San Juan
Batangas · Philippines
San Juan in Batangas province is famous for its resident population of yellow-lipped sea kraits that gather at a unique feeding station on the reef, attracting divers who want to observe these elegant and mildly venomous snakes in their natural hunting behavior. The reef itself is a mixed landscape of sloping coral gardens, rubble patches, and sandy channels that support large moray eels, resident turtles, and a prolific assortment of reef fish. Night dives at San Juan are exceptional, with lionfish, octopus, and sleeping parrotfish easily observed along the reef margin.
Conditions
Depth
5 to 25 m
Open water and up
Current
Can be moderate
Can pick up on the edge
Visibility
6 to 12 m
Clearest in the calm season
Water
24 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 24 | 24 | 25 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 25 | 24 |
| Vis (m) | 10 | 12 | 15 | 15 | 12 | 8 | 6 | 6 | 8 | 10 | 12 | 10 |
| Current | Gentle | Gentle | Gentle | Still | Still | Moderate | Moderate | Moderate | Gentle | Gentle | Gentle | Gentle |
Your chances of seeing each animal
Yellow-Vented Bulbul
Last confirmed May 21, 2026 · 6 records
Sometimes
About 1 in 3 dives
Barred Rail
Last confirmed Feb 25, 2024 · 9 records
Sometimes
About 1 in 3 dives
Common Kingfisher
Last confirmed Dec 3, 2025 · 1 records
Rare
Now and then
Yellow-lipped Sea Krait
Expected
Known here, not yet in recent logs
Giant Moray Eel
Expected
Known here, not yet in recent logs
Green Sea Turtle
Expected
Known here, not yet in recent logs
Gear