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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Sunday
High: 82 °F
⇑NE 11kt
1-2ft
Sunday Night
Low: 79 °F
ENE 11kt⇓
1ft
Memorial Day
High: 81 °F
ENE 10kt
1ft
Monday Night
Low: 78 °F
E 10kt
1-2ft
Tuesday
High: 83 °F
SSE 14kt
1-2ft
Tuesday Night
Low: 80 °F
SE 16kt
2-3ft
Wednesday
High: 83 °F
SSE 18kt
2-3ft
Wednesday Night
Low: 80 °F
SSE 15kt
2-3ft
Thursday
High: 83 °F
SSE 12kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:15 am CDT May 24, 2026
Forecast Valid: 1am CDT May 24, 2026-6pm CDT May 30, 2026

View Nearby Observations

Detailed Forecast

Sunday

Variable winds less than 5 kt becoming NE 6 to 11 kt in the morning. A slight chance of showers and thunderstorms between 1pm and 2pm. Seas 1 to 2 ft.

Sunday Night

ENE wind 6 to 11 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas around 1 ft.

Memorial Day

N wind 5 to 10 kt becoming ENE in the afternoon. Sunny. Seas around 1 ft.

Monday Night

E wind 8 to 10 kt becoming SE after midnight. Increasing clouds. Seas 1 to 2 ft.

Tuesday

SSE wind 9 to 14 kt. Partly sunny. Seas 1 to 2 ft.

Tuesday Night

SE wind 14 to 16 kt. A slight chance of showers and thunderstorms after 1am. Seas 2 to 3 ft.

Wednesday

SSE wind 16 to 18 kt. A chance of showers and thunderstorms. Seas 2 to 3 ft.

Wednesday Night

SSE wind 12 to 15 kt. A slight chance of showers and thunderstorms. Seas 2 to 3 ft.

Thursday

SSE wind 9 to 12 kt. Mostly sunny. Seas around 2 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.