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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 77 °F
SE 9kt
1-2ft
Sunday
High: 80 °F
SE 14kt
1-2ft
Sunday Night
Low: 78 °F
SE 21kt
2-4ft
Monday
High: 81 °F
SSE 22kt
3-4ft
Monday Night
Low: 76 °F
SSE 16kt
1-2ft
Tuesday
High: 81 °F
S 10kt
1-2ft
Tuesday Night
Low: 73 °F
NE 11kt
1ft
Wednesday
High: 75 °F
NNE 18kt
2-3ft
Wednesday Night
Low: 70 °F
NNE 16kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:45 pm CST Nov 22, 2025
Forecast Valid: 10pm CST Nov 22, 2025-6pm CST Nov 29, 2025

View Nearby Observations

Detailed Forecast

Tonight

SE wind around 9 kt. A chance of showers and thunderstorms. Seas 1 to 2 ft.

Sunday

SE wind 9 to 14 kt. A slight chance of showers before 11am. Seas 1 to 2 ft.

Sunday Night

SE wind 15 to 21 kt. Partly cloudy. Seas 2 to 4 ft.

Monday

SSE wind 17 to 22 kt. Mostly sunny. Seas 3 to 4 ft.

Monday Night

SSE wind 11 to 16 kt. Partly cloudy. Seas 1 to 2 ft.

Tuesday

S wind around 10 kt becoming SE in the afternoon. Sunny. Seas 1 to 2 ft.

Tuesday Night

ESE wind 9 to 11 kt becoming NE after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Seas around 1 ft.

Wednesday

NNE wind 12 to 18 kt. Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Seas 2 to 3 ft.

Wednesday Night

NNE wind around 16 kt. A chance of showers. 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.