St. Simons, GA Weather & Growing Conditions
Overnight
78°F
Partly Cloudy
Partly cloudy, with a low around 78. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 78°F | Partly Cloudy | 6 mph S | 12% |
| Saturday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 13 mph NE | 16% |
| Saturday Night | 77°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 3 to 13 mph SE | 30% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 3 to 9 mph NE | 37% |
| Sunday Night | 76°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 7 mph E | 16% |
| Monday | 86°F | Chance Showers And Thunderstorms | 2 to 9 mph NE | 30% |
| Monday Night | 76°F | Chance Showers And Thunderstorms | 2 to 7 mph E | 51% |
| Tuesday | 86°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 12 mph NE | 62% |
| Tuesday Night | 75°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 8 mph NE | 62% |
| Wednesday | 85°F | Showers And Thunderstorms Likely | 7 to 18 mph NE | 58% |
| Wednesday Night | 73°F | Showers And Thunderstorms Likely | 15 to 18 mph NE | 58% |
| Thursday | 84°F | Chance Showers And Thunderstorms | 18 to 24 mph NE | 30% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 14 to 22 mph NE | 25% |
| Friday | 83°F | Chance Rain Showers | 16 to 22 mph NE | 33% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Simons, GA
Last spring frost
Feb 9
First fall frost
Dec 26
Growing season
312 days
Hardiness zone
9a
Explore more for St. Simons, GA: full frost dates · planting calendar · Georgia frost dates
Climate data from the nearest NOAA station, Brunswick Malcolm Mckinnon Ap, Ga (6.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.