692
FZUS54 KHGX 180546
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
1246 AM CDT Sat Oct 18 2025

Upper Texas coastal waters from High Island to the Matagorda Ship
Channel out 60 nautical miles including Galveston and Matagorda
Bays.

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.

GMZ300-181830-
1246 AM CDT Sat Oct 18 2025

.Synopsis For High Island to the Matagorda Ship Channel Out 60 NM
including Galveston and Matagorda Bays.

Light to moderate southerly flow along with isolated to scattered
showers and thunderstorms are expected ahead of an approaching
frontal boundary today. The front pushes offshore tomorrow
morning, bringing gusty north to northeast winds in its wake. It
is possible that Small Craft Advisories will be warranted for the
Gulf waters and the bays on Sunday. Winds decrease and veer Sunday
night into Monday. Mostly southeast flow is expected through much
of next week. However, a period of northeast flow is possible on
Wednesday behind a frontal boundary.

$$

GMZ335-181830-
Galveston Bay-
1246 AM CDT Sat Oct 18 2025

.REST OF TONIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy.
.SATURDAY...South winds 10 to 15 knots. Bay waters slightly
choppy. A slight chance of showers and thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots, becoming
northwest after midnight. Bay waters slightly choppy, diminishing
to smooth to slightly choppy after midnight. A chance of showers
in the evening.
.SUNDAY...North winds 15 to 20 knots with gusts up to 25 knots.
Bay waters choppy.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters
slightly choppy.
.MONDAY...East winds around 10 knots, becoming southeast in the
afternoon. Bay waters smooth to slightly choppy.
.MONDAY NIGHT...South winds around 10 knots. Bay waters smooth to
slightly choppy.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming
northeast after midnight. Bay waters smooth, increasing to smooth
to slightly choppy after midnight.
.WEDNESDAY...East winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY NIGHT...Southeast winds around 10 knots. Bay waters
smooth to slightly choppy.

Winds and waves higher in and near thunderstorms.

$$

GMZ330-181830-
Matagorda Bay-
1246 AM CDT Sat Oct 18 2025

.REST OF TONIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy. A slight chance of showers and thunderstorms
late.
.SATURDAY...South winds 10 to 15 knots. Bay waters slightly
choppy.
.SATURDAY NIGHT...South winds around 10 knots, becoming west
after midnight. Bay waters smooth to slightly choppy.
.SUNDAY...North winds 15 to 20 knots with gusts up to 25 knots.
Bay waters choppy.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters
slightly choppy.
.MONDAY...Southeast winds around 10 knots. Bay waters smooth to
slightly choppy.
.MONDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth.
.TUESDAY NIGHT...Southeast winds around 10 knots. Bay waters
smooth to slightly choppy.
.WEDNESDAY...East winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy.

Winds and waves higher in and near thunderstorms.

$$

GMZ350-355-181830-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
1246 AM CDT Sat Oct 18 2025

.REST OF TONIGHT...Southeast winds around 15 knots. Seas 3 to
4 feet. Wave Detail: Southeast 4 feet at 6 seconds. A slight
chance of showers and thunderstorms.
.SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A slight chance of showers
and thunderstorms.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots, becoming west
after midnight. Seas 2 to 3 feet. Wave Detail: South 3 feet at
5 seconds.
.SUNDAY...North winds around 20 knots, increasing to 20 to
25 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: North
3 feet at 5 seconds.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots, becoming east
around 15 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Northeast 3 feet at 5 seconds and southwest 1 foot at 3 seconds.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.TUESDAY...South winds 10 to 15 knots, diminishing to around
10 knots in the afternoon. Seas 2 to 3 feet.
.TUESDAY NIGHT...Southeast winds around 10 knots, becoming east
10 to 15 knots after midnight. Seas around 2 feet.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas around
2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ370-375-181830-
Waters from Freeport to Matagorda Ship Channel TX from 20 to
60 NM-Waters from High Island to Freeport TX from 20 to 60 NM-
1246 AM CDT Sat Oct 18 2025

.REST OF TONIGHT...Southeast winds around 15 knots with gusts up
to 20 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at
6 seconds. A slight chance of showers and thunderstorms, then a
chance of showers and thunderstorms late.
.SATURDAY...South winds 10 to 15 knots. Seas around 3 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A slight chance of
thunderstorms. A chance of showers, mainly in the morning.
.SATURDAY NIGHT...Southwest winds around 10 knots, becoming west
after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet
at 6 seconds and southwest 2 feet at 4 seconds.
.SUNDAY...North winds 20 to 25 knots with gusts up to 30 knots.
Seas 2 to 4 feet. Wave Detail: North 4 feet at 5 seconds.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots, becoming east
around 15 knots after midnight. Seas 2 to 4 feet. Wave Detail:
Northeast 4 feet at 6 seconds and southwest 1 foot at 5 seconds.
.MONDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 6 seconds.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.TUESDAY...South winds 5 to 10 knots. Seas 2 to 3 feet.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas around
2 feet.

Winds and seas higher in and near thunderstorms.

$$