280
FZUS54 KBRO 231743
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1243 PM CDT Sat Aug 23 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.

GMZ100-240615-
1243 PM CDT Sat Aug 23 2025

.SYNOPSIS...High pressure over the western Gulf will produce
generally light southerly to southeasterly winds and low seas
along the Lower Texas Coast through the forecast. Showers and
thunderstorms are expected for the next several days and could
result in locally elevated winds and seas.

$$

GMZ130-132-135-240615-
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-
1243 PM CDT Sat Aug 23 2025

.TONIGHT...East winds 5 to 10 knots, becoming southeast late this
evening, then becoming south around 5 knots after midnight,
becoming southwest early this morning. Light chop on the bay,
diminishing to smooth late this evening and overnight. A slight
chance of showers and thunderstorms this evening, then a chance
of showers and thunderstorms after midnight.
.SUNDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Smooth on the bay, increasing to light chop in the
afternoon. A chance of showers and thunderstorms.
.SUNDAY NIGHT...East winds 5 to 10 knots, becoming south early in
the morning. Light chop on the bay, diminishing to smooth in the
late evening and overnight. A chance of showers. A chance of
thunderstorms early in the evening, then a slight chance of
thunderstorms in the late evening and overnight.
.MONDAY...South winds around 5 knots, becoming southeast in the
afternoon. Light chop on the bay. Showers likely. A slight chance
of thunderstorms in the morning, then a chance of thunderstorms
in the afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
early in the morning. Light chop on the bay. A slight chance of
thunderstorms.
.TUESDAY...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots late in the afternoon. Light chop on the bay, increasing
to a moderate chop late in the afternoon. A chance of showers. A
slight chance of thunderstorms in the morning, then a chance of
thunderstorms in the afternoon.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on the
bay. A chance of showers and thunderstorms early in the evening.
A slight chance of showers after midnight.
.WEDNESDAY...Southeast winds 5 to 10 knots, becoming east late 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.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on
the bay. A chance of showers and thunderstorms early in the
evening.
.THURSDAY...Southeast winds 5 to 10 knots. Light chop on the bay.
A slight chance of showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
early in the morning. Light chop on the bay.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-240615-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1243 PM CDT Sat Aug 23 2025

.TONIGHT...East winds 5 to 10 knots, becoming southeast late this
evening, then becoming south around 5 knots after midnight,
becoming southwest early this morning. Seas 1 to 2 feet. Wave
Detail: East 1 foot at 3 seconds. A slight chance of
thunderstorms this evening. A chance of showers. A chance of
thunderstorms after midnight.
.SUNDAY...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 chance of showers and thunderstorms.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
2 seconds and southeast 1 foot at 5 seconds. A chance of showers
with a slight chance of thunderstorms in the evening, then
showers likely with a chance of thunderstorms after midnight.
.MONDAY...South winds around 5 knots, becoming southeast in the
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at
5 seconds. Showers likely with a slight chance of thunderstorms
in the morning, then a chance of showers and thunderstorms in the
afternoon.
.MONDAY NIGHT...Southeast winds around 10 knots, becoming south
early in the morning. Seas 2 to 3 feet. Wave Detail: Southeast
2 feet at 6 seconds. A chance of showers with a slight chance of
thunderstorms early in the evening, then a slight chance of
showers late in the evening. A chance of showers with a slight
chance of thunderstorms after midnight.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds. A slight chance of
thunderstorms. A chance of showers until late afternoon, then a
slight chance of showers late in the afternoon.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. 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.
.WEDNESDAY...Southeast winds 5 to 10 knots, becoming east late 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.
.WEDNESDAY NIGHT...Southeast winds around 10 knots, becoming 5 to
10 knots 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.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms until late afternoon.
.THURSDAY NIGHT...Southeast winds around 10 knots, becoming south
early in the morning. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-240615-
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-
1243 PM CDT Sat Aug 23 2025

.TONIGHT...Southeast winds around 5 knots, becoming south early
this morning. Seas 1 to 2 feet. Wave Detail: East 1 foot at
3 seconds. A chance of showers and thunderstorms early this
evening, then a slight chance of showers and thunderstorms late
this evening. A chance of showers and thunderstorms after
midnight.
.SUNDAY...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 chance of thunderstorms. Showers likely early in the
morning, then a chance of showers in the afternoon.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot
at 5 seconds. A chance of showers with a slight chance of
thunderstorms in the evening, then showers likely with a chance
of thunderstorms after midnight.
.MONDAY...South winds around 5 knots, becoming southeast in the
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at
5 seconds. A chance of thunderstorms. Showers likely until late
afternoon, then a chance of showers late in the afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
early in the morning. Seas 2 to 3 feet. Wave Detail: Southeast
2 feet at 6 seconds. A chance of showers with a slight chance of
thunderstorms early in the evening, then a slight chance of
showers late in the evening. A chance of showers with a slight
chance of thunderstorms after midnight.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A chance of showers and
thunderstorms until late afternoon, then a slight chance of
showers and thunderstorms late in the afternoon.
.TUESDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
4 feet. A slight chance of showers and thunderstorms early in the
evening. A chance of showers with a slight chance of
thunderstorms after midnight.
.WEDNESDAY...Southeast winds 5 to 10 knots, becoming east late in
the afternoon. Seas 2 to 4 feet. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...East winds around 10 knots, becoming southeast
early in the morning. Seas 2 to 4 feet. A chance of showers and
thunderstorms early in the evening. A slight chance of showers
and thunderstorms after midnight.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms until late afternoon.
.THURSDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. A slight chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$