World Resorts USA St. Simons Island Weather

St. Simons Island 7 Days Forecast

17.12
wed
Day
63°F
S 4 mph
Precip.
0%
Night
57°F
W 6 mph
Precip.
0%
18.12
thu
Day
63°F
N 5 mph
Precip.
0%
Night
64°F
NE 9 mph
Precip.
0%
19.12
fri
Day
68°F
E 13 mph
Precip.
0%
Night
52°F
SE 7 mph
Precip.
0%
20.12
sat
Day
57°F
SW 2 mph
Precip.
0%
Night
52°F
N 3 mph
Precip.
0%
21.12
sun
Day
61°F
SE 5 mph
Precip.
0%
Night
55°F
NE 6 mph
Precip.
0%
22.12
mon
Day
57°F
SW 18 mph
Precip.
0%
Night
54°F
SW 13 mph
Precip.
0%
23.12
tue
Day
59°F
SW 11 mph
Precip.
0%
Night
55°F
SW 3 mph
Precip.
0%

Sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 59.6°F. The highest and lowest sea temperatures during the month were 64.0°F and 53.6°F.

Air temperature in St. Simons Island, °F

Precipitation total in St. Simons Island, in.

* Charts above show average data for the last 3 years.

Best time for vacation in St. Simons Island

Sunniest months:
October 15 days
January 14 days
March 14 days
Warmest months:
July 88.3 °F
August 86.9 °F
June 86.1 °F
Warmest sea temp:
August 85.1 °F
July 84.6 °F
September 82.0 °F
Coldest months:
January 59.8 °F
December 62.7 °F
February 64.8 °F
Rainiest months:
August 5 days
July 5 days
September 4 days
Windiest months:
December 6.7 mph
October 6.7 mph
January 6.7 mph

St. Simons Island on a weather map

Current weather
09:43
St. Simons Island
+50°F
S 5 mph
Feels like: +48°F
Precip.: 0%
Places in USA:
Name
°F
Washington
+30°F
Hawaii
+75°F
Honolulu
+75°F
Las Vegas
+46°F
Los Angeles
+54°F
Miami
+72°F
Miami Beach
+75°F
Maui
+70°F
New York
+30°F
San Diego
+50°F
San Francisco
+55°F
Sarasota
+59°F
Tampa
+59°F
Houston
+61°F
Chicago
+32°F
all places
24 Hours Forecast
St. Simons Island
Local time: 09:43
December 17, wednesday
1200
63°F
S
4 mph
1500
66°F
SW
6 mph
1800
63°F
SW
6 mph
2100
57°F
SW
6 mph
December 18, thursday
0000
57°F
W
6 mph
0300
57°F
NW
4 mph
0600
57°F
NW
2 mph
0900
59°F
NW
5 mph
Units of measurement: °C / °F