Last Update: 1203 PM CST Sat Nov 8 2025

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Brownsville, TX Local Forecast Office

35NM E Port Isabel TX

Marine Zone Forecast


Tonight
South winds around 10 knots, becoming southwest after midnight. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 6 seconds.
Sunday
North winds 20 to 25 knots, increasing to 25 to 30 knots in the afternoon. Seas 3 to 5 feet, building to 6 to 9 feet, occasionally to 11 feet in the afternoon. Wave detail: north 9 feet at 8 seconds and southwest 5 feet at 4 seconds. A slight chance of showers and thunderstorms until late afternoon.
Sunday Night
North winds 25 to 30 knots. Seas 9 to 13 feet, occasionally to 17 feet. Wave detail: north 12 feet at 8 seconds.
Monday
North winds 20 to 25 knots. Seas 8 to 13 feet, occasionally to 17 feet, subsiding to 7 to 10 feet, occasionally to 13 feet in the afternoon. Wave detail: north 12 feet at 8 seconds and north 5 feet at 4 seconds.
Monday Night
Northeast winds 10 to 15 knots, becoming east 5 to 10 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: north 5 feet at 7 seconds.
Tuesday
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Wave detail: east 4 feet at 7 seconds and southeast 2 feet at 4 seconds.
Tuesday Night
South winds 15 to 20 knots. Seas 3 to 5 feet.
Wednesday
South winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet.
Wednesday Night
South winds around 15 knots. Seas 3 to 5 feet.
Thursday
Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
Thursday Night
Southeast winds 10 to 15 knots. Seas 3 to 4 feet.

winds and seas higher in and near thunderstorms.



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1203 PM CST Sat Nov 8 2025
 
 

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