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- WE ARE HIRING: NWS Brownsville/Rio Grande Valley is officially hiring a GS-5/7/9 Meteorologist. Apply today at USAJobs!
- October 1-7 Rainfall Improves Long-Term Drought, but Severe to Extreme Conditions Remain for Some. Click Here for Details.
- New: October-December2026 Outlook - After a brutally hot and dry September, October brings the pattern change to wetter and less hot, with above average rainfall to close out 2026; flash flooding, water supply, & hazardous marine conditions in focus
Last Update: 206 AM CDT Tue Oct 13 2026
For More Weather Information:
17NM NE Port Isabel TX
Marine Zone Forecast
Today
Southeast winds around 15 knots. Seas 3 to 4 feet. Wave detail: southeast 4 feet at 6 seconds.
Tonight
Southeast winds around 15 knots. Seas 3 to 4 feet. Wave detail: southeast 4 feet at 6 seconds.
Wednesday
Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave detail: southeast 4 feet at 6 seconds.
Wednesday Night
Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave detail: southeast 5 feet at 6 seconds.
Thursday
Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave detail: southeast 4 feet at 7 seconds.
Thursday Night
East winds 5 to 10 knots. Seas 3 to 4 feet. Wave detail: east 3 feet at 6 seconds. A slight chance of showers after midnight.
Friday
Northeast winds 5 to 10 knots, increasing to 15 to 20 knots with gusts up to 30 knots. Seas 3 to 4 feet, building to 4 to 6 feet, occasionally to 8 feet 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 20 to 25 knots with gusts up to 35 knots, increasing to 25 to 30 knots with gusts up to 40 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet, building to 8 to 11 feet, occasionally to 14 feet after midnight. Showers likely with a chance of thunderstorms early in the evening, then showers likely with a slight chance of thunderstorms in the late evening and overnight.
Saturday
North winds 25 to 30 knots, becoming northeast 20 to 25 knots late in the afternoon. Seas 10 to 14 feet, occasionally to 18 feet, subsiding to 8 to 13 feet, occasionally to 17 feet in the afternoon. Showers likely with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.
Saturday Night
Northeast winds 20 to 25 knots with gusts up to 30 knots, diminishing to 15 to 20 knots in the late evening and overnight. Seas 6 to 9 feet, occasionally to 11 feet, subsiding to 4 to 6 feet, occasionally to 8 feet after midnight. A chance of showers with a slight chance of thunderstorms early in the evening, then a slight chance of showers in the late evening and overnight. A slight chance of thunderstorms after midnight.
winds and seas higher in and near thunderstorms.
winds and seas higher in and near thunderstorms.
Winds and seas higher in and near thunderstorms.
Additional Forecasts and Information
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