January is a popular month to ask about Greenwich Beach because conditions can shift week to week along this coast. Expect the water near -1.0°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 Gulf of St Lawrence.
Greenwich Beach sea temperature in January — averages -1.0°C
The sea at Greenwich Beach in Canada averages -1.0°C during January, based on long-run climatology for the Gulf of St Lawrence. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · January
-1.0°C
cold · Poor
Live water now
…
Recommended wetsuit
6/5/4mm hooded fullsuit or drysuit
At -1.0°C only experienced cold-water athletes should enter — full thermal protection required.
Monthly comparison
Cold — wetsuit recommended · Greenwich Beach
Can you swim at Greenwich Beach in June? — 13.0°C water13.0°CCan you swim at Greenwich Beach in July? — 18.0°C water18.0°CCan you swim at Greenwich Beach in August? — 20.0°C water20.0°CCan you swim at Greenwich Beach in September? — 17.0°C water17.0°CCan you swim at Greenwich Beach in October? — 12.0°C water12.0°CCan you swim at Greenwich Beach in November? — 6.0°C water6.0°C
Frequently asked questions
What is the average sea temperature at Greenwich Beach in January?
Greenwich Beach averages -1.0°C in January, based on long-run climatology for the Gulf of St Lawrence.
Is the sea warm enough to swim at Greenwich Beach in January?
Not without thermal protection — a wetsuit is recommended at -1.0°C.
Do I need a wetsuit at Greenwich Beach in January?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.