Measurements:
°C
°F
Mustang Island
84°F
N 19 mph
Feels like: 92°F
Precip: 11%
World Resorts USA Mustang Island Weather

Mustang Island Sea Water Temperature

Current Sea Water Temperature:
+89.0°F
Maximum Sea Water Temperature in June: 92.2°F
Minimum Sea Water Temperature in June: 83.8°F
Average water temperature in June: 88.2°F

Sea Water Temperature for the Last 10 Days:

June 24 89.0°F June 19 88.8°F
June 23 88.6°F June 18 89.0°F
June 22 88.8°F June 17 88.0°F
June 21 88.2°F June 16 88.8°F
June 20 87.4°F June 15 89.2°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 +66
Hawaii +80
Honolulu +80
Houston +82
Las Vegas +96
Los Angeles +66
Maui +74
Miami +80
Miami Beach +88
Myrtle Beach +78
New York +70
San Diego +68
San Francisco +58
Sarasota +84
Tampa +84
24 Hours Weather Forecast
Mustang Island
Local time: 23:24
25 jun, thursday
0000 84°F
N
19 mph
0300 84°F
N
16 mph
0600 84°F
N
16 mph
0900 88°F
N
14 mph
1200 88°F
NW
15 mph
1500 88°F
NW
17 mph
1800 86°F
NW
17 mph
2100 86°F
NW
19 mph