Coastal Waters Forecast
Issued by NWS Brownsville, TX

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129
FZUS54 KBRO 131858
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
158 PM CDT Mon Oct 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.

GMZ100-140715-
158 PM CDT Mon Oct 13 2025

.SYNOPSIS...Generally favorable conditions are expected through
the period. Light to moderate onshore winds, moderate to slight
seas, and low rain chances should prevail through much of the
week. However, tropical moisture increasing over the region may
bring a low to medium chance of rain on Tuesday.

$$

GMZ130-132-135-140715-
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-
158 PM CDT Mon Oct 13 2025

.TONIGHT...East winds 5 to 10 knots. Light chop on the bay. A
slight chance of showers after midnight.
.TUESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Light chop on the bay, increasing to a moderate
chop in the afternoon. A slight chance of showers in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. 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, diminishing to smooth
after midnight.
.THURSDAY...Southeast winds around 5 knots, increasing to 5 to
10 knots in the afternoon. Smooth on the bay, increasing to light
chop in the afternoon.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Light chop on
the bay.
.FRIDAY...Southeast winds 5 to 10 knots. Light chop on the bay.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. A moderate chop
on the bay.
.SATURDAY...South winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Light chop on the bay, increasing to a
moderate chop in the afternoon.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
5 to 10 knots after midnight. A moderate chop on the bay,
diminishing to light chop after midnight.

$$

GMZ150-155-140715-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
158 PM CDT Mon Oct 13 2025

.TONIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet. Wave
Detail: East 3 feet at 7 seconds. A slight chance of showers late
this evening. A chance of showers after midnight, then a slight
chance of showers early this morning.
.TUESDAY...East winds around 10 knots. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 6 seconds. A slight chance of showers in
the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 5 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at
5 seconds and southeast 1 foot at 6 seconds.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 1 foot at 6 seconds.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to
3 feet.
.FRIDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 4 feet.
.SATURDAY...Southeast winds around 10 knots. Seas 3 to 4 feet.
.SATURDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet.

$$

GMZ170-175-140715-
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-
158 PM CDT Mon Oct 13 2025

.TONIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 7 seconds. A slight chance of showers
early this evening. A chance of showers late this evening, then a
slight chance of showers after midnight.
.TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: East 4 feet at 6 seconds. A slight chance of showers
early in the morning.
.TUESDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 5 seconds.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 5 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at
6 seconds.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to
3 feet. A slight chance of showers after midnight.
.FRIDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 4 feet.
.SATURDAY...South winds around 10 knots. Seas 3 to 4 feet.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet.

$$