Best Time to Dive U.S. Virgin Islands - St. Croix
Across 4 U.S. Virgin Islands - St. Croix dive sites with multi-year conditions history, September historically shows the most favorable days — 87% of sampled days in the good band.
Computed from our own conditions climatology — measured history, not brochure copy. Historical patterns, never a forecast or a guarantee.
Month by month
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 32% | 27°C | 1.6 m |
| Feb | 32% | 27°C | 1.6 m |
| Mar | 64% | 27°C | 1.4 m |
| Apr | 61% | 27°C | 1.4 m |
| May | 78% | 28°C | 1.2 m |
| Jun | 46% | 29°C | 1.4 m |
| Jul | 39% | 29°C | 1.5 m |
| Aug | 56% | 30°C | 1.4 m |
| Sep | 87% | 30°C | 1.1 m |
| Oct | 74% | 30°C | 1.2 m |
| Nov | 59% | 29°C | 1.4 m |
| Dec | 43% | 28°C | 1.5 m |
% = share of sampled days scoring in the favorable band, median across 4 sites with at least two years of history. Ringed = historical peak.
How does this compare worldwide? The Most Reliable Diving Months on Earth ranks 61 countries by the same measure.
Marine life seasons
Sighting patterns across the wider Caribbean & Bahamas region — not site-specific promises.
- Giant oceanic manta rayOctober
- OrcaJanuary
- Green sea turtleMar–May
- Bull sharkFebruary
- Humpback whaleAug–Sep
Bars are Jan–Dec — months when sightings historically concentrate (GBIF occurrence records). Wildlife is never guaranteed.
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