479
FZUS54 KBRO 310551
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1251 AM CDT Sun Aug 31 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.

GMZ100-311815-
1251 AM CDT Sun Aug 31 2025

.SYNOPSIS...Light to moderate southerly to southeasterly winds
and low to moderate seas are forecast along the Lower Texas Coast
through the much of the period. The passage of a weak cold front
early in the week will briefly shift winds more easterly to
northerly Monday and Tuesday, with southeasterly flow returning
through the remainder of the week. The front is not expected to
bring a significant increase in wind speeds, and Small Craft
Should Exercise Caution headlines or Small Craft Advisories are
not likely to be needed.

$$

GMZ130-132-135-311815-
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-
1251 AM CDT Sun Aug 31 2025

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

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-311815-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1251 AM CDT Sun Aug 31 2025

.TODAY...South winds 5 to 10 knots, becoming southeast this
afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 1 foot at
4 seconds and east 1 foot at 8 seconds.
.TONIGHT...Southeast winds 5 to 10 knots, becoming south early in
the morning. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
4 seconds and east 1 foot at 8 seconds. A slight chance of
showers and thunderstorms early in the morning.
.MONDAY...South winds around 5 knots, becoming northeast in the
afternoon, then becoming 5 to 10 knots late in the afternoon.
Seas 1 to 2 feet. Wave Detail: East 1 foot at 3 seconds and east
1 foot at 8 seconds. A chance of thunderstorms in the morning. A
chance of showers. A slight chance of thunderstorms in the
afternoon.
.MONDAY 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 and east 1 foot at 8 seconds. A slight chance of
showers and thunderstorms in the evening, then showers likely
with a chance of thunderstorms after midnight.
.TUESDAY...Northwest winds 5 to 10 knots, becoming northeast in
the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at
4 seconds and southeast 1 foot at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots, becoming south early
in the morning. Seas 2 to 3 feet. Wave Detail: East 2 feet at
5 seconds and east 1 foot at 8 seconds. A chance of showers with
a slight chance of thunderstorms early in the evening. A slight
chance of showers in the late evening and overnight. A slight
chance of thunderstorms after midnight.
.WEDNESDAY...Northwest winds 5 to 10 knots, becoming northeast
late in the afternoon. Seas 2 to 3 feet. A slight chance of
showers and thunderstorms early in the morning.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming south early
in the morning. Seas 2 to 3 feet.
.THURSDAY...Southwest winds around 5 knots, becoming east in the
afternoon. Seas 1 to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 to
2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-311815-
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-
1251 AM CDT Sun Aug 31 2025

.TODAY...South winds 5 to 10 knots, becoming east late this
afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at
4 seconds and east 1 foot at 8 seconds. A slight chance of
showers and thunderstorms this morning.
.TONIGHT...Southeast winds 5 to 10 knots, becoming around 5 knots
early in the morning. Seas 1 to 2 feet. Wave Detail: Southeast
2 feet at 4 seconds and east 1 foot at 8 seconds. A slight chance
of showers and thunderstorms early in the morning.
.MONDAY...South winds around 5 knots, becoming north in the
afternoon, then becoming northeast late in the afternoon. Seas
1 to 2 feet. Wave Detail: Northeast 1 foot at 3 seconds and
southeast 1 foot at 4 seconds. A chance of showers and
thunderstorms.
.MONDAY NIGHT...Northeast winds 5 to 10 knots, becoming southeast
early in the morning. Seas 1 to 2 feet. Wave Detail: East 1 foot
at 4 seconds and east 1 foot at 8 seconds. A chance of showers
with a slight chance of thunderstorms in the evening, then
showers likely with a chance of thunderstorms after midnight.
.TUESDAY...Northwest winds 5 to 10 knots, becoming north in the
afternoon. Seas 2 to 3 feet. Wave Detail: North 2 feet at
4 seconds and southeast 1 foot at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 2 feet at 4 seconds and southeast 1 foot
at 5 seconds. A chance of showers with a slight chance of
thunderstorms early in the evening. A slight chance of showers in
the late evening and overnight. A slight chance of thunderstorms
after midnight.
.WEDNESDAY...North winds 5 to 10 knots, becoming northeast late
in the afternoon. Seas 2 to 3 feet. 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 2 to 3 feet.
.THURSDAY...West winds around 5 knots, becoming northeast late in
the afternoon. Seas 1 to 2 feet.
.THURSDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 1 to 2 feet.

Winds and seas higher in and near thunderstorms.

$$