Blue Hole Romblon
Romblon · Philippines
Romblon's Blue Hole is a vertical cave entrance near the town harbor that opens into a cathedral-like chamber of shimmering blue light, with tunnels connecting to the open sea at various depths. The sheltered interior walls are encrusted with colorful sponges and soft corals, and pygmy seahorses cling to the fan corals just inside the entrance arch. The cave system is suitable for Open Water divers in its shallower sections, while the deeper passages reward Advanced divers with dramatic swim-throughs and exceptional photographic compositions.
Conditions
Depth
3 to 28 m
Open water and up
Current
Usually gentle
Can pick up on the edge
Visibility
6 to 12 m
Clearest in the calm season
Water
25 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 25 | 25 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 25 |
| Vis (m) | 12 | 12 | 15 | 15 | 12 | 8 | 6 | 6 | 8 | 10 | 12 | 12 |
| Current | Still | Still | Still | Still | Still | Gentle | Gentle | Gentle | Still | Still | Still | Still |
Your chances of seeing each animal
Melibe colemani
Last confirmed May 3, 2026 · 59 records
Almost always
Nearly every dive
Weedy Pygmy Seahorse
Last confirmed May 3, 2026 · 34 records
Very likely
Most dives
Denise'S Pygmy Seahorse
Last confirmed May 4, 2026 · 28 records
Very likely
Most dives
Anna'S Chromodoris
Last confirmed Mar 20, 2026 · 35 records
Very likely
Most dives
Phyllodesmium koehleri
Last confirmed May 16, 2026 · 32 records
Very likely
Most dives
Bargibant's Pygmy Seahorse
Last confirmed May 2, 2026 · 3 records
Likely
About 6 in 10 dives
Hairy Frogfish
Last confirmed Apr 24, 2025 · 3 records
Likely
About 6 in 10 dives
Orbicular Batfish
Expected
Known here, not yet in recent logs
Gear