May is a popular month to ask about Good Harbor 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 Atlantic Ocean.
Good Harbor Beach sea temperature in May — averages 10.0°C
The sea at Good Harbor Beach in United States averages 10.0°C during May, based on long-run climatology for the Atlantic Ocean. 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 · Good Harbor Beach
Can you swim at Good Harbor Beach in June? — 15.0°C water15.0°CCan you swim at Good Harbor Beach in July? — 19.0°C water19.0°CCan you swim at Good Harbor Beach in August? — 20.0°C water20.0°CCan you swim at Good Harbor Beach in September? — 18.0°C water18.0°CCan you swim at Good Harbor Beach in October? — 14.0°C water14.0°CCan you swim at Good Harbor Beach in November? — 10.0°C water10.0°C
Frequently asked questions
What is the average sea temperature at Good Harbor Beach in May?
Good Harbor Beach averages 10.0°C in May, based on long-run climatology for the Atlantic Ocean.
Is the sea warm enough to swim at Good Harbor Beach in May?
Not without thermal protection — a wetsuit is recommended at 10.0°C.
Do I need a wetsuit at Good Harbor Beach in May?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.