National Weather Service Marine Forecast FZUS54 KHGX

FZUS54 KHGX 181714
CWFHGX

Coastal Waters Forecast for Texas
National Weather Service Houston/Galveston TX
1114 AM CST Sun Jan 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.

GMZ300-190615
1114 AM CST Sun Jan 18 2026

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

Low Water Advisory remains in effect for both bays through later this evening. These water levels should improve to some degree tonight as onshore winds return, however, mariners should still be mindful of negative tide levels through early next week, especially at low tide. Cannot rule out additional low water headlines for now. Next cold front will stall out around the coast early on Tuesday with onshore winds returning as the boundary gradually lifts north into Wednesday. Expect more widespread rainfall on Wednesday and Thursday as another weather system pushes through.

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GMZ335-190615
Galveston Bay
1114 AM CST Sun Jan 18 2026

LOW WATER ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING

THIS AFTERNOON
Northwest winds 5 to 10 knots. Bay waters smooth.

TONIGHT
Southwest winds 5 to 10 knots. Bay waters smooth.

MONDAY
Northwest winds around 5 knots, becoming east in the afternoon. Bay waters smooth.

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

TUESDAY
East winds 10 to 15 knots. Bay waters slightly choppy.

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Bay waters slightly choppy.

WEDNESDAY
Southeast winds 10 to 15 knots. Bay waters slightly choppy. Showers.

WEDNESDAY NIGHT
Southeast winds around 10 knots, becoming northeast after midnight. Bay waters smooth to slightly choppy, increasing to slightly choppy after midnight. Showers likely, mainly in the evening.

THURSDAY
East winds 10 to 15 knots. Bay waters slightly choppy.

THURSDAY NIGHT
East winds around 10 knots. Bay waters smooth to slightly choppy.

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GMZ330-190615
Matagorda Bay
1114 AM CST Sun Jan 18 2026

LOW WATER ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING

THIS AFTERNOON
Northwest winds around 5 knots, becoming west late. Bay waters smooth.

TONIGHT
Southwest winds 5 to 10 knots. Bay waters smooth.

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

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

TUESDAY
East winds 15 to 20 knots. Bay waters choppy.

TUESDAY NIGHT
East winds 15 to 20 knots, becoming southeast around 15 knots after midnight. Bay waters choppy, diminishing to slightly choppy after midnight. A chance of showers after midnight.

WEDNESDAY
Southeast winds 10 to 15 knots. Bay waters slightly choppy. Showers.

WEDNESDAY NIGHT
Northeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers in the evening.

THURSDAY
East winds 10 to 15 knots. Bay waters slightly choppy.

THURSDAY NIGHT
East winds 10 to 15 knots. Bay waters slightly choppy.

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GMZ350-355-190615
Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM-Coastal waters from High Island to Freeport TX out 20 NM
1114 AM CST Sun Jan 18 2026

THIS AFTERNOON
Northwest winds 5 to 10 knots, becoming around 5 knots late. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 6 seconds.

TONIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 6 seconds and southwest 1 foot at 2 seconds.

MONDAY
Southeast winds 5 to 10 knots, becoming east in the afternoon. Seas around 2 feet. Wave Detail: East 2 feet at 4 seconds.

MONDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 3 seconds.

TUESDAY
East winds 15 to 20 knots. Seas 2 to 4 feet. Wave Detail: East 4 feet at 4 seconds.

TUESDAY NIGHT
Southeast winds 15 to 20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 5 seconds. A chance of showers after midnight.

WEDNESDAY
Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Showers.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 5 feet. Showers likely, mainly in the evening.

THURSDAY
East winds 15 to 20 knots, diminishing to around 15 knots in the afternoon. Seas 3 to 5 feet.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 5 feet.

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GMZ370-375-190615
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
1114 AM CST Sun Jan 18 2026

THIS AFTERNOON
North winds 10 to 15 knots with gusts up to 20 knots, becoming northwest around 10 knots late. Seas 3 to 4 feet, building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 4 feet at 7 seconds, becoming northeast 5 feet at 7 seconds.

TONIGHT
Southwest winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 6 seconds.

MONDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Northeast 2 feet at 5 seconds.

MONDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds.

TUESDAY
East winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds.

TUESDAY NIGHT
Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 5 seconds. A chance of showers after midnight.

WEDNESDAY
Southeast winds 15 to 20 knots. Seas 4 to 5 feet. Showers.

WEDNESDAY NIGHT
Southeast winds around 15 knots, becoming east after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Showers, mainly in the evening.

THURSDAY
East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A chance of showers in the morning.

THURSDAY NIGHT
East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet.