838
FZUS54 KBRO 220547
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1147 PM CST Fri Nov 21 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.

GMZ100-221830-
1147 PM CST Fri Nov 21 2025

.SYNOPSIS...Generally favorable marine conditions are expected to
continue into Sunday. 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.

$$

GMZ130-132-135-221830-
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-
1147 PM CST Fri Nov 21 2025

...SMALL CRAFT EXERCISE CAUTION...

.TODAY...South winds 10 to 15 knots. A moderate chop on the bay.
.TONIGHT...Southeast winds 10 to 15 knots, becoming south 5 to
10 knots after midnight. Light chop on the bay. A slight chance
of showers and thunderstorms early in the morning.
.SATURDAY...Southeast winds 5 to 10 knots, becoming east in the
afternoon. Light chop on the bay. A slight chance of
thunderstorms in the morning. A chance of showers. A chance of
thunderstorms in the afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Light chop on the
bay. A chance of showers with a slight chance of thunderstorms.
.SUNDAY...Southeast winds 10 to 15 knots. A moderate chop on the
bay. A slight chance of thunderstorms early in the morning. A
chance of showers in the morning, then a slight chance of showers
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. A moderate chop on
the bay.
.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.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-221830-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1147 PM CST Fri Nov 21 2025

.TODAY...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 6 seconds.
.TONIGHT...Southeast winds 10 to 15 knots, becoming south 5 to
10 knots early in the morning. Seas 2 to 4 feet. Wave Detail:
Southeast 3 feet at 6 seconds. A slight chance of showers and
thunderstorms early in the morning.
.SATURDAY...Southeast winds 5 to 10 knots, becoming east in the
afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
6 seconds. A chance of showers in the morning. A chance of
thunderstorms. Showers likely in the afternoon.
.SATURDAY NIGHT...East winds around 10 knots. Seas 2 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers
with a slight chance of thunderstorms.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A chance of showers,
mainly in the morning.
.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 4 to 6 feet,
occasionally to 8 feet.
.MONDAY NIGHT...South winds 15 to 20 knots, diminishing to 10 to
15 knots early in the morning. Seas 3 to 4 feet. A slight chance
of showers and thunderstorms after midnight.
.TUESDAY...South winds 5 to 10 knots, becoming southeast late in
the afternoon. Seas 2 to 3 feet. A slight chance of showers. A
slight chance of thunderstorms in the afternoon.
.TUESDAY NIGHT...East winds around 10 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.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-221830-
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-
1147 PM CST Fri Nov 21 2025

.TODAY...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 6 seconds.
.TONIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A slight chance of showers
and thunderstorms early in the morning.
.SATURDAY...Southeast winds 5 to 10 knots, becoming east late in
the afternoon. Seas 2 to 4 feet. Wave Detail: Southeast 2 feet at
6 seconds. A chance of showers with a slight chance of
thunderstorms.
.SATURDAY NIGHT...East winds around 10 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A chance of showers,
mainly in the morning.
.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.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 5 feet. A
slight chance of showers. A slight chance of thunderstorms early
in the evening. A slight chance of thunderstorms early in the
morning.
.TUESDAY...South winds 5 to 10 knots, becoming southeast late in
the afternoon. Seas 3 to 4 feet. A chance of showers. A slight
chance of thunderstorms in the afternoon.
.TUESDAY NIGHT...East winds around 10 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.

Winds and seas higher in and near thunderstorms.

$$