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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 86 °F
SSE 17kt
2-3ft
Tonight
Low: 83 °F
SSE 16kt
2-3ft
Monday
High: 85 °F
SSE 15kt
2ft
Monday Night
Low: 82 °F
SSE 17kt
2-3ft
Tuesday
High: 84 °F
SSE 17kt
2ft
Tuesday Night
Low: 82 °F
SSE 18kt
2-3ft
Wednesday
High: 85 °F
SSE 18kt
2ft
Wednesday Night
Low: 84 °F
SSE 23kt
4-5ft
Thursday
High: 86 °F
SSE 23kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:00 am CDT Jun 14, 2026
Forecast Valid: 10am CDT Jun 14, 2026-6pm CDT Jun 20, 2026

View Nearby Observations

Detailed Forecast

Today

SSE wind around 17 kt. A chance of showers and thunderstorms, mainly before 1pm. Seas 2 to 3 ft.

Tonight

SSE wind around 16 kt. A chance of showers and thunderstorms, mainly after 1am. Seas 2 to 3 ft.

Monday

SSE wind around 15 kt. Showers and thunderstorms likely, mainly before 1pm. Seas around 2 ft.

Monday Night

SSE wind 13 to 17 kt. A chance of showers and thunderstorms between 7pm and 1am, then showers and possibly a thunderstorm after 1am. Seas 2 to 3 ft.

Tuesday

SSE wind 14 to 17 kt. Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 10am, then showers likely and possibly a thunderstorm after 10am. Seas around 2 ft.

Tuesday Night

SSE wind 13 to 18 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Some of the storms could produce heavy rainfall. Seas 2 to 3 ft.

Wednesday

SSE wind around 18 kt. Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall. Seas around 2 ft.

Wednesday Night

SSE wind 17 to 23 kt. A chance of showers and thunderstorms. Seas 4 to 5 ft.

Thursday

SSE wind around 23 kt. A slight chance of showers and thunderstorms. Seas around 3 ft.

Winds and seas higher in and near thunderstorms.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.