National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 210650
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1250 AM CST Wed Jan 21 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.

GMZ100-211915
1250 AM CST Wed Jan 21 2026

SYNOPSIS
Favorable conditions will prevail through the rest of the week. Rain chances continue today through Thursday. A strong cold front will arrive this weekend and bring Small Craft Advisories along the Lower Texas Coast Saturday into Sunday. Precipitation chances return Friday night and linger into Monday.

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GMZ130-132-135-211915
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
1250 AM CST Wed Jan 21 2026

TODAY
South winds 5 to 10 knots, becoming southeast late this afternoon. Light chop on the bay. Showers likely, mainly this morning.

TONIGHT
East winds around 5 knots. Smooth on the bay. A slight chance of showers in the evening.

THURSDAY
East winds around 5 knots, increasing to 5 to 10 knots in the afternoon. Light chop on the bay.

THURSDAY NIGHT
Southeast winds 5 to 10 knots. Light chop on the bay.

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

FRIDAY NIGHT
Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers in the evening, then a chance of showers and thunderstorms after midnight.

SATURDAY
Northeast winds 10 to 15 knots, becoming northwest in the afternoon, then becoming north 15 to 20 knots late in the afternoon. A moderate chop on the bay, increasing to choppy late in the afternoon. A chance of showers.

SATURDAY NIGHT
North winds 15 to 20 knots. Choppy on the bay. A chance of showers.

SUNDAY
North winds 15 to 20 knots. Choppy on the bay. A chance of drizzle, showers with a slight chance of freezing drizzle in the morning, then a slight chance of showers in the afternoon.

SUNDAY NIGHT
North winds 15 to 20 knots. Choppy on the bay. A slight chance of showers and drizzle.

Winds and waves higher in and near thunderstorms.

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GMZ150-155-211915
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
1250 AM CST Wed Jan 21 2026

TODAY
South winds 5 to 10 knots, becoming southeast late this afternoon. Seas 3 to 4 feet. Wave Detail: East 3 feet at 7 seconds. Showers likely until late afternoon, then a chance of showers late this afternoon.

TONIGHT
East winds around 5 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 7 seconds. A chance of showers in the evening. A slight chance of thunderstorms after midnight. A slight chance of showers after midnight.

THURSDAY
Southeast winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 7 seconds. A slight chance of showers.

THURSDAY NIGHT
Southeast winds around 10 knots, becoming south early in the morning. Seas 3 to 4 feet. Wave Detail: East 3 feet at 8 seconds.

FRIDAY
Southeast winds around 10 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 8 seconds. A slight chance of showers in the afternoon.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 8 seconds. A chance of showers. A slight chance of drizzle late in the evening. A chance of thunderstorms after midnight.

SATURDAY
East winds 10 to 15 knots, becoming north 15 to 20 knots in the afternoon. Seas 3 to 4 feet, building to 4 to 6 feet, occasionally to 8 feet in the afternoon. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers in the afternoon.

SATURDAY NIGHT
North winds 15 to 20 knots, increasing to 20 to 25 knots early in the morning. Seas 7 to 10 feet, occasionally to 13 feet. Showers likely.

SUNDAY
North winds 20 to 25 knots. Seas 8 to 11 feet, occasionally to 14 feet. A chance of drizzle in the morning. A chance of showers.

SUNDAY NIGHT
North winds around 20 knots. Seas 6 to 9 feet, occasionally to 11 feet. A chance of drizzle in the evening, then a slight chance of showers and drizzle after midnight.

Winds and seas higher in and near thunderstorms.

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GMZ170-175-211915
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
1250 AM CST Wed Jan 21 2026

TODAY
South winds 10 to 15 knots, becoming southeast 5 to 10 knots late this afternoon. Seas 4 to 5 feet. Wave Detail: East 4 feet at 7 seconds. Showers until late afternoon. A slight chance of thunderstorms late this morning. A chance of showers late this afternoon.

TONIGHT
Southeast winds 5 to 10 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 7 seconds. A chance of showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 3 to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. A chance of showers, mainly in the morning.

THURSDAY NIGHT
Southeast winds around 10 knots, becoming south early in the morning. Seas 3 to 5 feet. Wave Detail: East 4 feet at 8 seconds and south 1 foot at 5 seconds.

FRIDAY
Southeast winds around 10 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 8 seconds. A slight chance of showers.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 8 seconds and southeast 2 feet at 4 seconds. A slight chance of showers in the evening. A chance of drizzle late in the evening, then a chance of showers and thunderstorms after midnight.

SATURDAY
Southeast winds 10 to 15 knots, becoming north 15 to 20 knots in the afternoon. Seas 3 to 5 feet, building to 5 to 7 feet, occasionally to 9 feet in the afternoon. A slight chance of thunderstorms in the morning. Showers likely.

SATURDAY NIGHT
North winds 15 to 20 knots, increasing to 20 to 25 knots with gusts up to 30 knots early in the morning. Seas 6 to 9 feet, occasionally to 11 feet, building to 8 to 11 feet, occasionally to 14 feet after midnight. Drizzle likely in the evening. Showers likely.

SUNDAY
North winds 20 to 25 knots. Seas 8 to 11 feet, occasionally to 14 feet. Showers likely.

SUNDAY NIGHT
North winds 20 to 25 knots. Seas 6 to 9 feet, occasionally to 11 feet. A chance of showers and drizzle.

Winds and seas higher in and near thunderstorms.