Twelvemile Beach Sea Water Temperature
A cool beach on the James Bay, warmest around August at about 16.5°C. Today's reading, 7-day forecast, and monthly averages below.
Twelvemile Beach water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Twelvemile Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Twelvemile Beach occurs inJuly, August, September, October — peaking at16.5°C (61.7°F) in August.
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°C | 2.5°C | 4.3°C | Very Cold (< 16°C) |
| February | 0°C | 1.7°C | 4.2°C | Very Cold (< 16°C) |
| March | 0.1°C | 1.4°C | 3°C | Very Cold (< 16°C) |
| April | 0.2°C | 1.7°C | 3.3°C | Very Cold (< 16°C) |
| May | 1.2°C | 3.1°C | 5.1°C | Very Cold (< 16°C) |
| June | 2.1°C | 5.5°C | 12.2°C | Very Cold (< 16°C) |
| July | 5.1°C | 11.4°C | 19.6°C | Very Cold (< 16°C) |
| August | 6.8°C | 16.5°C | 20.9°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 8.3°C | 14.7°C | 18.9°C | Very Cold (< 16°C) |
| October | 6.4°C | 11.2°C | 16.9°C | Very Cold (< 16°C) |
| November | 2.7°C | 7.2°C | 11.3°C | Very Cold (< 16°C) |
| December | 1.9°C | 4.2°C | 7°C | Very Cold (< 16°C) |
Swimming FAQs for Twelvemile Beach
Is the sea warm enough to swim in Twelvemile Beach today?
Typical sea surface temperature in Twelvemile Beach this time of year is 14.7°C (58.5°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 Twelvemile Beach?
The highest water temperatures in Twelvemile Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Twelvemile Beach in September?
Historically in September, water temperatures in Twelvemile Beach average around14.7°C (58.5°F), fluctuating between a recorded minimum of 8.3°C and a maximum of 18.9°C.