April is a popular month to ask about Hilton Head because conditions can shift week to week along this coast. Expect the water near 19.0°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 sea temperature in April — averages 19.0°C
The sea at Hilton Head in United States averages 19.0°C during April, 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 · April
19.0°C
mild · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 19.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes, but expect a fresh dip · Hilton Head
Can you swim at Hilton Head in June? — 27.0°C water27.0°CCan you swim at Hilton Head in July? — 29.0°C water29.0°CCan you swim at Hilton Head in August? — 29.0°C water29.0°CCan you swim at Hilton Head in September? — 27.0°C water27.0°CCan you swim at Hilton Head in October? — 23.0°C water23.0°CCan you swim at Hilton Head in November? — 19.0°C water19.0°C
Frequently asked questions
What is the average sea temperature at Hilton Head in April?
Hilton Head averages 19.0°C in April, based on long-run climatology for the Atlantic Ocean.
Is the sea warm enough to swim at Hilton Head in April?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Hilton Head in April?
A 2 mm shorty is comfortable for sessions over 30 minutes.