197
FZUS54 KBRO 291746
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1246 PM CDT Mon Sep 29 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.

GMZ100-300630-
1246 PM CDT Mon Sep 29 2025

.SYNOPSIS...Weak high pressure will combine with a weak area of
low pressure about 100 nm east of southern Tamaulipas and northern
Veracruz to maintain light to moderate northeast winds and slight
to moderate seas through Wednesday. Weak high pressure will cover
the area Wednesday night and early Thursday, with a continuation
of mainly light winds and slight seas. Moderate to strong high
pressure will develop over the southeast U.S. Thursday and Friday,
and a broad east to northeast gradient will form between it and
lower pressure over the southwest Gulf and northwest Caribbean.
Seas will become moderate with an increasing swell period Friday
and especially Saturday, and east to northeast winds may increase
as well.


$$

GMZ130-132-135-300630-
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-
1246 PM CDT Mon Sep 29 2025

.TONIGHT...Northeast winds 5 to 10 knots. Light chop on the bay.
.TUESDAY...North winds 5 to 10 knots, becoming northeast late in
the afternoon. Light chop on the bay.
.TUESDAY NIGHT...East winds 5 to 10 knots, becoming around
5 knots after midnight. Light chop on the bay.
.WEDNESDAY...Northeast winds 5 to 10 knots. Light chop on the
bay.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Light chop on the bay.
.THURSDAY...Northwest winds around 5 knots, becoming northeast in
the afternoon. Smooth on the bay, increasing to light chop in the
afternoon.
.THURSDAY NIGHT...East winds 5 to 10 knots. Light chop on the
bay.
.FRIDAY...Northeast winds 5 to 10 knots. Light chop on the bay. A
chance of showers. A slight chance of thunderstorms in the
afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Light chop on the
bay. A slight chance of thunderstorms early in the evening. A
chance of showers.
.SATURDAY...Northeast winds 5 to 10 knots. Light chop on the bay.
A chance of showers with a slight chance of thunderstorms.
.SATURDAY NIGHT...East winds 5 to 10 knots. Light chop on the
bay. A chance of showers with a slight chance of thunderstorms
early in the evening, then a slight chance of showers late in the
evening. A chance of showers after midnight.

Winds and waves higher in and near thunderstorms Friday through
Saturday night.

$$

GMZ150-155-300630-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1246 PM CDT Mon Sep 29 2025

.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds. A slight chance of showers
early this morning.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 6 seconds. A slight chance of showers
early in the afternoon.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots, becoming east
after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at
6 seconds. A slight chance of showers in the late evening and
overnight.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 6 seconds. A slight chance of showers
in the morning.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at
6 seconds.
.THURSDAY...East winds around 5 knots, becoming northeast in the
afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
6 seconds.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers after midnight.
.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A
chance of showers. A slight chance of thunderstorms in the
afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
A chance of showers with a slight chance of thunderstorms.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet. A
chance of showers with a slight chance of thunderstorms.
.SATURDAY NIGHT...East winds around 10 knots, becoming 5 to
10 knots early in the morning. Seas 3 to 4 feet. A slight chance
of thunderstorms early in the evening. A chance of showers.

Winds and seas higher in and near thunderstorms Friday through
Saturday.

$$

GMZ170-175-300630-
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-
1246 PM CDT Mon Sep 29 2025

.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 6 seconds. A slight chance of showers
after midnight.
.TUESDAY...Northeast winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 3 feet at 6 seconds. A slight chance of
showers in the morning, then a chance of showers early in the
afternoon. A slight chance of showers late in the afternoon.
.TUESDAY NIGHT...Northeast winds around 10 knots, becoming east
after midnight. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet
at 6 seconds. A slight chance of showers.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 2 feet at 6 seconds. A slight chance of
showers.
.WEDNESDAY NIGHT...East winds around 10 knots, becoming 5 to
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East
2 feet at 6 seconds.
.THURSDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 6 seconds. A slight chance of showers.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers in the evening, then a chance of showers
after midnight.
.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A
chance of showers. A slight chance of thunderstorms in the
afternoon.
.FRIDAY NIGHT...Northeast winds around 10 knots. Seas 2 to
3 feet. A slight chance of thunderstorms. A chance of showers in
the evening, then showers likely after midnight.
.SATURDAY...Northeast winds around 10 knots. Seas 3 to 5 feet. A
slight chance of thunderstorms. Showers likely until late
afternoon, then a chance of showers late in the afternoon.
.SATURDAY NIGHT...East winds around 10 knots. Seas 4 to 5 feet. A
slight chance of thunderstorms early in the evening. A chance of
showers.

Winds and seas higher in and near thunderstorms Friday through
Saturday night.

$$

52/BSG