruins. It’s a rare place where families can swim and relax while history enthusiasts step back in time among the old gun emplacements of Fort Wint.

Things to Do on Grande Island

Grande Island offers a mix of relaxation, history, and adventure, making it a versatile destination for different kinds of travelers. Here are the top experiences to enjoy during your visit:

Relax on the Beaches 

• The island’s shoreline features calm waters that are perfect for swimming, snorkeling, or simply lounging with family and friends. It’s a quieter alternative to Subic’s mainland beaches, with fewer crowds and a more laid-back vibe.

Tour WWII Fortifications 

• History buffs will enjoy exploring the remnants of Fort Wint, including Battery Warwick, Battery Hall, and Battery Flake. These gun placements and crumbling fortifications offer a fascinating look into the island’s military past and its role in defending Subic Bay during WWII.

  
  

Go Diving in Subic Bay 

• Grande Island serves as a convenient jump-off point for divers looking to explore Subic Bay’s famous wrecks. The bay is home to numerous Japanese ships and submarines sunk during WWII, making it one of the top wreck diving destinations in the Philippines.

Photography & History Walks 

• The island is filled with photogenic spots, from rusted gun mounts and old tunnels to scenic cliffs overlooking the bay. Guided history walks allow visitors to connect with the past while discovering restored ruins and old images that bring Fort Wint’s story to life. Many of the historical photographs and information displayed during these walks are provided by local historians and archives to ensure accurate representation of the site's heritage.

  
  

Sunset Viewing 

• Grande Island is perfectly positioned for breathtaking sunset views over Subic Bay, with Bataan’s mountains forming a dramatic backdrop. It’s an ideal way to end the day, whether you’re a history enthusiast or simply soaking in the island’s natural beauty.

Grande Island photo by Ojie Paloma/Flickr

Accessibility & How to Get There

Reaching Grande Island, Philippines is fairly straightforward, making it a convenient escape for those based in or visiting Manila. Here’s how to get there:

From Manila to Subic Bay (2–3 Hours) 

• Grande Island is located just off the coast of Subic Bay in Zambales. From Manila, you can travel by private car, van, or public bus via the North Luzon Expressway (NLEX) and Subic-Clark-Tarlac Expressway (SCTEX). The journey typically takes 2–3 hours, depending on traffic. Buses bound for Olongapo or Subic Bay also operate regularly from Cubao and Pasay terminals.

Boat Transfers from Subic Bay Freeport Zone (15–20 Minutes) 

• Once in Subic Bay, you’ll board a 15–20-minute boat ride at the Grande Island Ferry Terminal, located within the Subic Bay Freeport Zone. The short crossing offers scenic views of Subic Bay, with Bataan’s mountain range in the background.

Resort Package Transfers 

• For those staying at Grande Island Resort, boat transfers are usually included in resort packages, making logistics seamless. Guests simply check in at the ferry terminal, and staff coordinate the trip to the island. For day trips or independent tours, visitors can also arrange transfers through accredited operators within Subic.

Travel Tip: Since all access to Grande Island requires a boat ride, it’s best to arrive early in Subic Bay to avoid delays and to maximize your time on the island.

Best Time to Visit

Grande Island can be visited year-round, but the season and timing can make a big difference to your experience—whether you’re after beach relaxation, diving adventures, or historical immersion.

Dry Season (November–May) 

• This is the best time to visit Grande Island. Expect sunny skies, calm seas, and ideal weather for swimming, snorkeling, kayaking, and wreck diving in Subic Bay. It’s also the perfect season for exploring the ruins of Fort Wint and walking through its old batteries without worrying about rain.

Wet Season (June–October) 

• The island remains open during the rainy season, but frequent showers and rougher seas are common. The upside is a quieter atmosphere with fewer tourists, making it appealing to travelers who don’t mind occasional rain. Activities may be limited, though indoor or guided historical tours can still be enjoyed.

  
  

WWII Commemorations (March, June, November) 

• Grande Island is not only a leisure destination but also a heritage site. Visiting in March, June, or November coincides with events and commemorations tied to WWII history in the Philippines. These months often see special historical tours, memorial activities, and educational programs, providing a deeper appreciation of the island’s past.

Travel Tip: If you’re planning a resort stay or diving trip, book during the dry season for the best conditions. But if your focus is more on history and heritage, timing your visit with a commemoration event can make the trip even more meaningful.

Travel Tips

Visiting Grande Island is a rewarding experience, but a little preparation will ensure you enjoy both its natural beauty and historical heritage responsibly. Here are some essential tips to keep in mind:

• Bring Cash for Small Expenses 

  While Grande Island Resort and some establishments in the Subic Bay Freeport Zone accept credit or debit cards, it’s always best to carry cash in pesos. Small shops, local guides, or incidental purchases often operate on a cash-only basis.

  
  

• Wear Comfortable Shoes 

  Exploring Fort Wint’s ruins, tunnels, and old gun batteries involves walking over uneven paths, grassy trails, and sometimes rocky areas. Wearing sturdy, comfortable shoes will make your visit safer and more enjoyable.

  
  

• Pack Reef-Safe Sunscreen and Eco-Friendly Gear 

  Protect both yourself and the environment by using reef-safe sunscreen and bringing eco-friendly essentials like reusable water bottles and bags. The waters around Subic Bay are home to diverse marine life and minimizing chemical and plastic pollution helps preserve the ecosystem.

  
  

• Respect and Preserve Heritage Sites 

  Many of the island’s historic structures, like Battery Warwick, Battery Hall, and Battery Flake, are fragile after decades of exposure. Avoid climbing on ruins, touching old mounts, or leaving graffiti. Treat the site as an open-air museum, helping to preserve it for future generations.

  
  

By following these simple but important guidelines, you’ll not only make your visit smooth but also contribute to the protection of Grande Island’s cultural and natural treasures.

Muzzle of a splinter-damaged 6-inch disappearing gun at Fort Wint, Subic Bay. Photo by Thewellman, Public domain, via Wikimedia Commons

Frequently Asked Questions (FAQ)

Is Grande Island open to the public? 

Yes. Grande Island is open to the public through Grande Island Resort, which manages access to the island. Day tours and overnight stays are available, but all visitors must arrange entry either through resort bookings or accredited tour operators, as the island is privately managed within the Subic Bay Freeport Zone.

How do I book Grande Island Resort? 

Reservations can typically be made via the resort’s official booking channels or through travel agencies offering Subic Bay packages. Bookings usually include round-trip boat transfers, accommodations (for overnight guests), and access to resort amenities.

Can I tour the historic batteries without staying at the resort? 

Yes, guided tours of the historic sites—including Battery Warwick, Battery Hall, and Battery Flake—can often be arranged as part of a day trip package. However, it’s recommended to confirm with the resort or operators beforehand, since access to certain areas may be restricted to guests for safety and preservation reasons.

What diving opportunities are available near Grande Island? 

Grande Island is a convenient base for exploring Subic Bay’s world-famous wreck diving sites. These include Japanese cargo ships, submarines, and other WWII-era vessels. Diving operators based in Subic Bay offer guided trips for certified divers, and some also provide beginner-friendly introductory dives.

How does Grande Island compare to Corregidor? 

Both Grande Island and Corregidor share a WWII heritage as coastal defense outposts. Corregidor, located at the mouth of Manila Bay, is larger, more extensively preserved, and internationally recognized as a historical battlefield memorial. Grande Island, by contrast, is smaller and less developed historically, but it offers a unique combination of military ruins and a functioning beach resort, making it both a heritage site and a leisure destination.

Takeaway

Grande Island, Philippines is more than just a weekend getaway—it’s a place where history and leisure come together. Once a vital outpost of the U.S. Navy, home to Fort Wint and its coastal gun batteries, the island has transformed into a welcoming retreat under the Subic Bay Freeport Zone. Visitors today can enjoy both the tranquility of its beaches and resorts and the powerful stories still etched into its ruins.

For families, it’s a convenient escape where kids can swim, kayak, and explore safely. For history buffs, the island’s remnants—Battery Warwick, Battery Hall, Battery Flake, and the tunnels of Fort Wint—offer a tangible link to World War II and the defenses of Subic Bay. And for divers, Grande Island remains an excellent base for exploring Subic’s wreck diving sites, some of the most historically significant in Asia.

Yet with its dual identity comes responsibility. The heritage of Fort Wint and the natural beauty of Subic Bay deserve protection. Visitors are encouraged to travel responsibly respecting fragile ruins, supporting eco-friendly practices, and appreciating both history and nature with care.

Grande Island is not just another stop in Subic; it is a living reminder of the past, shaped into an experience for the present. By visiting mindfully, travelers help ensure its story continues—where the guns of history stand beside the calm waters of today’s resort life.

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