| 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: 1202 PM CST Fri Dec 26 2025 |  |
| Tonight: South winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 7 seconds. Saturday: Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 6 seconds. Saturday Night: South winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 6 seconds. Sunday: South winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 6 seconds. Sunday Night: Southeast winds 10 to 15 knots increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms after midnight. Monday: North winds 20 to 25 knots increasing to 25 to 30 knots in the afternoon. Seas 4 to 6 feet, with occasional seas up to 7 feet building to 7 to 10 feet, with occasional seas up to 13 feet in the afternoon. Wave detail: east 5 feet at 6 seconds becoming northeast 10 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. Monday Night: North winds 20 to 25 knots with gusts up to 35 knots. Seas 9 to 12 feet, with occasional seas up to 15 feet. Tuesday: North winds 15 to 20 knots. Gusts to 30 knots in the morning. Seas 8 to 11 feet, with occasional seas up to 14 feet subsiding to 6 to 8 feet, with occasional seas up to 9 feet in the afternoon. Tuesday Night: North winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Seas 4 to 6 feet, with occasional seas up to 7 feet subsiding to 3 to 4 feet after midnight. Wednesday: Northeast winds around 5 knots becoming east in the afternoon. Seas 2 to 3 feet. Wednesday Night: Southeast winds 5 to 10 knots becoming south after midnight. Seas 2 to 3 feet. 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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