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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Overnight
Low: 63 °F
NNW 13kt
< 1ft
Saturday
High: 70 °F
N 24kt
< 1ft

Small Craft Advisory
Saturday Night
Low: 54 °F
N 24kt
< 1ft

Small Craft Advisory
Sunday
High: 61 °F
N 22kt
< 1ft
Sunday Night
Low: 55 °F
N 15kt
< 1ft
Monday
High: 64 °F
N 12kt
< 1ft
Monday Night
Low: 56 °F
NNE 10kt
< 1ft
Tuesday
High: 64 °F
NE 8kt
< 1ft
Tuesday Night
Low: 56 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 11:00 pm CST Jan 9, 2026
Forecast Valid: 11pm CST Jan 9, 2026-6pm CST Jan 16, 2026

View Nearby Observations

Detailed Forecast

Overnight

S wind 5 to 13 kt becoming NNW after midnight. A slight chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 5am, then showers likely and possibly a thunderstorm after 5am. Patchy fog. Seas 1 ft or less.

Saturday

N wind 16 to 24 kt, with gusts as high as 30 kt. A chance of showers and thunderstorms, mainly before 7am. Seas 1 ft or less.

Saturday Night

N wind around 24 kt. Mostly cloudy. Seas 1 ft or less.

Sunday

N wind 16 to 22 kt. Mostly cloudy. Seas 1 ft or less.

Sunday Night

N wind 12 to 15 kt. Cloudy. Seas 1 ft or less.

Monday

N wind around 12 kt. A slight chance of showers. Seas 1 ft or less.

Monday Night

NNE wind 6 to 10 kt. A slight chance of showers. Seas 1 ft or less.

Tuesday

NE wind 6 to 8 kt. Mostly cloudy. Seas 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

*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.