509
FZUS54 KBRO 221804
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1204 PM CST Sat Nov 22 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.

GMZ100-230715-
1204 PM CST Sat Nov 22 2025

.SYNOPSIS...Generally favorable marine conditions are expected to
continue into today. Adverse conditions will likely develop
Sunday evening into Monday as the pressure gradient strengthens
along the lower Texas coast. Generally favorable conditions are
briefly forecast to return Tuesday before the next frontal
passage. The chance of showers and thunderstorms continues into
next week.

$$

GMZ130-132-135-230715-
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-
1204 PM CST Sat Nov 22 2025

.TONIGHT...Southeast winds 5 to 10 knots. Light chop on the bay.
A slight chance of thunderstorms. A slight chance of showers
early this evening, then a chance of showers late this evening
and overnight.
.SUNDAY...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. A moderate chop on the bay. A chance
of showers with a slight chance of thunderstorms in the morning,
then a slight chance of showers early in the afternoon.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Choppy on the
bay.
.MONDAY...South winds 15 to 20 knots. Choppy on the bay.
.MONDAY NIGHT...South winds 10 to 15 knots, diminishing to 5 to
10 knots early in the morning. A moderate chop on the bay,
diminishing to light chop early in the morning.
.TUESDAY...South winds 5 to 10 knots, becoming southeast in the
afternoon. Light chop on the bay, diminishing to smooth late in
the morning, then increasing to light chop in the afternoon. A
slight chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...East winds 5 to 10 knots, becoming northeast
10 to 15 knots early in the morning. Light chop on the bay,
increasing to a moderate chop early in the morning. A chance of
thunderstorms. A chance of showers in the evening, then showers
likely after midnight.
.WEDNESDAY...North winds 10 to 15 knots, becoming northeast 15 to
20 knots in the afternoon. A moderate chop on the bay, increasing
to choppy in the afternoon. A chance of showers. A chance of
thunderstorms, mainly in the morning.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. A moderate chop on
the bay. A slight chance of showers.
.THURSDAY...Northeast winds 10 to 15 knots. A moderate chop on
the bay. A slight chance of showers.
.THURSDAY NIGHT...East winds around 10 knots. Light chop on the
bay. A slight chance of showers.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-230715-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1204 PM CST Sat Nov 22 2025

.TONIGHT...Southeast winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: Southeast 2 feet at 6 seconds. A slight chance of
thunderstorms. A slight chance of showers early this evening,
then a chance of showers late this evening and overnight.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Wave
Detail: East 2 feet at 6 seconds. A chance of showers with a
slight chance of thunderstorms in the morning, then a slight
chance of showers early in the afternoon.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to 5 feet.
Wave Detail: Southeast 5 feet at 6 seconds.
.MONDAY...South winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: Southeast 6 feet at
6 seconds.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 5 feet.
Wave Detail: Southeast 4 feet at 6 seconds. A slight chance of
showers after midnight.
.TUESDAY...South winds 5 to 10 knots, becoming southeast late in
the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
6 seconds. A slight chance of showers. A slight chance of
thunderstorms in the afternoon.
.TUESDAY NIGHT...East winds 10 to 15 knots, becoming northeast
early in the morning. Seas 3 to 4 feet. A chance of
thunderstorms. A chance of showers in the evening, then showers
likely after midnight.
.WEDNESDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet. A
chance of showers. A chance of thunderstorms, mainly in the
morning.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to
5 feet. A chance of showers, mainly in the evening.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 4 to 5 feet. A
slight chance of showers.
.THURSDAY NIGHT...East winds around 10 knots. Seas 4 to 5 feet. A
slight chance of showers.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-230715-
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-
1204 PM CST Sat Nov 22 2025

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

Winds and seas higher in and near thunderstorms.

$$