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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Thursday
High: 82 °F
ESE 15kt
1-2ft
Thursday Night
Low: 76 °F
ESE 12kt
2ft
Friday
High: 84 °F
SSE 15kt
1-2ft
Friday Night
Low: 65 °F
N 21kt
2-3ft
Saturday
High: 71 °F
N 23kt
3-4ft
Saturday Night
Low: 67 °F
NNE 16kt
1-3ft
Sunday
High: 75 °F
E 11kt
1-2ft
Sunday Night
Low: 70 °F
E 10kt
1-2ft
Monday
High: 78 °F
SE 14kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:30 am CDT Apr 30, 2026
Forecast Valid: 2am CDT Apr 30, 2026-6pm CDT May 6, 2026

View Nearby Observations

Detailed Forecast

Thursday

ESE wind 8 to 15 kt. Mostly cloudy, then gradually becoming sunny. Seas 1 to 2 ft.

Thursday Night

ESE wind 10 to 12 kt. Mostly cloudy. Seas around 2 ft.

Friday

SSE wind 9 to 15 kt. Mostly sunny. Seas 1 to 2 ft.

Friday Night

SE wind 11 to 21 kt becoming N after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas 2 to 3 ft.

Saturday

N wind 21 to 23 kt. A chance of showers and thunderstorms. Seas 3 to 4 ft.

Saturday Night

NNE wind 8 to 16 kt. Mostly cloudy. Seas 1 to 3 ft.

Sunday

NNE wind 8 to 11 kt becoming E in the afternoon. Partly sunny. Seas 1 to 2 ft.

Sunday Night

E wind 7 to 10 kt becoming SE after midnight. Partly cloudy. Seas 1 to 2 ft.

Monday

SE wind 6 to 14 kt. Partly sunny. Seas 1 to 2 ft.

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.