World Resorts USA Mustang Island Weather

Mustang Island sea water temperature

Current sea water temperature:
+68.5°F
Minimum sea water temperature in January: 73.4°F
Maximum sea water temperature in January: 53.1°F
Average sea water temperature in January: 61.8°F

Sea water temperature for the last 10 days:

January 13 68.5°F January 8 68.9°F
January 12 68.9°F January 7 69.1°F
January 11 69.1°F January 6 66.7°F
January 10 68.9°F January 5 68.5°F
January 9 68.4°F January 4 66.7°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 62.1 °F
February 62.5 °F
December 66.9 °F
Rainiest months:
July 3 days
September 2 days
May 2 days
Windiest months:
April 13.9 mph
May 13.6 mph
June 13.2 mph

Mustang Island on a weather map

Mustang Island
+54°F
SW 6 mph
Feels like: +52°F
Precip.: 0%
Places in USA:
Name
°F
+30°F
+68°F
+68°F
+48°F
+57°F
+66°F
+75°F
+64°F
+30°F
+55°F
+46°F
+57°F
+55°F
+46°F
+34°F
24 Hours Forecast
Mustang Island
Local time: 03:32
January 13, tuesday
0600
50°F
SW
7 mph
0900
52°F
SW
5 mph
1200
55°F
S
4 mph
1500
57°F
NW
3 mph
1800
59°F
NW
9 mph
2100
57°F
N
9 mph
January 14, wednesday
0000
55°F
NE
9 mph
0300
52°F
NE
10 mph
Units of measurement: °C / °F