Measurements:
°C
°F
St. Augustine
54°F
S 9 mph
Feels like: 50°F
Precip: 0%
World Resorts USA St. Augustine Weather

St. Augustine Sea Water Temperature

Current Sea Water Temperature:
+59.2°F
Maximum Sea Water Temperature in January: 70.2°F
Minimum Sea Water Temperature in January: 52.2°F
Average water temperature in January: 62.7°F

Sea Water Temperature for the Last 10 Days:

January 29 59.2°F January 24 60.4°F
January 28 61.2°F January 23 60.8°F
January 27 62.8°F January 22 61.0°F
January 26 61.8°F January 21 61.4°F
January 25 61.2°F January 20 61.6°F

When is the Warmest Sea for St. Augustine?

According to our data for the last three years for St. Augustine the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for St. Augustine was 88.5°F. The maximum and minimum values were 87.4°F and 89.4°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for St. Augustine was 85.3°F. The maximum and minimum values were 82.0°F and 88.6°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for St. Augustine was 84.4°F. The maximum and minimum values were 81.8°F and 88.4°F respectively.

Best Time to Visit St. Augustine
The most sunny months:
October 15 days
April 15 days
March 14 days
The most warm months:
July 92.9 °F
August 92.6 °F
June 91.1 °F
Warmest sea temperature:
August 87.4 °F
September 86.4 °F
July 86.4 °F
The most cold months:
January 64.7 °F
December 68.2 °F
February 70.7 °F
The most rainy months:
July 5 days
September 4 days
August 4 days
The most windy months:
January 7 mph
December 6 mph
October 6 mph

St. Augustine on the Weather Map

USA Resorts:
NAME
Chicago +16
Hawaii +74
Honolulu +74
Houston +62
Las Vegas +48
Los Angeles +56
Maui +68
Miami +64
Miami Beach +70
New York +12
San Diego +58
San Francisco +50
Sarasota +58
Tampa +60
Washington +12
24 Hours Weather Forecast
St. Augustine
Local time: 11:49
29 jan, thursday
1200 54°F
S
9 mph
1500 58°F
SW
7 mph
1800 58°F
SW
7 mph
2100 50°F
W
6 mph
30 jan, friday
0000 50°F
W
5 mph
0300 52°F
NW
3 mph
0600 50°F
NE
2 mph
0900 50°F
E
6 mph