Best Time to Dive Las Grutas / Golfo San Matías
Across 1 Las Grutas / Golfo San Matías dive site with multi-year conditions history, May historically shows the most favorable days — 95% of sampled days in the good band. January historically shows the fewest favorable days (75% of sampled days). Average water temperature in the sample runs from about 11°C in August to 21°C in February. Typical seas range from 0.7 m to 0.9 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.
Month by month
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 75% | 20°C | 0.8 m |
| Feb | 88% | 21°C | 0.8 m |
| Mar | 84% | 19°C | 0.8 m |
| Apr | 89% | 16°C | 0.8 m |
| May | 95% | 14°C | 0.7 m |
| Jun | 83% | 13°C | 0.9 m |
| Jul | 90% | 12°C | 0.7 m |
| Aug | 80% | 11°C | 0.9 m |
| Sep | 80% | 11°C | 0.7 m |
| Oct | 86% | 13°C | 0.7 m |
| Nov | 78% | 15°C | 0.8 m |
| Dec | 81% | 18°C | 0.8 m |
% = share of sampled days scoring in the favorable band, median across 1 dive site 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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