709
FZUS54 KHGX 190519
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
1219 AM CDT Tue Aug 19 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.

GMZ300-191815-
1219 AM CDT Tue Aug 19 2025

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

A weak pressure gradient will remain in place for a good part of the
week, which will lead to a prevailing landbreeze and seabreeze
circulation featuring variable to offshore wind directions late at
night and in the morning and a more moderate onshore winds in the
afternoons and evenings. Models are indicating the potential for
some scattered strong storms during the first part of Tuesday with
a passing upper disturbance. Otherwise, a somewhat unsettled
weather pattern is expected as the week progresses with chances of
showers and thunderstorms on a daily basis.

$$

GMZ335-191815-
Galveston Bay-
1219 AM CDT Tue Aug 19 2025

.TODAY...North winds around 5 to 10 knots, becoming southeast
late. Gusts up to 30 knots expected with any strong storms. Bay
waters smooth. A chance of showers and thunderstorms early this
morning, then showers and thunderstorms likely late this morning.
A chance of showers and thunderstorms this afternoon.
.TONIGHT...South winds 5 to 10 knots, becoming west after
midnight. Bay waters smooth. A slight chance of showers and
thunderstorms.
.WEDNESDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southwest winds around 5 knots, becoming
northwest after midnight. Bay waters smooth. A chance of showers
and thunderstorms.
.THURSDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. Showers likely. A chance of
thunderstorms in the morning, then thunderstorms likely in the
afternoon.
.THURSDAY NIGHT...Southeast winds around 5 knots, becoming north
after midnight. Bay waters smooth. A chance of thunderstorms. A
chance of showers in the evening, then showers likely after
midnight.
.FRIDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of thunderstorms. Showers
likely, mainly in the morning.
.FRIDAY NIGHT...Southeast winds around 5 knots, becoming
southwest after midnight. Bay waters smooth. A chance of showers
and thunderstorms after midnight.
.SATURDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.SATURDAY NIGHT...Southeast winds around 5 knots, becoming
southwest after midnight. Bay waters smooth. A chance of showers
and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ330-191815-
Matagorda Bay-
1219 AM CDT Tue Aug 19 2025

.TODAY...Northwest winds around 5 to 10 knots, becoming east
early this afternoon, then becoming southeast late. Bay waters
smooth. A chance of showers and thunderstorms.
.TONIGHT...Southeast winds 5 to 10 knots, becoming north after
midnight. Bay waters smooth. A chance of showers and
thunderstorms, mainly in the evening.
.WEDNESDAY...North winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of showers. A chance
of thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, becoming
southwest after midnight. Bay waters smooth. A chance of showers
and thunderstorms after midnight.
.THURSDAY...Northwest winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of thunderstorms.
Showers likely, mainly in the morning.
.THURSDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Bay waters smooth. A chance of showers. A chance
of thunderstorms after midnight.
.FRIDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth. A
chance of showers and thunderstorms after midnight.
.SATURDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Bay waters smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ350-355-191815-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
1219 AM CDT Tue Aug 19 2025

.TODAY...North winds 5 to 10 knots, becoming east late. Seas
around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds. A
chance of showers and thunderstorms early this morning, then
showers and thunderstorms likely late this morning. A chance of
showers and thunderstorms this afternoon.
.TONIGHT...South winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: East 1 foot at 3 seconds. A slight chance of showers and
thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: East 1 foot at
3 seconds. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...South winds around 5 knots, becoming west
after midnight. Seas 1 foot or less. Wave Detail: East 1 foot at
3 seconds. A chance of showers and thunderstorms after midnight.
.THURSDAY...Northwest winds 5 to 10 knots, becoming south in the
afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at
2 seconds. A chance of thunderstorms. Showers likely, mainly in
the morning.
.THURSDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
A chance of thunderstorms. A chance of showers in the evening,
then showers likely after midnight.
.FRIDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Seas 1 foot or less. A chance of thunderstorms.
Showers likely, mainly in the morning.
.FRIDAY NIGHT...South winds around 5 knots. Seas 1 foot or less.
A chance of showers and thunderstorms after midnight.
.SATURDAY...Northwest winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. A chance of showers and
thunderstorms.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 foot or less. A chance of showers after
midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ370-375-191815-
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-
1219 AM CDT Tue Aug 19 2025

.TODAY...North winds 5 to 10 knots, becoming northeast late. Seas
around 2 feet. Wave Detail: Northeast 1 foot at 2 seconds and
southeast 1 foot at 5 seconds. Thunderstorms likely this morning.
Showers likely. A chance of thunderstorms this afternoon.
.TONIGHT...East winds around 5 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 4 seconds. A slight chance of showers
in the evening, then a chance of showers with a slight chance of
thunderstorms after midnight.
.WEDNESDAY...North winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 4 seconds. A chance of showers and
thunderstorms in the morning.
.WEDNESDAY NIGHT...Southeast winds around 5 knots, becoming west
after midnight. Seas 1 foot or less. Wave Detail: East 1 foot at
3 seconds. A chance of showers and thunderstorms after midnight.
.THURSDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 2 seconds and east 1 foot at
3 seconds. A chance of thunderstorms. Showers likely, mainly in
the morning.
.THURSDAY NIGHT...South winds around 5 knots. Seas 1 foot or
less. A chance of showers and thunderstorms after midnight.
.FRIDAY...West winds around 5 knots, becoming northeast in the
afternoon. Seas 1 foot or less. Showers likely with a chance of
thunderstorms in the morning.
.FRIDAY NIGHT...Southeast winds around 5 knots. Seas 1 foot or
less. A chance of showers and thunderstorms after midnight.
.SATURDAY...West winds around 5 knots, becoming east in the
afternoon. Seas 1 foot or less. Showers likely with a chance of
thunderstorms in the morning.
.SATURDAY NIGHT...Southeast winds around 5 knots. Seas 1 foot or
less. A chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$