Measurements:
°C
°F
Mustang Island
74°F
NW 12 mph
Feels like: 74°F
Precip: 0%
World Resorts USA Mustang Island Weather

Mustang Island Sea Water Temperature

Current Sea Water Temperature:
+74.6°F
Maximum Sea Water Temperature in March: 78.0°F
Minimum Sea Water Temperature in March: 57.0°F
Average water temperature in March: 68.3°F

Sea Water Temperature for the Last 10 Days:

March 13 74.6°F March 08 74.4°F
March 12 77.4°F March 07 73.6°F
March 11 74.2°F March 06 73.0°F
March 10 74.8°F March 05 73.0°F
March 09 74.6°F March 04 72.0°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 63.7 °F
February 65.0 °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 +44
Hawaii +76
Honolulu +76
Houston +78
Las Vegas +96
Los Angeles +100
Maui +70
Miami +80
Miami Beach +82
New York +42
San Diego +94
San Francisco +74
Sarasota +76
Tampa +82
Washington +60
24 Hours Weather Forecast
Mustang Island
Local time: 17:23
13 mar, friday
1800 74°F
NW
12 mph
2100 70°F
NW
14 mph
14 mar, saturday
0000 68°F
NW
17 mph
0300 68°F
N
16 mph
0600 68°F
N
14 mph
0900 68°F
N
13 mph
1200 70°F
NW
14 mph
1500 70°F
NW
14 mph