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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 76 °F
SE 11kt
< 1ft
Thursday
High: 82 °F
SE 16kt
< 1ft
Thursday Night
Low: 76 °F
ESE 12kt
< 1ft
Friday
High: 84 °F
SSE 15kt
< 1ft
Friday Night
Low: 64 °F
N 19kt
< 1ft
Saturday
High: 70 °F
N 23kt
< 1ft
Saturday Night
Low: 66 °F
NNE 17kt
< 1ft
Sunday
High: 74 °F
NE 11kt
< 1ft
Sunday Night
Low: 68 °F
ENE 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:30 pm CDT Apr 29, 2026
Forecast Valid: 8pm CDT Apr 29, 2026-6pm CDT May 6, 2026

View Nearby Observations

Detailed Forecast

Tonight

SE wind 9 to 11 kt. Mostly cloudy. Seas 1 ft or less.

Thursday

SE wind 9 to 16 kt. Partly sunny. Seas 1 ft or less.

Thursday Night

ESE wind 10 to 12 kt. Mostly cloudy. Seas 1 ft or less.

Friday

SSE wind 9 to 15 kt. Mostly sunny. Seas 1 ft or less.

Friday Night

SE wind 11 to 19 kt becoming N after midnight. Winds could gust as high as 25 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas 1 ft or less.

Saturday

N wind 20 to 23 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Saturday Night

NNE wind 8 to 17 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

NE wind 8 to 11 kt. Partly sunny. Seas 1 ft or less.

Sunday Night

ENE wind 5 to 10 kt becoming SE after midnight. Partly cloudy. 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.