Best Time to Dive Newfoundland and Labrador
Across 4 Newfoundland and Labrador dive sites with multi-year conditions history, July historically shows the most favorable days — 99% of sampled days in the good band. The next-highest months are June (97%), August (95%) and September (94%). February historically shows the fewest favorable days (65% of sampled days). Average water temperature in the sample runs from about 0°C in March to 15°C in August. Typical seas range from 0.3 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.
Which months are historically most favorable in Newfoundland and Labrador?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 73% | 2°C | 0.7 m |
| Feb | 65% | 0°C | 0.9 m |
| Mar | 69% | 0°C | 0.7 m |
| Apr | 78% | 1°C | 0.8 m |
| May | 94% | 3°C | 0.5 m |
| Jun | 97% | 7°C | 0.4 m |
| Jul | 99% | 12°C | 0.3 m |
| Aug | 95% | 15°C | 0.4 m |
| Sep | 94% | 14°C | 0.4 m |
| Oct | 86% | 11°C | 0.6 m |
| Nov | 68% | 8°C | 0.8 m |
| Dec | 71% | 4°C | 0.7 m |
% = share of sampled days scoring in the favorable band, median across 4 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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