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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 68 °F
⇑N 24kt
2-3ft
Saturday
High: 72 °F
N 25kt
4-5ft
Saturday Night
Low: 70 °F
NNE 19kt
2-4ft
Sunday
High: 76 °F
NE 11kt
2ft
Sunday Night
Low: 73 °F
E 11kt
2-3ft
Monday
High: 78 °F
SSE 15kt
2ft
Monday Night
Low: 76 °F
SSE 19kt
2-4ft
Tuesday
High: 81 °F
SSE 21kt
2ft
Tuesday Night
Low: 78 °F
SSE 19kt
2-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:45 pm CDT May 1, 2026
Forecast Valid: 8pm CDT May 1, 2026-6pm CDT May 8, 2026

View Nearby Observations

Detailed Forecast

Tonight

ENE wind 13 to 18 kt becoming N 19 to 24 kt in the evening. Winds could gust as high as 32 kt. A chance of showers and thunderstorms, mainly after midnight. Seas 2 to 3 ft.

Saturday

N wind 21 to 25 kt. A chance of showers, mainly before 11am. Seas 4 to 5 ft.

Saturday Night

NNE wind 10 to 19 kt. Partly cloudy. Seas 2 to 4 ft.

Sunday

NE wind 9 to 11 kt. Mostly sunny. Seas around 2 ft.

Sunday Night

E wind around 11 kt becoming SE after midnight. Partly cloudy. Seas 2 to 3 ft.

Monday

SSE wind 10 to 15 kt. Partly sunny. Seas around 2 ft.

Monday Night

SSE wind 15 to 19 kt. Mostly cloudy. Seas 2 to 4 ft.

Tuesday

SSE wind 18 to 21 kt. Partly sunny. Seas around 2 ft.

Tuesday Night

SSE wind around 19 kt. Partly cloudy. Seas 2 to 4 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.