Best Time to Dive Ireland
Across 6 Ireland dive sites with multi-year conditions history, May historically shows the most favorable days — 52% of sampled days in the good band. The next-highest months are June (44%), July (41%) and August (33%). February historically shows the fewest favorable days (5% of sampled days). Average water temperature in the sample runs from about 9°C in March to 16°C in August. Typical seas range from 1.5 m to 3.3 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 Ireland?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 8% | 10°C | 3.1 m |
| Feb | 5% | 9°C | 3.0 m |
| Mar | 13% | 9°C | 2.4 m |
| Apr | 25% | 10°C | 1.9 m |
| May | 52% | 13°C | 1.5 m |
| Jun | 44% | 14°C | 1.6 m |
| Jul | 41% | 15°C | 1.5 m |
| Aug | 33% | 16°C | 1.9 m |
| Sep | 23% | 15°C | 2.1 m |
| Oct | 17% | 14°C | 2.4 m |
| Nov | 14% | 12°C | 2.6 m |
| Dec | 8% | 11°C | 3.3 m |
% = share of sampled days scoring in the favorable band, median across 6 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.
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