914
FZUS54 KBRO 131737
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1237 PM CDT Wed Aug 13 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.

GMZ100-140615-
1237 PM CDT Wed Aug 13 2025

.SYNOPSIS...Favorable conditions prevail through at least Thursday
with gentle to moderate southeasterly flow and slight seas. There
is a chance of isolated showers and thunderstorms over the waters
each day through Thursday, and afternoon heating may lead to
temporary Small Craft Exercise Caution conditions on the Laguna
Madre and nearshore waters each afternoon. An influx of tropical
moisture expected as a tropical wave tracks towards the area by
Friday, increasing seas to 2-4 feet and bringing a low to
moderate chance (30-50%) of rain Friday and Saturday.

$$

GMZ130-132-135-140615-
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-
1237 PM CDT Wed Aug 13 2025

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

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-140615-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1237 PM CDT Wed Aug 13 2025

.TONIGHT...Southeast winds 10 to 15 knots, becoming south early
this morning. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
4 seconds.
.THURSDAY...South winds around 10 knots, becoming southeast late
in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet
at 5 seconds.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
4 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight
chance of showers and thunderstorms after midnight.
.FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers
and thunderstorms.
.SATURDAY...Southeast winds around 10 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 7 seconds. A chance of showers
and thunderstorms until late afternoon.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to
5 to 10 knots early in the morning. Seas 3 to 4 feet.
.SUNDAY...Southeast winds 5 to 10 knots, becoming east late in
the afternoon. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.MONDAY...Southeast winds around 5 knots, becoming east in the
afternoon. Seas 2 to 3 feet.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-140615-
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-
1237 PM CDT Wed Aug 13 2025

.TONIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.THURSDAY...South winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A chance of
showers with a slight chance of thunderstorms after midnight. A
chance of showers and thunderstorms early in the morning.
.FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 6 seconds. A chance of thunderstorms.
Showers likely.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 5 feet.
Wave Detail: Southeast 4 feet at 6 seconds. A chance of
thunderstorms. Showers likely early in the evening, then a chance
of showers in the late evening and overnight.
.SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 4 feet at 7 seconds. A chance of showers
and thunderstorms early in the morning, then a slight chance of
showers and thunderstorms in the afternoon.
.SATURDAY NIGHT...Southeast winds around 10 knots. Seas 3 to
4 feet.
.SUNDAY...Southeast winds 5 to 10 knots, becoming east late in
the afternoon. Seas 2 to 3 feet. A slight chance of showers and
thunderstorms.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.MONDAY...Southeast winds around 5 knots, becoming east in the
afternoon. Seas 2 to 3 feet. A slight chance of showers and
thunderstorms until late afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$