National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 070723
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
223 AM CDT Mon Sep 7 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.

GMZ100-072015
223 AM CDT Mon Sep 7 2026

SYNOPSIS
Gentle to moderate southeasterly to southerly winds and slight to moderate seas continue, with low to medium chances of showers and thunderstorms developing by the middle of the week.

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GMZ130-132-135-072015
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
223 AM CDT Mon Sep 7 2026

TODAY
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots this afternoon. A moderate chop on the bay.

TONIGHT
Southeast winds 10 to 15 knots, becoming south 5 to 10 knots after midnight. Light chop on the bay.

TUESDAY
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots. Light chop on the bay, increasing to a moderate chop.

TUESDAY NIGHT
Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Light chop on the bay.

WEDNESDAY
Southeast winds around 5 knots, becoming 5 to 10 knots in the afternoon. Light chop on the bay. A slight chance of showers until late afternoon. A slight chance of thunderstorms in the afternoon. A chance of showers late in the afternoon.

WEDNESDAY NIGHT
Southeast winds around 10 knots, becoming south after midnight. Light chop on the bay. A chance of showers with a slight chance of thunderstorms early in the evening.

THURSDAY
South winds around 5 knots, becoming southeast early in the afternoon, then increasing to 10 to 15 knots late in the afternoon. Smooth on the bay, increasing to light chop early in the afternoon, then increasing to a moderate chop late in the afternoon.

THURSDAY NIGHT
Southeast winds 10 to 15 knots, becoming south after midnight. A moderate chop on the bay.

FRIDAY
South winds around 10 knots, becoming southeast early in the afternoon, then increasing to 15 to 20 knots late in the afternoon. Light chop on the bay, increasing to a moderate chop early in the afternoon, then increasing to choppy late in the afternoon.

FRIDAY NIGHT
Southeast winds 15 to 20 knots, becoming south 10 to 15 knots early in the morning. Choppy on the bay, diminishing to a moderate chop early in the morning.

Winds and waves higher in and near thunderstorms.

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GMZ150-155-072015
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
223 AM CDT Mon Sep 7 2026

TODAY
South winds 5 to 10 knots, becoming southeast this afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 5 seconds.

TONIGHT
Southeast winds around 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds.

TUESDAY
Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 5 seconds.

TUESDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds.

WEDNESDAY
Southeast winds around 5 knots, becoming 5 to 10 knots late in the afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. A slight chance of showers and thunderstorms.

WEDNESDAY NIGHT
Southeast winds around 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds.

THURSDAY
South winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet.

THURSDAY NIGHT
Southeast winds 10 to 15 knots, becoming south after midnight. Seas 2 to 3 feet.

FRIDAY
South winds 10 to 15 knots, becoming southeast late in the afternoon. Seas 2 to 3 feet.

FRIDAY NIGHT
South winds 15 to 20 knots. Seas 2 to 4 feet.

Winds and seas higher in and near thunderstorms.

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GMZ170-175-072015
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
223 AM CDT Mon Sep 7 2026

TODAY
South winds 5 to 10 knots, becoming southeast this afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 5 seconds.

TONIGHT
Southeast winds around 10 knots, becoming south early in the morning. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds.

TUESDAY
South winds 5 to 10 knots, becoming southeast in the afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. A slight chance of showers and thunderstorms early in the morning. A slight chance of showers and thunderstorms in the afternoon.

TUESDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight.

WEDNESDAY
Southeast winds 5 to 10 knots, becoming around 5 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. A chance of showers.

WEDNESDAY NIGHT
Southeast winds 5 to 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms early in the evening.

THURSDAY
South winds 5 to 10 knots, becoming southeast late in the afternoon. Seas 2 to 3 feet. A chance of showers and thunderstorms until late afternoon.

THURSDAY NIGHT
Southeast winds 5 to 10 knots, becoming south 10 to 15 knots in the late evening and overnight. Seas 2 to 3 feet.

FRIDAY
South winds 10 to 15 knots. Seas 2 to 3 feet.

FRIDAY NIGHT
Southeast winds 10 to 15 knots, becoming south 15 to 20 knots in the late evening and overnight. Seas 2 to 4 feet.

Winds and seas higher in and near thunderstorms.