Best Time to Dive Michigan
Across 33 Michigan dive sites with multi-year conditions history, July historically shows the most favorable days — 88% of sampled days in the good band. The next-highest months are September (88%), August (81%) and June (73%). November historically shows the fewest favorable days (37% 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 Michigan?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 53% | — | — |
| Feb | 44% | — | — |
| Mar | 51% | — | — |
| Apr | 51% | — | — |
| May | 73% | — | — |
| Jun | 73% | — | — |
| Jul | 88% | — | — |
| Aug | 81% | — | — |
| Sep | 88% | — | — |
| Oct | 54% | — | — |
| Nov | 37% | — | — |
| Dec | 45% | — | — |
% = share of sampled days scoring in the favorable band, median across 33 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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