049
FZUS54 KBRO 041739
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1239 PM CDT Thu Sep 4 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.

GMZ100-050615-
1239 PM CDT Thu Sep 4 2025

.SYNOPSIS...Generally favorable marine conditions are anticipated
through the forecast, with light to moderate winds and low to
moderate seas. Showers and thunderstorms are expected to increase
starting over the weekend and into the early part of next week.

$$

GMZ130-132-135-050615-
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-
1239 PM CDT Thu Sep 4 2025

.REST OF TODAY...Southeast winds 5 to 10 knots, increasing to
10 to 15 knots late this afternoon. Light chop on the bay,
increasing to a moderate chop late this afternoon.
.TONIGHT...Southeast winds 10 to 15 knots, becoming south after
midnight. A moderate chop on the bay.
.FRIDAY...South winds around 10 knots, becoming southeast in the
afternoon. A moderate chop on the bay.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
early in the morning. A moderate chop on the bay, diminishing to
light chop early in the morning. A slight chance of showers in
the evening, then a chance of showers after midnight. A slight
chance of thunderstorms early in the morning.
.SATURDAY...South winds 5 to 10 knots, becoming southeast early
in the afternoon, then becoming east 10 to 15 knots late in the
afternoon. Light chop on the bay, increasing to a moderate chop
late in the afternoon. Showers likely. A slight chance of
thunderstorms early in the morning, then a chance of
thunderstorms in the afternoon.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on
the bay. Showers likely with a chance of thunderstorms early in
the evening, then a chance of showers in the late evening and
overnight. A slight chance of thunderstorms after midnight.
.SUNDAY...Southeast winds around 5 knots, becoming east in the
afternoon. Light chop on the bay. Showers likely with a slight
chance of thunderstorms early in the morning, then showers likely
with a chance of thunderstorms in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots. Light chop on the bay.
Showers likely with a slight chance of thunderstorms in the
evening, then showers with a chance of thunderstorms after
midnight.
.MONDAY...East winds 5 to 10 knots. Light chop on the bay. A
chance of thunderstorms. Showers.
.MONDAY NIGHT...East winds 5 to 10 knots. Light chop on the bay.
A chance of thunderstorms. Showers likely.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-050615-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1239 PM CDT Thu Sep 4 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-050615-
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-
1239 PM CDT Thu Sep 4 2025

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

Winds and seas higher in and near thunderstorms.

$$