St Simons Island weather in August 2026

Expect daytime maximum temperatures of 31°C in St Simons Island, Georgia (USA) in August and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 14 days with some rainfall and typically 169 mm of rainfall in the month.

  • 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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More about the USA

How hot is it in St Simons Island in August?

Daytime temperatures usually reach 31°C in St Simons Island in August with high heat and humidity, falling to 20°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 62% of daylight hours.

Does it rain in St Simons Island in August?

There are usually 9 days with some rain in St Simons Island in August and the average monthly rainfall is 86mm.

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

On average less than 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 2026. Select a month to view St Simons Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 05:43 19:21
Sunday, 16th August 2026 05:52 19:07
Monday, 31st August 2026 06:01 18:50

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