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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Thursday
High: 86 °F
SE 13kt
< 1ft
Thursday Night
Low: 77 °F
ESE 10kt⇓
< 1ft
Friday
High: 84 °F
⇑N 27kt
< 1ft
Friday Night
Low: 66 °F
N 27kt
< 1ft
Saturday
High: 71 °F
N 25kt
< 1ft
Saturday Night
Low: 65 °F
N 17kt
< 1ft
Sunday
High: 75 °F
NNW 17kt
< 1ft
Sunday Night
Low: 69 °F
NNE 11kt
< 1ft
Monday
High: 80 °F
NNE 13kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:15 am CDT Oct 15, 2026
Forecast Valid: 2am CDT Oct 15, 2026-6pm CDT Oct 21, 2026

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Detailed Forecast

Thursday

SE wind 10 to 13 kt. Sunny. Seas 1 ft or less.

Thursday Night

ESE wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

Friday

N wind 6 to 16 kt increasing to 17 to 27 kt in the afternoon. Winds could gust as high as 33 kt. A slight chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Seas 1 ft or less.

Friday Night

N wind 24 to 27 kt, with gusts as high as 35 kt. Mostly cloudy. Seas 1 ft or less.

Saturday

N wind 22 to 25 kt, with gusts as high as 33 kt. Partly sunny. Seas 1 ft or less.

Saturday Night

N wind 13 to 17 kt. Partly cloudy. Seas 1 ft or less.

Sunday

NNW wind 14 to 17 kt. Partly sunny. Seas 1 ft or less.

Sunday Night

NNE wind 5 to 11 kt. Mostly cloudy. Seas 1 ft or less.

Monday

NNE wind 8 to 13 kt. Partly sunny. Seas 1 ft or less.

*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.