738
FZUS54 KBRO 180527
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1227 AM CDT Mon Aug 18 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.

GMZ100-181815-
1227 AM CDT Mon Aug 18 2025

.SYNOPSIS...Day-to-day or near day-to-day chances for showers and
thunderstorms will begin to increase on Tuesday and persist
through next weekend. Otherwise, favorable marine conditions are
expected along the Lower Texas Coast through the forecast period,
with light to moderate winds and low seas.

$$

GMZ130-132-135-181815-
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-
1227 AM CDT Mon Aug 18 2025

.TODAY...Southeast winds around 5 knots becoming east this
afternoon. Smooth on the bay becoming light chop this afternoon.
.TONIGHT...Southeast winds 5 to 10 knots becoming south after
midnight. Light chop on the bay becoming smooth after midnight.
.TUESDAY...West winds around 5 knots becoming east in the
afternoon. Smooth on the bay becoming light chop in the
afternoon. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...East winds 5 to 10 knots becoming south after
midnight. Light chop on the bay becoming smooth after midnight. A
slight chance of showers and thunderstorms after midnight.
.WEDNESDAY...Northwest winds around 5 knots becoming east in the
afternoon. Smooth on the bay becoming light chop in the
afternoon. A chance of showers in the morning. A slight chance of
thunderstorms. A slight chance of showers in the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots becoming south after
midnight. Light chop on the bay becoming smooth after midnight.
.THURSDAY...Northwest winds around 5 knots becoming east in the
afternoon. Smooth on the bay becoming light chop in the
afternoon. A slight chance of showers and thunderstorms in the
afternoon.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Light chop on the bay becoming smooth after
midnight. A slight chance of showers after midnight.
.FRIDAY...South winds around 5 knots becoming east in the
afternoon. Smooth on the bay becoming light chop in the
afternoon. A slight chance of showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Light chop on the bay. A slight chance of showers
and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-181815-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1227 AM CDT Mon Aug 18 2025

.TODAY...Southeast winds around 5 knots becoming east this
afternoon. Seas 1 to 2 feet. Wave Detail: East 2 feet at
5 seconds.
.TONIGHT...East winds 5 to 10 knots becoming southeast after
midnight. Seas 1 to 2 feet. Wave Detail: East 2 feet at
5 seconds.
.TUESDAY...West winds around 5 knots becoming northeast in the
afternoon. Seas 1 to 2 feet. Wave Detail: East 1 foot at
5 seconds. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...East winds 5 to 10 knots becoming south after
midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
5 seconds. A slight chance of showers and thunderstorms after
midnight.
.WEDNESDAY...Northwest winds around 5 knots becoming northeast
around 5 knots in the afternoon. Seas 1 to 2 feet. Wave Detail:
East 1 foot at 5 seconds. A chance of showers with a slight
chance of thunderstorms in the morning, then a slight chance of
showers in the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots becoming south after
midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
3 seconds.
.THURSDAY...Northwest winds around 5 knots becoming northeast in
the afternoon. Seas 1 to 2 feet. A slight chance of showers. A
slight chance of thunderstorms in the afternoon.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Seas 1 to 2 feet. A slight chance of showers
after midnight.
.FRIDAY...Southwest winds around 5 knots becoming east in the
afternoon. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-181815-
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-
1227 AM CDT Mon Aug 18 2025

.TODAY...Southeast winds around 5 knots becoming northeast this
afternoon. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at
5 seconds.
.TONIGHT...East winds 5 to 10 knots becoming southeast after
midnight. Seas 1 to 2 feet. Wave Detail: East 2 feet at
5 seconds.
.TUESDAY...Northwest winds around 5 knots becoming northeast
around 5 knots in the afternoon. Seas 1 to 2 feet. Wave Detail:
Northeast 1 foot at 2 seconds and east 1 foot at 5 seconds. A
chance of showers and thunderstorms in the morning. A slight
chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...East winds 5 to 10 knots becoming southeast
after midnight. Seas 1 to 2 feet. Wave Detail: East 1 foot at
4 seconds. A chance of showers with a slight chance of
thunderstorms after midnight.
.WEDNESDAY...Northwest winds around 5 knots becoming northeast
around 5 knots in the afternoon. Seas 1 to 2 feet. Wave Detail:
East 1 foot at 4 seconds. A chance of showers with a slight
chance of thunderstorms in the morning.
.WEDNESDAY NIGHT...East winds around 5 knots becoming southeast
around 5 knots after midnight. Seas 1 to 2 feet. Wave Detail:
East 1 foot at 3 seconds. A slight chance of showers and
thunderstorms after midnight.
.THURSDAY...Northwest winds around 5 knots becoming northeast in
the afternoon. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms in the morning.
.THURSDAY NIGHT...East winds around 5 knots becoming south after
midnight. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms after midnight.
.FRIDAY...Southwest winds around 5 knots becoming east in the
afternoon. Seas 1 to 2 feet. A chance of showers with a slight
chance of thunderstorms in the morning.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Seas 1 to 2 feet. A chance of showers with a
slight chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$