National Weather Service Marine Forecast FZUS54 KHGX

FZUS54 KHGX 201642
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
1142 AM CDT Thu Aug 20 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.

GMZ300-210515
1142 AM CDT Thu Aug 20 2026

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

Light to occasionally moderate southwest to south winds and 2 to 3 foot seas are expected over the next several days. Winds may occasionally gust up to 20 knots during the afternoon in the bays, and during the overnight hours in the Gulf.

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GMZ335-210515
Galveston Bay
1142 AM CDT Thu Aug 20 2026

THIS AFTERNOON
Southwest winds around 10 knots, becoming south 10 to 15 knots with gusts up to 20 knots. Bay waters smooth, increasing to slightly choppy.

TONIGHT
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.

SUNDAY
Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon.

SUNDAY NIGHT
Southwest winds 10 to 15 knots. Bay waters slightly choppy.

MONDAY
Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon.

MONDAY NIGHT
South winds 10 to 15 knots. Bay waters slightly choppy.

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GMZ330-210515
Matagorda Bay
1142 AM CDT Thu Aug 20 2026

THIS AFTERNOON
South winds 10 to 15 knots. Bay waters slightly choppy.

TONIGHT
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 around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon.

SATURDAY NIGHT
South winds 10 to 15 knots. Bay waters slightly choppy.

SUNDAY
Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Bay waters smooth, increasing to slightly choppy in the afternoon.

SUNDAY NIGHT
South winds 10 to 15 knots. Bay waters slightly choppy.

MONDAY
South winds 5 to 10 knots. Bay waters smooth.

MONDAY NIGHT
South winds 10 to 15 knots. Bay waters slightly choppy.

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GMZ350-355-210515
Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM-Coastal waters from High Island to Freeport TX out 20 NM
1142 AM CDT Thu Aug 20 2026

THIS AFTERNOON
Southwest winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds.

TONIGHT
South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds.

FRIDAY
Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds.

FRIDAY NIGHT
Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds.

SATURDAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds.

SATURDAY NIGHT
Southwest winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds.

SUNDAY
Southwest winds 5 to 10 knots. Seas around 2 feet.

SUNDAY NIGHT
South winds 10 to 15 knots. Seas around 2 feet.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet.

MONDAY NIGHT
South winds 10 to 15 knots. Seas 2 to 3 feet.

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GMZ370-375-210515
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
1142 AM CDT Thu Aug 20 2026

THIS AFTERNOON
Southwest winds 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds and southeast 1 foot at 8 seconds.

TONIGHT
South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds and southeast 1 foot at 8 seconds.

FRIDAY
Southwest winds 10 to 15 knots, diminishing to around 10 knots in the afternoon. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds and southeast 1 foot at 8 seconds.

FRIDAY NIGHT
Southwest winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds.

SATURDAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds.

SATURDAY NIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 5 seconds.

SUNDAY
Southwest winds 5 to 10 knots. Seas around 2 feet.

SUNDAY NIGHT
South winds 5 to 10 knots. Seas around 2 feet.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet.

MONDAY NIGHT
South winds around 10 knots, increasing to 10 to 15 knots after midnight. Seas 2 to 3 feet.