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

85.3

°F

September 16, 21:29

Trend:

stable

Yesterday:

84.7°F

Tomorrow:

85.1°F

Sunrise:

07:07

Sunset:

19:28

Day Length:

12 h. 21 min.

Hilton Head Island in September

Minimum:

48.7°F

Average:

55.3°F

Maximum:

62.0°F

Sea water temperature in Hilton Head Island today

As of now, in Hilton Head Island, the water temperature is 85.3°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 3.9°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 83.9°F on 2023, while the historical minimum was 77.5°F on 2024.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 84.7°F, the minimum temperature may reach 84.2°F, and the maximum might stay at 85.1°F.

Daily water temperature in Hilton Head Island

Date Current Year

actual* / forecast**

last year 10 years average
Sep 2 84.5°F 80.4°F 84.0°F
Sep 3 84.0°F 80.6°F 83.6°F
Sep 4 84.9°F 79.6°F 83.5°F
Sep 5 85.2°F 79.8°F 83.4°F
Sep 6 85.1°F 80.5°F 83.1°F
Sep 7 86.1°F 80.3°F 83.3°F
Sep 8 85.3°F 81.3°F 83.2°F
Sep 9 85.0°F 81.1°F 83.0°F
Sep 10 84.2°F 80.9°F 82.9°F
Sep 11 83.6°F 79.9°F 82.5°F
Sep 12 83.4°F 79.0°F 82.2°F
Sep 13 84.0°F 78.9°F 82.3°F
Sep 14 83.5°F 78.5°F 82.0°F
Sep 15 84.7°F 78.1°F 82.1°F
Sep 16 85.3°F 78.1°F 81.4°F
Sep 17 85.1°F 77.3°F 81.2°F
Sep 18 85.0°F 77.8°F 81.1°F
Sep 19 84.9°F 78.0°F 81.0°F
Sep 20 84.9°F 79.2°F 81.0°F
Sep 21 84.7°F 79.7°F 80.8°F
Sep 22 84.5°F 79.8°F 80.6°F
Sep 23 84.2°F 78.4°F 80.3°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.