Philippines
Best overall months to dive: Mar–May
The Philippines covers thresher sharks at Malapascua, macro at Anilao and Dauin, Moalboal's resident sardine baitball, and Panglao and Balicasag's walls and jack schools. Coron holds Japanese WWII wrecks; Subic Bay adds lower-visibility wreck diving inside an active industrial port, with permits and technical limits that matter. Romblon is a specialist macro trip for rare sea slugs, not a reliable checklist. Donsol and Sogod Bay offer wild, non-provisioned whale sharks, unlike the fed encounters at Oslob. Apo Reef and Tubbataha are the two big offshore reefs, with Tubbataha liveaboard-only from roughly mid-March to mid-June. Something is diveable most months, though March to May is the broad dry-season core and typhoon risk is highest from roughly August to December.
Dive regions
Anilao, Batangas
$–$$ · Land based, Shore dive, Day trip
Best: Jan, Feb, Mar, Apr, May, Nov, Dec
Apo Reef Natural Park
$–$$ · Liveaboard, Land based, Day trip
Best: Mar–May
Coron, Palawan
$ · Land based, Day trip, Liveaboard
Best: Mar–May
Dauin
$–$$ · Land based, Shore dive, Day trip
Best: Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Donsol & Ticao Pass
$ · Land based, Day trip
Best: Feb–Apr
Malapascua
$ · Land based, Day trip
Best: Mar–May
Moalboal
$ · Shore dive, Land based, Day trip
Best: Jan, Feb, Mar, Apr, May, Nov, Dec
Panglao & Balicasag (Bohol)
$–$$ · Land based, Day trip, Shore dive
Best: Jan–May
Puerto Galera
$ · Land based, Day trip, Shore dive
Best: Jan, Feb, Mar, Apr, May, Nov, Dec
Romblon
$–$$ · Land based, Day trip, Shore dive
Best: Feb–Apr
Sogod Bay
$ · Land based, Day trip, Shore dive
Best: Jan–Apr
Subic Bay
$–$$ · Land based, Day trip
Best: Jan, Feb, Mar, Apr, May, Nov, Dec
Tubbataha Reefs Natural Park
$–$$$ · Liveaboard
Best: Apr–May