Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX

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850
FZUS54 KHGX 181733
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
1233 PM CDT Sat Oct 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.

GMZ300-190630-
1233 PM CDT Sat Oct 18 2025

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

Southerly winds along with isolated showers will persist through
tonight. A cold front pushes offshore prior to sunrise Sunday,
bringing gusty north to northeast winds in its wake into Sunday
afternoon. A Small Craft Advisory has been issued from Sunday
morning through Sunday evening, primarily for the gusty winds
though seas should also build to 4 to 7 feet. Winds gradually
decrease late Sunday afternoon and night. Onshore flow resumes
Monday and continues Tuesday, followed by another front Wednesday.

$$

GMZ335-190630-
Galveston Bay-
1233 PM CDT Sat Oct 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...

.TONIGHT...Southwest winds 10 to 15 knots with gusts up to
20 knots, becoming west late. Bay waters slightly choppy.
.SUNDAY...North winds 15 to 20 knots with frequent gusts up to 30
knots. Bay waters choppy.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Bay waters slightly choppy.
.MONDAY...East winds around 10 knots, becoming southeast in the
afternoon. Bay waters smooth to slightly choppy.
.MONDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth.
.TUESDAY NIGHT...Southeast winds around 10 knots, becoming
northeast 10 to 15 knots with gusts up to 20 knots after
midnight. Bay waters smooth, increasing to slightly choppy after
midnight.
.WEDNESDAY...Northeast winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY NIGHT...East winds around 10 knots. Bay waters smooth
to slightly choppy.
.THURSDAY...Southeast winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy.

$$

GMZ330-190630-
Matagorda Bay-
1233 PM CDT Sat Oct 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...

.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots,
becoming west late. Bay waters slightly choppy.
.SUNDAY...North winds 15 to 20 knots with gusts up to 30 knots.
Bay waters choppy.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Bay waters slightly choppy.
.MONDAY...East winds around 10 knots, becoming southeast with
gusts up to 20 knots in the afternoon. Bay waters smooth to
slightly choppy, increasing to slightly choppy in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Bay waters slightly choppy.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth.
.TUESDAY NIGHT...South winds around 10 knots, becoming east with
gusts up to 20 knots after midnight. Bay waters smooth to
slightly choppy, increasing to slightly choppy after midnight.
.WEDNESDAY...East winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY...Southeast winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy.

$$

GMZ350-355-190630-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
1233 PM CDT Sat Oct 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...

.TONIGHT...Southwest winds 10 to 15 knots, becoming west late.
Seas 2 to 3 feet. Wave Detail: South 2 feet at 5 seconds.
.SUNDAY...North winds 20 to 25 knots with gusts up to 30 knots.
Seas 3 to 6 feet. Wave Detail: Northeast 4 feet at 5 seconds and
west 2 feet at 4 seconds.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
25 knots. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds.
.MONDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at
5 seconds.
.TUESDAY...South winds 10 to 15 knots, diminishing to around
10 knots in the afternoon. Seas 2 to 4 feet. Wave Detail:
Southeast 3 feet at 5 seconds.
.TUESDAY NIGHT...Southeast winds around 10 knots, becoming east
10 to 15 knots with gusts up to 20 knots after midnight. Seas
2 to 3 feet.
.WEDNESDAY...Northeast winds around 15 knots. Seas 3 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 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.

$$

GMZ370-375-190630-
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-
1233 PM CDT Sat Oct 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...

.TONIGHT...Southwest winds 10 to 15 knots, becoming west late.
Seas around 3 feet. Wave Detail: South 3 feet at 5 seconds.
.SUNDAY...North winds 20 to 25 knots with gusts up to 30 knots.
Seas 3 to 4 feet, building to 4 to 7 feet, occasionally to 8 feet
in the afternoon. Wave Detail: West 3 feet at 4 seconds and east
2 feet at 6 seconds, becoming north 5 feet at 5 seconds and
southwest 1 foot at 5 seconds. A slight chance of showers and
thunderstorms in the morning.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots, diminishing to
around 15 knots after midnight. Seas 3 to 5 feet. Wave Detail:
Northeast 5 feet at 5 seconds.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southeast 3 feet at 5 seconds.
.TUESDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.TUESDAY NIGHT...Southeast winds around 10 knots, becoming east
10 to 15 knots with gusts up to 20 knots after midnight. Seas
2 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...Southeast winds around 15 knots, increasing to
15 to 20 knots after midnight. Seas 3 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$