069
FZUS54 KBRO 030617
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1217 AM CST Wed Dec 3 2025

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.

GMZ100-031930-
1217 AM CST Wed Dec 3 2025

.SYNOPSIS...Gentle southeasterly winds become moderate Wednesday
morning with slight seas. Favorable conditions continue through
Thursday morning. A cold front Thursday will bring adverse
conditions through Friday morning with moderate northerly winds
and moderate seas. Small Craft Exercise Caution headlines are
likely, and Small Craft Advisory conditions are possible Thursday
night. Conditions improve Friday into this weekend.

$$

GMZ130-132-135-031930-
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-
1217 AM CST Wed Dec 3 2025

.TODAY...Southeast winds 5 to 10 knots. Light chop on the bay. A
slight chance of showers and thunderstorms this afternoon.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south after
midnight. Light chop on the bay. A slight chance of showers. A
slight chance of thunderstorms early in the evening. A slight
chance of thunderstorms early in the morning.
.THURSDAY...West winds 5 to 10 knots, becoming northwest late in
the morning, then becoming north 10 to 15 knots in the afternoon.
A moderate chop on the bay. A chance of showers in the morning. A
slight chance of thunderstorms in the afternoon. Showers likely
in the afternoon.
.THURSDAY NIGHT...North winds 15 to 20 knots, diminishing to
10 to 15 knots early in the morning. Choppy on the bay,
diminishing to a moderate chop early in the morning. A slight
chance of thunderstorms early in the evening. Showers likely in
the evening, then a chance of showers after midnight.
.FRIDAY...North winds 10 to 15 knots. A moderate chop on the bay.
A chance of showers, mainly in the morning.
.FRIDAY NIGHT...North winds 5 to 10 knots. Light chop on the bay.
A chance of showers.
.SATURDAY...North winds 5 to 10 knots. Light chop on the bay. A
slight chance of showers in the morning.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots, becoming
northwest after midnight. Light chop on the bay, diminishing to
smooth in the late evening and overnight.
.SUNDAY...North winds around 5 knots, becoming 5 to 10 knots in
the afternoon. Light chop on the bay.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Light chop on the
bay.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-031930-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1217 AM CST Wed Dec 3 2025

.TODAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds. A chance of showers with a
slight chance of thunderstorms this afternoon.
.TONIGHT...Southeast winds around 10 knots, becoming south after
midnight. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at
5 seconds. A slight chance of thunderstorms. A chance of showers
early in the evening, then a slight chance of showers in the late
evening and overnight.
.THURSDAY...Southwest winds around 10 knots, becoming northwest
late in the morning, then becoming north early in the afternoon,
increasing to 15 to 20 knots late in the afternoon. Seas 3 to
4 feet, building to 4 to 6 feet, occasionally to 8 feet in the
afternoon. Wave Detail: Southeast 3 feet at 6 seconds, becoming
southeast 5 feet at 6 seconds. A chance of showers in the
morning. A slight chance of thunderstorms in the afternoon.
Showers in the afternoon.
.THURSDAY NIGHT...North winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: Northeast 6 feet at
6 seconds. Showers with a slight chance of thunderstorms until
early morning, then showers likely early in the morning.
.FRIDAY...North winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 5 feet at
6 seconds and north 1 foot at 3 seconds. A chance of showers.
.FRIDAY NIGHT...North winds around 10 knots. Seas 2 to 4 feet.
Wave Detail: Northeast 3 feet at 6 seconds. A chance of showers.
.SATURDAY...North winds 5 to 10 knots. Seas 2 to 3 feet. A chance
of showers, mainly in the morning.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots, becoming
northwest after midnight. Seas 2 to 3 feet.
.SUNDAY...North winds around 5 knots, becoming 5 to 10 knots in
the afternoon. Seas 1 to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots, increasing to
10 to 15 knots early in the morning. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-031930-
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-
1217 AM CST Wed Dec 3 2025

.TODAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 5 seconds. A slight chance of showers this
morning, then a chance of showers and thunderstorms this
afternoon.
.TONIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 5 seconds. A chance of showers. A
chance of thunderstorms early in the evening, then a slight
chance of thunderstorms in the late evening and overnight.
.THURSDAY...Southwest winds 10 to 15 knots, becoming northwest
early in the afternoon, then becoming north late in the
afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail:
Northwest 4 feet at 5 seconds and southeast 4 feet at 6 seconds.
Showers likely with a slight chance of thunderstorms in the
morning, then showers with a chance of thunderstorms in the
afternoon.
.THURSDAY NIGHT...North winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: East 5 feet at 6 seconds and
north 5 feet at 6 seconds. Showers. A chance of thunderstorms
early in the evening, then a slight chance of thunderstorms in
the late evening and overnight.
.FRIDAY...North winds 15 to 20 knots, diminishing to around
10 knots in the afternoon. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: North 5 feet at 6 seconds. Showers likely,
mainly in the morning.
.FRIDAY NIGHT...Northeast winds around 10 knots. Seas 3 to
4 feet. Wave Detail: North 3 feet at 6 seconds. A chance of
showers in the evening, then showers likely after midnight.
.SATURDAY...North winds around 10 knots. Seas 2 to 3 feet. A
chance of showers.
.SATURDAY NIGHT...North winds 5 to 10 knots, becoming northwest
after midnight. Seas 2 to 3 feet. A slight chance of showers in
the evening.
.SUNDAY...North winds 5 to 10 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$