Ontario, Canada
James Bay42.66°N, 81.22°WStation CA-ONT-POR

Port Stanley Main Beach Sea Water Temperature

A cool beach on the James Bay, warmest around August at about 23°C. Today's reading, 7-day forecast, and monthly averages below.

Live readings · auto-updating
Water Temperature NowBuoy & Sentinel-3 SST

Port Stanley Main Beach water temperature

21
69.8°FComfortable (20°C – 24°C)

Pleasant and revitalizing. Great for most beachgoers and active recreational swimming.

+0°vs Sep avgJames Bay42.66°N, 81.22°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
23°C
72.5°F onshore
Wind Speed
12 km/h
Surface wind
Wave Height
0.8 m
Slight shore chop
Swell
0.6 m
Deep water swell
Wave Period
6 s
Peak interval
UV Index
—
Daily maximum
Sunrise
—
First morning light
Sunset
—
Golden hour close

7-Day Water Temperature Forecast

Open-Meteo ocean model
Today
WedSep 30
21°C
69.8°F
Waves: 1m
Comfortable
ThuOct 1
21.3°C
70.3°F
Waves: 0.9m
Comfortable
FriOct 2
21.4°C
70.5°F
Waves: 0.7m
Comfortable
SatOct 3
21.3°C
70.3°F
Waves: 0.6m
Comfortable
SunOct 4
21°C
69.8°F
Waves: 0.7m
Comfortable
MonOct 5
20.7°C
69.3°F
Waves: 0.9m
Comfortable
TueOct 6
20.6°C
69.1°F
Waves: 1m
Comfortable
Forecast cooling trend: -0.4°C over 7 days at Port Stanley Main Beach.
Confidence: High

Port Stanley Main Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Port Stanley Main Beach occurs inJune, July, August, September — peaking at23°C (73.4°F) in August.

Year-Round Water Temperature Curve (°C / °F)

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
2
Jan
1
Feb
1
Mar
4
Apr
10
May
17
Jun
22
Jul
23
Aug
Current
21
Sep
16
Oct
11
Nov
6
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January0°C2°C4.8°CVery Cold (< 16°C)
February0.1°C0.7°C2.5°CVery Cold (< 16°C)
March0°C1.2°C5.3°CVery Cold (< 16°C)
April0.8°C4.1°C8.1°CVery Cold (< 16°C)
May4.8°C9.7°C15.8°CVery Cold (< 16°C)
June13.4°C17°C20.6°CCool / Refreshing (16°C – 20°C)
July19.5°C21.9°C24.8°CComfortable (20°C – 24°C)
August20.1°C23°C25.7°CComfortable (20°C – 24°C)
SeptemberCurrent17.8°C21°C24.2°CComfortable (20°C – 24°C)
October12.1°C16.4°C20°CCool / Refreshing (16°C – 20°C)
November7.1°C10.7°C15.1°CVery Cold (< 16°C)
December2.2°C5.5°C9.3°CVery Cold (< 16°C)

Swimming FAQs for Port Stanley Main Beach

Is the sea warm enough to swim in Port Stanley Main Beach today?

Typical sea surface temperature in Port Stanley Main Beach this time of year is 21°C (69.8°F) — classified as Comfortable (20°C – 24°C). Pleasant and revitalizing. Great for most beachgoers and active recreational swimming. Live readings load automatically.

What are the warmest months for swimming in Port Stanley Main Beach?

The highest water temperatures in Port Stanley Main Beach typically occur duringJune, July, August, September, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Port Stanley Main Beach in September?

Historically in September, water temperatures in Port Stanley Main Beach average around21°C (69.8°F), fluctuating between a recorded minimum of 17.8°C and a maximum of 24.2°C.

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Port Stanley Main Beach Coastal Zone Map

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