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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 80 °F
SE 17kt
2ft
Thursday
High: 84 °F
SE 13kt
2ft
Thursday Night
Low: 79 °F
ESE 10kt⇓
2ft
Friday
High: 83 °F
⇑N 26kt
1-3ft
Friday Night
Low: 69 °F
N 30kt
4-6ft
Saturday
High: 73 °F
N 29kt
5-6ft
Saturday Night
Low: 70 °F
N 19kt
3-4ft
Sunday
High: 76 °F
N 17kt
3ft
Sunday Night
Low: 73 °F
NNE 13kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:00 pm CDT Oct 14, 2026
Forecast Valid: 6pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026

View Nearby Observations

Detailed Forecast

Tonight

SE wind 14 to 17 kt. Mostly clear. Seas around 2 ft.

Thursday

SE wind 10 to 13 kt. Sunny. Seas around 2 ft.

Thursday Night

ESE wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas around 2 ft.

Friday

N wind 6 to 16 kt increasing to 16 to 26 kt in the afternoon. Winds could gust as high as 32 kt. A slight chance of showers before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers likely after 4pm. Seas 1 to 3 ft.

Friday Night

N wind 27 to 30 kt, with gusts as high as 37 kt. A chance of showers before 1am. Seas 4 to 6 ft.

Saturday

N wind 24 to 29 kt, with gusts as high as 37 kt. Mostly cloudy. Seas 5 to 6 ft.

Saturday Night

N wind 14 to 19 kt. Mostly cloudy. Seas 3 to 4 ft.

Sunday

N wind around 17 kt. Partly sunny. Seas around 3 ft.

Sunday Night

NNE wind 8 to 13 kt. A slight chance of showers. Seas 2 to 3 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.