Coastal Waters Forecast for Coastal waters from Port Mansfield TX to the Rio Grande River out 20 NM (GMZ150) (Text-Only)
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: 1232 AM CDT Wed Apr 1 2026
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Today: Southeast winds 10 to 15 knots, increasing to 15 to 20 knots this afternoon. Seas 3 to 5 feet. Wave detail: southeast 4 feet at 7 seconds.

Tonight: Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave detail: southeast 5 feet at 7 seconds.

Thursday: Southeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: southeast 5 feet at 7 seconds.

Thursday Night: Southeast winds around 15 knots. Seas 4 to 5 feet. Wave detail: southeast 5 feet at 7 seconds. A slight chance of showers after midnight.

Friday: Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave detail: southeast 5 feet at 8 seconds. A slight chance of showers early in the morning.

Friday Night: Southeast winds 15 to 20 knots. Seas 4 to 5 feet, building to 5 to 7 feet, occasionally to 9 feet after midnight. Wave detail: southeast 5 feet at 7 seconds, becoming southeast 6 feet at 8 seconds. A slight chance of showers.

Saturday: Southeast winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers in the afternoon.

Saturday Night: East winds 10 to 15 knots, becoming northeast early in the morning. Seas 4 to 5 feet. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight.

Sunday: Northeast winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 6 to 8 feet, occasionally to 10 feet. Showers likely with a slight chance of thunderstorms until late afternoon, then showers likely late in the afternoon.

Sunday Night: Northeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of thunderstorms. Showers likely, mainly in the evening.

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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