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| NWS Forecast for: Coastal waters from Port Mansfield TX to the Rio Grande River out 20 NM (GMZ150) Issued by: National Weather Service Brownsville, TX Last Update: 1240 AM CDT Mon Sep 1 2025 |  |
| Today: South winds around 5 knots, becoming northwest around 5 knots late this morning, then becoming northeast this afternoon. Seas 1 to 2 feet. Wave detail: southeast 1 foot at 4 seconds and east 1 foot at 8 seconds. A slight chance of showers and thunderstorms. Tonight: East winds 5 to 10 knots, becoming southeast after midnight, then becoming west early in the morning. Seas 1 to 2 feet. Wave detail: northeast 1 foot at 3 seconds and southeast 1 foot at 8 seconds. A slight chance of showers and thunderstorms after midnight. A chance of showers and thunderstorms early in the morning. Tuesday: Northwest winds 5 to 10 knots, becoming north in the afternoon. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 4 seconds and southeast 1 foot at 4 seconds. A chance of showers and thunderstorms until late afternoon, then a slight chance of showers and thunderstorms late in the afternoon. Tuesday Night: Northeast winds 5 to 10 knots, becoming east after midnight, then becoming northeast early in the morning. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 4 seconds and east 1 foot at 8 seconds. A slight chance of showers. A slight chance of thunderstorms early in the evening. A slight chance of thunderstorms after midnight. Wednesday: North winds 5 to 10 knots, becoming northeast late in the afternoon. Seas 1 to 2 feet. Wave detail: northwest 1 foot at 3 seconds and east 1 foot at 6 seconds. A slight chance of showers early in the morning. Wednesday Night: East winds around 10 knots, becoming southeast late in the evening, then becoming southeast 5 to 10 knots after midnight, becoming south early in the morning. Seas 2 to 3 feet. Wave detail: east 1 foot at 4 seconds and east 1 foot at 7 seconds. Thursday: Southwest winds around 5 knots, becoming east in the afternoon. Seas 1 to 2 feet. Thursday Night: Southeast winds around 10 knots, becoming 5 to 10 knots after midnight. Seas 1 to 2 feet. Friday: Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Friday Night: Southeast winds around 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms after midnight. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal waters from Port Mansfield TX to the Rio Grande River out 20 NM (GMZ150) | |
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