Weather WorldSt. Marks Square, GA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
St. Marks Square, GA Weather Forecast
St. Marks Square, GA Weather Forecast Date: 222 PM EDT Tue Sep 01 2026
The area/counties/county of: Coastal Glynn, including the cities of: Jekyll Island, Glynn Haven, Sea Island, St. Simons, Country Club Estate, and Dock Junction.or toggle through each period.
This Afternoon... Mostly sunny. Highs in the upper 80s. East winds 10 to 15 mph.
Tonight... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 70s. East winds 5 to 10 mph.
Wednesday... Mostly cloudy in the morning, then becoming partly sunny. A slight chance of showers and thunderstorms. Highs around 90. East winds 5 to 10 mph. Chance of rain 20%.
Wednesday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 70s. East winds 5 to 10 mph.
Thursday... Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs around 90. East winds 5 to 10 mph. Chance of rain 40%.
Thursday Night... Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 70s. Chance of rain 30%.
Friday... Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 50%.
Friday Night... Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 70s. Chance of rain 50%.
Saturday... Partly cloudy. A chance of showers and thunderstorms. Highs in the mid 90s. Lows in the mid 70s. Chance of rain 30%. Heat index values up to 110.
Saturday Night... Partly cloudy. A chance of showers and thunderstorms. Highs in the mid 90s. Lows in the mid 70s. Chance of rain 30%. Heat index values up to 110.
Sunday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 50%. Heat index values up to 105.
Sunday Night... Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 50%.
POP = Probability of Precipitation
St. Marks Square Radar Loop
Use the map search tool if you want to place a location marker on the radar map...