See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
28°
Partly Cloudy
Feels Like: 33°
Min: 28°
Max: 29°
The next few hours will be mostly clear, with today reaching 29°C and dropping to 27°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:14
Sunrise
19:25
Sunset
Moon
Waxing Crescent
11:36
Moonrise
21:22
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
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Humidity
Weather in Saint Simons Island today, September 15, 2026
Saint Simons Island looks damp on September 15, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Morning plans should assume damp conditions, as rain chances climb toward 76% around 09:00. Cloud cover is also at its densest near 11:00 at roughly 53%.
The temperature range runs from about 28°C up to 29°C. Relative humidity sits between 73% and 84%, reaching its peak around 20:00. Winds stay light, near 9.6 km/h by 17:00, so the day feels still more than breezy.
Afternoon showers stay in play, peaking near 88% around 18:00. Skies remain cluttered, with cover about 80% by 20:00. Horizontal visibility sits around 15.4 km, briefly nearer 10.3 km. The sun rises at 07:14 and sets at 19:25, for a total of 12 hours 10 minutes of sunlight today.
In short, treat September 15, 2026 in Saint Simons Island as a damp day: pack covers, watch the wetter hours, and expect a high near 29°C.
Frequently asked questions about weather in Saint Simons Island
How warm does it get in Saint Simons Island?
The warmest month in Saint Simons Island is July, with average high temperatures of 29°C. The average temperature during this period is around 28°C.
How cold does it get in Saint Simons Island?
The coldest month in Saint Simons Island is January, with average low temperatures of 10°C. The average temperature during this period is around 12°C.
What is the wettest time of year in Saint Simons Island?
The wettest month in Saint Simons Island is August, with an average of 177mm of precipitation.
What is the driest time of year in Saint Simons Island?
The driest month in Saint Simons Island is April, with an average of 68mm of precipitation.
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