Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX

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FZUS54 KHGX 120800
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
300 AM CDT Wed Mar 12 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.

GMZ300-122015-
Synopsis for High Island to the Matagorda Ship Channel out
60 nautical miles including Galveston and Matagorda Bays
300 AM CDT Wed Mar 12 2025

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

Caution flags are in effect today offshore as sustained winds
increase to 15 to 20 knots, with wind speeds at times bordering
on advisory levels. A weak boundary is expected to move through
the area later today, briefly shifting winds to the southwest.
There might be a brief window of opportunity for sea fog during
the early morning hours on Thursday near the coast and in the
bays. Another frontal boundary is expected to push offshore on
Saturday, bringing a shift to offshore winds.


$$

GMZ335-122015-
Galveston Bay-
300 AM CDT Wed Mar 12 2025

.TODAY...South winds around 15 knots, rising to 15 to 20 knots
late. Bay waters slightly choppy, rising to choppy late. Patchy
fog early this morning.
.TONIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy. Patchy fog.
.THURSDAY...Southwest winds around 10 knots, becoming south 10 to
15 knots late. Bay waters smooth, rising to slightly choppy late.
Patchy fog in the morning.
.THURSDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.FRIDAY...South winds around 15 knots. Bay waters slightly choppy
to choppy.
.FRIDAY NIGHT...South winds 10 to 15 knots, becoming southwest
around 10 knots after midnight. Bay waters slightly choppy,
easing to smooth after midnight.
.SATURDAY...West winds around 10 knots, rising to 10 to 15 knots
in the afternoon. Bay waters smooth, rising to slightly choppy in
the afternoon.
.SATURDAY NIGHT...West winds 10 to 15 knots, becoming northwest
around 10 knots after midnight. Bay waters slightly choppy,
easing to smooth after midnight.
.SUNDAY...Northwest winds around 10 knots. Bay waters smooth to
slightly choppy.
.SUNDAY NIGHT...North winds 10 to 15 knots, easing to around
10 knots after midnight. Bay waters slightly choppy, easing to
smooth after midnight.

$$

GMZ330-122015-
Matagorda Bay-
300 AM CDT Wed Mar 12 2025

.TODAY...South winds around 15 knots, rising to 15 to 20 knots
late. Bay waters slightly choppy, rising to choppy late. Patchy
fog early this morning.
.TONIGHT...South winds 10 to 15 knots, veering to southwest late.
Bay waters slightly choppy. Patchy fog.
.THURSDAY...Southwest winds around 10 knots, becoming south 10 to
15 knots late. Bay waters smooth, rising to slightly choppy late.
Patchy fog in the morning.
.THURSDAY NIGHT...South winds around 15 knots, rising to 15 to
20 knots after midnight. Bay waters choppy. Patchy fog after
midnight.
.FRIDAY...South winds 10 to 15 knots. Bay waters slightly choppy.
.FRIDAY NIGHT...South winds 10 to 15 knots, becoming southwest
around 10 knots after midnight. Bay waters slightly choppy,
easing to smooth after midnight.
.SATURDAY...Northwest winds 10 to 15 knots. Bay waters slightly
choppy.
.SATURDAY NIGHT...Northwest winds 10 to 15 knots. Bay waters
slightly choppy.
.SUNDAY...Northwest winds 10 to 15 knots. Bay waters slightly
choppy.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters
slightly choppy.

$$

GMZ350-355-122015-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
300 AM CDT Wed Mar 12 2025

...Small Craft Should Exercise Caution...

.TODAY...South winds around 15 knots. Seas 3 to 5 feet. Wave
Detail: South 3 feet at 5 seconds.
.TONIGHT...South winds around 15 knots. Seas 3 to 5 feet. Wave
Detail: South 4 feet at 6 seconds. Patchy fog.
.THURSDAY...Southwest winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: South 4 feet at 6 seconds. Patchy fog until late
afternoon.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: South 3 feet at 5 seconds.
.FRIDAY...South winds around 15 knots. Seas 3 to 4 feet. Wave
Detail: South 4 feet at 5 seconds.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: South 4 feet at 6 seconds.
.SATURDAY...Northwest winds around 10 knots, becoming west 10 to
15 knots in the afternoon. Seas 3 to 4 feet.
.SATURDAY NIGHT...West winds 10 to 15 knots, veering to northwest
after midnight. Seas 3 to 4 feet.
.SUNDAY...Northwest winds 10 to 15 knots. Seas 3 to 5 feet.
.SUNDAY NIGHT...North winds 10 to 15 knots. Seas 3 to 5 feet.

$$

GMZ370-375-122015-
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-
300 AM CDT Wed Mar 12 2025

...Small Craft Should Exercise Caution...

.TODAY...South winds around 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: South 4 feet at 5 seconds.
.TONIGHT...South winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: South 4 feet at 6 seconds.
Patchy fog after midnight.
.THURSDAY...Southwest winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: Southwest 4 feet at 6 seconds. Patchy fog until late
afternoon.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 5 feet.
Wave Detail: South 3 feet at 5 seconds.
.FRIDAY...South winds 15 to 20 knots. Seas 3 to 5 feet. Wave
Detail: South 4 feet at 6 seconds.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: South 4 feet at 6 seconds.
.SATURDAY...West winds around 10 knots, rising to 10 to 15 knots
in the afternoon. Seas 4 to 5 feet.
.SATURDAY NIGHT...West winds 10 to 15 knots, veering to northwest
after midnight. Seas 4 to 5 feet.
.SUNDAY...Northwest winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet.
.SUNDAY NIGHT...North winds around 15 knots. Seas 4 to 5 feet.

$$