578
FZUS54 KHGX 311800
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
100 PM CDT Thu Jul 31 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.

GMZ300-010615-
100 PM CDT Thu Jul 31 2025

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

Persistent low seas and light to occasionally moderate winds
driven by the daily seabreeze and landbreeze cycle are expected to
remain in place for the next several days. However, there will be
a continued daily risk of showers and thunderstorms. Locally heavy
thunderstorms are likely. Stronger winds and rougher seas can
occur in the vicinity of the thunderstorms. In some cases,
thunderstorm winds can extend far from the associated storm.

$$

GMZ335-010615-
Galveston Bay-
100 PM CDT Thu Jul 31 2025

.THIS AFTERNOON...Southwest winds 5 to 10 knots. Bay waters
smooth. A chance of showers and thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Bay waters smooth.
.FRIDAY...West winds 5 to 10 knots, becoming southwest in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots, becoming west after
midnight. Bay waters smooth. A chance of showers and
thunderstorms.
.SATURDAY...Northwest winds 5 to 10 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.SATURDAY NIGHT...South winds 5 to 10 knots, becoming west 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 showers and
thunderstorms.
.SUNDAY NIGHT...South winds 5 to 10 knots. 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.



$$

GMZ330-010615-
Matagorda Bay-
100 PM CDT Thu Jul 31 2025

.THIS AFTERNOON...South winds 5 to 10 knots. Bay waters smooth.
.TONIGHT...South winds around 10 knots. Bay waters smooth to
slightly choppy.
.FRIDAY...Southwest winds 5 to 10 knots, becoming south in the
afternoon. Bay waters smooth.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.SATURDAY...Southwest winds around 5 knots, becoming south in the
afternoon. Bay waters smooth.
.SATURDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.SUNDAY...Southwest winds 5 to 10 knots. Bay waters smooth.
.SUNDAY NIGHT...South winds around 10 knots. Bay waters smooth to
slightly choppy.
.MONDAY...South winds 5 to 10 knots, becoming southeast in the
afternoon. Bay waters smooth.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.

$$

GMZ350-355-010615-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
100 PM CDT Thu Jul 31 2025

.THIS AFTERNOON...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 5 seconds. A slight chance of
showers and thunderstorms.
.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less. Wave Detail: Southwest 2 feet
at 4 seconds, becoming southwest 1 foot at 4 seconds. A chance of
showers and thunderstorms.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 4 seconds.
.SATURDAY...West winds 5 to 10 knots, becoming southwest in the
afternoon. Seas 1 foot or less. Wave Detail: Southwest 1 foot at
4 seconds. A chance of showers and thunderstorms.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 4 seconds. A chance of showers
and thunderstorms.
.SUNDAY...West winds 5 to 10 knots, becoming south in the
afternoon. Seas 1 foot or less. A chance of showers and
thunderstorms.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet after midnight.
.MONDAY...Southwest winds 5 to 10 knots, becoming southeast in
the afternoon. Seas 1 foot or less. A chance of showers and
thunderstorms in the morning.
.MONDAY NIGHT...South winds around 10 knots. Seas around 2 feet.



$$

GMZ370-375-010615-
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-
100 PM CDT Thu Jul 31 2025

.THIS AFTERNOON...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 3 seconds and southeast
1 foot at 6 seconds. A slight chance of showers and
thunderstorms.
.TONIGHT...South winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: Southwest 1 foot at
3 seconds and southeast 1 foot at 6 seconds, becoming southwest
1 foot at 3 seconds.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less. Wave Detail: Southwest 2 feet
at 4 seconds, becoming southwest 1 foot at 4 seconds. A chance of
thunderstorms in the afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 4 seconds.
.SATURDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Southwest 1 foot at 4 seconds. A chance of showers and
thunderstorms in the morning.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 4 seconds. A chance of
showers and thunderstorms after midnight.
.SUNDAY...West winds 5 to 10 knots. Seas 1 foot or less. A chance
of showers and thunderstorms in the morning.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
.MONDAY...Southwest winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. A chance of showers and
thunderstorms in the morning.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less.



$$