World Resorts USA Mustang Island Weather

Mustang Island sea water temperature

Current sea water temperature:
+77.4°F
Minimum sea water temperature in April: 78.1°F
Maximum sea water temperature in April: 67.6°F
Average sea water temperature in April: 73.3°F

Sea water temperature for the last 10 days:

April 29 77.4°F April 24 73.8°F
April 28 77.2°F April 23 74.5°F
April 27 77.0°F April 22 73.6°F
April 26 75.9°F April 21 75.0°F
April 25 75.9°F April 20 75.7°F

When is the warmest sea in Mustang Island?

Based on the data about daily sea water temperature for the last three years the warmest sea in Mustang Island was noticed in August, September and July.

Monthly Sea Temperatures in Mustang Island, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 86.3°F. The highest and lowest sea temperatures during the month were 87.4°F and 84.6°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 86.0°F. The highest and lowest sea temperatures during the month were 88.0°F and 84.2°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 84.2°F. The highest and lowest sea temperatures during the month were 86.0°F and 82.0°F.

Best time for vacation in Mustang Island

Sunniest months:
October 17 days
August 16 days
July 14 days
Warmest months:
August 89.6 °F
July 88.3 °F
June 87.4 °F
Warmest sea temp:
August 86.4 °F
September 85.3 °F
July 85.0 °F
Coldest months:
January 62.3 °F
February 63.5 °F
December 66.9 °F
Rainiest months:
July 3 days
September 2 days
May 2 days
Windiest months:
April 14.2 mph
May 13.6 mph
June 13.2 mph

Mustang Island on a weather map

Mustang Island
+77°F
NW 16 mph
Feels like: +81°F
Precip.: 0%
Places in USA:
Name
°F
+55°F
+73°F
+73°F
+57°F
+52°F
+79°F
+79°F
+66°F
+54°F
+54°F
+50°F
+77°F
+75°F
+77°F
+54°F
24 Hours Forecast
Mustang Island
Local time: 07:35
April 29, wednesday
0900
77°F
N
16 mph
1200
81°F
NW
15 mph
1500
81°F
NW
14 mph
1800
79°F
NW
15 mph
2100
77°F
NW
12 mph
April 30, thursday
0000
77°F
NW
13 mph
0300
77°F
NW
11 mph
0600
77°F
NW
10 mph
Units of measurement: °C / °F