National Weather Service Marine Forecast FZUS54 KBRO

FZUS54 KBRO 181452
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
852 AM CST Sun Jan 18 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.

GMZ100-190315
852 AM CST Sun Jan 18 2026

SYNOPSIS
Marine conditions will continue to improve today. Another larger high pressure ridge will stretch west to east from north Texas through the southeast U.S. Monday night and Tuesday, maintaining or building a long period easterly swell with moderate easterly winds with some Small Craft Exercise Caution conditions. The ridge will move eastward Tuesday night and Wednesday, with moderate south to southeast flow returning along with increasing coverage of rainfall. Another fairly strong high pressure ridge may build across the western Gulf behind the rain on Thursday and Thursday night, with potential for Small Craft Advisory conditions once again.

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GMZ130-132-135-190315
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
852 AM CST Sun Jan 18 2026

SMALL CRAFT CAUTION

REST OF TODAY
North winds around 15 knots, diminishing to 5 to 10 knots early this afternoon, then becoming northeast late this afternoon. A moderate chop on the bay, diminishing to light chop this afternoon.

TONIGHT
East winds around 5 knots, becoming south in the late evening and overnight. Smooth on the bay.

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

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

TUESDAY
East winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers in the morning, then a chance of showers in the afternoon.

TUESDAY NIGHT
Southeast winds 10 to 15 knots, becoming around 10 knots early in the morning. A moderate chop on the bay, diminishing to light chop early in the morning. A chance of showers.

WEDNESDAY
Southeast winds 5 to 10 knots. Light chop on the bay. Showers likely with a slight chance of thunderstorms.

WEDNESDAY NIGHT
East winds 5 to 10 knots, becoming north after midnight. Light chop on the bay. A chance of showers, mainly in the evening.

THURSDAY
North winds around 10 knots, becoming northeast late in the afternoon. Light chop on the bay.

THURSDAY NIGHT
Northeast winds 5 to 10 knots, becoming southeast after midnight. Light chop on the bay, diminishing to smooth after midnight.

Winds and waves higher in and near thunderstorms.

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GMZ150-155-190315
Gulf waters from Port Mansfield to the Rio Grande out 20 nm
Gulf waters from Baffin Bay to Port Mansfield out 20 nm
852 AM CST Sun Jan 18 2026

SMALL CRAFT CAUTION

REST OF TODAY
North winds 15 to 20 knots, becoming northeast 5 to 10 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet this afternoon. Wave Detail: Northeast 7 feet at 8 seconds and north 2 feet at 5 seconds, becoming northeast 5 feet at 8 seconds and north 1 foot at 4 seconds.

TONIGHT
East winds around 5 knots, becoming southeast in the late evening and overnight. Seas 2 to 4 feet. Wave Detail: Northeast 4 feet at 7 seconds.

MONDAY
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at 6 seconds and southeast 2 feet at 3 seconds.

MONDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds.

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

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 6 seconds. A chance of showers.

WEDNESDAY
South winds around 10 knots. Seas 3 to 4 feet. A slight chance of thunderstorms. Showers likely.

WEDNESDAY NIGHT
Southeast winds around 10 knots, becoming northeast late in the evening, then becoming north after midnight. Seas 3 to 4 feet. A chance of showers.

THURSDAY
North winds 10 to 15 knots. Seas 3 to 5 feet. A slight chance of showers in the morning.

THURSDAY NIGHT
Northeast winds 5 to 10 knots, becoming southeast after midnight. Seas 3 to 4 feet.

Winds and seas higher in and near thunderstorms.

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GMZ170-175-190315
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
852 AM CST Sun Jan 18 2026

SMALL CRAFT CAUTION

REST OF TODAY
North winds 15 to 20 knots, diminishing to 5 to 10 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at 8 seconds and north 4 feet at 6 seconds.

TONIGHT
Northeast winds 5 to 10 knots, becoming southeast after midnight. Seas 2 to 4 feet. Wave Detail: Northeast 4 feet at 7 seconds.

MONDAY
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 6 seconds.

MONDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds.

TUESDAY
East winds 10 to 15 knots, increasing to 15 to 20 knots late in the afternoon. Seas 3 to 4 feet. Wave Detail: East 4 feet at 6 seconds. A chance of showers.

TUESDAY NIGHT
Southeast winds 15 to 20 knots, becoming around 15 knots early in the morning. Seas 4 to 5 feet. Wave Detail: East 5 feet at 6 seconds. A chance of showers.

WEDNESDAY
South winds 10 to 15 knots. Seas 4 to 5 feet. A slight chance of thunderstorms. Showers.

WEDNESDAY NIGHT
South winds around 10 knots, becoming west late in the evening, then becoming north after midnight. Seas 4 to 5 feet. Showers likely, mainly in the evening.

THURSDAY
North winds 10 to 15 knots, becoming northeast late in the afternoon. Seas 4 to 5 feet. A chance of showers, mainly in the morning.

THURSDAY NIGHT
East winds around 10 knots, becoming southeast after midnight. Seas 4 to 5 feet.

Winds and seas higher in and near thunderstorms.