964
FZUS54 KBRO 181754
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1254 PM CDT Mon Aug 18 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.

GMZ100-190615-
1254 PM CDT Mon Aug 18 2025

.SYNOPSIS...A meek pressure gradient will allow for slight seas and gentle
winds out of the south-southeast, becoming moderate in the
afternoons and evenings with land-sea breeze. Conditions become
less favorable as the week progresses, with mid-level disturbances
allowing for a chance of showers and thunderstorms every day
from Tuesday onward. The greatest chance of showers or
thunderstorms is Wednesday, at 30 to 40 percent. Conditions will
be degraded in any storms over the waters with gusty winds,
lightning, and heavy rainfall.

$$

GMZ130-132-135-190615-
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-
1254 PM CDT Mon Aug 18 2025

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

$$

GMZ150-155-190615-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1254 PM CDT Mon Aug 18 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 2 feet at 5 seconds.
.TUESDAY...Southwest winds around 5 knots, becoming north late in
the morning, then becoming northeast in the afternoon. Seas 1 to
2 feet. Wave Detail: East 1 foot at 5 seconds. A slight chance of
showers and thunderstorms early in the afternoon.
.TUESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight, then becoming south early in the morning. Seas
1 to 2 feet. Wave Detail: East 1 foot at 5 seconds. A chance of
showers and thunderstorms after midnight.
.WEDNESDAY...West 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 thunderstorms in the
morning. A chance of showers. A slight chance of thunderstorms in
the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight, then becoming south around 5 knots 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: East 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. 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. A slight chance of showers and
thunderstorms.
.FRIDAY 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.
.SATURDAY...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.
.SATURDAY 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 chance of showers with a
slight chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-190615-
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-
1254 PM CDT Mon Aug 18 2025

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

Winds and seas higher in and near thunderstorms.

$$