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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 80 °F
SSW 12kt
< 1ft
Thursday
High: 89 °F
SSE 14kt
< 1ft
Thursday Night
Low: 81 °F
SSE 16kt
< 1ft
Friday
High: 89 °F
SSE 17kt
< 1ft
Friday Night
Low: 81 °F
SE 15kt
< 1ft
Saturday
High: 88 °F
ESE 14kt
< 1ft
Saturday Night
Low: 80 °F
ESE 12kt
< 1ft
Sunday
High: 90 °F
SE 14kt
< 1ft
Sunday Night
Low: 80 °F
SE 12kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:18 pm CDT Jul 22, 2026
Forecast Valid: 8pm CDT Jul 22, 2026-6pm CDT Jul 29, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind 9 to 12 kt. Partly cloudy. Seas 1 ft or less.

Thursday

SSW wind 7 to 14 kt becoming SSE in the afternoon. A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 4pm, then a chance of showers after 4pm. Seas 1 ft or less.

Thursday Night

SSE wind 12 to 16 kt. A chance of showers, mainly before 2am. Seas 1 ft or less.

Friday

SSE wind 12 to 17 kt. Sunny. Seas 1 ft or less.

Friday Night

SE wind 10 to 15 kt. Mostly clear. Seas 1 ft or less.

Saturday

ESE wind 8 to 14 kt. Sunny. Seas 1 ft or less.

Saturday Night

ESE wind 7 to 12 kt. Clear. Seas 1 ft or less.

Sunday

SE wind 5 to 14 kt. Sunny. Seas 1 ft or less.

Sunday Night

SE wind 9 to 12 kt. Clear. 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.