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Brownsville, TX Local Forecast Office

4NM E Port Isabel TX

Marine Point Forecast

[NOTICE]

Sunday
High: 86 °F
ESE 13kt
1ft
Sunday Night
Low: 80 °F
ESE 12kt
1ft
Columbus Day
High: 88 °F
SE 13kt
< 1ft
Monday Night
Low: 81 °F
SE 12kt
1ft
Tuesday
High: 88 °F
SSE 16kt
< 1ft
Tuesday Night
Low: 82 °F
SSE 14kt
< 1ft
Wednesday
High: 88 °F
SE 17kt
< 1ft
Wednesday Night
Low: 82 °F
SE 15kt
< 1ft
Thursday
High: 85 °F
SE 15kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:46 am CDT Oct 11, 2026
Forecast Valid: 1am CDT Oct 11, 2026-6pm CDT Oct 17, 2026

View Nearby Observations

Detailed Forecast

Sunday

ESE wind around 13 kt. Mostly sunny. Seas around 1 ft.

Sunday Night

ESE wind 10 to 12 kt. A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Seas around 1 ft.

Columbus Day

SE wind 10 to 13 kt. Mostly sunny. Seas 1 ft or less.

Monday Night

SE wind around 12 kt. Partly cloudy. Seas around 1 ft.

Tuesday

SSE wind 12 to 16 kt. Sunny. Seas 1 ft or less.

Tuesday Night

SSE wind around 14 kt. Mostly clear. Seas 1 ft or less.

Wednesday

SE wind 14 to 17 kt. Sunny. Seas 1 ft or less.

Wednesday Night

SE wind around 15 kt. Mostly clear. Seas 1 ft or less.

Thursday

SE wind 13 to 15 kt. Sunny. 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.