National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Brunswick, Malcolm McKinnon Airport (KSSI)

Lat: 31.15°NLon: 81.39°WElev: 20ft.

Thunderstorm Light Rain Fog

77°F

25°C

Humidity 89%
Wind Speed N 15 mph
Barometer 30.04 in
Dewpoint 73°F (23°C)
Visibility 0.25 mi
Heat Index78°F (26°C)
Last update 28 Aug 12:35 pm EDT
Extended Forecast for

Saint Simons Island GA

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 90. Heat index values as high as 100. South wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 90 °F

    T-storms
    Likely

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 7pm, then showers and thunderstorms likely, mainly between 7pm and 8pm. Low around 75. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 89. Calm wind becoming east 5 to 8 mph in the afternoon.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a chance of thunderstorms after 4am. Mostly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming east 5 to 9 mph in the morning.

    High: 90 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms between 2am and 5am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 91. Chance of precipitation is 30%.

    High: 91 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.

    Low: 75 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 90. Heat index values as high as 100. South wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 7pm, then showers and thunderstorms likely, mainly between 7pm and 8pm. Low around 75. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 40 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 89. Calm wind becoming east 5 to 8 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a chance of thunderstorms after 4am. Mostly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming east 5 to 9 mph in the morning.
Sunday Night
A slight chance of showers and thunderstorms between 2am and 5am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Monday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny, with a high near 91.
Tuesday Night
A 10 percent chance of showers before 8pm. Mostly clear, with a low around 75.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Simons Island GA
 31.21°N 81.36°W
Last Update:
12:16 pm EDT Aug 28, 2026
Forecast Valid:
12pm EDT Aug 28, 2026-6pm EDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation