Average sea water temperature in September:
+82.8°F
| Minimum sea water temperature in September: | 85.6°F |
| Maximum sea water temperature in September: | 78.8°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 81.8°F. The highest and lowest sea temperatures during the month were 84.7°F and 78.8°F.
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| St. Augustine |
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| St. Augustine |
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| St. Augustine |
14 days
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| St. Augustine |
Monthly sea water temperature in St. Augustine, °F
Which USA resorts have warmest sea in September?
| Place name | September 2025 | September 2024 |
|---|---|---|
| Key West | 86.9°F | 87.4°F |
| Fort Lauderdale | 86.4°F | 86.4°F |
| Miami Beach | 86.1°F | 86.3°F |
| Naples | 86.1°F | 87.2°F |
| Corpus Christi | 85.8°F | 84.7°F |
| Miami | 85.8°F | 86.0°F |
| Houston | 84.9°F | 83.4°F |
| Siesta Key | 84.9°F | 86.8°F |
| Sarasota | 84.8°F | 86.7°F |
| Cocoa Beach | 84.6°F | 85.2°F |
| Tampa | 84.3°F | 86.0°F |
| New Orleans | 84.3°F | 82.9°F |
| St. Petersburg | 84.1°F | 86.1°F |
| Clearwater Beach | 84.0°F | 86.2°F |
| Panama City Beach | 83.4°F | 84.8°F |
| Destin | 83.1°F | 84.5°F |
| Orlando | 82.8°F | 83.6°F |
| Daytona Beach | 82.7°F | 83.2°F |
| St. Augustine | 81.8°F | 82.7°F |
| Kauai | 81.5°F | 79.4°F |
Best time for vacation in St. Augustine
St. Augustine on a weather map
Places in USA:
Name
°F
24 Hours Forecast
St. Augustine
Local time: 20:31
June 28, sunday
2100
81°F
N
11 mph
11 mph
June 29, monday
0000
79°F
N
10 mph
10 mph
0300
77°F
NE
8 mph
8 mph
0600
77°F
E
7 mph
7 mph
0900
84°F
E
7 mph
7 mph
1200
93°F
S
2 mph
2 mph
1500
91°F
W
8 mph
8 mph
1800
86°F
N
5 mph
5 mph
