784
FZUS54 KBRO 171750
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1250 PM CDT Sun Aug 17 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.

GMZ100-180615-
1250 PM CDT Sun Aug 17 2025

.SYNOPSIS...Generally favorable marine conditions are expected to
persist through the forecast. Light to moderate southeasterly
winds and slight seas are expected to continue through the week.
Daily low chances for showers and thunderstorms are expected to
return Tuesday and continue through the remainder of the forecast.

$$

GMZ130-132-135-180615-
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 PM CDT Sun Aug 17 2025

.TONIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Light chop on the bay.
.MONDAY...South winds around 5 knots, becoming southeast late in
the morning, then becoming east in the afternoon. Smooth on the
bay, increasing to light chop in the afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots, becoming around
5 knots after midnight, then becoming south around 5 knots early
in the morning. Light chop on the bay, diminishing to smooth
after midnight.
.TUESDAY...Light and variable winds, becoming northeast 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.
.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 early in the evening.
.WEDNESDAY...West winds around 5 knots, becoming north 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.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming south early
in the morning. Light chop on the bay, diminishing to smooth
after midnight.
.THURSDAY...West winds around 5 knots, becoming north 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 and 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 after midnight.
.FRIDAY...Southwest winds around 5 knots, becoming east in the
afternoon. Smooth on the bay, increasing to light chop in the
afternoon. A slight chance of showers and thunderstorms.
.FRIDAY 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.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-180615-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1250 PM CDT Sun Aug 17 2025

.TONIGHT...Southeast winds around 10 knots, becoming 5 to
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast
2 feet at 5 seconds.
.MONDAY...South winds around 5 knots, becoming southeast late in
the morning, then becoming east in the afternoon. Seas 1 to
2 feet. Wave Detail: Southeast 2 feet at 5 seconds.
.MONDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 1 to 2 feet. Wave Detail: East 2 feet at
5 seconds.
.TUESDAY...Light and variable winds, becoming northeast around
5 knots late in the morning, then increasing to 5 to 10 knots in
the afternoon. Seas 1 to 2 feet. Wave Detail: East 1 foot at
5 seconds. A slight chance of showers and thunderstorms.
.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.
.WEDNESDAY...West winds around 5 knots, becoming east around
5 knots late in the afternoon. Seas 1 to 2 feet. Wave Detail:
Northeast 1 foot at 2 seconds and east 1 foot at 5 seconds. A
slight chance of showers and thunderstorms until late afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming south early
in the morning. Seas 1 to 2 feet.
.THURSDAY...Southwest winds around 5 knots, becoming northwest
around 5 knots late in the morning, then becoming northeast early
in the afternoon, becoming east around 5 knots late in the
afternoon. Seas 1 to 2 feet. A slight chance of showers.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. A slight chance of showers
after midnight.
.FRIDAY...South 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 after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-180615-
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 PM CDT Sun Aug 17 2025

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

Winds and seas higher in and near thunderstorms.

$$