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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Friday
High: 72 °F
SE 13kt
2ft
Friday Night
Low: 69 °F
ESE 13kt
2ft
Saturday
High: 74 °F
S 17kt
2ft
Saturday Night
Low: 50 °F
NNW 18kt
2ft
Sunday
High: 52 °F
N 23kt
2-4ft
Sunday Night
Low: 40 °F
N 23kt
4-6ft
Monday
High: 51 °F
NNW 22kt
6ft
Monday Night
Low: 47 °F
NNE 13kt
3-4ft
Tuesday
High: 64 °F
ESE 11kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:30 am CST Jan 23, 2026
Forecast Valid: 3am CST Jan 23, 2026-6pm CST Jan 29, 2026

View Nearby Observations

Detailed Forecast

Friday

SE wind 9 to 13 kt. Partly sunny. Seas around 2 ft.

Friday Night

ESE wind around 13 kt. A slight chance of showers and thunderstorms, mainly between midnight and 4am. Patchy fog between 2am and 5am. Seas around 2 ft.

Saturday

S wind 13 to 17 kt. A slight chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and noon, then a chance of showers and thunderstorms after noon. Patchy fog before 7am. Seas around 2 ft.

Saturday Night

SSE wind 15 to 18 kt becoming NNW in the evening. A chance of showers and thunderstorms. Seas around 2 ft.

Sunday

N wind 19 to 23 kt. A slight chance of showers before noon. Seas 2 to 4 ft.

Sunday Night

N wind around 23 kt. Mostly cloudy. Seas 4 to 6 ft.

Monday

NNW wind 14 to 22 kt. Mostly cloudy. Seas 6 ft subsiding to 3 ft.

Monday Night

NNE wind 8 to 13 kt. Mostly cloudy. Seas 3 to 4 ft.

Tuesday

NE wind 8 to 11 kt becoming SE in the afternoon. Partly sunny. Seas 2 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.