Port Isabel water temp
This data the coastal Port Isabel ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Current ocean temperature in Port Isabel
Water temperature in Port Isabel today is 86.2°F. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Mexico near Port Isabel was recorded in 2023 and was 86.5°F, and the coldest was recorded in 2017 at 82.2°F. Sea water temperature in Port Isabel is expected to drop to 84°F in the next 10 days. September average water temperature in Port Isabel is 84°F, the minimum temperature is 80.1°F, and the maximum is 86.9°F.
The swimming season in Port Isabel lasts from February to December. During those months, Port Isabel water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Port Isabel in winter reaches 66.7°F, in spring 73°F, in summer the average temperature rises to 82.8°F, and in autumn it is 80.2°F.
Port Isabel water temperature now
| September 5, 2025 |
|---|
| today temp |
| 86.2°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 85.3°F |
The ocean salinity in Port Isabel is 34.60‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Port Isabel for today
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Port Isabel. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Port Isabel. Data in table shown for September 6, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 1' 2" | 1' 6" | 1' 7" | 1' 5" |
| 0.35 m | 0.45 m | 0.49 m | 0.44 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 6" | 1' 6" | 1' 6" | 1' 7" |
| 0.45 m | 0.46 m | 0.46 m | 0.47 m |
Surf report in Port Isabel
Port Isabel weather forecast
Current temperature and weather
Data in a table show Port Isabel temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Port Isabel.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  | | |
| 83.5°F | 82.8°F | 82.2°F | 83.3°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | |  |
| 85.3°F | 85.6°F | 84.2°F | 84°F |
You may also be interested in other sections of our site for Port Isabel: Sunrise and Sunset, Tides
Port Isabel water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Port Isabel. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Port Isabel on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 66°F | 56.7°F | 76.3°F | cold |
| Ocean water temperature in Port Isabel in January | ||||
| February | 65.1°F | 55.4°F | 71.1°F | cold |
| Ocean water temperature in Port Isabel in February | ||||
| March | 67.8°F | 59.2°F | 75.2°F | cold |
| Ocean water temperature in Port Isabel in March | ||||
| April | 73°F | 65.7°F | 78.8°F | warm |
| Ocean water temperature in Port Isabel in April | ||||
| May | 78.1°F | 70.9°F | 83.8°F | hot |
| Ocean water temperature in Port Isabel in May | ||||
| June | 82°F | 78.3°F | 86.4°F | hot |
| Ocean water temperature in Port Isabel in June | ||||
| July | 82.8°F | 79.7°F | 86°F | hot |
| Ocean water temperature in Port Isabel in July | ||||
| August | 83.7°F | 80.8°F | 87.1°F | hot |
| Ocean water temperature in Port Isabel in August | ||||
| September | 84°F | 80.1°F | 86.9°F | hot |
| Ocean water temperature in Port Isabel in September | ||||
| October | 81.3°F | 75.4°F | 86.9°F | hot |
| Ocean water temperature in Port Isabel in October | ||||
| November | 75.2°F | 65.7°F | 81.5°F | warm |
| Ocean water temperature in Port Isabel in November | ||||
| December | 69.3°F | 61°F | 76.3°F | warm |
| Ocean water temperature in Port Isabel in December | ||||
Chart monthly average water temperature in Port Isabel
