518
FZUS54 KBRO 200544
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1244 AM CDT Wed Aug 20 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.

GMZ100-201830-
1244 AM CDT Wed Aug 20 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.

$$

GMZ130-132-135-201830-
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 CDT Wed Aug 20 2025

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

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-201830-
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 CDT Wed Aug 20 2025

.TODAY...Northwest winds around 5 knots, becoming northeast
around 5 knots late this afternoon. Seas 1 to 2 feet. Wave
Detail: East 1 foot at 4 seconds. A chance of showers and
thunderstorms early this morning, then a slight chance of showers
and thunderstorms late this morning.
.TONIGHT...East winds 5 to 10 knots, becoming south after
midnight, then becoming southwest early in the morning. Seas 1 to
2 feet. Wave Detail: East 1 foot at 4 seconds.
.THURSDAY...West winds around 5 knots, becoming east around
5 knots late in the afternoon. Seas 1 to 2 feet. Wave Detail:
East 1 foot at 4 seconds. A slight chance of showers. A slight
chance of thunderstorms in the afternoon.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
3 seconds. A slight chance of showers and thunderstorms after
midnight.
.FRIDAY...Southwest winds around 5 knots, becoming east early in
the afternoon, then increasing to 5 to 10 knots late in the
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at
3 seconds. A chance of thunderstorms in the morning. A chance of
showers. A slight chance of thunderstorms in the afternoon.
.FRIDAY NIGHT...Southeast winds 5 to 10 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. A chance of showers
with a slight chance of thunderstorms after midnight.
.SATURDAY...Southwest winds around 5 knots, becoming northwest
late in the morning, then becoming northeast in the afternoon.
Seas 0 to 1 foot. 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 5 to 10 knots, becoming south after
midnight. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms early in the evening. A slight chance of showers
and thunderstorms after midnight.
.SUNDAY...Southwest winds around 5 knots, becoming east in the
afternoon. Seas 1 to 2 feet. A chance of showers and
thunderstorms until late afternoon, then a slight chance of
showers and thunderstorms late in the afternoon.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 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.

$$

GMZ170-175-201830-
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 CDT Wed Aug 20 2025

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

Winds and seas higher in and near thunderstorms.

$$