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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 81 °F
SSE 15kt
2ft
Tonight
Low: 67 °F
⇑N 23kt
1-3ft
Saturday
High: 72 °F
N 25kt
4-5ft
Saturday Night
Low: 70 °F
NE 19kt
5ft
Sunday
High: 75 °F
NE 11kt
2ft
Sunday Night
Low: 72 °F
E 11kt
2-3ft
Monday
High: 78 °F
SE 14kt
2ft
Monday Night
Low: 75 °F
SSE 18kt
2-3ft
Tuesday
High: 80 °F
S 19kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:45 am CDT May 1, 2026
Forecast Valid: 9am CDT May 1, 2026-6pm CDT May 7, 2026

View Nearby Observations

Detailed Forecast

Today

SSE wind 12 to 15 kt. Increasing clouds. Seas around 2 ft.

Tonight

SSE wind 12 to 17 kt becoming N 18 to 23 kt after midnight. Showers and thunderstorms likely, mainly before 4am, then showers likely and possibly a thunderstorm after 5am. Seas 1 to 3 ft.

Saturday

N wind 22 to 25 kt. A chance of showers, mainly before 1pm. Seas 4 to 5 ft.

Saturday Night

NE wind 11 to 19 kt. Partly cloudy. Seas 5 ft subsiding to 2 ft.

Sunday

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

Sunday Night

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

Monday

SE wind 10 to 14 kt. Partly sunny. Seas around 2 ft.

Monday Night

SSE wind 15 to 18 kt. Mostly cloudy. Seas 2 to 3 ft.

Tuesday

S wind 17 to 19 kt. Partly sunny. Seas around 2 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.