Last Update: 1259 AM CST Sun Dec 7 2025

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Brownsville, TX Local Forecast Office

10NM N Port Isabel TX

Marine Zone Forecast


Today
West winds around 5 knots, becoming north late this afternoon. Smooth on the bay, increasing to light chop late this afternoon. Areas of dense fog early this morning. Patchy fog late this morning.
Tonight
North winds 15 to 20 knots with gusts up to 30 knots, increasing to 20 to 25 knots with gusts up to 30 knots early in the morning. Choppy on the bay, increasing to rough early in the morning.
Monday
North winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Rough on the bay, diminishing to choppy in the afternoon.
Monday Night
Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the late evening and overnight. A moderate chop on the bay, diminishing to light chop in the late evening and overnight.
Tuesday
Northeast winds around 5 knots, becoming east in the afternoon. Smooth on the bay.
Tuesday Night
Southeast winds 5 to 10 knots, becoming south after midnight. Light chop on the bay.
Wednesday
South winds 10 to 15 knots. A moderate chop on the bay.
Wednesday Night
South winds 10 to 15 knots. A moderate chop on the bay.
Thursday
South winds 10 to 15 knots. A moderate chop on the bay.
Thursday Night
South winds around 10 knots. Light chop on the bay.



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1259 AM CST Sun Dec 7 2025
 
 

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