Trunk Bay
US Virgin Islands · United States Virgin Islands
One of the Caribbean's most photographed beaches, Trunk Bay on St. John harbors a 225-metre underwater snorkel trail managed by the National Park Service with labeled coral formations guiding divers through a living reef classroom. Elkhorn and staghorn coral patches shelter French angelfish and Spanish hogfish, while spotted eagle rays cruise the sandy lanes beyond the trail markers. The calm, clear shallows make this an exceptional site for new divers and underwater photographers chasing sharp macro shots in natural light.
Conditions
Depth
3 to 18 m
Good for beginners
Current
Usually still
Can pick up on the edge
Visibility
15 to 25 m
Clearest in the calm season
Water
25 to 30°C
skin or 1mm
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 25 | 25 | 25 | 26 | 27 | 28 | 28 | 28 | 28 | 27 | 26 | 25 |
| Vis (m) | 20 | 20 | 20 | 20 | 20 | 18 | 15 | 15 | 12 | 15 | 18 | 20 |
| Current | Still | Still | Still | Still | Still | Still | Still | Still | Still | Still | Still | Still |
Your chances of seeing each animal
Caribbean Land Hermit Crab
Last confirmed Jun 5, 2026 · 239 records
Almost always
Nearly every dive
Pearly-Eyed Thrasher
Last confirmed Jul 5, 2026 · 213 records
Almost always
Nearly every dive
Green Sea Turtle
Last confirmed Jun 24, 2026 · 147 records
Almost always
Nearly every dive
Crested Anole
Last confirmed Jun 26, 2026 · 116 records
Almost always
Nearly every dive
Atlantic Blue Tang
Last confirmed Jun 15, 2026 · 100 records
Almost always
Nearly every dive
French Angelfish
Last confirmed May 13, 2026 · 21 records
Very likely
Most dives
Spotted Eagle Ray
Last confirmed Jul 2, 2026 · 22 records
Very likely
Most dives
Queen Parrotfish
Last confirmed May 17, 2026 · 24 records
Very likely
Most dives
Gear