World Resorts USA St. Simons Island Weather

St. Simons Island weather in March

Weather in St. Simons Island: March

Average day temperature: 71.4°F
Average night temperature: 59.2°F
Sea water temperature: 62.8°F
Number of sunny days: 14 days
Day length: 11.5 - 12.5 hours
Number of rainy days: 3 days
Precipitation totals: 1.3 in.

Air temperature in March, °F

Show year:
2025
2024
2023

The highest day temperature during March of 2025 was 82°F. At the same time the lowest night temperature was 44°F. Daily and nightly averages during March were 68.9°F and 56.4°F.

Sea water temperature in St. Simons Island in March, °F

Show year:
2025
2024
2023

The average sea water temperature in March of 2025 was 60.6°F. The highest and lowest sea temperatures during the month were 66.9°F and 56.8°F.

Sunny, partly cloudy and cloudy days

Mostly all days in March are sunny but cloudy days are also possible.

Precipitation total in March, in.

Precipitation total value in St. Simons Island in March is 1.3 in. Other months of the year show relatively similar values.

Wind speed in March, mph

The average wind speed value in March is 6.4 mph

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in March is: 7.4.

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

St. Simons Island
+52°F
NW 3 mph
Feels like: +52°F
Precip.: 83%
Places in USA:
Name
°F
+30°F
+75°F
+75°F
+45°F
+55°F
+70°F
+77°F
+70°F
+23°F
+57°F
+48°F
+63°F
+63°F
+46°F
+5°F
24 Hours Forecast
St. Simons Island
Local time: 01:04
December 05, friday
0300
57°F
NW
6 mph
0600
59°F
N
6 mph
0900
61°F
NE
4 mph
1200
64°F
NE
5 mph
1500
63°F
NE
4 mph
1800
57°F
S
11 mph
2100
55°F
S
7 mph
December 06, saturday
0000
55°F
SE
4 mph
Units of measurement: °C / °F