Average sea water temperature in May:
+78.9°F
| Minimum sea water temperature in May: | 84.0°F |
| Maximum sea water temperature in May: | 71.4°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 77.7°F. The highest and lowest sea temperatures during the month were 80.1°F and 75.6°F.
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| Galveston Island |
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| Galveston Island |
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| Galveston Island |
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| Galveston Island |
Monthly sea water temperature in Galveston Island, °F
Which USA resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Everglades | 84.6°F | 84.5°F |
| Key West | 84.2°F | 83.5°F |
| Key Largo | 84.1°F | 83.5°F |
| Miami | 83.2°F | 82.6°F |
| Hialeah | 82.8°F | 82.3°F |
| Cape Coral | 82.7°F | 83.4°F |
| Marco Island | 82.6°F | 83.5°F |
| Miami Beach | 82.4°F | 82.4°F |
| Naples | 82.4°F | 83.5°F |
| West Palm Beach | 81.3°F | 81.1°F |
| Fort Lauderdale | 81.3°F | 81.1°F |
| St. Petersburg | 81.0°F | 82.6°F |
| Tampa | 81.0°F | 82.7°F |
| Sarasota | 80.7°F | 82.7°F |
| Clearwater Beach | 80.5°F | 82.6°F |
| Siesta Key | 80.4°F | 82.5°F |
| Cocoa Beach | 79.7°F | 79.4°F |
| Corpus Christi | 79.0°F | 80.9°F |
| Honolulu | 78.1°F | 78.1°F |
| Hawaii | 78.0°F | 78.0°F |
Best time for vacation in Galveston Island
Galveston Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Galveston Island
Local time: 18:03
May 23, saturday
2100
72°F
NE
8 mph
8 mph
May 24, sunday
0000
75°F
SW
6 mph
6 mph
0300
77°F
W
12 mph
12 mph
0600
77°F
W
8 mph
8 mph
0900
77°F
W
11 mph
11 mph
1200
77°F
W
19 mph
19 mph
1500
79°F
W
11 mph
11 mph
1800
81°F
NW
8 mph
8 mph
