343
FZUS54 KBRO 100540
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1140 PM CST Tue Dec 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.

GMZ100-101815-
1140 PM CST Tue Dec 9 2025

.SYNOPSIS...Favorable marine conditions are expected as gentle to
moderate southeasterly winds and slight to moderate seas prevail
through Saturday. Chances of rain increase Friday night into
Saturday to a low to medium (20 to 40%) chance.

$$

GMZ130-132-135-101815-
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-
1140 PM CST Tue Dec 9 2025

.REST OF TONIGHT...South winds 5 to 10 knots. Light chop on the
bay.
.WEDNESDAY...South winds 5 to 10 knots, becoming southeast late
in the afternoon. Light chop on the bay.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming northeast
after midnight. Light chop on the bay, diminishing to smooth late
in the evening, then increasing to light chop after midnight.
.THURSDAY...North winds 5 to 10 knots, becoming northeast late in
the afternoon. Light chop on the bay, diminishing to smooth late
in the afternoon.
.THURSDAY NIGHT...East winds around 5 knots, becoming south in
the late evening and overnight. Light chop on the bay.
.FRIDAY...South winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. A moderate chop on the bay.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on the
bay.
.SATURDAY...Southeast winds 5 to 10 knots. Light chop on the bay.
A slight chance of showers in the morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on
the bay.
.SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. A moderate chop on the bay. A slight chance of
thunderstorms in the morning. A slight chance of showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. A moderate chop on the
bay. A slight chance of showers after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-101815-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1140 PM CST Tue Dec 9 2025

.REST OF TONIGHT...South winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 7 seconds and south 2 feet at
3 seconds.
.WEDNESDAY...South winds 5 to 10 knots, becoming southeast late
in the afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at
4 seconds and east 2 feet at 7 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming north early
in the morning. Seas 2 to 3 feet. Wave Detail: East 2 feet at
7 seconds and southeast 1 foot at 4 seconds.
.THURSDAY...North winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 7 seconds and south 1 foot at 4 seconds.
.THURSDAY NIGHT...East winds 5 to 10 knots, becoming south 10 to
15 knots in the late evening and overnight. Seas 2 to 3 feet.
Wave Detail: Southeast 2 feet at 3 seconds and east 2 feet at
7 seconds.
.FRIDAY...South winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds.
.FRIDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. A slight chance of showers and thunderstorms after
midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms in the morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to
3 feet.
.SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas 2 to 3 feet. A chance of showers with a
slight chance of thunderstorms in the morning, then a slight
chance of showers in the afternoon.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet. A
slight chance of showers.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-101815-
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-
1140 PM CST Tue Dec 9 2025

.REST OF TONIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: East 3 feet at 7 seconds and south 2 feet at
3 seconds.
.WEDNESDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots early in the afternoon, then becoming south late in the
afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at
4 seconds and east 2 feet at 7 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming northeast
after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at
7 seconds and south 1 foot at 4 seconds.
.THURSDAY...Northeast winds 5 to 10 knots, becoming east late in
the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
7 seconds and south 1 foot at 4 seconds. A slight chance of
showers in the morning.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
10 to 15 knots after midnight. Seas 2 to 3 feet. Wave Detail:
South 2 feet at 3 seconds and east 2 feet at 6 seconds.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.FRIDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. A slight chance of showers and thunderstorms after
midnight.
.SATURDAY...Southeast winds around 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.
.SATURDAY NIGHT...Southeast winds around 10 knots. Seas 3 to
4 feet. A slight chance of showers and thunderstorms after
midnight.
.SUNDAY...East winds around 10 knots, becoming 10 to 15 knots in
the afternoon. Seas 3 to 4 feet. A chance of showers with a
slight chance of thunderstorms.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet. A
slight chance of showers in the evening, then a chance of showers
after midnight.

Winds and seas higher in and near thunderstorms.

$$