Current sea water temperature:
+79.5°F
| Minimum sea water temperature in May: | 84.0°F |
| Maximum sea water temperature in May: | 71.4°F |
| Average sea water temperature in May: | 78.9°F |
| more information | |
14 days
forecast
forecast
| Galveston Island |
monthly
weather
weather
| Galveston Island |
Sea water temperature for the last 10 days:
| May 23 | 79.5°F | May 18 | 79.0°F |
| May 22 | 79.2°F | May 17 | 78.8°F |
| May 21 | 80.1°F | May 16 | 78.1°F |
| May 20 | 79.9°F | May 15 | 79.5°F |
| May 19 | 79.5°F | May 14 | 78.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Galveston Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in Galveston Island was noticed in August, July and September.
Monthly Sea Temperatures in Galveston Island, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 87.8°F. The highest and lowest sea temperatures during the month were 89.1°F and 86.4°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 86.4°F. The highest and lowest sea temperatures during the month were 88.0°F and 85.1°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 85.5°F. The highest and lowest sea temperatures during the month were 87.4°F and 83.7°F.
current
weather
weather
| Galveston Island |
weather in
May
May
| Galveston Island |
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: 17:16
May 23, saturday
1800
75°F
N
13 mph
13 mph
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
