September is a popular month to ask about Northport Beach because conditions can shift week to week along this coast. Expect the water near 15.0°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.
Northport Beach sea temperature in September — averages 15.0°C
The sea at Northport Beach in Canada averages 15.0°C during September, 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 · September
15.0°C
mild · Fair
Live water now
…
Recommended wetsuit
4/3mm fullsuit
At 15.0°C you need a 4/3mm fullsuit, and many surfers add neoprene boots.
Monthly comparison
Cool — short dips or a shorty wetsuit · Northport Beach
Can you swim at Northport Beach in July? — 16.0°C water16.0°CCan you swim at Northport Beach in August? — 17.0°C water17.0°CCan you swim at Northport Beach in September? — 15.0°C water15.0°CCan you swim at Northport Beach in October? — 11.0°C water11.0°CCan you swim at Northport Beach in November? — 8.0°C water8.0°CCan you swim at Northport Beach in December? — 5.0°C water5.0°C
Frequently asked questions
What is the average sea temperature at Northport Beach in September?
Northport Beach averages 15.0°C in September, based on long-run climatology for the Gulf of St Lawrence.
Is the sea warm enough to swim at Northport Beach in September?
Not without thermal protection — a wetsuit is recommended at 15.0°C.
Do I need a wetsuit at Northport Beach in September?
A 3/2 mm wetsuit makes longer swims comfortable.