St. Simons, GA Weather & Growing Conditions
Overnight
73°F
Slight Chance Rain Showers
A slight chance of rain showers between 2am and 3am. Partly cloudy. Low around 73, with temperatures rising to around 74 overnight. Wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Slight Chance Rain Showers | 0 mph | 16% |
| Sunday | 88°F | Chance Showers And Thunderstorms | 1 to 7 mph NE | 40% |
| Sunday Night | 73°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph E | 15% |
| Monday | 88°F | Chance Showers And Thunderstorms | 0 to 8 mph NE | 31% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 0 to 6 mph E | 32% |
| Tuesday | 87°F | Showers And Thunderstorms Likely | 0 to 9 mph NE | 62% |
| Tuesday Night | 74°F | Chance Showers And Thunderstorms | 1 to 6 mph NE | 47% |
| Wednesday | 86°F | Showers And Thunderstorms Likely | 5 to 17 mph NE | 59% |
| Wednesday Night | 72°F | Showers And Thunderstorms Likely | 8 to 16 mph NE | 59% |
| Thursday | 84°F | Chance Showers And Thunderstorms | 17 mph NE | 30% |
| Thursday Night | 69°F | Slight Chance Showers And Thunderstorms | 8 to 14 mph NE | 24% |
| Friday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 14 mph NE | 18% |
| Friday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 10 mph NE | 18% |
| Saturday | 83°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 7 to 15 mph NE | 23% |
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 (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.