Ontario Sea Water Temperature
Compare sea surface temperatures across 59 top coastal destinations in Ontario. Check below for live marine observations, wave conditions, and monthly averages.
Beaches & Swimming Spots in Ontario— page 1 of 3
Allenwood Beach
A cool beach on the James Bay, warmest around August at about 20.6°C.
Bailey's Beach
A cool beach on the James Bay, warmest around August at about 24.3°C.
Beach Area 1 & 2
A cool beach on the James Bay, warmest around August at about 20.6°C.
Beach Area 3
A cool beach on the James Bay, warmest around August at about 20.6°C.
Beach Area 4
A cool beach on the James Bay, warmest around August at about 20.6°C.
Beach Area 5
A cool beach on the James Bay, warmest around August at about 20.6°C.
Beach Area 6
A cool beach on the James Bay, warmest around August at about 20.6°C.
Beachway Park
A cool beach on the James Bay, warmest around August at about 20.9°C.
Beaver Island Beach
A cool beach on the James Bay, warmest around August at about 23.4°C.
Black Willow Beach
A cool beach on the James Bay, warmest around August at about 24.2°C.
Bluffer's Beach
A cool beach on the James Bay, warmest around August at about 21.3°C.
Boulder Beach
A cool beach on the James Bay, warmest around August at about 19.5°C.
Campers Beach
A cool beach on the James Bay, warmest around August at about 22.3°C.
Carter's Bay
A cool beach on the James Bay, warmest around August at about 18.9°C.
Cherry Beach
A cool beach on the James Bay, warmest around August at about 21.1°C.
Colchester Beach
A cool beach on the James Bay, warmest around August at about 24.3°C.
Day Use Beach
A cool beach on the James Bay, warmest around August at about 20.1°C.
Deanlea Beach
A cool beach on the James Bay, warmest around August at about 20.6°C.
Dog River Beach
A cool beach on the James Bay, warmest around August at about 15.7°C.
Driftwood Beach
A cool beach on the James Bay, warmest around August at about 15.7°C.
East Barrier Beach
A cool beach on the James Bay, warmest around August at about 24.2°C.
East Beach
A cool beach on the James Bay, warmest around August at about 24.2°C.
East Beach
A cool beach on the James Bay, warmest around August at about 24.2°C.
East Point Beach
A cool beach on the James Bay, warmest around August at about 24.2°C.