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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Today
High: 75 °F
SE 12kt
2ft
Tonight
Low: 71 °F
S 12kt
2ft
Saturday
High: 75 °F
SSE 16kt
1-2ft
Saturday Night
Low: 71 °F
SSE 15kt
2ft
Sunday
High: 76 °F
SSE 16kt
2ft
Sunday Night
Low: 62 °F
SSE 12kt
2ft
Monday
High: 70 °F
⇑N 26kt
2-4ft
Monday Night
Low: 52 °F
N 26kt
7ft
Tuesday
High: 56 °F
N 23kt
7ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:00 am CST Dec 26, 2025
Forecast Valid: 10am CST Dec 26, 2025-6pm CST Jan 1, 2026

View Nearby Observations

Detailed Forecast

Today

SE wind 8 to 12 kt. Mostly sunny. Seas around 2 ft.

Tonight

S wind around 12 kt. Partly cloudy. Seas around 2 ft.

Saturday

SSE wind 10 to 16 kt. Sunny. Seas 1 to 2 ft.

Saturday Night

SSE wind around 15 kt. Mostly clear. Seas around 2 ft.

Sunday

SSE wind 13 to 16 kt. Sunny. Seas around 2 ft.

Sunday Night

SSE wind 9 to 12 kt becoming NE after midnight. A chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Seas around 2 ft.

Monday

ENE wind 13 to 18 kt becoming N 21 to 26 kt in the morning. Winds could gust as high as 35 kt. Showers likely and possibly a thunderstorm before noon, then a chance of showers. Seas 2 to 4 ft.

Monday Night

N wind 24 to 26 kt, with gusts as high as 35 kt. A slight chance of showers. Seas 4 ft building to 7 ft.

Tuesday

N wind 14 to 23 kt, with gusts as high as 32 kt. Mostly cloudy. Seas 7 ft subsiding to 3 ft.

Winds and seas 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.