Coastal Waters Forecast for Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM (GMZ155) (Text-Only)
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: 220 AM CDT Mon Oct 12 2026
Print


Today: Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: east 4 feet at 6 seconds.

Tonight: Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: southeast 4 feet at 6 seconds.

Tuesday: Southeast winds around 15 knots. Seas 3 to 4 feet. Wave detail: southeast 4 feet at 6 seconds.

Tuesday Night: Southeast winds around 15 knots. Seas 3 to 4 feet. Wave detail: southeast 4 feet at 6 seconds.

Wednesday: Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave detail: southeast 4 feet at 6 seconds.

Wednesday Night: Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave detail: southeast 5 feet at 6 seconds.

Thursday: Southeast winds 10 to 15 knots. Seas 3 to 5 feet.

Thursday Night: East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 4 feet. A slight chance of showers early in the morning.

Friday: Northeast winds 5 to 10 knots, increasing to 20 to 25 knots with gusts up to 30 knots. Seas 3 to 4 feet, building to 4 to 6 feet, occasionally to 8 feet in the afternoon. A chance of showers. A slight chance of thunderstorms in the afternoon.

Friday Night: Northeast winds 20 to 25 knots, becoming north 25 to 30 knots after midnight. Seas 6 to 9 feet, occasionally to 11 feet, building to 8 to 11 feet, occasionally to 14 feet after midnight. Showers likely with a slight chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

winds and seas higher in and near thunderstorms.







Zone Forecast: Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM (GMZ155)

Visit your local NWS office at: https://www.weather.gov/bro