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Water temperature in Port Lavaca (TX) in September

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Is it warm enough to swim in Port Lavaca in September? Average water temperature in Port Lavaca in September is 84°F and therefore suitable for comfortable swimming. The warmest sea in Port Lavaca in September is 88.9°F, and the coldest is 78.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Port Lavaca

Changes water temperature in Port Lavaca in September 2025, 2024

To get an accurate forecast for the water temperature in Port Lavaca 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 Lavaca, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
September 186.5°F86.5°F83.8°F87.6°F
September 287.3°F86.4°F83.8°F88.9°F
September 387.4°F86.2°F84.2°F88°F
September 487.6°F85.8°F84.2°F87.8°F
September 587.8°F83.1°F83.1°F88°F
September 6 83.1°F83.1°F87.4°F
September 7 82.8°F82.8°F88.2°F
September 8 82.6°F82.6°F88.3°F
September 9 82.6°F82.2°F88°F
September 10 82.4°F82°F88°F
September 11 81°F81°F87.4°F
September 12 82.2°F81.1°F87.3°F
September 13 84.2°F80.4°F86.7°F
September 14 84.4°F80.6°F86.5°F
September 15 85.1°F80.8°F86.2°F
Day 2025 2024 Min Max
September 16 85.3°F81.1°F86°F
September 17 86°F81.7°F86°F
September 18 86.2°F82.2°F86.2°F
September 19 86.5°F81.3°F86.5°F
September 20 86.5°F78.8°F86.5°F
September 21 86.4°F79.3°F86.4°F
September 22 85.8°F79.5°F85.8°F
September 23 86.7°F79.7°F86.7°F
September 24 86.9°F79.7°F86.9°F
September 25 86.2°F79.5°F86.2°F
September 26 84.6°F79.2°F85.6°F
September 27 82.6°F79°F85.5°F
September 28 82.8°F79°F85.3°F
September 29 82.8°F78.8°F84.9°F
September 30 82.8°F78.6°F84.9°F
Port Lavaca water temp chart in September

Average water temperature in Port Lavaca in September over a decade

20152016201720182019
82.8°F85.1°F82.6°F83.5°F85.3°F
20202021202220232024
83.1°F84.9°F85.1°F86.4°F84.6°F

Port Lavaca sea state in September

Chart comparing the height of waves in Port Lavaca in September 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 Lavaca in September

Port Lavaca 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 September?

Want to know where the water temperature in September 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 September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Magnolia Beach84.2°F78.1°F88.7°F
Seadrift84.2°F78.1°F88°F
Port O'Connor84.4°F78.8°F88.5°F
Rockport84.2°F79°F88.3°F
Matagorda84.6°F79°F88.2°F
Corpus Christi84.6°F79°F88.2°F
Mustang Island84.6°F79.2°F87.6°F
Whitecap Beach84.6°F79.3°F87.4°F
Padre Balli Park84.6°F79.3°F87.4°F
Freeport84.6°F79.2°F88.3°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 Lavaca 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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