Measurements:
°C
°F
CURRENT WEATHER
09:37
Galveston Island
90°F
N 6 mph
Feels like: 100°F
Precip: 7%
World Resorts USA Galveston Island Weather

7 Day Weather Forecast

09.15
tue
DAY
92°F
NW 7 mph
precip
6%
NIGHT
90°F
NW 14 mph
precip
9%
09.16
wed
DAY
88°F
W 13 mph
precip
19%
NIGHT
90°F
NW 17 mph
precip
20%
09.17
thu
DAY
90°F
W 18 mph
precip
22%
NIGHT
88°F
NW 14 mph
precip
12%
09.18
fri
DAY
88°F
SW 7 mph
precip
4%
NIGHT
88°F
NW 14 mph
precip
4%
09.19
sat
DAY
88°F
NW 6 mph
precip
4%
NIGHT
86°F
NW 12 mph
precip
11%
09.20
sun
DAY
86°F
SW 4 mph
precip
17%
NIGHT
88°F
NW 12 mph
precip
6%
09.21
mon
DAY
86°F
N 2 mph
precip
16%
NIGHT
86°F
NE 11 mph
precip
68%

Galveston Island Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Galveston Island was 30.7°F. The maximum and minimum values were 30.4°F and 31.0°F respectively.

Galveston Island on the Weather Map

Best Time to Visit Galveston Island
The most sunny months:
October 18 days
August 15 days
September 14 days
The most warm months:
August 93.8 °F
July 92.9 °F
June 91.6 °F
Warmest sea temperature:
August 91.6 °F
July 90.2 °F
September 89.0 °F
The most cold months:
January 59.6 °F
February 61.8 °F
December 64.9 °F
The most rainy months:
November 3 days
July 3 days
May 3 days
The most windy months:
April 12 mph
January 11 mph
May 11 mph
more details