Measurements:
°C
°F
Mustang Island
88°F
N 12 mph
Feels like: 100°F
Precip: 18%
World Resorts USA Mustang Island Weather

Mustang Island Sea Water Temperature

Current Sea Water Temperature:
+90.8°F
Maximum Sea Water Temperature in September: 92.2°F
Minimum Sea Water Temperature in September: 83.4°F
Average water temperature in September: 89.3°F

Sea Water Temperature for the Last 10 Days:

September 15 90.8°F September 10 91.0°F
September 14 90.8°F September 09 90.6°F
September 13 90.2°F September 08 90.6°F
September 12 90.4°F September 07 90.8°F
September 11 90.8°F September 06 90.0°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: 2026 2025 2024

The average sea surface temperature in August 2026 for Mustang Island was 88.8°F. The maximum and minimum values were 87.0°F and 90.4°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Mustang Island was 90.4°F. The maximum and minimum values were 89.6°F and 91.0°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Mustang Island was 88.3°F. The maximum and minimum values were 85.8°F and 90.2°F respectively.

Best Time to Visit Mustang Island
The most sunny months:
October 17 days
August 17 days
July 16 days
The most warm months:
August 93.7 °F
July 92.6 °F
June 91.3 °F
Warmest sea temperature:
August 90.2 °F
September 89.3 °F
July 88.8 °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
Boston +64
Chicago +66
Hawaii +80
Las Vegas +80
Los Angeles +74
Maui +66
Miami +92
Myrtle Beach +86
New York +72
Panama City Beach +90
San Diego +72
San Francisco +60
Santa Monica +72
Sarasota +94
Washington +76
24 Hours Weather Forecast
Mustang Island
Local time: 09:37
15 sep, tuesday
1200 88°F
N
11 mph
1500 90°F
NW
14 mph
1800 90°F
NW
14 mph
2100 88°F
NW
16 mph
16 sep, wednesday
0000 88°F
NW
16 mph
0300 88°F
NW
12 mph
0600 88°F
NW
8 mph
0900 88°F
NW
7 mph