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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Overnight
Low: 79 °F
Light Wind
< 1ft
Sunday
High: 86 °F
⇑E 12kt
< 1ft
Sunday Night
Low: 80 °F
ESE 10kt
< 1ft
Monday
High: 88 °F
SE 15kt
< 1ft
Monday Night
Low: 81 °F
SE 14kt
< 1ft
Tuesday
High: 88 °F
SE 17kt
< 1ft
Tuesday Night
Low: 81 °F
SSE 14kt
< 1ft
Wednesday
High: 91 °F
SSE 18kt
< 1ft
Wednesday Night
Low: 81 °F
SSE 17kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:00 am CDT Aug 9, 2026
Forecast Valid: 12am CDT Aug 9, 2026-6pm CDT Aug 15, 2026

View Nearby Observations

Detailed Forecast

Overnight

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming E 7 to 12 kt in the afternoon. A slight chance of showers and thunderstorms between 8am and 4pm. Seas 1 ft or less.

Sunday Night

ESE wind 6 to 10 kt becoming S after midnight. Mostly clear. Seas 1 ft or less.

Monday

SE wind 5 to 15 kt. Sunny. Seas 1 ft or less.

Monday Night

SE wind 9 to 14 kt. Mostly clear. Seas 1 ft or less.

Tuesday

SE wind 8 to 17 kt. Sunny. Seas 1 ft or less.

Tuesday Night

SSE wind 10 to 14 kt. Clear. Seas 1 ft or less.

Wednesday

SSE wind 11 to 18 kt. Sunny. Seas 1 ft or less.

Wednesday Night

SSE wind 13 to 17 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.