124
FZUS54 KHGX 181054
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
554 AM CDT Mon Aug 18 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.

GMZ300-182315-
554 AM CDT Mon Aug 18 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.

$$

GMZ335-182315-
Galveston Bay-
554 AM CDT Mon Aug 18 2025

.TODAY...Northwest winds around 5 knots, becoming east early this
afternoon, then becoming southeast 10 to 15 knots late. Bay
waters smooth, increasing to slightly choppy late. A slight
chance of showers and thunderstorms early this afternoon. A
chance of showers and thunderstorms late.
.TONIGHT...Southeast winds 10 to 15 knots, becoming north around
5 knots after midnight. Bay waters slightly choppy, diminishing
to smooth after midnight. A chance of showers and thunderstorms.
.TUESDAY...North winds around 5 knots, becoming southeast in the
afternoon. Bay waters smooth. Showers and thunderstorms likely,
mainly in the morning.
.TUESDAY NIGHT...South winds 10 to 15 knots, becoming southwest
around 5 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight.
.WEDNESDAY...Northwest winds around 5 knots, becoming east 10 to
15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...South winds 10 to 15 knots, becoming west
around 5 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight. A chance of showers and
thunderstorms.
.THURSDAY...Northwest winds around 5 knots, becoming southeast
10 to 15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon. A chance of showers and
thunderstorms.
.THURSDAY NIGHT...South winds 10 to 15 knots, becoming west
around 10 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight. A chance of showers and
thunderstorms.
.FRIDAY...Northwest winds around 5 knots, becoming east 10 to
15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon. Showers and thunderstorms
likely.
.FRIDAY NIGHT...South winds 10 to 15 knots, becoming southwest
around 10 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight. A chance of showers and
thunderstorms.



$$

GMZ330-182315-
Matagorda Bay-
554 AM CDT Mon Aug 18 2025

.TODAY...Southwest winds around 5 knots, becoming northwest
around 5 knots late this morning, then becoming southeast early
this afternoon, increasing to 10 to 15 knots late. Bay waters
smooth, increasing to slightly choppy late.
.TONIGHT...Southeast winds 10 to 15 knots, becoming southwest
around 5 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight. A slight chance of showers
and thunderstorms after midnight.
.TUESDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots, becoming
southwest around 5 knots after midnight. Bay waters slightly
choppy, diminishing to smooth after midnight. A chance of showers
and thunderstorms after midnight.
.WEDNESDAY...Northwest winds around 5 knots, becoming southeast
10 to 15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon. A chance of showers and
thunderstorms in the morning.
.WEDNESDAY NIGHT...South winds 10 to 15 knots, becoming southwest
around 10 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight.
.THURSDAY...West winds around 10 knots, becoming southeast 10 to
15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon. A chance of showers and
thunderstorms.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots, becoming
southwest around 10 knots after midnight. Bay waters slightly
choppy, diminishing to smooth after midnight. A chance of showers
and thunderstorms.
.FRIDAY...Northwest winds around 5 knots, becoming southeast
10 to 15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
around 10 knots after midnight. Bay waters slightly choppy,
diminishing to smooth after midnight. A chance of showers and
thunderstorms after midnight.



$$

GMZ350-355-370-375-182315-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
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-
554 AM CDT Mon Aug 18 2025

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



$$