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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Thursday
High: 74 °F
N 17kt
1-2ft

Small Craft Advisory
Thursday Night
Low: 55 °F
NNW 21kt
2-3ft

Small Craft Advisory
Friday
High: 66 °F
N 18kt
2ft

Small Craft Advisory
Friday Night
Low: 63 °F
N 9kt
1ft
Saturday
High: 72 °F
NNW 9kt
1ft
Saturday Night
Low: 66 °F
ENE 7kt⇓
1ft
Sunday
High: 75 °F
N 11kt
1-2ft
Sunday Night
Low: 59 °F
N 16kt
2ft
Monday
High: 65 °F
N 15kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:45 am CST Dec 4, 2025
Forecast Valid: 3am CST Dec 4, 2025-6pm CST Dec 10, 2025

View Nearby Observations

Detailed Forecast

Thursday

S wind 7 to 17 kt becoming N in the afternoon. A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 to 2 ft.

Thursday Night

NNW wind 18 to 21 kt. A chance of showers, mainly after 2am. Seas 2 to 3 ft.

Friday

N wind 10 to 18 kt. A slight chance of showers before noon. Seas around 2 ft.

Friday Night

N wind 7 to 9 kt. A chance of showers. Seas around 1 ft.

Saturday

NNW wind 7 to 9 kt becoming NE in the afternoon. Mostly cloudy. Seas around 1 ft.

Saturday Night

ENE wind 5 to 7 kt becoming variable and less than 5 kt. Mostly cloudy. Seas around 1 ft.

Sunday

W wind 5 to 11 kt becoming NNE in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Sunday Night

N wind 11 to 16 kt. Partly cloudy. Seas around 2 ft.

Monday

N wind 10 to 15 kt. Mostly 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.