525
FZUS54 KHGX 201927
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
127 PM CST Thu Nov 20 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.

GMZ300-210815-
127 PM CST Thu Nov 20 2025

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

Light to moderate onshore flow should continue for the next
several days with Gulf seas of 2 to 4 feet. Isolated to widely
scattered showers are expected today and tomorrow. A weak frontal
boundary may enhance shower and thunderstorm chances somewhat on
Saturday. Winds on Saturday may generally become lighter and
potentially more variable. The next weather system will move into
the area sometime Monday, bringing another chance of showers and
storms. Onshore winds increase ahead of the system, potentially
warranting caution flags on Monday.

$$

GMZ335-210815-
Galveston Bay-
127 PM CST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 10 to 15 knots with gusts up to
20 knots. Bay waters slightly choppy. A slight chance of showers.
.TONIGHT...Southeast winds 10 to 15 knots. Bay waters slightly
choppy.
.FRIDAY...South winds 5 to 10 knots. Bay waters smooth. A chance
of showers in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth. A
chance of showers after midnight.
.SATURDAY...Northwest winds 5 to 10 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of showers in the
morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming
northeast after midnight. Bay waters smooth, increasing to smooth
to slightly choppy after midnight.
.SUNDAY...East winds around 10 knots. Bay waters smooth to
slightly choppy.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters
slightly choppy.
.MONDAY...South winds 15 to 20 knots. Bay waters choppy. A chance
of showers in the morning, then showers likely in the afternoon.
.MONDAY NIGHT...Southwest winds 10 to 15 knots. Bay waters
slightly choppy. A chance of thunderstorms. Showers likely.

Winds and waves higher in and near thunderstorms.

$$

GMZ330-210815-
Matagorda Bay-
127 PM CST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 15 to 20 knots with gusts up to
25 knots. Bay waters choppy.
.TONIGHT...Southeast winds 10 to 15 knots. Bay waters slightly
choppy.
.FRIDAY...South winds 10 to 15 knots. Bay waters slightly choppy.
A chance of showers in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth. A
chance of showers after midnight.
.SATURDAY...East winds 5 to 10 knots. Bay waters smooth. A chance
of showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Bay waters slightly
choppy.
.SUNDAY...Southeast winds 10 to 15 knots. Bay waters slightly
choppy.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Bay waters
choppy.
.MONDAY...South winds 15 to 20 knots. Bay waters choppy. A chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots, becoming west after
midnight. Bay waters slightly choppy. A chance of thunderstorms
in the evening. A chance of showers.

Winds and waves higher in and near thunderstorms.

$$

GMZ350-355-210815-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
127 PM CST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
5 seconds. A slight chance of showers.
.TONIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 6 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 6 seconds. A chance of showers after
midnight.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds. A chance of showers.
.SATURDAY NIGHT...East winds around 10 knots, increasing to 10 to
15 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast
3 feet at 6 seconds.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Seas 2 to 4 feet.
.MONDAY...South winds 15 to 20 knots. Seas 3 to 4 feet. A chance
of showers.
.MONDAY NIGHT...South winds 15 to 20 knots, becoming southwest
around 15 knots after midnight. Seas 3 to 4 feet. A chance of
thunderstorms in the evening. Showers likely.

Winds and seas higher in and near thunderstorms.

$$

GMZ370-375-210815-
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-
127 PM CST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 10 to 15 knots. Seas around
3 feet. Wave Detail: Southeast 3 feet at 5 seconds. A chance of
showers early, then a slight chance of showers late.
.TONIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds.
.FRIDAY...South winds 10 to 15 knots. Seas around 3 feet. Wave
Detail: South 3 feet at 6 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 3 feet.
Wave Detail: South 3 feet at 6 seconds.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds. A chance of showers in the
morning.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southeast 2 feet at 6 seconds.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds around 15 knots, becoming south
15 to 20 knots after midnight. Seas 3 to 5 feet.
.MONDAY...South winds 15 to 20 knots. Seas 4 to 5 feet. A chance
of showers in the afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 5 feet.
Showers likely.

$$