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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 85 °F
E 17kt
2-4ft
Tonight
Low: 83 °F
SE 20kt
3-5ft
Sunday
High: 85 °F
SSE 18kt
2-3ft
Sunday Night
Low: 83 °F
SE 16kt
2-3ft
Monday
High: 84 °F
SSE 16kt
2ft
Monday Night
Low: 82 °F
SE 17kt
2-3ft
Tuesday
High: 84 °F
SSE 19kt
2ft
Tuesday Night
Low: 81 °F
SE 20kt
3-4ft
Wednesday
High: 85 °F
S 20kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:46 pm CDT Jun 13, 2026
Forecast Valid: 1pm CDT Jun 13, 2026-6pm CDT Jun 19, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

E wind around 17 kt. Showers and thunderstorms likely before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 2 to 4 ft.

Tonight

SE wind 17 to 20 kt. Showers and thunderstorms likely, mainly before 2am, then showers likely and possibly a thunderstorm after 5am. Seas 3 to 5 ft.

Sunday

SSE wind around 18 kt. Showers and thunderstorms likely, mainly before 2pm. Seas 2 to 3 ft.

Sunday Night

SE wind around 16 kt. A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Seas 2 to 3 ft.

Monday

SSE wind 14 to 16 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 14 to 17 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas 2 to 3 ft.

Tuesday

SSE wind 15 to 19 kt. Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Seas around 2 ft.

Tuesday Night

SE wind 14 to 20 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 3 to 4 ft.

Wednesday

S wind 18 to 20 kt. Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Seas 2 to 3 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.