Best Time to Dive Montana
Across 5 Montana dive sites with multi-year conditions history, January, March, April, July and September historically show the most favorable days — 100% 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 | 100% | — | — |
| Feb | 98% | — | — |
| Mar | 100% | — | — |
| Apr | 100% | — | — |
| May | 97% | — | — |
| Jun | 97% | — | — |
| Jul | 100% | — | — |
| Aug | 98% | — | — |
| Sep | 100% | — | — |
| Oct | 98% | — | — |
| Nov | 98% | — | — |
| Dec | 94% | — | — |
% = share of sampled days scoring in the favorable band, median across 5 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.
Diving Montana soon? Browse its dive sites with live 7-day windows — free, no account needed.
Choosing between destinations? Compare them month by month with the Trip PlannerPro