September is a popular month to ask about Hilton Head Beach because conditions can shift week to week along this coast. Expect the water near 27.0°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.
Hilton Head Beach sea temperature in September — averages 27.0°C
The sea at Hilton Head Beach in United States averages 27.0°C during September, 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 · September
27.0°C
tropical · Excellent
Live water now
…
Recommended wetsuit
No wetsuit
At 27.0°C the water is warm enough to swim and surf in just a swimsuit or boardshorts.
Monthly comparison
Yes — ideal swimming weather · Hilton Head Beach
Can you swim at Hilton Head Beach in June? — 27.0°C water27.0°CCan you swim at Hilton Head Beach in July? — 29.0°C water29.0°CCan you swim at Hilton Head Beach in August? — 29.0°C water29.0°CCan you swim at Hilton Head Beach in September? — 27.0°C water27.0°CCan you swim at Hilton Head Beach in October? — 23.0°C water23.0°CCan you swim at Hilton Head Beach in November? — 19.0°C water19.0°C
Frequently asked questions
What is the average sea temperature at Hilton Head Beach in September?
Hilton Head Beach averages 27.0°C in September, based on long-run climatology for the Atlantic Ocean.
Is the sea warm enough to swim at Hilton Head Beach in September?
Yes, most swimmers find 27.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Hilton Head Beach in September?
No wetsuit needed.