139
FZUS54 KBRO 110615
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1215 AM CST Thu Dec 11 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.

GMZ100-111915-
1215 AM CST Thu Dec 11 2025

.SYNOPSIS...Favorable marine conditions are expected to continue
into this weekend, with an approaching frontal boundary increasing
winds and seas Sunday into early next week. This could result in a
period of adverse marine conditions. The chance of showers and
isolated thunderstorms returns Friday night into next week.

$$

GMZ130-132-135-111915-
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-
1215 AM CST Thu Dec 11 2025

.TODAY...North winds 5 to 10 knots, becoming northeast late this
afternoon. Light chop on the bay.
.TONIGHT...East winds around 5 knots, becoming south after
midnight. Smooth on the bay.
.FRIDAY...South winds 5 to 10 knots, becoming southeast late in
the afternoon. Light chop on the bay.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on the
bay. A slight chance of showers and thunderstorms after midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Light chop on the bay.
A slight chance of thunderstorms in the morning. A slight chance
of showers.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on
the bay.
.SUNDAY...Northeast winds 5 to 10 knots, increasing to 15 to
20 knots. Light chop on the bay, increasing to choppy. A chance
of showers with a slight chance of thunderstorms.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots. Choppy on the
bay. A slight chance of showers in the evening.
.MONDAY...Northeast winds 10 to 15 knots. A moderate chop on the
bay.
.MONDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Light chop on the bay.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-111915-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1215 AM CST Thu Dec 11 2025

.TODAY...North winds 10 to 15 knots, becoming northeast 5 to
10 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 5 seconds.
.TONIGHT...East winds around 5 knots, becoming southeast in the
late evening and early morning, then becoming south early in the
morning. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at
6 seconds and southeast 1 foot at 3 seconds.
.FRIDAY...South winds 5 to 10 knots, becoming southeast late in
the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
5 seconds.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: Southeast 2 feet at 5 seconds. A chance of showers
and thunderstorms after midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds. A slight chance of
thunderstorms. A chance of showers, mainly in the morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to
3 feet. Wave Detail: Southeast 2 feet at 6 seconds. A slight
chance of showers and thunderstorms after midnight.
.SUNDAY...Northeast winds 5 to 10 knots, increasing to 15 to
20 knots. Seas 2 to 3 feet. A chance of showers with a slight
chance of thunderstorms.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to 4 feet,
building to 4 to 6 feet, occasionally to 8 feet after midnight. A
slight chance of showers.
.MONDAY...Northeast winds 10 to 15 knots. Seas 5 to 7 feet,
occasionally to 9 feet, subsiding to 4 to 5 feet in the
afternoon.
.MONDAY NIGHT...East winds around 10 knots, becoming southeast
after midnight. Seas 4 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-111915-
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-
1215 AM CST Thu Dec 11 2025

.TODAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 6 seconds and southwest 1 foot at
4 seconds. A slight chance of showers this afternoon.
.TONIGHT...East winds 5 to 10 knots, becoming southeast late in
the evening, then becoming south 10 to 15 knots after midnight.
Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and
northeast 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. A slight chance of showers
early in the afternoon. A slight chance of showers and
thunderstorms late in the afternoon.
.FRIDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. Wave Detail: Southeast 2 feet at 5 seconds. A slight
chance of showers and thunderstorms in the evening, then a chance
of showers and thunderstorms after midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to
4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A slight
chance of showers and thunderstorms after midnight.
.SUNDAY...Northeast winds 5 to 10 knots, increasing to 15 to
20 knots. Seas 3 to 4 feet. Showers likely with a slight chance
of thunderstorms.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. A chance of showers, mainly in the
evening.
.MONDAY...Northeast winds 10 to 15 knots. Seas 5 to 7 feet,
occasionally to 9 feet. A slight chance of showers in the
morning.
.MONDAY NIGHT...East winds around 10 knots, becoming southeast
after midnight. Seas 4 to 6 feet, occasionally to 8 feet.

Winds and seas higher in and near thunderstorms.

$$