National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 281926
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
226 PM CDT Mon Sep 28 2026

Lower Texas coastal waters from Baffin Bay to the mouth of the Rio Grande out 60 NM.

Seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 10 percent of the waves.

GMZ100-290815
226 PM CDT Mon Sep 28 2026

SYNOPSIS
Favorable marine conditions will occur along the Lower Texas Coast today and tonight with light to moderate winds and low to moderate seas. More adverse winds and seas may result in Small Craft Should Exercise Caution or Small Craft Advisory beginning Tuesday into Tuesday night ahead of a front. Daily low rain chances continue through Wednesday, increasing to moderate to high Thursday night into the weekend.

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GMZ130-132-135-290815
Laguna Madre from the Port of Brownsville to the Arroyo Colorado
Laguna Madre from the Arroyo Colorado To 5 NM north of Port Mansfield TX
Laguna Madre from 5 nm north of Port Mansfield to Baffin Bay TX
226 PM CDT Mon Sep 28 2026

TONIGHT
Southeast winds 10 to 15 knots, becoming around 10 knots after midnight. A moderate chop on the bay.

TUESDAY
Southeast winds 10 to 15 knots, increasing to 15 to 20 knots late in the afternoon. A moderate chop on the bay, increasing to choppy late in the afternoon. A slight chance of showers and thunderstorms late in the morning.

TUESDAY NIGHT
Southeast winds 15 to 20 knots. Choppy on the bay. A slight chance of showers after midnight.

WEDNESDAY
Southeast winds 15 to 20 knots. Gusts to 30 knots in the afternoon. Choppy on the bay.

WEDNESDAY NIGHT
Southeast winds 15 to 20 knots with gusts up to 30 knots, increasing to 20 to 25 knots with gusts up to 30 knots after midnight, then diminishing to 15 to 20 knots with gusts up to 30 knots early in the morning. Choppy on the bay, increasing to rough after midnight, then diminishing to choppy early in the morning. A slight chance of showers early in the morning.

THURSDAY
Southeast winds 15 to 20 knots. Choppy on the bay. A chance of showers and thunderstorms in the afternoon.

THURSDAY NIGHT
Southeast winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. A moderate chop on the bay. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

FRIDAY
Southeast winds 5 to 10 knots, becoming east in the afternoon. Light chop on the bay. Showers likely with a chance of thunderstorms.

FRIDAY NIGHT
East winds 5 to 10 knots, becoming northeast early in the morning. Light chop on the bay. Showers with a chance of thunderstorms until early morning, then showers with a slight chance of thunderstorms early in the morning.

SATURDAY
North winds 5 to 10 knots, becoming northeast late in the afternoon. Light chop on the bay. Showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon.

SATURDAY NIGHT
Northeast winds 5 to 10 knots. Light chop on the bay. A chance of thunderstorms in the evening. Showers likely. A slight chance of thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

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GMZ150-155-290815
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
226 PM CDT Mon Sep 28 2026

TONIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. A slight chance of showers and thunderstorms early this morning.

TUESDAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. A slight chance of showers and thunderstorms until late afternoon.

TUESDAY NIGHT
Southeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: Southeast 4 feet at 5 seconds. A slight chance of showers after midnight.

WEDNESDAY
Southeast winds 15 to 20 knots. Gusts to 30 knots late in the afternoon. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. A slight chance of showers early in the morning.

WEDNESDAY NIGHT
Southeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 6 feet at 6 seconds. A slight chance of showers after midnight. A slight chance of showers and thunderstorms early in the morning.

THURSDAY
Southeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 5 feet in the afternoon. Wave Detail: Southeast 6 feet at 7 seconds, becoming southeast 5 feet at 7 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon.

THURSDAY NIGHT
Southeast winds 10 to 15 knots. Seas 4 to 5 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

FRIDAY
Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon, then becoming east late in the afternoon. Seas 3 to 5 feet. A chance of thunderstorms. Showers likely.

FRIDAY NIGHT
East winds 5 to 10 knots. Seas 3 to 4 feet. Showers with a chance of thunderstorms until early morning, then showers with a slight chance of thunderstorms early in the morning.

SATURDAY
Northeast winds 5 to 10 knots. Seas 3 to 4 feet. Showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon.

SATURDAY NIGHT
Northeast winds around 10 knots. Seas 3 to 4 feet. A chance of thunderstorms in the evening. Showers likely. A slight chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

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GMZ170-175-290815
Gulf waters from Port Mansfield to the Rio Grande extending from 20 to 60 nm
Gulf waters from Baffin Bay to Port Mansfield extending from 20 to 60 nm
226 PM CDT Mon Sep 28 2026

TONIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. A slight chance of showers and thunderstorms early this morning.

TUESDAY
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight chance of thunderstorms.

TUESDAY NIGHT
Southeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: Southeast 5 feet at 5 seconds. A slight chance of showers and thunderstorms early in the morning.

WEDNESDAY
Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 6 seconds. A slight chance of showers and thunderstorms in the morning.

WEDNESDAY 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 6 seconds, becoming southeast 6 feet at 6 seconds. A slight chance of showers and thunderstorms after midnight.

THURSDAY
Southeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Southeast 6 feet at 7 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon.

THURSDAY NIGHT
Southeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A chance of showers and thunderstorms.

FRIDAY
Southeast winds 10 to 15 knots, becoming east in the afternoon. Seas 4 to 5 feet. Showers likely with a chance of thunderstorms.

FRIDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 5 feet. A chance of thunderstorms in the evening. Showers likely. A slight chance of thunderstorms after midnight.

SATURDAY
Northeast winds around 10 knots. Seas 3 to 4 feet. Showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon.

SATURDAY NIGHT
Northeast winds 10 to 15 knots. Seas 4 to 5 feet. A chance of thunderstorms in the evening. Showers likely. A slight chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.