557
FZUS54 KBRO 091825
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
125 PM CDT Sat Aug 9 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.

GMZ100-100730-
125 PM CDT Sat Aug 9 2025

.SYNOPSIS...Mostly favorable marine conditions prevail into the
upcoming week as high pressure over the Gulf continues to result
in gentle to moderate southeasterly to southerly winds and slight
to moderate seas. There is a daily low to moderate (20-30%)
chance of showers and thunderstorms through Tuesday with limited
chances by Wednesday and onward for mainly the offshore (20-60 nm)
Gulf waters.

$$

GMZ130-132-135-100730-
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-
125 PM CDT Sat Aug 9 2025

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

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-100730-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
125 PM CDT Sat Aug 9 2025

.TONIGHT...Southeast winds around 10 knots, becoming south after
midnight. Seas 2 to 3 feet. Wave Detail: Southeast 1 foot at
5 seconds.
.SUNDAY...South winds around 5 knots, becoming east in the
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at
4 seconds.
.SUNDAY NIGHT...Southeast winds around 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: East 2 feet at
4 seconds.
.MONDAY...South winds 5 to 10 knots, becoming southeast in the
afternoon. Seas 1 to 2 feet. Wave Detail: East 1 foot at
5 seconds. A slight chance of showers and thunderstorms until
late afternoon.
.MONDAY NIGHT...Southeast winds around 10 knots, becoming south
after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at
5 seconds.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds. A slight chance of showers
and thunderstorms.
.TUESDAY NIGHT...Southeast winds around 10 knots, becoming south
after midnight. Seas 2 to 3 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots, becoming around
10 knots late in the afternoon. Seas 2 to 3 feet. A slight chance
of showers and thunderstorms in the morning.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
early in the morning. Seas 2 to 3 feet.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-100730-
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-
125 PM CDT Sat Aug 9 2025

.TONIGHT...Southeast winds 5 to 10 knots, becoming south after
midnight. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at
4 seconds and east 1 foot at 7 seconds.
.SUNDAY...South winds around 5 knots, becoming southeast in the
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot at
4 seconds. A slight chance of showers and thunderstorms in the
morning.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: Southeast 1 foot
at 4 seconds. A slight chance of showers after midnight. A slight
chance of showers and thunderstorms early in the morning.
.MONDAY...South winds 5 to 10 knots, becoming southeast in the
afternoon. Seas 1 to 2 feet. Wave Detail: South 1 foot at
4 seconds and east 1 foot at 5 seconds. A slight chance of
showers and thunderstorms until late afternoon.
.MONDAY NIGHT...Southeast winds around 10 knots, becoming south
after midnight. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet
at 5 seconds.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds. A slight chance of showers
and thunderstorms until late afternoon.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 2 to 3 feet. A slight chance of showers and
thunderstorms after midnight.
.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
4 feet.
.THURSDAY...South winds around 10 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms until late afternoon.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet.

Winds and seas higher in and near thunderstorms.

$$