Conditions referenceSeason, water and visibilityBest Feb–Apr · Mild current · 26–31°C (coldest Jan, warmest May)
- Current
- Mild
- Water temperature
- 26–31°C (coldest Jan, warmest May)
- Visibility
- 10–30m: Operators report roughly 10–30m.
- Experience
- Many shallow macro and sanctuary sites suit Open Water divers with good buoyancy.
01 · Marine life
What you may see
Sightings are never guaranteed. The bars show typical likelihood by month.
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Nudibranchs and sacoglossan sea slugs are the core draw.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Documented in conservation work in the passage and possible on reef dives.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Several pygmy-seahorse species are reported on gorgonians and other host habitat.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Documented in Romblon Passage conservation work and reported at sanctuary reefs.
02 · Dive sites
Dive sites worth knowing
A starting point, not a ranking. Conditions decide what works on the day.
Agpanabat Caves and Canyons
The route includes overhead-like swim-throughs and should be matched to training, buoyancy and local conditions.
8–25m · Moderate current
Logbon Coral Canyon
A wider-angle alternative to Romblon's muck sites.
3–40m · Moderate current
Lonos Marine Sanctuary
A sheltered local reef used for easier dives and macro searches.
4–24m · Mild current
See all 6 dive sites
03 · LogisticsGetting there and costsModerate. Fly to CRK. Typical trip $–$$.
Route overview
Moderate
Reachable but with some friction: 1 domestic flight, a 3h overland transfer.
Airport options
CRK
Clark International Airport
Twice-weekly domestic flight to Tugdan Airport on Tablas, followed by road to San Agustin and a local ferry to Romblon Island
TBH
Tugdan Airport
Arrival airport on Tablas; road transfer serves Tablas operators, while Romblon Island requires onward travel to San Agustin and a ferry
Typical trip cost
$–$$
under $2,000 to $2,000–4,000
Per person, excluding international flights.
- Published 2025/26 Romblon Island rates list rooms at PHP 2,890–4,490 per night, meals at PHP 1,950 per day, single dives at PHP 2,000 and a two-dive day at PHP 4,000.
- A Blue Hole trip adds PHP 4,000 per boat plus a PHP 400 per-diver entrance fee.
- A week with 10 dives normally stays below $2,000 before flights; private guides, single occupancy and extra transfers can move it into the $2,000–4,000 tier.