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: 325 PM CDT Tue Mar 31 2026
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Today: Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 7 seconds.

Tonight: Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 3 feet at 7 seconds.

Wednesday: Southeast winds 10 to 15 knots, increasing to 15 to 20 knots late in the afternoon. Seas 3 to 5 feet. Wave detail: southeast 4 feet at 7 seconds. A slight chance of showers late in the morning.

Wednesday Night: 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.

Friday: Southeast winds 10 to 15 knots. Seas 4 to 5 feet.

Friday Night: Southeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet.

Saturday: Southeast winds 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 5 feet in the afternoon. A slight chance of showers in the afternoon.

Saturday Night: East winds 10 to 15 knots, becoming northeast 15 to 20 knots 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.

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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