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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 80 °F
NE 12kt
2ft
Tonight
Low: 78 °F
NE 12kt
2-3ft
Friday
High: 81 °F
SE 14kt
2ft
Friday Night
Low: 78 °F
SE 11kt
2ft
Saturday
High: 81 °F
⇑E 9kt
1ft
Saturday Night
Low: 78 °F
E 9kt⇓
1-2ft
Sunday
High: 82 °F
⇑E 10kt
1-2ft
Sunday Night
Low: 78 °F
E 9kt
1-2ft
Monday
High: 80 °F
NE 14kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:45 pm CDT May 7, 2026
Forecast Valid: 2pm CDT May 7, 2026-6pm CDT May 13, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

NE wind around 12 kt. A slight chance of showers and thunderstorms between 3pm and 4pm. Seas around 2 ft.

Tonight

NE wind 7 to 12 kt. Mostly cloudy. Seas 2 to 3 ft.

Friday

SE wind 6 to 14 kt. Partly sunny. Seas around 2 ft.

Friday Night

SE wind 6 to 11 kt. Mostly cloudy. Seas around 2 ft.

Saturday

Variable winds less than 5 kt becoming E 5 to 9 kt in the morning. A chance of showers and thunderstorms, mainly between 7am and 1pm. Seas around 1 ft.

Saturday Night

E wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas 1 to 2 ft.

Sunday

Variable winds less than 5 kt becoming E 5 to 10 kt in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Sunday Night

E wind 5 to 9 kt. Mostly cloudy. Seas 1 to 2 ft.

Monday

NE wind 7 to 14 kt. Partly sunny. Seas 1 to 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.