July is a popular month to ask about Greenwich Beach because conditions can shift week to week along this coast. Expect the water near 18.0°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 July — averages 18.0°C
The sea at Greenwich Beach in Canada averages 18.0°C during July, 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 · July
18.0°C
mild · Good
Live water now
…
Recommended wetsuit
3/2mm fullsuit
At 18.0°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports.
Monthly comparison
Yes, but expect a fresh dip · 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 July?
Greenwich Beach averages 18.0°C in July, based on long-run climatology for the Gulf of St Lawrence.
Is the sea warm enough to swim at Greenwich Beach in July?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Greenwich Beach in July?
A 2 mm shorty is comfortable for sessions over 30 minutes.