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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 82 °F
E 13kt
< 1ft
Thursday
High: 88 °F
ENE 14kt
< 1ft
Thursday Night
Low: 82 °F
E 12kt
< 1ft
Friday
High: 87 °F
E 14kt
< 1ft
Friday Night
Low: 82 °F
ESE 12kt
< 1ft
Saturday
High: 88 °F
⇑E 13kt
< 1ft
Saturday Night
Low: 81 °F
SE 10kt
< 1ft
Sunday
High: 90 °F
⇑E 12kt
< 1ft
Sunday Night
Low: 81 °F
ESE 11kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:30 pm CDT Sep 23, 2026
Forecast Valid: 6pm CDT Sep 23, 2026-6pm CDT Sep 30, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 6 to 13 kt. A slight chance of showers before 2am, then a slight chance of showers after 4am. Seas 1 ft or less.

Thursday

ENE wind 6 to 14 kt. A chance of showers, with thunderstorms also possible after 10am. Seas 1 ft or less.

Thursday Night

E wind 6 to 12 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Friday

E wind 7 to 14 kt. A chance of showers, with thunderstorms also possible after 10am. Seas 1 ft or less.

Friday Night

ESE wind 6 to 12 kt. A slight chance of thunderstorms before 7pm. Seas 1 ft or less.

Saturday

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

Saturday Night

SE wind 5 to 10 kt. Partly cloudy. Seas 1 ft or less.

Sunday

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

Sunday Night

ESE wind 6 to 11 kt. Partly cloudy. 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.