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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 86 °F
ESE 15kt
3ft
Tonight
Low: 84 °F
SSE 18kt
2-4ft
Friday
High: 85 °F
E 16kt
2-4ft
Friday Night
Low: 83 °F
SE 18kt
3-4ft
Saturday
High: 84 °F
ESE 16kt
2-3ft
Saturday Night
Low: 83 °F
ESE 18kt
3-5ft
Sunday
High: 85 °F
SE 15kt
2-3ft
Sunday Night
Low: 82 °F
SE 16kt
2-4ft
Monday
High: 85 °F
SSE 15kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:30 pm CDT Jun 11, 2026
Forecast Valid: 4pm CDT Jun 11, 2026-6pm CDT Jun 17, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

ESE wind around 15 kt. Sunny. Seas around 3 ft.

Tonight

SSE wind 15 to 18 kt. Partly cloudy. Seas 2 to 4 ft.

Friday

SE wind 14 to 16 kt becoming E in the afternoon. Sunny. Seas 2 to 4 ft.

Friday Night

SE wind 14 to 18 kt. A slight chance of showers before 10pm, then a chance of showers and thunderstorms after 1am. Seas 3 to 4 ft.

Saturday

ESE wind 13 to 16 kt. A chance of showers and thunderstorms, mainly before 1pm. Seas 2 to 3 ft.

Saturday Night

ESE wind 13 to 18 kt. A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Seas 3 to 5 ft.

Sunday

SE wind 12 to 15 kt. A chance of showers and thunderstorms, mainly before 1pm. Seas 2 to 3 ft.

Sunday Night

SE wind around 16 kt. A chance of showers and thunderstorms, mainly after 1am. Seas 2 to 4 ft.

Monday

SSE wind around 15 kt. A chance of showers and thunderstorms. Seas around 2 ft.

Winds and seas 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.