401
FZUS54 KBRO 090346
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1046 PM CDT Thu Oct 8 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.

GMZ100-091630-
1046 PM CDT Thu Oct 8 2026

.SYNOPSIS...Marine conditions are expected to deteriorate across
Gulf waters as Hurricane Isaias continues northward into the
northern Gulf Coast by late Friday. Southeasterly winds return
late this weekend with improving marine conditions into next week.

$$

GMZ130-132-135-091630-
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-
1046 PM CDT Thu Oct 8 2026

.REST OF TONIGHT...Northeast winds 10 to 15 knots, diminishing to
5 to 10 knots. A moderate chop on the bay, diminishing to light
chop.
.FRIDAY...North winds 10 to 15 knots. A moderate chop on the bay.
.FRIDAY NIGHT...Northeast 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.
.SATURDAY...North winds around 5 knots, becoming east late in the
afternoon. Smooth on the bay, increasing to light chop in the
afternoon.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on
the bay.
.SUNDAY...Southeast winds 10 to 15 knots. A moderate chop on the
bay.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to
5 to 10 knots early in the morning. A moderate chop on the bay,
diminishing to light chop early in the morning.
.MONDAY...Southeast winds 10 to 15 knots. A moderate chop on the
bay.
.MONDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop
on the bay.
.TUESDAY...Southeast winds 10 to 15 knots. A moderate chop on the
bay. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop
on the bay. A slight chance of showers and thunderstorms early in
the evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-091630-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1046 PM CDT Thu Oct 8 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.REST OF TONIGHT...Northeast winds 10 to 15 knots. Seas 4 to
5 feet. Wave Detail: East 5 feet at 8 seconds.
.FRIDAY...North winds 10 to 15 knots. Seas 6 to 8 feet,
occasionally to 10 feet. Wave Detail: East 7 feet at 9 seconds. A
slight chance of showers in the afternoon. A slight chance of
thunderstorms early in the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots, diminishing to
5 to 10 knots after midnight. Seas 6 to 8 feet, occasionally to
10 feet. Wave Detail: East 7 feet at 10 seconds.
.SATURDAY...North winds around 5 knots, becoming northeast late
in the afternoon. Seas 6 to 8 feet, occasionally to 10 feet. Wave
Detail: East 7 feet at 11 seconds.
.SATURDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 3 to 5 feet. Wave Detail: East 5 feet at
11 seconds.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: East 4 feet at 8 seconds.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
.MONDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
.MONDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
.TUESDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds around 15 knots. Seas 3 to
4 feet. A slight chance of showers and thunderstorms early in the
evening.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-091630-
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-
1046 PM CDT Thu Oct 8 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.REST OF TONIGHT...Northeast winds 10 to 15 knots, increasing to
15 to 20 knots early this morning. Seas 5 to 7 feet, occasionally
to 9 feet. Wave Detail: East 6 feet at 8 seconds.
.FRIDAY...Northeast winds 15 to 20 knots. Seas 6 to 9 feet,
occasionally to 11 feet. Wave Detail: Northeast 7 feet at
8 seconds and east 7 feet at 9 seconds. A slight chance of
thunderstorms. A slight chance of showers in the morning, then a
chance of showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots, diminishing to
5 to 10 knots early in the morning. Seas 7 to 9 feet,
occasionally to 11 feet. Wave Detail: East 8 feet at 10 seconds.
A slight chance of showers early in the evening.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 7 to 9 feet,
occasionally to 11 feet, subsiding to 5 to 7 feet, occasionally
to 9 feet in the afternoon. Wave Detail: East 8 feet at
12 seconds, becoming east 7 feet at 11 seconds.
.SATURDAY NIGHT...East winds 5 to 10 knots, becoming southeast
10 to 15 knots after midnight. Seas 4 to 5 feet. Wave Detail:
East 5 feet at 11 seconds.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave
Detail: East 4 feet at 9 seconds.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots, becoming around
15 knots early in the morning. Seas 3 to 5 feet.
.MONDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
A slight chance of showers and thunderstorms early in the
evening.
.TUESDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet. A slight chance of showers and thunderstorms early in the
evening.

Winds and seas higher in and near thunderstorms.

$$