721
FZUS54 KBRO 191841
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
141 PM CDT Tue Aug 19 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.

GMZ100-200715-
141 PM CDT Tue Aug 19 2025

.SYNOPSIS...Day-to-day or near day-to-day chances for showers and
thunderstorms persist through next weekend. Otherwise, favorable
marine conditions are expected along the Lower Texas Coast through
the forecast period, with gentle to moderate winds and slight
seas. Expect degraded conditions with elevated seas, gusty winds,
and lightning possible in any thunderstorm.

$$

GMZ130-132-135-200715-
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-
141 PM CDT Tue Aug 19 2025

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

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-200715-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
141 PM CDT Tue Aug 19 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-200715-
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-
141 PM CDT Tue Aug 19 2025

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

Winds and seas higher in and near thunderstorms.

$$