Last Update: 227 AM CDT Sun Oct 18 2026

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Brownsville, TX Local Forecast Office

17NM NE Port Isabel TX

Marine Zone Forecast


Today
North winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: northeast 5 feet at 8 seconds and north 3 feet at 5 seconds. A slight chance of showers this morning, then a chance of showers this afternoon.
Tonight
Northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: northeast 5 feet at 9 seconds. A chance of showers early in the evening.
Monday
Northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: east 5 feet at 8 seconds. A slight chance of showers early in the morning, then a chance of showers in the afternoon.
Monday Night
East winds 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 5 feet after midnight. Wave detail: east 5 feet at 8 seconds. A slight chance of showers until early morning.
Tuesday
Northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: east 5 feet at 8 seconds. A slight chance of showers until late afternoon, then a chance of showers late in the afternoon.
Tuesday Night
Northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: east 5 feet at 8 seconds. A chance of showers. A slight chance of thunderstorms after midnight.
Wednesday
Northeast winds around 10 knots. Seas 4 to 5 feet. A slight chance of thunderstorms. A chance of showers until late afternoon, then a slight chance of showers late in the afternoon.
Wednesday Night
East winds 5 to 10 knots. Seas 3 to 5 feet. A slight chance of showers and thunderstorms early in the evening.
Thursday
Northeast winds 5 to 10 knots. Seas 3 to 4 feet.
Thursday Night
East winds 5 to 10 knots, becoming southeast after midnight. Seas 3 to 4 feet.

winds and seas higher in and near thunderstorms.




Winds and seas higher in and near thunderstorms.
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227 AM CDT Sun Oct 18 2026
 
 

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