Measurements:
°C
°F
Mustang Island
70°F
NW 7 mph
Feels like: 70°F
Precip: 0%
World Resorts USA Mustang Island Weather

Mustang Island Sea Water Temperature

Current Sea Water Temperature:
+70.6°F
Maximum Sea Water Temperature in February: 71.6°F
Minimum Sea Water Temperature in February: 52.4°F
Average water temperature in February: 61.6°F

Sea Water Temperature for the Last 10 Days:

February 21 70.6°F February 16 69.2°F
February 20 68.4°F February 15 67.8°F
February 19 69.4°F February 14 67.0°F
February 18 69.6°F February 13 67.4°F
February 17 69.4°F February 12 65.2°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 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 +28
Hawaii +72
Honolulu +72
Houston +74
Las Vegas +34
Los Angeles +40
Maui +66
Miami +74
Miami Beach +78
New York +38
San Diego +44
San Francisco +42
Sarasota +68
Tampa +70
Washington +38
24 Hours Weather Forecast
Mustang Island
Local time: 07:20
21 feb, saturday
0900 70°F
NW
2 mph
1200 74°F
SW
4 mph
1500 78°F
S
11 mph
1800 78°F
S
28 mph
2100 74°F
S
25 mph
22 feb, sunday
0000 68°F
S
30 mph
0300 62°F
S
30 mph
0600 56°F
S
26 mph