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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 85 °F
ESE 20kt
2-4ft
Tonight
Low: 83 °F
ESE 23kt
3-5ft
Sunday
High: 85 °F
SSE 16kt
2-3ft
Sunday Night
Low: 82 °F
SE 16kt
2-3ft
Monday
High: 84 °F
SSE 15kt
2ft
Monday Night
Low: 81 °F
SE 14kt
2-3ft
Tuesday
High: 83 °F
SSE 14kt
2ft
Tuesday Night
Low: 81 °F
SE 16kt
2-3ft
Wednesday
High: 85 °F
SSE 17kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 11:00 am CDT Jun 13, 2026
Forecast Valid: 11am CDT Jun 13, 2026-6pm CDT Jun 19, 2026

View Nearby Observations

Detailed Forecast

Today

ESE wind 15 to 20 kt. A chance of showers and thunderstorms. Seas 2 to 4 ft.

Tonight

ESE wind 16 to 23 kt. A chance of showers and thunderstorms. Seas 3 to 5 ft.

Sunday

SSE wind around 16 kt. Showers and thunderstorms likely before 3pm, then a slight chance of showers and thunderstorms after 4pm. Seas 2 to 3 ft.

Sunday Night

SE wind around 16 kt. A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am, then showers likely and possibly a thunderstorm after 1am. Seas 2 to 3 ft.

Monday

SSE wind 13 to 15 kt. Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Seas around 2 ft.

Monday Night

SE wind 12 to 14 kt. Showers and possibly a thunderstorm. Seas 2 to 3 ft.

Tuesday

SSE wind 12 to 14 kt. Showers likely and possibly a thunderstorm. Seas around 2 ft.

Tuesday Night

SE wind 12 to 16 kt. Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 2 to 3 ft.

Wednesday

SSE wind 15 to 17 kt. A chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Seas around 2 ft.

*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.