National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 170706
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
206 AM CDT Mon Aug 17 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.

GMZ100-172030
206 AM CDT Mon Aug 17 2026

SYNOPSIS
Generally favorable marine conditions are expected along the Lower Texas Coast through the next several days, with light to moderate winds and low to moderate seas in place. However, winds may briefly increase over the Laguna Madre later this week, requiring Small Craft Should Exercise Caution.

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GMZ130-132-135-172030
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
206 AM CDT Mon Aug 17 2026

TODAY
Southeast winds around 5 knots, increasing to 10 to 15 knots. A light chop on the bay, increasing to a moderate chop on the bay.

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

TUESDAY
South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. A moderate chop on the bay.

TUESDAY NIGHT
Southeast winds 10 to 15 knots, becoming south 5 to 10 knots early in the morning. A moderate chop on the bay, diminishing to a light chop on the bay early in the morning.

WEDNESDAY
South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. A moderate chop on the bay.

WEDNESDAY NIGHT
Southeast winds 10 to 15 knots. A moderate chop on the bay.

THURSDAY
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 bay waters late in the afternoon.

THURSDAY NIGHT
Southeast winds 15 to 20 knots, becoming south 10 to 15 knots in the late evening and overnight. Choppy bay waters, diminishing to a moderate chop on the bay in the late evening and overnight.

FRIDAY
South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. A moderate chop on the bay.

FRIDAY NIGHT
Southeast winds 10 to 15 knots, becoming south 5 to 10 knots early in the morning. A moderate chop on the bay, diminishing to a light chop on the bay early in the morning.

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GMZ150-155-172030
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
206 AM CDT Mon Aug 17 2026

TODAY
Southeast winds around 5 knots, increasing to 5 to 10 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds.

TONIGHT
Southeast winds around 10 knots, becoming south early in the morning. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds.

TUESDAY
South winds 5 to 10 knots, becoming southeast 10 to 15 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and east 1 foot at 8 seconds.

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 1 foot at 9 seconds.

WEDNESDAY
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and southeast 2 feet at 8 seconds.

WEDNESDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds.

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

THURSDAY NIGHT
Southeast winds 10 to 15 knots. 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 early in the morning. Seas 2 to 3 feet.

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GMZ170-175-172030
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
206 AM CDT Mon Aug 17 2026

TODAY
Southeast winds around 5 knots, becoming 5 to 10 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. A slight chance of showers and thunderstorms this afternoon. A slight chance of showers late this afternoon.

TONIGHT
Southeast winds around 10 knots, becoming south early in the morning. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds.

TUESDAY
South winds around 10 knots, becoming 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: South 1 foot at 4 seconds and southeast 1 foot at 8 seconds.

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 1 foot at 9 seconds.

WEDNESDAY
South winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 1 foot at 8 seconds.

WEDNESDAY NIGHT
Southeast winds 10 to 15 knots, becoming south early in the morning. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds.

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

THURSDAY NIGHT
South winds 10 to 15 knots. Seas 2 to 4 feet.

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

FRIDAY NIGHT
Southeast winds 10 to 15 knots, becoming south early in the morning. Seas 2 to 4 feet.

Winds and seas higher in and near thunderstorms.