Average sea water temperature in September:
+81.6°F
| Minimum sea water temperature in September: | 87.3°F |
| Maximum sea water temperature in September: | 76.5°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 79.8°F. The highest and lowest sea temperatures during the month were 81.5°F and 77.2°F.
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| Hilton Head Island |
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| Hilton Head Island |
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| Hilton Head Island |
14 days
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| Hilton Head Island |
Monthly sea water temperature in Hilton Head Island, °F
Which USA resorts have warmest sea in September?
| Place name | September 2025 | September 2024 |
|---|---|---|
| Key West | 86.9°F | 87.4°F |
| Islamorada | 86.7°F | 87.3°F |
| Key Largo | 86.6°F | 87.1°F |
| Fort Lauderdale | 86.4°F | 86.4°F |
| West Palm Beach | 86.2°F | 86.4°F |
| Everglades | 86.2°F | 87.0°F |
| Miami Beach | 86.1°F | 86.3°F |
| Naples | 86.1°F | 87.2°F |
| Marco Island | 86.0°F | 87.2°F |
| South Padre Island | 86.0°F | 85.8°F |
| Corpus Christi | 85.8°F | 84.7°F |
| Miami | 85.8°F | 86.0°F |
| Sanibel Island | 85.7°F | 87.0°F |
| Galveston Island | 85.5°F | 84.4°F |
| Galveston | 85.5°F | 83.7°F |
| Cape Coral | 85.2°F | 86.5°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 |
Best time for vacation in Hilton Head Island
Hilton Head Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Hilton Head Island
Local time: 17:44
December 25, thursday
1800
68°F
NE
6 mph
6 mph
2100
59°F
NE
7 mph
7 mph
December 26, friday
0000
59°F
E
7 mph
7 mph
0300
57°F
E
7 mph
7 mph
0600
55°F
SE
5 mph
5 mph
0900
55°F
NE
6 mph
6 mph
1200
55°F
E
8 mph
8 mph
1500
57°F
NE
8 mph
8 mph
