431
FZUS54 KHGX 220123
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
823 PM CDT Thu Aug 21 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.

GMZ300-221430-
823 PM CDT Thu Aug 21 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.

$$

GMZ335-221430-
Galveston Bay-
823 PM CDT Thu Aug 21 2025

.TONIGHT...Variable winds around 5 knots, becoming north after
midnight. Bay waters smooth. A chance of showers and
thunderstorms.
.FRIDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. Showers and thunderstorms likely.
.FRIDAY NIGHT...Northeast winds around 5 knots. Bay waters
smooth. A chance of thunderstorms. A chance of showers in the
evening, then showers likely after midnight.
.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 5 to 10 knots, becoming
southwest after midnight. Bay waters smooth. A chance of showers
and thunderstorms after midnight.
.SUNDAY...North winds 5 to 10 knots, becoming east 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...Northwest winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.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.

$$

GMZ330-221430-
Matagorda Bay-
823 PM CDT Thu Aug 21 2025

.TONIGHT...Variable winds 5 to 10 knots, becoming south after
midnight. Bay waters smooth. A chance of showers and
thunderstorms.
.FRIDAY...Northwest winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. Showers likely with a chance of
thunderstorms.
.FRIDAY NIGHT...East winds around 5 knots. Bay waters smooth. A
chance of thunderstorms. A chance of showers in the evening, then
showers likely after midnight.
.SATURDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. Showers likely with a chance of
thunderstorms.
.SATURDAY NIGHT...East winds 5 to 10 knots, becoming south after
midnight. Bay waters smooth. A chance of showers. A chance of
thunderstorms after midnight.
.SUNDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.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 around 10 knots. Bay waters
smooth to slightly choppy. A chance of showers and thunderstorms
after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ350-355-221430-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
823 PM CDT Thu Aug 21 2025

.TONIGHT...Variable winds 5 to 10 knots. Seas 1 foot or less. A
chance of showers and thunderstorms.
.FRIDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at
2 seconds. Showers likely. Thunderstorms likely, mainly in the
morning.
.FRIDAY NIGHT...East 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.
.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. A chance of thunderstorms. Showers likely, mainly in
the morning.
.SATURDAY NIGHT...East winds 5 to 10 knots, becoming south after
midnight. Seas 1 foot or less. Wave Detail: East 1 foot at
2 seconds and south 1 foot at 3 seconds. A chance of showers. A
chance of thunderstorms after midnight.
.SUNDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: Southwest 1 foot at
3 seconds. A chance of showers and thunderstorms.
.SUNDAY NIGHT...Southeast winds around 10 knots, becoming
southwest after midnight. Seas 1 foot or less, then around 2 feet
after midnight.
.MONDAY...Northwest winds 5 to 10 knots, becoming southeast in
the afternoon. Seas around 2 feet in the morning, then 1 foot or
less. A chance of showers and thunderstorms in the morning.
.MONDAY NIGHT...South winds around 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 10 to 15 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ370-375-221430-
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-
823 PM CDT Thu Aug 21 2025

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

Winds and seas higher in and near thunderstorms.

$$