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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 54 °F
NNW 20kt
< 1ft

Small Craft Advisory
Tuesday
High: 61 °F
NNW 19kt
< 1ft

Small Craft Advisory
Tuesday Night
Low: 60 °F
N 10kt⇓
< 1ft
Wednesday
High: 73 °F
SSE 12kt
< 1ft
Wednesday Night
Low: 71 °F
S 10kt
< 1ft
Thursday
High: 76 °F
N 15kt
< 1ft
Thursday Night
Low: 57 °F
N 16kt
< 1ft
Friday
High: 65 °F
NNW 14kt
< 1ft
Friday Night
Low: 61 °F
NNW 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:18 pm CST Dec 1, 2025
Forecast Valid: 7pm CST Dec 1, 2025-6pm CST Dec 8, 2025

View Nearby Observations

Detailed Forecast

Tonight

NNW wind 13 to 20 kt. A slight chance of showers after midnight. Seas 1 ft or less.

Tuesday

NNW wind 11 to 19 kt. Mostly cloudy. Seas 1 ft or less.

Tuesday Night

N wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Seas 1 ft or less.

Wednesday

SSE wind 6 to 12 kt. A slight chance of showers after noon. Seas 1 ft or less.

Wednesday Night

S wind 7 to 10 kt. A slight chance of showers. Seas 1 ft or less.

Thursday

S wind 7 to 15 kt becoming N in the afternoon. A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Seas 1 ft or less.

Thursday Night

N wind around 16 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Friday

NNW wind 11 to 14 kt. A chance of showers. Seas 1 ft or less.

Friday Night

NNW wind 8 to 10 kt. A 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.