465
FZUS54 KHGX 181115
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
615 AM CDT Tue Aug 18 2026

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.

GMZ300-190015-
615 AM CDT Tue Aug 18 2026

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

A prevailing south to southeast flow and seas of 2-3 feet will
continue for the next several days. Winds may become more
southwesterly overnight and during the early morning hours. High
pressure will dominate the weather pattern, leading to persistent
hot and dry weather.

$$

GMZ335-190015-
Galveston Bay-
615 AM CDT Tue Aug 18 2026

.TODAY...Southwest winds 5 to 10 knots, becoming south early this
afternoon, then increasing to 10 to 15 knots late. Bay waters
smooth, increasing to slightly choppy late.
.TONIGHT...Southwest winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY...Southwest winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Bay waters slightly choppy.
.THURSDAY...Southwest winds around 10 knots, becoming south 10 to
15 knots with gusts up to 20 knots in the afternoon. Bay waters
smooth, increasing to slightly choppy in the afternoon.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots. Bay waters
slightly choppy.
.FRIDAY...Southwest winds around 10 knots, becoming south 10 to
15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Bay waters
slightly choppy.
.SATURDAY...West winds around 10 knots, becoming south 10 to
15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots. Bay waters
slightly choppy.

$$

GMZ330-190015-
Matagorda Bay-
615 AM CDT Tue Aug 18 2026

.TODAY...South winds around 10 knots, increasing to 10 to
15 knots late. Bay waters smooth, increasing to slightly choppy
late.
.TONIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY...South winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Bay waters
slightly choppy.
.THURSDAY...South winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.FRIDAY...Southwest winds around 10 knots, becoming south 10 to
15 knots in the afternoon. Bay waters smooth, increasing to
slightly choppy in the afternoon.
.FRIDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.SATURDAY...Southwest winds 5 to 10 knots. Bay waters smooth.
.SATURDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.

$$

GMZ350-355-190015-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
615 AM CDT Tue Aug 18 2026

.TODAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 1 foot at 5 seconds.
.TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.WEDNESDAY...Southwest winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
5 seconds.
.THURSDAY...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 5 seconds.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.FRIDAY...Southwest winds 10 to 15 knots, diminishing to around
10 knots in the afternoon. Seas around 2 feet.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet.
.SATURDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to
3 feet.

$$

GMZ370-375-190015-
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-
615 AM CDT Tue Aug 18 2026

.TODAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.TONIGHT...South winds around 10 knots, increasing to 10 to
15 knots after midnight. Seas around 2 feet. Wave Detail: South
2 feet at 4 seconds.
.WEDNESDAY...Southwest winds 10 to 15 knots, becoming south
around 10 knots in the afternoon. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 5 seconds.
.THURSDAY...Southwest winds 10 to 15 knots, becoming south around
10 knots in the afternoon. Seas around 2 feet. Wave Detail: South
2 feet at 4 seconds.
.THURSDAY NIGHT...South winds around 10 knots, increasing to
10 to 15 knots after midnight. Seas around 2 feet. Wave Detail:
South 2 feet at 5 seconds.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas 2 to
3 feet.

$$