539
FZUS54 KHGX 221121
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
621 AM CDT Fri Aug 22 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.

GMZ300-230015-
621 AM CDT Fri Aug 22 2025

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

A diffuse frontal boundary will linger near the coast the next
couple days, but with a very weak pressure gradient in place we
will continue to see a prevailing landbreeze and seabreeze
circulation. Expect light offshore wind directions late at night
and in the mornings followed by light onshore winds in the
afternoon and evenings with the passing seabreeze. 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.

$$

GMZ335-230015-
Galveston Bay-
621 AM CDT Fri Aug 22 2025

.TODAY...Northeast winds 5 to 10 knots, becoming southeast late.
Bay waters smooth. Showers and thunderstorms likely.
.TONIGHT...Northeast winds 5 to 10 knots. Bay waters smooth.
Showers and thunderstorms likely, mainly in the evening.
.SATURDAY...Northeast 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.
.SATURDAY NIGHT...Southeast winds around 5 knots, becoming
southwest after midnight. Bay waters smooth. A chance of showers
and thunderstorms.
.SUNDAY...North winds around 5 knots, becoming southeast in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.SUNDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Bay waters smooth.
.MONDAY...North winds around 5 knots, becoming southeast in the
afternoon. Bay waters smooth.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.TUESDAY...Northwest winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth. A chance of showers and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ330-230015-
Matagorda Bay-
621 AM CDT Fri Aug 22 2025

.TODAY...North winds 5 to 10 knots, becoming southeast late. Bay
waters smooth. A chance of showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Bay waters smooth. A chance
of showers and thunderstorms in the evening, then showers and
thunderstorms likely after midnight.
.SATURDAY...Northeast winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. Showers likely. Thunderstorms
likely, mainly in the morning.
.SATURDAY NIGHT...East winds 5 to 10 knots, becoming south after
midnight. Bay waters smooth. A chance of showers and
thunderstorms.
.SUNDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of thunderstorms. Showers
likely, mainly in the morning.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Bay waters smooth.
.MONDAY...North winds around 5 knots, becoming southeast in the
afternoon. Bay waters smooth. A chance of showers. A chance of
thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth. A
chance of showers and thunderstorms after midnight.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth. A chance
of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth. A chance of showers and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ350-355-230015-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
621 AM CDT Fri Aug 22 2025

.TODAY...Variable winds 5 to 10 knots, becoming east late. Seas
around 2 feet. Showers and thunderstorms, mainly this morning.
.TONIGHT...East winds 5 to 10 knots. Seas 1 foot or less. A
chance of showers and thunderstorms in the evening, then showers
and thunderstorms likely after midnight.
.SATURDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
2 seconds. Showers likely. Thunderstorms likely, mainly in the
morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 1 foot or less. Wave Detail: East 1 foot at
2 seconds. A chance of thunderstorms. A chance of showers in the
evening, then showers likely after midnight.
.SUNDAY...North winds around 5 knots, becoming east in the
afternoon. Seas 1 foot or less. A chance of thunderstorms.
Showers likely, mainly in the morning.
.SUNDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Seas 1 foot or less. Wave Detail: Southeast
1 foot at 2 seconds.
.MONDAY...North winds around 5 knots, becoming southeast in the
afternoon. Seas 1 foot or less. A chance of showers and
thunderstorms in the morning.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms after midnight.
.TUESDAY...South winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ370-375-230015-
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-
621 AM CDT Fri Aug 22 2025

.TODAY...Variable winds 5 to 10 knots, becoming northeast this
afternoon. Seas around 2 feet. Showers and thunderstorms likely
early this morning, then a chance of showers and thunderstorms
late this morning and afternoon.
.TONIGHT...East winds 5 to 10 knots, becoming south after
midnight. Seas 1 foot or less. A chance of showers and
thunderstorms in the evening, then showers and thunderstorms
likely after midnight.
.SATURDAY...North winds around 5 knots, becoming northeast in the
afternoon. Seas 1 foot or less. Showers and thunderstorms likely,
mainly in the morning.
.SATURDAY NIGHT...East winds around 5 knots, becoming south after
midnight. Seas 1 foot or less. Wave Detail: East 1 foot at
2 seconds. A chance of thunderstorms. A chance of showers in the
evening, then showers likely after midnight.
.SUNDAY...Northwest winds around 5 knots, becoming east around
5 knots in the afternoon. Seas 1 foot or less. Wave Detail:
Southwest 1 foot at 2 seconds and northeast 1 foot at 2 seconds.
A chance of thunderstorms. Showers likely, mainly in the morning.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: East 1 foot at 2 seconds. A chance of showers after
midnight.
.MONDAY...Southwest winds around 5 knots, becoming southeast in
the afternoon. Seas 1 foot or less. A chance of showers and
thunderstorms in the morning.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms after midnight.
.TUESDAY...Southeast winds around 5 knots. Seas around 2 feet. A
chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$