National Weather Service National Headquarters

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FZUS54 KHGX 212013
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
313 PM CDT Sun Apr 21 2024

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.

GMZ300-220915-
Synopsis for High Island to the Matagorda Ship Channel out
60 nautical miles including Galveston and Matagorda Bays
313 PM CDT Sun Apr 21 2024

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

Moderate NE winds this afternoon will veer and become more ENE tonight.
Wind speeds should stay up across the marine area including the
bays around 20 knots or so...so planning to stick with a lower end
Small Craft Advisory until 12Z Monday. The gradient should
slacken enough by Monday to drop winds below SCA levels but will
still be somewhat breezy as high pressure builds in from the N.
The high shifts E on Tuesday with return onshore flow kicking in.
This sets the stage for a warming trend and increasing levels of
humidity as we go through the week. A tightening pressure gradient
will lead to strengthening south and southeasterly flow and
building seas by late in the week. Should be mainly free of any
rain across the waters for at least the next 5 days.

$$

GMZ335-220915-
Galveston Bay-
313 PM CDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.TONIGHT...North winds 20 to 25 knots, becoming northeast around
20 knots late this evening and overnight. Bay waters rough,
becoming choppy late this evening and overnight.
.MONDAY...Northeast winds 15 to 20 knots, becoming east around
15 knots in the late morning and afternoon. Bay waters choppy,
becoming slightly choppy in the late morning and afternoon.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters smooth.
.TUESDAY...Southeast winds around 10 knots, increasing to 10 to
15 knots in the afternoon. Bay waters slightly choppy.
.TUESDAY NIGHT...South winds 15 to 20 knots, diminishing to
around 10 knots. Bay waters choppy, becoming smooth.
.WEDNESDAY...Southeast winds around 10 knots, increasing to 10 to
15 knots in the afternoon. Bay waters smooth, becoming slightly
choppy in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy.
.THURSDAY...Southeast winds around 10 knots, increasing to around
15 knots in the afternoon. Bay waters smooth to slightly choppy,
becoming slightly choppy to choppy in the afternoon.
.THURSDAY NIGHT...Southeast winds around 15 knots. Bay waters
slightly choppy to choppy.
.FRIDAY...South winds 15 to 20 knots. Bay waters choppy.
.FRIDAY NIGHT...South winds around 15 knots. Bay waters slightly
choppy to choppy.

$$

GMZ330-220915-
Matagorda Bay-
313 PM CDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.TONIGHT...North winds 20 to 25 knots, becoming northeast around
20 knots late this evening and overnight. Bay waters rough,
becoming choppy late this evening and overnight.
.MONDAY...Northeast winds 15 to 20 knots, becoming east around
15 knots in the late morning and afternoon. Bay waters choppy,
becoming slightly choppy in the late morning and early afternoon,
then becoming slightly choppy to choppy late.
.MONDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to
around 10 knots after midnight. Bay waters slightly choppy,
becoming smooth after midnight.
.TUESDAY...Southeast winds around 10 knots, increasing to 10 to
15 knots in the afternoon. Bay waters slightly choppy.
.TUESDAY NIGHT...Southeast winds 15 to 20 knots, diminishing to
around 15 knots after midnight. Bay waters choppy, becoming
slightly choppy after midnight.
.WEDNESDAY...Southeast winds around 10 knots, increasing to 15 to
20 knots in the afternoon. Bay waters smooth to slightly choppy,
becoming choppy in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 15 to 20 knots, diminishing to
around 15 knots after midnight. Bay waters choppy, becoming
slightly choppy after midnight.
.THURSDAY...Southeast winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Bay waters
choppy.
.FRIDAY...South winds 15 to 20 knots. Bay waters choppy.
.FRIDAY NIGHT...Southeast winds around 15 knots. Bay waters
slightly choppy to choppy.

$$

GMZ350-355-220915-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
313 PM CDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.TONIGHT...Northeast winds 20 to 25 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet.
.MONDAY...Northeast winds 20 to 25 knots, becoming east around
15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet.
.MONDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.WEDNESDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 2 to
4 feet.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 4 to 5 feet.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet.

$$

GMZ370-375-220915-
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-
313 PM CDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.TONIGHT...Northeast winds 20 to 25 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet.
.MONDAY...Northeast winds 20 to 25 knots, becoming east around
15 knots. Seas 6 to 7 feet with occasional seas up to 9 feet,
subsiding to 4 to 6 feet with occasional seas up to 8 feet in the
afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots, becoming southeast
late. Seas 3 to 5 feet.
.TUESDAY...Southeast winds around 10 knots. Seas 2 to 3 feet.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.WEDNESDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to
5 feet.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 4 to 5 feet.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 5 to 6 feet
with occasional seas up to 8 feet.

$$