273
FZUS54 KBRO 210550
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1250 AM CDT Thu Aug 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.

GMZ100-211830-
1250 AM CDT Thu Aug 21 2025

.SYNOPSIS...High pressure over the western Gulf of America will
produce generally light winds and low seas along the Lower Texas
Coast through the forecast.

$$

GMZ130-132-135-211830-
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-
1250 AM CDT Thu Aug 21 2025

.TODAY...Southwest winds around 5 knots, becoming north late this
morning, then becoming east this afternoon. A light chop on the
bay.
.TONIGHT...Southeast winds 5 to 10 knots, becoming southwest
early in the morning. A light chop on the bay. A slight chance of
showers and thunderstorms early in the morning.
.FRIDAY...Southwest winds around 5 knots, becoming east in the
afternoon. A light chop on the bay. A slight chance of
thunderstorms in the morning. A chance of showers. A chance of
thunderstorms in the afternoon.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. A light chop on the bay. A chance of showers with
a slight chance of thunderstorms.
.SATURDAY...Southwest winds around 5 knots, becoming east in the
afternoon. A light chop on the bay. A chance of showers. A slight
chance of thunderstorms in the morning, then a chance of
thunderstorms in the afternoon.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
early in the morning. A light chop on the bay. A chance of
showers and thunderstorms early in the evening, then a slight
chance of showers late in the evening. A chance of showers and
thunderstorms after midnight.
.SUNDAY...Southwest winds around 5 knots, becoming northeast late
in the morning, then becoming east in the afternoon. A light chop
on the bay. A chance of showers and thunderstorms.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. A light chop on the bay. A chance of showers and
thunderstorms early in the evening. A slight chance of showers and
thunderstorms after midnight.
.MONDAY...South winds around 5 knots, becoming southeast in the
afternoon. A light chop on the bay. A slight chance of showers
and thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
early in the morning. A light chop on the bay. A chance of
showers and thunderstorms early in the evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-211830-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1250 AM CDT Thu Aug 21 2025

.TODAY...Southwest winds around 5 knots, becoming east around
5 knots late this afternoon. Seas 1 to 2 feet. Wave Detail: East
1 foot at 4 seconds.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south early in
the morning. Seas 1 to 2 feet. Wave Detail: East 1 foot at
3 seconds. A slight chance of showers and thunderstorms early in
the morning.
.FRIDAY...Southwest winds around 5 knots, becoming east in the
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at
3 seconds. A slight chance of showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot
at 3 seconds. A slight chance of thunderstorms early in the
evening. A slight chance of showers in the evening. A chance of
showers with a slight chance of thunderstorms after midnight.
.SATURDAY...Southwest winds around 5 knots, becoming east around
5 knots in the afternoon. Seas 1 to 2 feet. Wave Detail:
Southeast 1 foot at 3 seconds. A chance of showers. A slight
chance of thunderstorms in the morning, then a chance of
thunderstorms in the afternoon.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
early in the morning. Seas 1 to 2 feet. Wave Detail: East 1 foot
at 3 seconds. A chance of showers and thunderstorms early in the
evening, then a slight chance of showers late in the evening. A
chance of showers and thunderstorms after midnight.
.SUNDAY...Southwest winds around 5 knots, becoming north around
5 knots late in the morning, then becoming east in the afternoon.
Seas 1 to 2 feet. A chance of showers and thunderstorms.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. A chance of showers and
thunderstorms early in the evening. A chance of showers with a
slight chance of thunderstorms after midnight.
.MONDAY...South winds around 5 knots, becoming southeast in the
afternoon. Seas 1 to 2 feet. A slight chance of thunderstorms. A
chance of showers, mainly in the morning.
.MONDAY NIGHT...Southeast winds around 10 knots, becoming south
early in the morning. Seas 2 to 3 feet. A slight chance of
showers and thunderstorms early in the evening. A slight chance
of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-211830-
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-
1250 AM CDT Thu Aug 21 2025

.TODAY...Southwest winds around 5 knots, becoming northeast late
this afternoon. Seas 1 to 2 feet. Wave Detail: East 1 foot at
4 seconds.
.TONIGHT...Southeast winds around 5 knots, becoming south early
in the morning. Seas 1 to 2 feet. Wave Detail: East 1 foot at
3 seconds. A chance of showers with a slight chance of
thunderstorms early in the morning.
.FRIDAY...Southwest winds around 5 knots, becoming northwest
around 5 knots early in the afternoon, then becoming east late in
the afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at
3 seconds. A chance of showers and thunderstorms until late
afternoon.
.FRIDAY NIGHT...Southeast winds around 5 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
2 seconds. A chance of showers with a slight chance of
thunderstorms after midnight. A chance of showers and
thunderstorms early in the morning.
.SATURDAY...Southwest winds around 5 knots, becoming northeast
early in the afternoon, then becoming east late in the afternoon.
Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at 3 seconds. A
chance of showers and thunderstorms until late afternoon, then a
slight chance of showers and thunderstorms late in the afternoon.
.SATURDAY NIGHT...East winds around 5 knots, becoming south after
midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
3 seconds. A slight chance of thunderstorms early in the evening.
A slight chance of showers in the evening, then a chance of
showers and thunderstorms after midnight.
.SUNDAY...Southwest winds around 5 knots, becoming northwest late
in the morning, then becoming east in the afternoon. Seas 1 to
2 feet. A chance of showers and thunderstorms.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 2 to 3 feet. A chance of showers and
thunderstorms early in the evening. A chance of showers and
thunderstorms after midnight.
.MONDAY...South winds around 5 knots, becoming southeast in the
afternoon. Seas 2 to 3 feet. A chance of thunderstorms in the
morning. A chance of showers. A slight chance of thunderstorms in
the afternoon.
.MONDAY NIGHT...Southeast winds around 10 knots, becoming south
early in the morning. Seas 2 to 3 feet. A slight chance of
showers and thunderstorms early in the evening. A slight chance
of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$