Best Time to Dive Yap
Across 4 Yap dive sites with multi-year conditions history, June historically shows the most favorable days — 92% of sampled days in the good band. The next-highest months are July (82%), May (80%) and August (77%). February historically shows the fewest favorable days (1% of sampled days). Average water temperature in the sample runs from about 29°C in February to 30°C in August. Typical seas range from 1.0 m to 2.2 m of significant wave height through the year. These figures are historical climatology computed from measured conditions — patterns, not a forecast or a guarantee.
Computed from our own conditions climatology — measured history, not brochure copy.
Which months are historically most favorable in Yap?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 12% | 29°C | 2.2 m |
| Feb | 1% | 29°C | 2.2 m |
| Mar | 28% | 29°C | 1.7 m |
| Apr | 62% | 29°C | 1.4 m |
| May | 80% | 30°C | 1.3 m |
| Jun | 92% | 30°C | 1.0 m |
| Jul | 82% | 30°C | 1.2 m |
| Aug | 77% | 30°C | 1.1 m |
| Sep | 70% | 30°C | 1.3 m |
| Oct | 74% | 30°C | 1.4 m |
| Nov | 40% | 30°C | 1.6 m |
| Dec | 22% | 30°C | 1.8 m |
% = share of sampled days scoring in the favorable band, median across 4 dive 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 Micronesia & western Pacific region — not site-specific promises.
- Whale sharkDec–Jan
- Scalloped hammerheadFeb–Mar
- Humpback whaleJul–Oct
- Reef manta rayJun–Sep
- Tiger sharkyear-round
- Bull sharkyear-round
- Green sea turtleyear-round
Bars are Jan–Dec — months when sightings historically concentrate (GBIF occurrence records). Wildlife is never guaranteed.
Diving Yap soon? Browse its dive sites with auto-updating 7-day condition windows — free, no account needed.
Choosing between destinations? Compare them month by month with the Trip PlannerPro