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| NWS Forecast for: Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM (GMZ155) Issued by: National Weather Service Brownsville, TX Last Update: 223 AM CDT Sun Sep 20 2026 | |
| Today: South winds around 5 knots, becoming northeast this afternoon, then becoming east late this afternoon. Seas 2 to 4 feet. Wave detail: east 3 feet at 7 seconds. A slight chance of showers and thunderstorms late this morning. Tonight: Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Wave detail: east 3 feet at 6 seconds. Monday: South winds around 5 knots, becoming east in the afternoon. Seas 2 to 3 feet. Wave detail: east 2 feet at 6 seconds. A slight chance of showers late in the morning. Monday Night: East winds 5 to 10 knots, becoming southeast early in the morning. Seas 2 to 3 feet. Wave detail: east 2 feet at 5 seconds. Tuesday: East winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: east 2 feet at 5 seconds. A slight chance of thunderstorms. A chance of showers until late afternoon, then a slight chance of showers late in the afternoon. Tuesday Night: East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave detail: east 2 feet at 5 seconds. A slight chance of showers and thunderstorms early in the evening. A slight chance of showers and thunderstorms after midnight. Wednesday: East winds 5 to 10 knots. Seas 2 to 3 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 10 to 15 knots, diminishing to 5 to 10 knots early in the morning. Seas 2 to 3 feet. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Thursday: East winds 5 to 10 knots, increasing to 10 to 15 knots late in the afternoon. Seas 2 to 3 feet. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Thursday Night: East winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM (GMZ155) | |
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