Last Update: 202 PM CDT Wed Sep 30 2026

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Brownsville, TX Local Forecast Office

10NM N Port Isabel TX

Marine Zone Forecast


Tonight
Southeast winds 15 to 20 knots. Choppy on the bay. A slight chance of showers after midnight. A slight chance of showers and thunderstorms early this morning.
Thursday
Southeast winds 15 to 20 knots. Choppy on the bay. A slight chance of showers and thunderstorms late in the morning. A chance of showers and thunderstorms in the afternoon.
Thursday Night
Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of thunderstorms early in the evening. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight.
Friday
Southeast winds 5 to 10 knots, becoming east in the afternoon. Light chop on the bay, diminishing to smooth late in the morning, then increasing to light chop in the afternoon. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon.
Friday Night
Northeast winds 5 to 10 knots, becoming around 5 knots early in the morning. Light chop on the bay, diminishing to smooth early in the morning. A slight chance of thunderstorms.
Saturday
Northeast winds 5 to 10 knots. Light chop on the bay. Showers with a slight chance of thunderstorms early in the morning, then showers with a chance of thunderstorms in the afternoon.
Saturday Night
Northeast winds 5 to 10 knots. Light chop on the bay. Showers with a chance of thunderstorms.
Sunday
North winds 10 to 15 knots. A moderate chop on the bay. Showers with a chance of thunderstorms.
Sunday Night
Northeast winds 5 to 10 knots, becoming north 10 to 15 knots early in the morning. Light chop on the bay, increasing to a moderate chop early in the morning. Showers with a chance of thunderstorms.
Monday
North winds 10 to 15 knots. A moderate chop on the bay. Showers.
Monday Night
Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight, then increasing to 10 to 15 knots early in the morning. A moderate chop on the bay, diminishing to light chop after midnight, then increasing to a moderate chop early in the morning. Showers with a chance of thunderstorms early in the evening, then showers likely with a slight chance of thunderstorms in the late evening and overnight.

winds and waves higher in and near thunderstorms.




Winds and waves higher in and near thunderstorms.
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202 PM CDT Wed Sep 30 2026
 
 

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