Plum Beach Sea Water Temperature
A temperate beach on the James Bay, warmest around August at about 20.8°C. Today's reading, 7-day forecast, and monthly averages below.
Plum Beach water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
Plum Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Plum Beach occurs inJuly, August, September, October — peaking at20.8°C (69.4°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 | 3.1°C | 6.6°C | 9.2°C | Very Cold (< 16°C) |
| February | 2.8°C | 4.5°C | 7.1°C | Very Cold (< 16°C) |
| March | 1.5°C | 4.4°C | 7.6°C | Very Cold (< 16°C) |
| April | 3.7°C | 6.8°C | 10.6°C | Very Cold (< 16°C) |
| May | 8.5°C | 10.9°C | 16.1°C | Very Cold (< 16°C) |
| June | 9.9°C | 15.9°C | 20°C | Very Cold (< 16°C) |
| July | 17.5°C | 19.7°C | 22.1°C | Cool / Refreshing (16°C – 20°C) |
| August | 17.7°C | 20.8°C | 23.5°C | Comfortable (20°C – 24°C) |
| SeptemberCurrent | 17.3°C | 19.6°C | 21.8°C | Cool / Refreshing (16°C – 20°C) |
| October | 14.2°C | 16.7°C | 19.1°C | Cool / Refreshing (16°C – 20°C) |
| November | 10.7°C | 13.1°C | 16.1°C | Very Cold (< 16°C) |
| December | 6.9°C | 9.5°C | 11.9°C | Very Cold (< 16°C) |
Swimming FAQs for Plum Beach
Is the sea warm enough to swim in Plum Beach today?
Typical sea surface temperature in Plum Beach this time of year is 19.6°C (67.3°F) — classified as Cool / Refreshing (16°C – 20°C). Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing. Live readings load automatically.
What are the warmest months for swimming in Plum Beach?
The highest water temperatures in Plum Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Plum Beach in September?
Historically in September, water temperatures in Plum Beach average around19.6°C (67.3°F), fluctuating between a recorded minimum of 17.3°C and a maximum of 21.8°C.