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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 81 °F
ENE 10kt⇓
< 1ft
Friday
High: 87 °F
⇑NE 12kt
< 1ft
Friday Night
Low: 80 °F
ENE 10kt⇓
< 1ft
Saturday
High: 87 °F
⇑ENE 12kt
< 1ft
Saturday Night
Low: 80 °F
E 10kt⇓
< 1ft
Sunday
High: 87 °F
⇑E 12kt
< 1ft
Sunday Night
Low: 80 °F
E 10kt⇓
< 1ft
Monday
High: 90 °F
⇑E 12kt
< 1ft
Monday Night
Low: 80 °F
E 10kt⇓
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:30 pm CDT Sep 17, 2026
Forecast Valid: 6pm CDT Sep 17, 2026-6pm CDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

Tonight

ENE wind 5 to 10 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after 4am. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming NE 7 to 12 kt in the morning. A chance of showers and thunderstorms, mainly before 9am. Seas 1 ft or less.

Friday Night

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

Saturday

Variable winds less than 5 kt becoming ENE 7 to 12 kt in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

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

Sunday

Variable winds less than 5 kt becoming E 7 to 12 kt in the afternoon. Sunny. Seas 1 ft or less.

Sunday Night

E wind 5 to 10 kt becoming variable and less than 5 kt after midnight. A slight chance of showers and thunderstorms after 1am. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming E 7 to 12 kt in the afternoon. A slight chance of showers and thunderstorms. Seas 1 ft or less.

Monday Night

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

Winds and waves 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.