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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 77 °F
SSE 12kt
2-3ft
Tonight
Low: 63 °F
N 12kt
2ft
Saturday
High: 68 °F
⇑N 28kt
2-4ft
Saturday Night
Low: 58 °F
N 26kt
7ft
Sunday
High: 62 °F
N 23kt
6ft
Sunday Night
Low: 59 °F
N 17kt
3-4ft
Monday
High: 64 °F
N 13kt
2-4ft
Monday Night
Low: 59 °F
NNE 12kt
2-3ft
Tuesday
High: 64 °F
NE 8kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:47 pm CST Jan 9, 2026
Forecast Valid: 1pm CST Jan 9, 2026-6pm CST Jan 15, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SSE wind 10 to 12 kt. Mostly sunny. Seas 2 to 3 ft.

Tonight

SSE wind 6 to 12 kt becoming NNW after midnight. A chance of showers and thunderstorms after 3am. Patchy fog after 11pm. Seas around 2 ft.

Saturday

N wind 17 to 22 kt increasing to 23 to 28 kt in the morning. A chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and 10am. Patchy fog before 7am. Seas 2 to 4 ft.

Saturday Night

N wind 24 to 26 kt. Cloudy. Seas 4 ft building to 7 ft.

Sunday

N wind 18 to 23 kt. Mostly cloudy. Seas 6 ft subsiding to 3 ft.

Sunday Night

N wind 13 to 17 kt. Cloudy. Seas 3 to 4 ft.

Monday

N wind around 13 kt. A slight chance of showers. Seas 2 to 4 ft.

Monday Night

NNE wind 7 to 12 kt. A slight chance of showers. Seas 2 to 3 ft.

Tuesday

NE wind 6 to 8 kt. Mostly cloudy. Seas 2 to 3 ft.

*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.