All data are in degrees Fahrenheit

en

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

87.4

°F

July 21, 00:27

Trend:

stable

Yesterday:

87.2°F

Tomorrow:

87.4°F

Sunrise:

06:31

Sunset:

20:28

Day Length:

13 h. 57 min.

Hilton Head Island in July

Minimum:

49.0°F

Average:

55.7°F

Maximum:

62.6°F

Sea water temperature in Hilton Head Island today

As of now, in Hilton Head Island, the water temperature is 87.4°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 1.7°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 87.6°F on 2020, while the historical minimum was 83.8°F on 2021.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 87.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Hilton Head Island

Date Current Year

actual* / forecast**

last year 10 years average
Jul 7 86.0°F 84.1°F 84.6°F
Jul 8 86.0°F 84.3°F 84.7°F
Jul 9 86.0°F 84.4°F 84.8°F
Jul 10 86.4°F 85.0°F 84.9°F
Jul 11 86.5°F 85.0°F 85.0°F
Jul 12 87.0°F 84.2°F 85.1°F
Jul 13 86.4°F 83.9°F 85.1°F
Jul 14 86.3°F 84.6°F 85.2°F
Jul 15 86.1°F 84.6°F 85.3°F
Jul 16 85.8°F 85.5°F 85.3°F
Jul 17 85.2°F 85.3°F 85.4°F
Jul 18 86.4°F 85.6°F 85.5°F
Jul 19 87.3°F 85.1°F 85.6°F
Jul 20 87.2°F 86.8°F 85.5°F
Jul 21 87.4°F 86.5°F 85.7°F
Jul 22 87.4°F 86.9°F 85.7°F
Jul 23 87.4°F 86.7°F 85.7°F
Jul 24 87.5°F 87.0°F 85.8°F
Jul 25 87.5°F 86.6°F 85.7°F
Jul 26 87.4°F 86.6°F 85.6°F
Jul 27 87.5°F 86.8°F 85.7°F
Jul 28 87.5°F 88.1°F 85.7°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, 83.7°F in Summer, and 74.2°F in Autumn.