Port Isabel Water Temperature
(Today) 2025
The water will feel tepid. Swimming will be tolerable without a wetsuit, although it will take a little getting used to. If you intend to stay in the water for a while a 3/2mm wetsuit will be ideal.
*Live data from Port Isabel, TX: 22.8°C / 73°F
Current weather
(overcast clouds)
The measurements for the water temperature in Port Isabel, Texas are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.
Water temp by month
Monthly average max / min water temperatures
The graph below shows the range of monthly Port Isabel water temperature derived from many years of historical sea surface temperature data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 17.1 | 17 | 16.7 | 19.7 | 23.2 | 27.1 | 28.1 | 28.5 | 28 | 25.1 | 22.3 | 18.3 |
| Max °C | 20.8 | 19.5 | 22.1 | 26 | 27.9 | 29.5 | 29.9 | 30.8 | 30.6 | 29.7 | 25.9 | 23.8 |
| Min °F | 64.2 | 63.6 | 64.2 | 69.9 | 75.6 | 81.7 | 83.3 | 84.2 | 83.4 | 79 | 73.6 | 67.1 |
| Max °F | 67.9 | 66.1 | 69.6 | 76.2 | 80.3 | 84.1 | 85.1 | 86.5 | 86 | 83.6 | 77.2 | 72.6 |
The warmest water temperature is in August with an average around 85.3°F / 29.6°C. The coldest month is February with an average water temperature of 64.8°F / 18.2°C.
