Hilton Head Island weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Hilton Head Island in August. Check more long-term weather averages for Hilton Head Island in August before you book your next holiday to South Carolina in 2025/2026.

  • 31°C maximum daytime temperature in August in Hilton Head Island31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in August in Hilton Head Island13
    13 days with some rainfall
  • 23°C minimum night-time temperature in August in Hilton Head Island23
    23°C min night temperature
  • 13 hours of daylight per day in August in Hilton Head Island13
    13 hours of daylight per day
  • Very high heat & humidity in August in Hilton Head IslandVH
    Very High heat & humidity
  • 193 mm monthly rainfall in August in Hilton Head Island193
    193 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Hilton Head Island10
    10 (Very High) UV index
  • 28°C sea temperature in August in Hilton Head Island28
    28°C sea temperature

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The August weather guide for South Carolina (Hilton Head Island) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Hilton Head Island in August?

Daytime temperatures usually reach 31°C in Hilton Head Island in August with very high heat and humidity, falling to 23°C at night.

How sunny is it in Hilton Head Island in August?

There are normally 8 hours of bright sunshine each day in Hilton Head Island in August - that's 61% of daylight hours.

How warm is the sea around Hilton Head Island in August?

The average sea temperature around Hilton Head Island in August is 28°C.

Does it rain in Hilton Head Island in August?

There are usually 13 days with some rain in Hilton Head Island in August and the average monthly rainfall is 193mm.

What is the chance of a hurricane in Hilton Head Island in August?

On average 1 day in August in Hilton Head Island is likely to be affected by the passage of one or more tropical storms.

Hilton Head Island August sunrise & sunset times

Browse the sunrise and sunset times for Hilton Head Island in August 2025. Select a month to view Hilton Head Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:38 19:20
Saturday, 16th August 2025 05:48 19:06
Sunday, 31st August 2025 05:58 18:48

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