857
FZUS54 KBRO 191844
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
144 PM CDT Sat Sep 19 2026

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-
144 PM CDT Sat Sep 19 2026

.SYNOPSIS...Favorable marine conditions are expected through the
next several days, with light to moderate winds and low to moderate
seas. Rain and thunderstorm chances increase next week which could
lead to locally adverse marine conditions.

$$

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-
144 PM CDT Sat Sep 19 2026

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

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-
144 PM CDT Sat Sep 19 2026

.TONIGHT...East winds 5 to 10 knots, becoming southeast after
midnight. Seas 3 to 4 feet. Wave Detail: East 3 feet at
7 seconds.
.SUNDAY...South winds around 5 knots, becoming north late in the
morning, then becoming northeast early in the afternoon, becoming
east late in the afternoon. Seas 2 to 3 feet. Wave Detail: East
3 feet at 6 seconds. A slight chance of showers and thunderstorms
until late afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots, becoming southeast
early in the morning. Seas 2 to 3 feet. Wave Detail: East 2 feet
at 6 seconds.
.MONDAY...Southeast winds around 5 knots, becoming east in the
afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
6 seconds. A slight chance of showers early in the morning, then
a slight chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 5 seconds.
.TUESDAY...East winds around 5 knots, becoming 5 to 10 knots in
the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet 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. 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...East winds 5 to 10 knots, increasing to 10 to
15 knots late in the afternoon. Seas 2 to 3 feet. A chance of
showers. A slight chance of thunderstorms until late afternoon,
then a chance of thunderstorms late in the afternoon.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of thunderstorms. A slight chance of showers in the
evening, then a chance of showers after midnight.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. A chance
of showers. A slight chance of thunderstorms in the morning, then
a chance of thunderstorms in the afternoon.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of thunderstorms early in the evening. A chance of
showers.

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-
144 PM CDT Sat Sep 19 2026

.TONIGHT...East winds around 10 knots, becoming southeast after
midnight. Seas 3 to 4 feet. Wave Detail: East 3 feet at
7 seconds. A slight chance of showers and thunderstorms early
this morning.
.SUNDAY...Southeast winds 5 to 10 knots, becoming east in the
afternoon. Seas 2 to 4 feet. Wave Detail: East 4 feet at
6 seconds. A slight chance of showers and thunderstorms.
.SUNDAY NIGHT...East winds around 10 knots, becoming southeast
early in the morning. Seas 2 to 3 feet. Wave Detail: East 2 feet
at 6 seconds.
.MONDAY...Southeast winds 5 to 10 knots, becoming east late in
the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
6 seconds. A slight chance of showers and thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots, becoming southeast
5 to 10 knots early in the morning. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 5 seconds. A slight chance of showers
early in the evening.
.TUESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
5 seconds. A chance of showers. A slight chance of thunderstorms
early in the morning, then a chance of thunderstorms in the
afternoon.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. A
chance of showers and thunderstorms early in the evening, then a
slight chance of showers and thunderstorms in the late evening
and overnight.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. A
chance of showers. A slight chance of thunderstorms in the
morning, then a chance of thunderstorms in the afternoon.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of showers. A chance of thunderstorms early in the
evening, then a slight chance of thunderstorms in the late
evening and overnight.
.THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. A slight
chance of thunderstorms in the morning. Showers likely. A chance
of thunderstorms in the afternoon.
.THURSDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet. A
chance of showers. A chance of thunderstorms early in the
evening, then a slight chance of thunderstorms in the late
evening and overnight.

Winds and seas higher in and near thunderstorms.

$$