St Simons Island weather in August 2025

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

  • 31°C maximum daytime temperature in August in St Simons Island31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 14 days with some rainfall in August in St Simons Island14
    14 days with some rainfall
  • 23°C minimum night-time temperature in August in St Simons Island23
    23°C min night temperature
  • 13 hours of daylight per day in August in St Simons Island13
    13 hours of daylight per day
  • Very high heat & humidity in August in St Simons IslandVH
    Very High heat & humidity
  • 169 mm monthly rainfall in August in St Simons Island169
    169 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in St Simons Island10
    10 (Very High) UV index
  • 28°C sea temperature in August in St Simons Island28
    28°C sea temperature

More about St Simons Island

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The August weather guide for Georgia (USA) (St Simons 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 St Simons Island in August?

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

How sunny is it in St Simons Island in August?

There are normally 8 hours of bright sunshine each day in St Simons Island in August - that's 63% of daylight hours.

How warm is the sea around St Simons Island in August?

The average sea temperature around St Simons Island in August is 28°C.

Does it rain in St Simons Island in August?

There are usually 14 days with some rain in St Simons Island in August and the average monthly rainfall is 169mm.

What is the chance of a hurricane in St Simons Island in August?

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

St Simons Island August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:43 19:21
Saturday, 16th August 2025 05:52 19:07
Sunday, 31st August 2025 06:01 18:50

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