The highest day temperature in October 2025 was 86°F. The lowest night temperature was 51°F. The average values for day and night temperatures during October were 75.0°F и 64.5°F respectivly.

The average sea surface temperature in October 2025 for Hilton Head Island was 75.4°F. The maximum and minimum values were 67.8°F and 82.4°F respectively.

Most of the days in October are sunny but you can also expect cloudy and gloomy days.

Precipitation total in October for Hilton Head Island is 0.7 in. It makes october one of the least rainy months of the year.

The average wind speed in October is 7.6 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 October is 7.7 hours.