Best Time to Dive South Dakota
Across 2 South Dakota dive sites with multi-year conditions history, August historically shows the most favorable days — 100% of sampled days in the good band. The next-highest months are July (98%), September (96%) and June (94%). December historically shows the fewest favorable days (71% of sampled days). 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 South Dakota?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 84% | — | — |
| Feb | 81% | — | — |
| Mar | 82% | — | — |
| Apr | 79% | — | — |
| May | 86% | — | — |
| Jun | 94% | — | — |
| Jul | 98% | — | — |
| Aug | 100% | — | — |
| Sep | 96% | — | — |
| Oct | 90% | — | — |
| Nov | 79% | — | — |
| Dec | 71% | — | — |
% = share of sampled days scoring in the favorable band, median across 2 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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