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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 60 °F
NNW 16kt
< 1ft

Small Craft Advisory
Tonight
Low: 59 °F
NNE 8kt⇓
< 1ft
Wednesday
High: 75 °F
SSE 12kt
< 1ft
Wednesday Night
Low: 70 °F
SE 10kt
< 1ft
Thursday
High: 76 °F
NNW 15kt
< 1ft
Thursday Night
Low: 56 °F
N 17kt
< 1ft
Friday
High: 62 °F
NNW 13kt
< 1ft
Friday Night
Low: 58 °F
N 9kt
< 1ft
Saturday
High: 70 °F
N 11kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:00 pm CST Dec 2, 2025
Forecast Valid: 12pm CST Dec 2, 2025-6pm CST Dec 8, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

NNW wind 10 to 16 kt. Mostly cloudy. Seas 1 ft or less.

Tonight

NNE wind 5 to 8 kt becoming variable and less than 5 kt. Mostly cloudy. Seas 1 ft or less.

Wednesday

SE wind 5 to 12 kt becoming S in the morning. A slight chance of showers before 4pm, then a chance of showers after 5pm. Seas 1 ft or less.

Wednesday Night

SE wind 8 to 10 kt becoming S after midnight. A slight chance of showers before midnight, then a slight chance of showers and thunderstorms between midnight and 3am, then a slight chance of showers after 3am. Seas 1 ft or less.

Thursday

S wind 8 to 15 kt becoming N in the afternoon. A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers likely after 3pm. Seas 1 ft or less.

Thursday Night

N wind 14 to 17 kt. Showers likely before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Seas 1 ft or less.

Friday

NNW wind 10 to 13 kt. A slight chance of showers before noon. Seas 1 ft or less.

Friday Night

N wind around 9 kt. A chance of showers. Seas 1 ft or less.

Saturday

NNW wind 9 to 11 kt becoming NNE in the afternoon. A slight chance of showers. 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.