Measurements:
°C
°F
CURRENT WEATHER
09:36
Mustang Island
88°F
N 12 mph
Feels like: 100°F
Precip: 18%
World Resorts USA Mustang Island Weather

7 Day Weather Forecast

09.15
tue
DAY
88°F
N 11 mph
precip
8%
NIGHT
88°F
NW 16 mph
precip
20%
09.16
wed
DAY
88°F
W 10 mph
precip
63%
NIGHT
88°F
W 11 mph
precip
22%
09.17
thu
DAY
88°F
W 6 mph
precip
65%
NIGHT
90°F
W 16 mph
precip
26%
09.18
fri
DAY
90°F
W 12 mph
precip
5%
NIGHT
88°F
NW 17 mph
precip
30%
09.19
sat
DAY
86°F
NW 5 mph
precip
4%
NIGHT
88°F
NW 12 mph
precip
6%
09.20
sun
DAY
84°F
N 4 mph
precip
18%
NIGHT
88°F
N 16 mph
precip
15%
09.21
mon
DAY
86°F
N 9 mph
precip
45%
NIGHT
82°F
NE 5 mph
precip
30%

Mustang Island Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Mustang Island was 30.2°F. The maximum and minimum values were 29.8°F and 30.5°F respectively.

Mustang Island on the Weather Map

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
more details