888
FZUS54 KBRO 011747
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
1247 PM CDT Mon Sep 1 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.

GMZ100-020630-
1247 PM CDT Mon Sep 1 2025

.SYNOPSIS...Favorable marine conditions hold as light and variable
winds and slight seas prevail, becoming gentle to moderate by
Friday with slight to moderate seas over the weekend.
Probabilities of showers and thunderstorms increase to a medium to
a high (40-70%) chance by tomorrow morning before decreasing
throughout the afternoon and evening hours down to a less than
15% chance tomorrow night, persisting through Friday as high
pressure takes over. More unsettled weather is expected this
weekend.

$$

GMZ130-132-135-020630-
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-
1247 PM CDT Mon Sep 1 2025

.REST OF TODAY...Northeast winds 5 to 10 knots. Light chop on the
bay. A slight chance of showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots, becoming southeast after
midnight, then becoming southwest early in the morning. Light
chop on the bay, diminishing to smooth after midnight. A slight
chance of showers and thunderstorms after midnight. A chance of
showers and thunderstorms early in the morning.
.TUESDAY...West winds around 5 knots, becoming northeast in the
afternoon. Smooth on the bay, increasing to light chop in the
afternoon. A chance of showers and thunderstorms.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots, becoming
northwest early in the morning. Light chop on the bay,
diminishing to smooth early in the morning. A chance of showers
and thunderstorms early in the evening. A slight chance of
thunderstorms after midnight. A slight chance of showers after
midnight.
.WEDNESDAY...North winds 5 to 10 knots, becoming northeast in the
afternoon. Smooth on the bay, increasing to light chop in the
afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming south early
in the morning. Light chop on the bay, diminishing to smooth
early in the morning.
.THURSDAY...Southwest winds around 5 knots, becoming east in the
afternoon. Smooth on the bay, increasing to light chop in the
afternoon.
.THURSDAY NIGHT...Southeast winds around 10 knots, becoming 5 to
10 knots after midnight. Light chop on the bay.
.FRIDAY...South winds 5 to 10 knots, becoming southeast early in
the afternoon, then increasing to 10 to 15 knots late in the
afternoon. Light chop on the bay, increasing to a moderate chop
late in the afternoon.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop
on the bay. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-020630-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
1247 PM CDT Mon Sep 1 2025

.REST OF TODAY...Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
Wave Detail: East 1 foot at 3 seconds and east 1 foot at
8 seconds. A slight chance of showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots, becoming southeast after
midnight, then becoming southwest early in the morning. Seas 1 to
2 feet. Wave Detail: East 1 foot at 4 seconds and east 1 foot at
8 seconds. A slight chance of showers and thunderstorms after
midnight. A chance of showers and thunderstorms early in the
morning.
.TUESDAY...West winds around 5 knots, becoming northwest late in
the morning, then becoming north early in the afternoon, becoming
northeast late in the afternoon. Seas 1 to 2 feet. Wave Detail:
North 2 feet at 3 seconds and southeast 1 foot at 4 seconds. A
chance of showers and thunderstorms until late afternoon, then a
slight chance of showers and thunderstorms late in the afternoon.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots, becoming north
early in the morning. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 4 seconds and east 1 foot at 8 seconds. A slight chance
of showers and thunderstorms after midnight.
.WEDNESDAY...North winds 5 to 10 knots, becoming northeast in the
afternoon. Seas 2 to 3 feet. Wave Detail: North 1 foot at
4 seconds and east 1 foot at 7 seconds. A slight chance of
showers and thunderstorms early in the morning.
.WEDNESDAY NIGHT...East winds around 10 knots, becoming 5 to
10 knots late in the evening, then becoming southeast after
midnight, becoming south early in the morning. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 4 seconds and east 1 foot at
7 seconds.
.THURSDAY...Southwest winds around 5 knots, becoming west around
5 knots late in the morning, then becoming east in the afternoon.
Seas 1 to 2 feet.
.THURSDAY NIGHT...Southeast winds around 10 knots. Seas 1 to
2 feet.
.FRIDAY...Southeast winds 5 to 10 knots, becoming around 10 knots
late in the afternoon. Seas 1 to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
A chance of showers with a slight chance of thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-020630-
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-
1247 PM CDT Mon Sep 1 2025

.REST OF TODAY...North winds around 5 knots. Seas 1 to 2 feet.
Wave Detail: Northeast 1 foot at 3 seconds and south 1 foot at
4 seconds. A slight chance of showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots, becoming around 5 knots
after midnight, then becoming south early in the morning. Seas
1 to 2 feet. Wave Detail: Northeast 1 foot at 3 seconds and
southeast 1 foot at 4 seconds. A slight chance of showers and
thunderstorms after midnight. A chance of showers and
thunderstorms early in the morning.
.TUESDAY...Northwest winds 5 to 10 knots, becoming north late in
the afternoon. Seas 2 to 3 feet. Wave Detail: North 2 feet at
4 seconds and east 1 foot at 8 seconds. Showers likely in the
morning. A chance of thunderstorms. A chance of showers in the
afternoon.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots, becoming north
early in the morning. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 4 seconds and east 1 foot at 8 seconds. A slight chance
of showers until early morning. A slight chance of thunderstorms
after midnight. A chance of showers early in the morning.
.WEDNESDAY...North winds 5 to 10 knots, becoming northeast late
in the afternoon. Seas 2 to 3 feet. Wave Detail: North 2 feet at
4 seconds and east 1 foot at 8 seconds. A slight chance of
showers and thunderstorms until late afternoon.
.WEDNESDAY NIGHT...Northeast winds around 10 knots, becoming east
late in the evening, then becoming southeast after midnight,
becoming south early in the morning. Seas 2 to 3 feet. Wave
Detail: North 2 feet at 4 seconds and east 1 foot at 7 seconds.
.THURSDAY...Southwest winds around 5 knots, becoming east late in
the afternoon. Seas 1 to 2 feet.
.THURSDAY NIGHT...East winds around 10 knots, becoming southeast
after midnight. Seas 1 to 2 feet.
.FRIDAY...Southeast winds 5 to 10 knots. Seas 1 to 2 feet. A
slight chance of showers early in the morning, then a slight
chance of showers and thunderstorms late in the morning.
.FRIDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. A slight chance of showers and thunderstorms in the
evening, then a chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$