Best Time to Dive Ishigaki
Across 3 Ishigaki dive sites with multi-year conditions history, August historically shows the most favorable days — 83% 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 | 23% | 24°C | 2.3 m |
| Feb | 29% | 23°C | 2.2 m |
| Mar | 44% | 24°C | 1.8 m |
| Apr | 59% | 25°C | 1.3 m |
| May | 67% | 27°C | 1.3 m |
| Jun | 74% | 28°C | 1.0 m |
| Jul | 70% | 30°C | 1.2 m |
| Aug | 83% | 30°C | 1.1 m |
| Sep | 78% | 30°C | 1.1 m |
| Oct | 41% | 29°C | 1.9 m |
| Nov | 23% | 27°C | 2.3 m |
| Dec | 19% | 25°C | 2.4 m |
% = share of sampled days scoring in the favorable band, median across 3 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 Japan & East Asia region — not site-specific promises.
- Green sea turtleApr–Jun
Bars are Jan–Dec — months when sightings historically concentrate (GBIF occurrence records). Wildlife is never guaranteed.
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