Current sea water temperature:
+84.6°F
| Minimum sea water temperature in September: | 86.2°F |
| Maximum sea water temperature in September: | 77.5°F |
| Average sea water temperature in September: | 82.2°F |
| more information | |
14 days
forecast
forecast
| St. Simons Island |
monthly
weather
weather
| St. Simons Island |
Sea water temperature for the last 10 days:
| September 14 | 84.6°F | September 9 | 84.6°F |
| September 13 | 84.2°F | September 8 | 86.0°F |
| September 12 | 84.7°F | September 7 | 85.6°F |
| September 11 | 84.9°F | September 6 | 85.1°F |
| September 10 | 84.6°F | September 5 | 85.1°F |
Monthly sea water temperature, °F
When is the warmest sea in St. Simons Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in St. Simons Island was noticed in August, July and September.
Monthly Sea Temperatures in St. Simons Island, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 85.2°F. The highest and lowest sea temperatures during the month were 86.9°F and 83.8°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 86.0°F. The highest and lowest sea temperatures during the month were 87.4°F and 84.2°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 80.7°F. The highest and lowest sea temperatures during the month were 83.5°F and 77.9°F.
current
weather
weather
| St. Simons Island |
weather in
September
September
| St. Simons Island |
Best time for vacation in St. Simons Island
St. Simons Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
St. Simons Island
Local time: 16:41
September 14, monday
1800
90°F
NW
6 mph
6 mph
2100
79°F
NW
4 mph
4 mph
September 15, tuesday
0000
79°F
NW
2 mph
2 mph
0300
77°F
SW
2 mph
2 mph
0600
75°F
SW
4 mph
4 mph
0900
84°F
W
7 mph
7 mph
1200
90°F
W
10 mph
10 mph
1500
90°F
W
12 mph
12 mph
