Current sea water temperature:
+60.8°F
| Minimum sea water temperature in December: | 69.4°F |
| Maximum sea water temperature in December: | 53.6°F |
| Average sea water temperature in December: | 63.2°F |
| more information | |
14 days
forecast
forecast
| Galveston Island |
monthly
weather
weather
| Galveston Island |
Sea water temperature for the last 10 days:
| December 21 | 60.8°F | December 16 | 60.3°F |
| December 20 | 59.7°F | December 15 | 62.1°F |
| December 19 | 60.3°F | December 14 | 63.0°F |
| December 18 | 60.4°F | December 13 | 62.1°F |
| December 17 | 60.3°F | December 12 | 60.3°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
December
December
| 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: 05:35
December 21, sunday
0600
66°F
NE
9 mph
9 mph
0900
64°F
NE
7 mph
7 mph
1200
64°F
NE
6 mph
6 mph
1500
64°F
N
7 mph
7 mph
1800
64°F
N
4 mph
4 mph
2100
64°F
NW
5 mph
5 mph
December 22, monday
0000
64°F
N
9 mph
9 mph
0300
64°F
N
7 mph
7 mph
