May is a popular month to ask about Grand Bend Beach because conditions can shift week to week along this coast. Expect the water near 10.0°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 Great Lakes.
Grand Bend Beach sea temperature in May — averages 10.0°C
The sea at Grand Bend Beach in Canada averages 10.0°C during May, based on long-run climatology for the Great Lakes. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · May
10.0°C
cool · Poor
Live water now
…
Recommended wetsuit
5/4mm fullsuit + boots & gloves
At 10.0°C you need a 5/4mm fullsuit with boots, gloves and ideally a hood.
Monthly comparison
Cold — wetsuit recommended · Grand Bend Beach
Can you swim at Grand Bend Beach in June? — 16.0°C water16.0°CCan you swim at Grand Bend Beach in July? — 21.0°C water21.0°CCan you swim at Grand Bend Beach in August? — 22.0°C water22.0°CCan you swim at Grand Bend Beach in September? — 19.0°C water19.0°CCan you swim at Grand Bend Beach in October? — 13.0°C water13.0°CCan you swim at Grand Bend Beach in November? — 7.0°C water7.0°C
Frequently asked questions
What is the average sea temperature at Grand Bend Beach in May?
Grand Bend Beach averages 10.0°C in May, based on long-run climatology for the Great Lakes.
Is the sea warm enough to swim at Grand Bend Beach in May?
Not without thermal protection — a wetsuit is recommended at 10.0°C.
Do I need a wetsuit at Grand Bend Beach in May?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.