521
FZUS54 KBRO 070604
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
104 AM CDT Tue Oct 7 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.

GMZ100-071830-
104 AM CDT Tue Oct 7 2025

.SYNOPSIS...Generally favorable marine conditions with light
onshore easterly flow continues into tonight. Weaker pressure
along the lower Texas coast arrives by Wednesday, with breezy
northeasterly winds through Friday. Long period swell is
expected to continue into next weekend. Expect an increasing
chance of showers and thunderstorms today into Thursday before
diminishing on Friday.

$$

GMZ130-132-135-071830-
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-
104 AM CDT Tue Oct 7 2025

.TODAY...Southeast winds 5 to 10 knots, becoming east this
afternoon. Light chop on the bay. A chance of showers. A slight
chance of thunderstorms early this morning, then a chance of
thunderstorms this afternoon.
.TONIGHT...East winds 5 to 10 knots. Light chop on the bay. A
slight chance of showers early in the evening. A slight chance of
showers and thunderstorms after midnight.
.WEDNESDAY...Northeast winds 10 to 15 knots. A moderate chop on
the bay. A chance of showers. A chance of thunderstorms, mainly
in the morning.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. A moderate
chop on the bay. A chance of showers early in the evening. A
slight chance of showers late in the evening, then a chance of
showers after midnight.
.THURSDAY...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. A moderate chop on the bay, increasing
to choppy in the afternoon. A chance of showers with a slight
chance of thunderstorms.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. A moderate chop
on the bay. A chance of showers, mainly in the evening.
.FRIDAY...Northeast winds 10 to 15 knots. A moderate chop on the
bay. A slight chance of showers and thunderstorms.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots, becoming east
5 to 10 knots after midnight. A moderate chop on the bay,
diminishing to light chop after midnight.
.SATURDAY...Northeast winds 5 to 10 knots. Light chop on the bay.
.SATURDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Light chop on the bay.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-071830-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
104 AM CDT Tue Oct 7 2025

.TODAY...Southeast winds 5 to 10 knots, becoming east this
afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
7 seconds and southeast 1 foot at 4 seconds. A chance of showers
and thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 4 seconds and east 2 feet at
7 seconds. A slight chance of showers. A slight chance of
thunderstorms after midnight.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
Wave Detail: East 3 feet at 6 seconds. A slight chance of
thunderstorms until late afternoon. A chance of showers.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to
4 feet. Wave Detail: East 3 feet at 5 seconds. A chance of
showers. A slight chance of thunderstorms after midnight.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 3 to 5 feet.
Wave Detail: East 4 feet at 6 seconds. A slight chance of
thunderstorms. Showers likely until late afternoon, then a chance
of showers late in the afternoon.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 4 to
5 feet. Wave Detail: East 4 feet at 6 seconds. A chance of
showers until early morning, then a slight chance of showers and
thunderstorms early in the morning.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 4 to 5 feet. A
slight chance of thunderstorms until late afternoon. A slight
chance of showers.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet.
A slight chance of showers.
.SATURDAY...Northeast winds around 10 knots. Seas 3 to 4 feet. A
slight chance of showers early in the morning.
.SATURDAY NIGHT...East winds around 10 knots, becoming southeast
after midnight. Seas 3 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-071830-
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-
104 AM CDT Tue Oct 7 2025

.TODAY...Southeast winds 5 to 10 knots, becoming east this
afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
4 seconds and east 2 feet at 7 seconds. A chance of showers. A
slight chance of thunderstorms this morning, then a chance of
thunderstorms this afternoon.
.TONIGHT...East winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 4 seconds and east 2 feet at 7 seconds. A
slight chance of showers. A slight chance of thunderstorms early
in the evening. A slight chance of thunderstorms after midnight.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
Wave Detail: East 3 feet at 6 seconds. A slight chance of
thunderstorms until late afternoon. A chance of showers.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to
4 feet. Wave Detail: East 4 feet at 5 seconds. A chance of
showers.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 4 to 5 feet.
Wave Detail: East 4 feet at 6 seconds. Showers likely with a
slight chance of thunderstorms.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to
5 feet. Wave Detail: East 4 feet at 6 seconds. Showers likely
early in the evening, then a chance of showers in the late
evening and early morning. A slight chance of showers early in
the morning.
.FRIDAY...Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 4 to 5 feet. A chance of showers
with a slight chance of thunderstorms in the morning, then a
slight chance of showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet.
A slight chance of showers.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. A
slight chance of showers.
.SATURDAY NIGHT...East winds around 10 knots. Seas 3 to 4 feet. A
slight chance of showers in the evening.

Winds and seas higher in and near thunderstorms.

$$