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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 82 °F
ESE 12kt
< 1ft
Tonight
Low: 75 °F
E 10kt
< 1ft
Sunday
High: 81 °F
SE 16kt
< 1ft
Sunday Night
Low: 76 °F
SSE 19kt
< 1ft
Monday
High: 83 °F
SSE 20kt
< 1ft
Monday Night
Low: 74 °F
SSE 15kt
< 1ft
Tuesday
High: 83 °F
SE 10kt
< 1ft
Tuesday Night
Low: 70 °F
ESE 10kt
< 1ft
Wednesday
High: 76 °F
NNE 18kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:45 am CST Nov 22, 2025
Forecast Valid: 5am CST Nov 22, 2025-6pm CST Nov 28, 2025

View Nearby Observations

Detailed Forecast

Today

SSE wind 5 to 12 kt becoming E in the afternoon. A chance of showers and thunderstorms, mainly before 3pm. Seas 1 ft or less.

Tonight

E wind 8 to 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Sunday

SE wind 9 to 16 kt. A chance of showers before noon. Seas 1 ft or less.

Sunday Night

SSE wind 14 to 19 kt. Partly cloudy. Seas 1 ft or less.

Monday

SSE wind 17 to 20 kt. Mostly sunny. Seas 1 ft or less.

Monday Night

SSE wind 10 to 15 kt. Partly cloudy. Seas 1 ft or less.

Tuesday

S wind 7 to 10 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

Tuesday Night

ESE wind 7 to 10 kt becoming NNE after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Seas 1 ft or less.

Wednesday

NNE wind 11 to 18 kt. Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. 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.