Measurements:
°C
°F
Mustang Island
48°F
S 14 mph
Feels like: 44°F
Precip: 0%
World Resorts USA Mustang Island Weather

Mustang Island Sea Water Temperature

Current Sea Water Temperature:
+72.8°F
Maximum Sea Water Temperature in December: 76.0°F
Minimum Sea Water Temperature in December: 57.2°F
Average water temperature in December: 68.1°F

Sea Water Temperature for the Last 10 Days:

December 05 72.8°F November 30 76.2°F
December 04 73.0°F November 29 77.2°F
December 03 74.4°F November 28 79.0°F
December 02 75.0°F November 27 81.0°F
December 01 75.2°F November 26 81.4°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 63.5 °F
February 63.9 °F
December 68.7 °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 -2
Hawaii +78
Honolulu +78
Houston +44
Las Vegas +40
Los Angeles +52
Maui +72
Miami +72
Miami Beach +80
New York +20
San Diego +54
San Francisco +46
Sarasota +62
Tampa +62
Washington +28
24 Hours Weather Forecast
Mustang Island
Local time: 03:25
05 dec, friday
0600 48°F
S
13 mph
0900 48°F
S
11 mph
1200 54°F
S
7 mph
1500 60°F
SW
5 mph
1800 60°F
SW
6 mph
2100 56°F
SW
7 mph
06 dec, saturday
0000 58°F
SW
6 mph
0300 58°F
S
9 mph