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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 84 °F
NE 12kt
1ft
Tonight
Low: 80 °F
NE 12kt
1-2ft
Saturday
High: 84 °F
NNE 12kt
1-2ft
Saturday Night
Low: 79 °F
NE 11kt
2ft
Sunday
High: 85 °F
ENE 9kt
2ft
Sunday Night
Low: 81 °F
E 9kt
2ft
Monday
High: 85 °F
E 9kt
1-2ft
Monday Night
Low: 81 °F
E 9kt
1ft
Tuesday
High: 85 °F
ENE 11kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:15 am CDT Oct 3, 2025
Forecast Valid: 5am CDT Oct 3, 2025-6pm CDT Oct 9, 2025

View Nearby Observations

Detailed Forecast

Today

NE wind 6 to 12 kt. A slight chance of showers and thunderstorms after 1pm. Seas around 1 ft.

Tonight

NE wind 9 to 12 kt. A chance of showers and thunderstorms, mainly after 2am. Seas 1 to 2 ft.

Saturday

NNE wind 9 to 12 kt. A chance of showers and thunderstorms. Seas 1 to 2 ft.

Saturday Night

NE wind 6 to 11 kt becoming E after midnight. A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Seas around 2 ft.

Sunday

ENE wind 5 to 9 kt. A slight chance of showers and thunderstorms before 1pm. Seas around 2 ft.

Sunday Night

E wind 6 to 9 kt becoming SSE after midnight. Mostly clear. Seas around 2 ft.

Monday

SSE wind 5 to 9 kt becoming E in the afternoon. A slight chance of showers. Seas 1 to 2 ft.

Monday Night

E wind 7 to 9 kt. A slight chance of showers. Seas around 1 ft.

Tuesday

ESE wind 5 to 11 kt becoming ENE in the afternoon. A chance of showers. Seas around 1 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.