Chart / Forecasts

Gulf waters from Baffin Bay to Port Mansfield out 20 nm

GMZ155 · Coastal Waters Forecast · National Weather Service Brownsville TX · Issued 151 PM CDT Sat Oct 3 2026
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Forecast
Rest Of Today
North winds around 15 knots. Seas 4 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds. A chance of thunderstorms. Showers.
Tonight
Northeast winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 3 feet at 5 seconds and east 3 feet at 8 seconds. A chance of thunderstorms. Showers.
Sunday
North winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 6 seconds and north 2 feet at 3 seconds. A chance of thunderstorms. Showers.
Sunday Night
Northeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the late evening and early morning, then increasing to 15 to 20 knots early in the morning. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: North 5 feet at 5 seconds. A chance of thunderstorms. Showers.
Monday
North winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: North 6 feet at 5 seconds. Showers with a chance of thunderstorms.
Monday Night
Northeast winds 15 to 20 knots, becoming north 10 to 15 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: North 5 feet at 5 seconds. Showers with a chance of thunderstorms.
Tuesday
North winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A chance of thunderstorms. Showers.
Tuesday Night
Northeast winds 10 to 15 knots. Seas 3 to 5 feet. A chance of showers.
Wednesday
North winds around 15 knots. Seas 3 to 4 feet. A chance of showers and thunderstorms.
Wednesday Night
Northeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers. Winds and seas higher in and near thunderstorms.
Synopsis
Northerly winds are expected to continue through the forecast period with a coastal trough of low pressure settling into the lower Texas coast. Expect seas to build Sunday into Monday, with some improvement into mid-week. The chance of showers and thunderstorms remains high into Tuesday, with periods of heavy rainfall and reduced visibility.
Source: National Weather Service Coastal Waters Forecast (CWF), issued 151 PM CDT Sat Oct 3 2026, valid until Sun, 04 Oct 2026 07:15 UTC. Original text · All zones