Best Time to Dive Ireland
Across 8 Ireland dive sites with multi-year conditions history, May historically shows the most favorable days — 72% 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 | 20% | 9°C | 2.6 m |
| Feb | 11% | 9°C | 2.5 m |
| Mar | 21% | 9°C | 2.1 m |
| Apr | 37% | 10°C | 1.6 m |
| May | 72% | 13°C | 1.2 m |
| Jun | 62% | 14°C | 1.3 m |
| Jul | 52% | 15°C | 1.3 m |
| Aug | 44% | 16°C | 1.6 m |
| Sep | 42% | 15°C | 1.8 m |
| Oct | 26% | 14°C | 2.1 m |
| Nov | 26% | 12°C | 2.2 m |
| Dec | 14% | 10°C | 2.7 m |
% = share of sampled days scoring in the favorable band, median across 8 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.
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