December 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 3.0°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 December — averages 3.0°C
The sea at Ward's Island Beach in Canada averages 3.0°C during December, 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 · December
3.0°C
cold · Poor
Live water now
…
Recommended wetsuit
6/5/4mm hooded fullsuit or drysuit
At 3.0°C only experienced cold-water athletes should enter — full thermal protection required.
Monthly comparison
Cold — wetsuit recommended · 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 December?
Ward's Island Beach averages 3.0°C in December, based on long-run climatology for the Lake Ontario.
Is the sea warm enough to swim at Ward's Island Beach in December?
Not without thermal protection — a wetsuit is recommended at 3.0°C.
Do I need a wetsuit at Ward's Island Beach in December?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.