934
FZUS54 KBRO 040644
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1244 AM CST Thu Dec 4 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.

GMZ100-041930-
1244 AM CST Thu Dec 4 2025

.SYNOPSIS...The passage of a cold front through the Lower Texas
Coast on Thursday will produce adverse marine conditions at that
time and through the end of the week. Improved winds and seas are
anticipated during the weekend and early in the new work week.

$$

GMZ130-132-135-041930-
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-
1244 AM CST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
FRIDAY MORNING...

.TODAY...Southwest winds 5 to 10 knots, becoming west late this
morning, then becoming north 10 to 15 knots early this afternoon,
increasing to 15 to 20 knots late this afternoon. A light chop on
the bay, increasing to a moderate chop on the bay early this
afternoon, then increasing to choppy bay waters late this
afternoon. A slight chance of showers and thunderstorms this
morning. A chance of showers and thunderstorms this afternoon.
.TONIGHT...North winds 15 to 20 knots. Choppy bay waters. A
slight chance of thunderstorms early in the evening. A chance of
showers.
.FRIDAY...North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Choppy bay waters, diminishing to a
moderate chop on the bay in the afternoon. A chance of showers,
mainly in the morning.
.FRIDAY NIGHT...North winds 5 to 10 knots. A light chop on the
bay. A chance of showers.
.SATURDAY...North winds 5 to 10 knots, becoming northeast late in
the afternoon. A light chop on the bay.
.SATURDAY NIGHT...East winds around 5 knots, becoming west early
in the morning. A light chop on the bay.
.SUNDAY...West winds around 5 knots, becoming north in the
afternoon, then becoming around 10 knots late in the afternoon.
A light chop on the bay.
.SUNDAY NIGHT...North winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Choppy bay waters.
.MONDAY...North winds 10 to 15 knots. A moderate chop on the bay.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. A light chop on
the bay.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-041930-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1244 AM CST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
FRIDAY MORNING...

.TODAY...South winds around 10 knots, becoming west late this
morning, then becoming northwest early this afternoon, becoming
north 15 to 20 knots late this afternoon. Seas 3 to 5 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A chance of showers with a
slight chance of thunderstorms this morning, then showers likely
with a chance of thunderstorms this afternoon.
.TONIGHT...North winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet, building to 6 to 8 feet, occasionally to
10 feet after midnight. Wave Detail: North 6 feet at 5 seconds,
becoming northeast 7 feet at 7 seconds and north 4 feet at
4 seconds. A slight chance of thunderstorms early in the evening.
A chance of showers.
.FRIDAY...North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 5 to 7 feet, occasionally to
9 feet, subsiding to 3 to 5 feet in the afternoon. Wave Detail:
Northeast 6 feet at 7 seconds and north 4 feet at 4 seconds,
becoming northeast 4 feet at 6 seconds. A chance of showers.
.FRIDAY NIGHT...North winds 5 to 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, becoming northeast late in
the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at
6 seconds. A slight chance of showers in the morning.
.SATURDAY NIGHT...East winds around 5 knots, becoming southwest
early in the morning. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 5 seconds and west 1 foot at 2 seconds.
.SUNDAY...West winds 5 to 10 knots, becoming north late in the
afternoon. Seas 2 to 3 feet.
.SUNDAY NIGHT...North winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas 3 to 5 feet.
.MONDAY...North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 3 to 5 feet.
.MONDAY NIGHT...Northeast winds 5 to 10 knots, becoming east
after midnight. Seas 2 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-041930-
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-
1244 AM CST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
FRIDAY MORNING...

.TODAY...Southwest winds 10 to 15 knots, becoming west early this
afternoon, then becoming north 15 to 20 knots late this
afternoon. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at
6 seconds. A chance of showers with a slight chance of
thunderstorms this morning, then showers with a chance of
thunderstorms this afternoon.
.TONIGHT...North winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet, building to 6 to 8 feet, occasionally to
10 feet after midnight. Wave Detail: North 5 feet at 6 seconds
and southeast 4 feet at 6 seconds, becoming northeast 6 feet at
6 seconds. Showers likely with a slight chance of thunderstorms
early in the evening, then a chance of showers in the late
evening and overnight.
.FRIDAY...North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 5 to 7 feet, occasionally to
9 feet, subsiding to 3 to 5 feet in the afternoon. Wave Detail:
North 6 feet at 6 seconds, becoming north 4 feet at 6 seconds.
Showers likely.
.FRIDAY NIGHT...Northeast winds around 10 knots. Seas 3 to
4 feet. Wave Detail: North 3 feet at 6 seconds. Showers likely.
.SATURDAY...North winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 5 seconds. A chance of showers,
mainly in the morning.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots, becoming west
early in the morning. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 4 seconds.
.SUNDAY...West winds 5 to 10 knots, becoming north late in the
afternoon. Seas 2 to 3 feet.
.SUNDAY NIGHT...North winds 10 to 15 knots, increasing to 15 to
20 knots in the late evening and overnight. Seas 3 to 5 feet.
.MONDAY...North winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 4 to 5 feet.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$