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Galveston Island Weather

Galveston Island 14 Days Forecast

23.07
thu

Day

88°F

S 17 mph

Precip.
10%

Night

79°F

N 21 mph

Precip.
16%

24.07
fri

Day

86°F

NW 14 mph

Precip.
10%

Night

84°F

N 14 mph

Precip.
8%

25.07
sat

Day

84°F

N 6 mph

Precip.
5%

Night

84°F

N 13 mph

Precip.
7%

26.07
sun

Day

86°F

N 8 mph

Precip.
6%

Night

84°F

N 16 mph

Precip.
12%

27.07
mon

Day

86°F

N 9 mph

Precip.
7%

Night

84°F

N 16 mph

Precip.
7%

28.07
tue

Day

86°F

N 13 mph

Precip.
7%

Night

84°F

N 15 mph

Precip.
8%

29.07
wed

Day

86°F

N 11 mph

Precip.
5%

Night

84°F

NE 14 mph

Precip.
8%

30.07
thu

Day

86°F

N 11 mph

Precip.
8%

Night

84°F

N 14 mph

Precip.
9%

31.07
fri

Day

86°F

N 14 mph

Precip.
6%

Night

84°F

N 17 mph

Precip.
8%

01.08
sat

Day

86°F

NE 17 mph

Precip.
7%

Night

84°F

NE 21 mph

Precip.
9%

02.08
sun

Day

86°F

NE 16 mph

Precip.
8%

Night

84°F

NE 21 mph

Precip.
7%

03.08
mon

Day

86°F

N 13 mph

Precip.
8%

Night

84°F

N 17 mph

Precip.
7%

04.08
tue

Day

86°F

N 11 mph

Precip.
10%

Night

84°F

N 16 mph

Precip.
9%

05.08
wed

Day

88°F

N 9 mph

Precip.
8%

Night

86°F

N 16 mph

Precip.
7%

sea water
temperature

Galveston Island

monthly
weather

Galveston Island

current
weather

Galveston Island

7 days
forecast

Galveston Island

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2026

2025

2024

The average sea water temperature in July of 2026 was 86.5°F. The highest and lowest sea temperatures during the month were 87.8°F and 84.9°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.