National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 151841
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
141 PM CDT Mon Jun 15 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.

GMZ100-160715
141 PM CDT Mon Jun 15 2026

SYNOPSIS
Marine conditions today will become more adverse beginning tonight and persisting through the end of the forecast. Small Craft Should Exercise Caution to Small Craft Advisory are likely to be needed beginning on Tuesday.

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GMZ130-132-135-160715
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
141 PM CDT Mon Jun 15 2026

REST OF TODAY
Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers and thunderstorms.

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

TUESDAY
South winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. A moderate chop on the bay. A chance of thunderstorms. Showers.

TUESDAY NIGHT
South winds around 10 knots, becoming southwest early in the morning. Light chop on the bay, increasing to a moderate chop early in the morning. A chance of thunderstorms. Showers likely until early morning, then a chance of showers early in the morning.

WEDNESDAY
Southwest winds 10 to 15 knots, becoming south 5 to 10 knots early in the afternoon, then increasing to 10 to 15 knots late in the afternoon. A moderate chop on the bay, diminishing to light chop early in the afternoon, then increasing to a moderate chop late in the afternoon. A chance of thunderstorms. A chance of showers.

WEDNESDAY NIGHT
South winds 10 to 15 knots. A moderate chop on the bay. A chance of showers with a slight chance of thunderstorms early in the evening, then a slight chance of showers in the late evening and overnight.

THURSDAY
South winds 15 to 20 knots. Choppy on the bay. A slight chance of showers early in the morning.

THURSDAY NIGHT
Southeast winds 15 to 20 knots. Choppy on the bay.

FRIDAY
Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers and thunderstorms late in the morning.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

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GMZ150-155-160715
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
141 PM CDT Mon Jun 15 2026

REST OF TODAY
Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms.

TONIGHT
Southeast winds 10 to 15 knots, becoming south 15 to 20 knots early in the morning. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

TUESDAY
South winds 15 to 20 knots, diminishing to 10 to 15 knots late in the afternoon. Seas 3 to 5 feet. Wave Detail: Southeast 5 feet at 6 seconds. A chance of thunderstorms. Showers.

TUESDAY NIGHT
South winds 10 to 15 knots, increasing to 15 to 20 knots early in the morning. Seas 3 to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds. A chance of thunderstorms. Showers likely in the evening, then showers after midnight.

WEDNESDAY
Southwest winds 15 to 20 knots, becoming south 10 to 15 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. A chance of thunderstorms. A chance of showers.

WEDNESDAY NIGHT
South 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 8 seconds, becoming southeast 6 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms early in the evening, then a slight chance of showers in the late evening and overnight.

THURSDAY
South winds 15 to 20 knots. Gusts to 30 knots late in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers early in the morning.

THURSDAY NIGHT
South winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet.

FRIDAY
Southeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 4 to 5 feet. A slight chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

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GMZ170-175-160715
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
141 PM CDT Mon Jun 15 2026

REST OF TODAY
Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds.

TONIGHT
Southeast winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 6 seconds. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

TUESDAY
South winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. A chance of showers in the morning. A chance of thunderstorms. Showers likely in the afternoon.

TUESDAY NIGHT
South winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 6 feet at 7 seconds. Showers likely with a chance of thunderstorms in the evening, then showers with thunderstorms likely after midnight.

WEDNESDAY
South winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Southeast 6 feet at 7 seconds. Showers and thunderstorms likely, mainly in the morning.

WEDNESDAY NIGHT
South winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Southeast 8 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms.

THURSDAY
South winds around 20 knots. Seas 6 to 9 feet, occasionally to 11 feet. A slight chance of showers in the morning.

THURSDAY NIGHT
South winds 15 to 20 knots. Seas 6 to 9 feet, occasionally to 11 feet.

FRIDAY
Southeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 6 to 8 feet, occasionally to 10 feet.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.