All data are in degrees Fahrenheit

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Water temperature in Hilton Head Island

Detailed information about the current water temperature in Hilton Head Island. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Hilton Head Island now

87.0

°F

August 2, 07:56

Trend:

decreasing

Yesterday:

87.1°F

Tomorrow:

86.9°F

Sunrise:

06:38

Sunset:

20:20

Day Length:

13 h. 42 min.

Hilton Head Island in August

Minimum:

48.0°F

Average:

55.7°F

Maximum:

62.4°F

Sea water temperature in Hilton Head Island today

As of now, in Hilton Head Island, the water temperature is 87.0°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 1.6°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's reading indicates a minor change compared to the average water temperature of the last two weeks, but the overall trend remains steady. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 88.4°F on 2025, while the historical minimum was 83.5°F on 2017.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 86.6°F, the minimum temperature may reach 86.3°F, and the maximum might stay at 86.9°F.

Daily water temperature in Hilton Head Island

Date Current Year

actual* / forecast**

last year 10 years average
Jul 19 87.3°F 85.1°F 85.6°F
Jul 20 87.2°F 86.8°F 85.6°F
Jul 21 87.0°F 86.5°F 85.8°F
Jul 22 86.7°F 86.9°F 85.8°F
Jul 23 87.3°F 86.7°F 85.8°F
Jul 24 86.7°F 87.0°F 85.9°F
Jul 25 86.8°F 86.6°F 85.8°F
Jul 26 86.5°F 86.6°F 85.7°F
Jul 27 86.9°F 86.8°F 85.8°F
Jul 28 87.0°F 88.1°F 85.8°F
Jul 29 86.3°F 88.0°F 85.6°F
Jul 30 87.3°F 87.7°F 85.7°F
Jul 31 87.1°F 88.3°F 85.7°F
Aug 1 87.1°F 88.8°F 85.8°F
Aug 2 87.0°F 88.4°F 85.4°F
Aug 3 86.9°F 87.8°F 85.4°F
Aug 4 86.8°F 87.2°F 85.2°F
Aug 5 86.6°F 86.3°F 85.0°F
Aug 6 86.5°F 86.1°F 84.9°F
Aug 7 86.6°F 86.1°F 85.0°F
Aug 8 86.5°F 84.3°F 84.9°F
Aug 9 86.3°F 84.0°F 84.7°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Hilton Head Island by month

In Hilton Head Island, the months May through October offer comfortable swimming conditions, which amounts to 164 swimming days.
The warmest water in Hilton Head Island was recorded on August 1, 2025, reaching a 88.8°F. While the coldest temperature occurred on January 24, 2025, dipping to 44.6°F. The average readings by season are 55.9°F in Winter, 68.0°F in Spring, 83.8°F in Summer, and 74.2°F in Autumn.