Measurements:
°C
°F
Mustang Island
56°F
N 6 mph
Feels like: 56°F
Precip: 0%
World Resorts USA Mustang Island Weather

Mustang Island Sea Water Temperature

Current Sea Water Temperature:
+59.4°F
Maximum Sea Water Temperature in January: 76.0°F
Minimum Sea Water Temperature in January: 53.4°F
Average water temperature in January: 63.3°F

Sea Water Temperature for the Last 10 Days:

January 29 59.4°F January 24 64.0°F
January 28 61.8°F January 23 64.0°F
January 27 61.8°F January 22 63.4°F
January 26 64.8°F January 21 62.6°F
January 25 66.0°F January 20 64.0°F

When is the Warmest Sea for Mustang Island?

According to our data for the last three years for Mustang Island the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Mustang Island was 90.3°F. The maximum and minimum values were 88.4°F and 91.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Mustang Island was 90.0°F. The maximum and minimum values were 88.0°F and 92.2°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Mustang Island was 88.0°F. The maximum and minimum values were 85.6°F and 90.0°F respectively.

Best Time to Visit Mustang Island
The most sunny months:
October 17 days
August 16 days
July 14 days
The most warm months:
August 94.0 °F
July 92.6 °F
June 91.5 °F
Warmest sea temperature:
August 90.5 °F
September 89.3 °F
July 88.9 °F
The most cold months:
January 63.8 °F
February 63.9 °F
December 68.8 °F
The most rainy months:
July 3 days
September 2 days
May 2 days
The most windy months:
April 14 mph
May 13 mph
June 13 mph

Mustang Island on the Weather Map

USA Resorts:
NAME
Chicago 0
Hawaii +74
Honolulu +74
Houston +38
Las Vegas +48
Los Angeles +56
Maui +68
Miami +64
Miami Beach +70
New York +12
San Diego +60
San Francisco +50
Sarasota +58
Tampa +58
Washington +12
24 Hours Weather Forecast
Mustang Island
Local time: 09:55
29 jan, thursday
1200 68°F
N
12 mph
1500 72°F
N
10 mph
1800 64°F
N
6 mph
2100 60°F
N
8 mph
30 jan, friday
0000 58°F
SE
9 mph
0300 56°F
S
21 mph
0600 46°F
S
21 mph
0900 38°F
S
20 mph