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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 86 °F
SE 13kt
2ft
Tonight
Low: 84 °F
ESE 16kt
2-3ft
Sunday
High: 86 °F
SSE 19kt
2-4ft
Sunday Night
Low: 85 °F
SSE 20kt
2-4ft
Monday
High: 87 °F
SSE 20kt
2-4ft
Monday Night
Low: 84 °F
SSE 18kt
3ft
Tuesday
High: 86 °F
SSE 16kt
2-3ft
Tuesday Night
Low: 83 °F
SE 14kt
2-3ft
Wednesday
High: 86 °F
SSE 14kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:45 pm CDT Jun 20, 2026
Forecast Valid: 12pm CDT Jun 20, 2026-6pm CDT Jun 26, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 13 kt. A chance of showers and thunderstorms, mainly before 4pm. Seas around 2 ft.

Tonight

ESE wind 13 to 16 kt. A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 1am. Seas 2 to 3 ft.

Sunday

SSE wind 17 to 19 kt. Partly sunny. Seas 2 to 4 ft.

Sunday Night

SSE wind 18 to 20 kt. Mostly cloudy. Seas 2 to 4 ft.

Monday

SSE wind 18 to 20 kt. Partly sunny, then gradually becoming sunny. Seas 2 to 4 ft.

Monday Night

SSE wind around 18 kt. Mostly clear. Seas around 3 ft.

Tuesday

SSE wind around 16 kt. Sunny. Seas 2 to 3 ft.

Tuesday Night

SE wind around 14 kt. Mostly clear. Seas 2 to 3 ft.

Wednesday

SSE wind 12 to 14 kt. Sunny. Seas 2 to 3 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.