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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 78 °F
ESE 16kt
< 1ft
Tonight
Low: 73 °F
SE 15kt
< 1ft
Sunday
High: 78 °F
SE 18kt
< 1ft
Sunday Night
Low: 73 °F
SE 16kt
< 1ft
Monday
High: 79 °F
SE 17kt
< 1ft
Monday Night
Low: 74 °F
SE 15kt
< 1ft
Tuesday
High: 79 °F
SSE 19kt
< 1ft
Tuesday Night
Low: 74 °F
SE 17kt
< 1ft
Wednesday
High: 80 °F
SSE 20kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:00 am CDT Apr 11, 2026
Forecast Valid: 10am CDT Apr 11, 2026-6pm CDT Apr 17, 2026

View Nearby Observations

Detailed Forecast

Today

ESE wind 10 to 16 kt. A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm. Seas 1 ft or less.

Tonight

SE wind 13 to 15 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

SE wind 14 to 18 kt. Mostly cloudy. Seas 1 ft or less.

Sunday Night

SE wind 12 to 16 kt. Mostly cloudy. Seas 1 ft or less.

Monday

SE wind 12 to 17 kt. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.

Monday Night

SE wind 13 to 15 kt. Mostly cloudy. Seas 1 ft or less.

Tuesday

SSE wind 13 to 19 kt. Mostly sunny. Seas 1 ft or less.

Tuesday Night

SE wind 15 to 17 kt. Partly cloudy. Seas 1 ft or less.

Wednesday

SSE wind 15 to 20 kt, with gusts as high as 26 kt. Partly 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.