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

85.4

°F

August 29, 18:51

Trend:

stable

Yesterday:

85.9°F

Tomorrow:

85.4°F

Sunrise:

06:56

Sunset:

19:51

Day Length:

12 h. 55 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 85.4°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 1.0°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 water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 87.1°F on 2023, while the historical minimum was 81.7°F on 2024.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 84.8°F, the minimum temperature may reach 84.2°F, and the maximum might stay at 85.4°F.

Daily water temperature in Hilton Head Island

Date Current Year

actual* / forecast**

last year 10 years average
Aug 15 85.5°F 84.8°F 85.5°F
Aug 16 85.4°F 84.4°F 85.3°F
Aug 17 85.4°F 84.8°F 85.3°F
Aug 18 87.2°F 84.4°F 85.3°F
Aug 19 87.4°F 85.0°F 85.2°F
Aug 20 87.7°F 85.7°F 85.5°F
Aug 21 87.7°F 85.4°F 85.5°F
Aug 22 87.9°F 85.2°F 85.6°F
Aug 23 87.2°F 85.4°F 85.5°F
Aug 24 86.7°F 85.1°F 85.2°F
Aug 25 86.9°F 83.1°F 84.8°F
Aug 26 86.6°F 84.3°F 84.6°F
Aug 27 86.5°F 84.1°F 84.5°F
Aug 28 85.9°F 83.6°F 84.5°F
Aug 29 85.4°F 83.2°F 84.4°F
Aug 30 85.4°F 83.2°F 84.4°F
Aug 31 85.2°F 81.9°F 84.2°F
Sep 1 85.2°F 81.2°F 84.2°F
Sep 2 84.9°F 80.4°F 83.9°F
Sep 3 84.6°F 80.6°F 83.6°F
Sep 4 84.4°F 79.6°F 83.4°F
Sep 5 84.2°F 79.8°F 83.2°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.