Reefwander

Coral Triangle · Philippines

Subic Bay

US and Japanese war wrecks 15 minutes by boat from the dive centres

Subic Bay, a former US naval base 2–4 hours by road northwest of Manila, holds one of the Philippines' densest wreck fleets, most of it sunk in the Spanish–American War of 1898 or in World War II. Most named wrecks lie in 4–36 m — the USS New York at 16–32 m, the El Capitan at 4–22 m — and boat rides from the Freeport Zone and Barrio Barretto dive centres take about 15 minutes. More than ten full-time operators run daily trips, with technical wrecks to 72 m for trimix divers.

About diving in Subic Bay

Diving here runs on short hops. More than ten full-time operators work out of the Freeport Zone waterfront and the Barrio Barretto strip, and unlike Coron, where wrecks are hours away, most Subic sites are about 15 minutes by boat from the centres, so two or three wreck dives before mid-afternoon is routine. Camayan, on the far side of the Freeport, runs reef and night dives straight off its beach. Foreign nationals pay a small SBMA gate fee to enter the zone by road, night dives need prior coordination with the SBMA, and the USS New York needs advance Harbor Patrol clearance because it sits in an active shipping lane.

The bay is protected and rarely rough, with mild current on most sites, but it is bay water: visibility runs 5–30 m depending on site and season, worst near the river outflows and best on the outer wrecks from February to May. The hulls carry the life. Schooling sweetlips pack wreck interiors, sometimes in the hundreds, groupers exceeding a meter hold territorial sections, bluespotted stingrays rest on the sand between structures, and coconut octopus occupy the crevices. San Quentin alone has over 20 recorded nudibranch species under a growth of soft corals, sponges and crinoids.

It suits wreck divers of every grade. Open Water divers get the El Capitan's cargo holds at 4–22 m; Advanced divers get the USS New York and the LST with its barracuda and jack schools; trimix divers get the Kyo Maru (69 m), Banshu Maru (54 m) and the largely intact AJ-2 Savage bomber at 72 m, with PSAI and TecRec technical training run locally. The Oryoku Maru, a war grave where hundreds of Allied prisoners died, is listed by some operators and described as permanently closed by another source — ask before planning on it. Divers after clear water, reef colour or reliable big animals will find the bay limited; sharks and large pelagics are uncommon inside it.

Best time to dive Subic Bay

Subic Bay season rating, sea surface temperature, daytime high and rainfall by month, 2011–2025 averages
JanFebMarAprMayJunJulAugSepOctNovDec
SeasonPrimePrimePrimePrimePrimeGoodFairFairFairGoodPrimePrime
Sea surface28°C82°F27°C81°F28°C82°F29°C84°F30°C86°F30°C86°F30°C86°F29°C84°F29°C84°F29°C84°F29°C84°F28°C82°F
Daytime high31°C88°F32°C90°F34°C93°F35°C95°F35°C95°F32°C90°F31°C88°F30°C86°F31°C88°F31°C88°F31°C88°F31°C88°F
Rain25 mm1.0 in19 mm0.7 in29 mm1.1 in49 mm1.9 in159 mm6.3 in452 mm17.8 in608 mm23.9 in616 mm24.3 in494 mm19.4 in279 mm11.0 in104 mm4.1 in78 mm3.1 in
Subic Bay season rating, sea surface temperature, daytime high and rainfall by month, January to June, 2011–2025 averages
JanFebMarAprMayJun
PrimePrimePrimePrimePrimeGood
Sea surface
28°C82°F27°C81°F28°C82°F29°C84°F30°C86°F30°C86°F
Daytime high
31°C88°F32°C90°F34°C93°F35°C95°F35°C95°F32°C90°F
Rain
25 mm1.0 in19 mm0.7 in29 mm1.1 in49 mm1.9 in159 mm6.3 in452 mm17.8 in
Subic Bay season rating, sea surface temperature, daytime high and rainfall by month, July to December, 2011–2025 averages
JulAugSepOctNovDec
FairFairFairGoodPrimePrime
Sea surface
30°C86°F29°C84°F29°C84°F29°C84°F29°C84°F28°C82°F
Daytime high
31°C88°F30°C86°F31°C88°F31°C88°F31°C88°F31°C88°F
Rain
608 mm23.9 in616 mm24.3 in494 mm19.4 in279 mm11.0 in104 mm4.1 in78 mm3.1 in

2011–2025 averages. Sea surface: NOAA Coral Reef Watch, measured at the surface, so deeper water can run colder. Daytime high and rain: NASA POWER.

November–May dry season is clearest, best February–May; the July–September monsoon cuts inner-bay visibility and cancels rough days.

Best months: January, February, March, April, May, November, December

Subic Bay water temperature and weather by month

The sea surface runs from 27 °C (81 °F) in February to 30 °C (86 °F) in June. Most rain falls from June to October, peaking at about 620 mm (24 in) in August; it stays largely dry from November to April. Daytime highs reach 35 °C (95 °F) in April and drop to 30 °C (86 °F) in August. The coldest water here is about 27 °C (81 °F), so pack a 3 mm, or even a 2 mm, suit.

Dive types & marine life

The wrecks are the habitat: eagle rays pass the USS New York, LST and El Capitan, blacktip reef sharks work the outside of Grande Island, and bull shark sightings at the deeper wrecks are increasingly reported, though one guide notes sharks stay uncommon inside the bay itself. Macro is dependable — harlequin ghost pipefish, coconut octopus, and 20-plus nudibranch species at San Quentin.

  • Wreck
  • Reef
  • Night
  • Eagle rays
  • Reef sharks
  • Barracuda
  • Trevally & jacks
  • Groupers
  • Reef fish swarms
  • Stingrays
  • Nudibranchs
  • Octopus & cuttlefish
  • Macro critters

Best dive sites in Subic Bay

A trimix wreck at 69 m, dived in blue water

to 69 madvanced

How to get to Subic Bay

Subic Bay is 100–120 km northwest of Manila, 2–4 hours by road; Victory Liner buses run hourly from Manila terminals to Olongapo. Clark International Airport is a 1–1.5 hour transfer. Dive centres line the Freeport Zone waterfront and the Barrio Barretto beach strip; foreign nationals pay a small SBMA gate fee at the zone entrance.

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