Dennis Beach Sea Water Temperature
A cool beach on the James Bay, warmest around September at about 15.3°C. Today's reading, 7-day forecast, and monthly averages below.
Dennis Beach water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Dennis Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Dennis Beach occurs inJuly, August, September, October — peaking at15.3°C (59.5°F) in September.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | -0.3°C | 3.1°C | 5.9°C | Very Cold (< 16°C) |
| February | -1°C | 1.2°C | 3.7°C | Very Cold (< 16°C) |
| March | -1.4°C | 0.9°C | 3.4°C | Very Cold (< 16°C) |
| April | -1°C | 2.3°C | 6.1°C | Very Cold (< 16°C) |
| May | -0.3°C | 5.2°C | 8.2°C | Very Cold (< 16°C) |
| June | 7.2°C | 9.4°C | 11.9°C | Very Cold (< 16°C) |
| July | 9°C | 12.5°C | 16.4°C | Very Cold (< 16°C) |
| August | 12.8°C | 14.6°C | 16.2°C | Very Cold (< 16°C) |
| SeptemberCurrent | 13.6°C | 15.3°C | 17.1°C | Very Cold (< 16°C) |
| October | 10.8°C | 13.7°C | 15.6°C | Very Cold (< 16°C) |
| November | 8.1°C | 10.4°C | 13.7°C | Very Cold (< 16°C) |
| December | -0.1°C | 6.2°C | 9.3°C | Very Cold (< 16°C) |
Swimming FAQs for Dennis Beach
Is the sea warm enough to swim in Dennis Beach today?
Typical sea surface temperature in Dennis Beach this time of year is 15.3°C (59.5°F) — classified as Very Cold (< 16°C). Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges. Live readings load automatically.
What are the warmest months for swimming in Dennis Beach?
The highest water temperatures in Dennis Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Dennis Beach in September?
Historically in September, water temperatures in Dennis Beach average around15.3°C (59.5°F), fluctuating between a recorded minimum of 13.6°C and a maximum of 17.1°C.