The highest day temperature in August 2023 was 103°F. The lowest night temperature was 76°F. The average values for day and night temperatures during August were 93.8°F и 80.7°F respectivly.

The average sea surface temperature in August 2023 for Hilton Head Island was 90.6°F. The maximum and minimum values were 88.8°F and 92.0°F respectively.

Most of the days in August are cloudy but you can also expect sunny or gloomy days.

Precipitation total in August for Hilton Head Island is 3.0 in. It makes august the most rainy month of the year.

The average wind speed in August is 5.5 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Hilton Head Island in August is 6.3 hours.