September is a popular month to ask about Ward's Island Beach because conditions can shift week to week along this coast. Expect the water near 19.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Lake Ontario.
Ward's Island Beach sea temperature in September — averages 19.0°C
The sea at Ward's Island Beach in Canada averages 19.0°C during September, based on long-run climatology for the Lake Ontario. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · September
19.0°C
mild · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 19.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes, but expect a fresh dip · Ward's Island Beach
Can you swim at Ward's Island Beach in July? — 21.0°C water21.0°CCan you swim at Ward's Island Beach in August? — 22.0°C water22.0°CCan you swim at Ward's Island Beach in September? — 19.0°C water19.0°CCan you swim at Ward's Island Beach in October? — 13.0°C water13.0°CCan you swim at Ward's Island Beach in November? — 7.0°C water7.0°CCan you swim at Ward's Island Beach in December? — 3.0°C water3.0°C
Frequently asked questions
What is the average sea temperature at Ward's Island Beach in September?
Ward's Island Beach averages 19.0°C in September, based on long-run climatology for the Lake Ontario.
Is the sea warm enough to swim at Ward's Island Beach in September?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Ward's Island Beach in September?
A 2 mm shorty is comfortable for sessions over 30 minutes.