World sea water temperatures

Water temperature in Port Isabel (TX) in May

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Is it warm enough to swim in Port Isabel in May? Average water temperature in Port Isabel in May is 78.1°F and therefore suitable for comfortable swimming. The warmest sea in Port Isabel in May is 83.8°F, and the coldest is 70.9°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Port Isabel

Changes water temperature in Port Isabel in May 2025, 2024

To get an accurate forecast for the water temperature in Port Isabel for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Port Isabel, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of May.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
May 177.9°F76.6°F70.9°F77.9°F
May 277.5°F77°F70.9°F78.1°F
May 377.7°F77°F71.1°F78.3°F
May 477.4°F76.6°F71.4°F78.3°F
May 578.1°F77.4°F71.1°F78.6°F
May 679°F78.1°F72.5°F79.7°F
May 778.4°F78.6°F73°F78.8°F
May 878.4°F78.6°F73°F79.3°F
May 978.4°F81°F73.6°F81°F
May 1079.3°F81.7°F74.5°F81.7°F
May 1177.5°F81°F74.7°F81°F
May 1279°F81.1°F74.7°F81.1°F
May 1378.6°F81.3°F74.1°F81.3°F
May 1479.3°F82.6°F73°F82.6°F
May 1579.3°F81.1°F72.7°F81.1°F
Day 2025 2024 Min Max
May 1679.2°F82°F72.9°F82°F
May 1779.7°F81.1°F73°F81.1°F
May 1879.7°F83.1°F73.8°F83.1°F
May 1980.4°F82°F74.5°F82°F
May 2080.6°F82.9°F75°F82.9°F
May 2180.6°F82.4°F75.9°F82.4°F
May 2281.3°F83.1°F76.1°F83.1°F
May 2382.6°F83.5°F76.8°F83.5°F
May 2482.6°F82.6°F77°F82.6°F
May 2581.5°F82.6°F76.5°F82.6°F
May 2680.4°F82°F76.8°F82°F
May 2781.3°F83.7°F77.2°F83.7°F
May 2882.2°F83.8°F77.5°F83.8°F
May 2980.6°F83.3°F77.7°F83.3°F
May 3081°F82.8°F78.4°F82.8°F
May 3181°F82.6°F78.4°F82.6°F
Port Isabel water temp chart in May

Average water temperature in Port Isabel in May over a decade

20162017201820192020
79.2°F78.4°F78.4°F78.3°F79.3°F
20212022202320242025
78.4°F78.4°F79°F81.1°F79.7°F

Port Isabel sea state in May

Chart comparing the height of waves in Port Isabel in May over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Port Isabel in May

Port Isabel water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in May?

Want to know where the water temperature in May is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in May. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
South Padre Island77.9°F70.7°F82.8°F
Boca Chica Beach77.9°F70.9°F82.8°F
Brownsville77.9°F70.7°F82.8°F
Playa Bagdad78.1°F71.6°F83.3°F
Matamoros78.3°F71.8°F83.7°F
Arroyo City79.3°F71.2°F87.4°F
Port Mansfield79°F71.4°F86.2°F
Laguna Madre78.8°F71.8°F87.6°F
Padre Island77.9°F71.1°F84.7°F
North Padre Island77.9°F70.9°F84.6°F

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Port Isabel is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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