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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 88 °F
E 11kt
< 1ft
Tonight
Low: 82 °F
ESE 10kt⇓
< 1ft
Monday
High: 88 °F
⇑E 12kt
< 1ft
Monday Night
Low: 82 °F
E 10kt⇓
< 1ft
Tuesday
High: 88 °F
⇑E 13kt
< 1ft
Tuesday Night
Low: 82 °F
E 11kt⇓
< 1ft
Wednesday
High: 87 °F
⇑E 14kt
< 1ft
Wednesday Night
Low: 81 °F
E 10kt⇓
< 1ft
Thursday
High: 90 °F
⇑ENE 13kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:31 pm CDT Sep 20, 2026
Forecast Valid: 5pm CDT Sep 20, 2026-6pm CDT Sep 27, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

E wind around 11 kt. Sunny. Seas 1 ft or less.

Tonight

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

Monday

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

Tuesday

Variable winds less than 5 kt becoming E 8 to 13 kt in the morning. A chance of showers, with thunderstorms also possible after 10am. Seas 1 ft or less.

Tuesday Night

E wind 6 to 11 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming E 9 to 14 kt in the morning. A chance of showers and thunderstorms. Seas 1 ft or less.

Wednesday 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.

Thursday

Variable winds less than 5 kt becoming ENE 8 to 13 kt in the morning. A chance of showers and thunderstorms. 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.