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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 83 °F
SSE 14kt
1-2ft
Tonight
Low: 81 °F
SSE 13kt
1-2ft
Saturday
High: 82 °F
SSE 13kt
1ft
Saturday Night
Low: 79 °F
ESE 12kt
1-2ft
Sunday
High: 82 °F
E 9kt
1ft
Sunday Night
Low: 78 °F
E 9kt⇓
1ft
Memorial Day
High: 81 °F
ENE 9kt
1-2ft
Monday Night
Low: 80 °F
E 9kt
1ft
Tuesday
High: 83 °F
SSE 14kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:45 am CDT May 22, 2026
Forecast Valid: 7am CDT May 22, 2026-6pm CDT May 28, 2026

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Detailed Forecast

Today

SSE wind 11 to 14 kt. Mostly sunny. Seas 1 to 2 ft.

Tonight

SSE wind 10 to 13 kt. A slight chance of showers and thunderstorms between 2am and 4am. Seas 1 to 2 ft.

Saturday

SSE wind 11 to 13 kt. A chance of showers and thunderstorms, mainly after noon. Seas around 1 ft.

Saturday Night

ESE wind 8 to 12 kt becoming SSW after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas 1 to 2 ft.

Sunday

SE wind 7 to 9 kt becoming E in the afternoon. Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Seas around 1 ft.

Sunday Night

E wind 5 to 9 kt becoming variable and less than 5 kt after midnight. A chance of showers, with thunderstorms also possible after 7pm. Seas around 1 ft.

Memorial Day

SSW wind 5 to 9 kt becoming NE in the morning. A slight chance of showers and thunderstorms. Seas 1 to 2 ft.

Monday Night

E wind 7 to 9 kt becoming SSE after midnight. Partly cloudy. Seas around 1 ft.

Tuesday

SSE wind 7 to 14 kt. Mostly sunny. Seas 1 to 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.