897
FZUS54 KHGX 201025
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
525 AM CDT Wed Aug 20 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.

GMZ300-202315-
525 AM CDT Wed Aug 20 2025

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

A prevailing landbreeze and seabreeze circulation is expected,
featuring variable to offshore wind directions late at night and
in the morning and a more moderate onshore winds in the
afternoons and evenings. A daily risk of scattered showers and
thunderstorms continues through the end of the week. Locally
higher winds and rougher seas will be possible in the vicinity of
any thunderstorm.

$$

GMZ335-202315-
Galveston Bay-
525 AM CDT Wed Aug 20 2025

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

Winds and waves higher in and near thunderstorms.

$$

GMZ330-202315-
Matagorda Bay-
525 AM CDT Wed Aug 20 2025

.TODAY...North winds around 5 knots, becoming southeast this
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms.
.TONIGHT...Southeast winds 5 to 10 knots, becoming west after
midnight. Bay waters smooth. A chance of showers and
thunderstorms after midnight.
.THURSDAY...Northwest winds 5 to 10 knots, becoming southwest in
the afternoon. Bay waters smooth. Showers likely with a chance of
thunderstorms.
.THURSDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Bay waters smooth. 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. Bay waters smooth. A chance of thunderstorms. Showers
likely, mainly in the morning.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Bay waters smooth. A chance of showers. A chance
of 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 5 to 10 knots, becoming south
after midnight. Bay waters smooth.
.SUNDAY...Northwest winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of showers in the
morning.
.SUNDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ350-355-202315-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
525 AM CDT Wed Aug 20 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ370-375-202315-
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-
525 AM CDT Wed Aug 20 2025

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

Winds and seas higher in and near thunderstorms.

$$