Best Time to Dive Quebec
Across 2 Quebec dive sites with multi-year conditions history, September historically shows the most favorable days — 85% of sampled days in the good band. The next-highest months are July (84%), August (80%) and June (76%). February historically shows the fewest favorable days (50% of sampled days). Average water temperature in the sample runs from about -1°C in February to 17°C in August. Typical seas range from 0.8 m to 1.7 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 Quebec?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 57% | 0°C | 1.6 m |
| Feb | 50% | -1°C | 1.3 m |
| Mar | 59% | -1°C | 1.3 m |
| Apr | 61% | 1°C | 1.2 m |
| May | 73% | 5°C | 1.1 m |
| Jun | 76% | 10°C | 1.0 m |
| Jul | 84% | 16°C | 0.8 m |
| Aug | 80% | 17°C | 0.9 m |
| Sep | 85% | 15°C | 0.9 m |
| Oct | 68% | 10°C | 1.2 m |
| Nov | 53% | 6°C | 1.6 m |
| Dec | 54% | 2°C | 1.7 m |
% = 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.
Marine life seasons
Sighting patterns across the wider US & Canada — Atlantic coast region — not site-specific promises.
- Scalloped hammerheadAugust
- Great white sharkAug–Sep
- Giant oceanic manta rayJul–Sep
- OrcaMay–Aug
- Humpback whaleJun–Aug
Bars are Jan–Dec — months when sightings historically concentrate (GBIF occurrence records). Wildlife is never guaranteed.
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