National Weather Service Marine Forecast FZUS54 KLCH

FZUS54 KLCH 200809
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
308 AM CDT Thu Aug 20 2026

Coastal waters from the Lower Atchafalaya River LA to High Island TX out 60 nautical miles including Sabine and Calcasieu Lakes and Vermilion and Cote Blanche Bays

Seas are provided as a range of the average height of the highest one third of the waves, along with the occasional height of the average highest ten percent of the waves.

GMZ400-202100
308 AM CDT Thu Aug 20 2026

.Synopsis for Lower Atchafalaya River LA to High Island TX out 60 NM including Sabine and Calcasieu Lakes and Vermilion and Cote Blanche Bays...

High pressure continues to dominate our weather pattern. Winds will remain light and mainly onshore with winds speeds between 5 and 15 knots. Waves will remain below 3 feet for the next several days.

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GMZ430-202100
Sabine Lake
308 AM CDT Thu Aug 20 2026

TODAY
Southwest winds 5 to 10 knots, becoming south late. Lake waters light chop.

TONIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

FRIDAY
West winds 5 to 10 knots. Lake waters light chop.

FRIDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

SATURDAY
Southwest winds 5 to 10 knots. Lake waters light chop.

SATURDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

SUNDAY
West winds around 5 knots, becoming southwest in the afternoon. Lake waters light chop.

SUNDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

MONDAY
Southwest winds 5 to 10 knots. Lake waters light chop.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

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GMZ432-202100
Calcasieu Lake
308 AM CDT Thu Aug 20 2026

TODAY
Southwest winds 5 to 10 knots, increasing to 10 to 15 knots late. Lake waters choppy.

TONIGHT
Southwest winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Lake waters choppy.

FRIDAY
West winds 5 to 10 knots. Lake waters light chop.

FRIDAY NIGHT
Southwest winds 10 to 15 knots, becoming west 5 to 10 knots after midnight. Lake waters choppy.

SATURDAY
West winds 5 to 10 knots. Lake waters light chop.

SATURDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

SUNDAY
Southwest winds 5 to 10 knots. Lake waters light chop.

SUNDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

MONDAY
Southwest winds 5 to 10 knots. Lake waters light chop.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Lake waters light chop.

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GMZ435-202100
Vermilion and West Cote Blanche Bays
308 AM CDT Thu Aug 20 2026

TODAY
West winds 5 to 10 knots, becoming southwest 10 to 15 knots late. Bay waters choppy.

TONIGHT
Southwest winds 10 to 15 knots. Bay waters choppy.

FRIDAY
West winds 5 to 10 knots. Bay waters light chop.

FRIDAY NIGHT
West winds 10 to 15 knots. Bay waters choppy.

SATURDAY
West winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms in the afternoon.

SATURDAY NIGHT
West winds 5 to 10 knots. Bay waters light chop.

SUNDAY
Northwest winds around 5 knots, becoming southwest in the afternoon. Bay waters light chop. A slight chance of showers and thunderstorms in the afternoon.

SUNDAY NIGHT
Southwest winds 5 to 10 knots. Bay waters light chop.

MONDAY
Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms in the afternoon.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Bay waters light chop.

Winds and waves higher in and near thunderstorms.

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GMZ436-202100
Atchafalaya and East Cote Blanche Bays
308 AM CDT Thu Aug 20 2026

TODAY
West winds 5 to 10 knots. Bay waters light chop.

TONIGHT
West winds 5 to 10 knots. Bay waters light chop.

FRIDAY
West winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms in the afternoon.

FRIDAY NIGHT
West winds 5 to 10 knots. Bay waters light chop.

SATURDAY
West winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms.

SATURDAY NIGHT
West winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms in the evening.

SUNDAY
West winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms.

SUNDAY NIGHT
Southwest winds 5 to 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms after midnight.

MONDAY
West winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms in the afternoon.

MONDAY NIGHT
Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the evening.

Winds and waves higher in and near thunderstorms.

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GMZ450-202100
Coastal waters from Cameron LA to High Island TX out 20 NM
308 AM CDT Thu Aug 20 2026

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

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

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

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

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

SATURDAY NIGHT
Southwest winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds.

SUNDAY
West winds 5 to 10 knots, becoming southwest 10 to 15 knots in the afternoon. Seas around 2 feet.

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

MONDAY
Southwest winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 2 feet in the morning, then 1 foot or less.

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

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GMZ452-202100
Coastal waters from Intracoastal City to Cameron LA out 20 NM
308 AM CDT Thu Aug 20 2026

TODAY
Southwest winds around 10 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds.

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

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

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

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

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

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

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

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less.

MONDAY NIGHT
Southwest winds around 10 knots. Seas around 2 feet.

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GMZ455-202100
Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM
308 AM CDT Thu Aug 20 2026

TODAY
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 3 seconds.

TONIGHT
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 3 seconds.

FRIDAY
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds.

FRIDAY NIGHT
West winds around 10 knots. Seas 1 foot or less, then around 2 feet after midnight. Wave Detail: Southwest 1 foot at 3 seconds. A slight chance of showers and thunderstorms after midnight.

SATURDAY
West winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. Wave Detail: West 1 foot at 3 seconds. A chance of showers and thunderstorms, mainly in the morning.

SATURDAY NIGHT
West winds around 10 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 3 seconds.

SUNDAY
West winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms.

SUNDAY NIGHT
Southwest winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms after midnight.

MONDAY
West winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the afternoon.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Seas 1 foot or less.

Winds and seas higher in and near thunderstorms.

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GMZ470-202100
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM
308 AM CDT Thu Aug 20 2026

TODAY
Southwest winds around 10 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds.

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

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

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

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

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

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

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

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less.

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

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GMZ472-202100
Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM
308 AM CDT Thu Aug 20 2026

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

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

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

FRIDAY NIGHT
West winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds.

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

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

SUNDAY
West winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less.

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

MONDAY
West winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight.

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GMZ475-202100
Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM
308 AM CDT Thu Aug 20 2026

TODAY
West winds around 10 knots, diminishing to around 5 knots late this morning and afternoon. Seas around 2 feet this morning, then 1 foot or less. Wave Detail: Southwest 2 feet at 4 seconds, becoming southwest 1 foot at 4 seconds.

TONIGHT
Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 4 seconds.

FRIDAY
West winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet in the afternoon. Wave Detail: West 1 foot at 3 seconds, becoming west 1 foot at 4 seconds.

FRIDAY NIGHT
West winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight.

SATURDAY
West winds 5 to 10 knots. Seas around 2 feet. Wave Detail: West 2 feet at 4 seconds. A chance of showers and thunderstorms, mainly in the morning.

SATURDAY NIGHT
West winds around 10 knots. Seas around 2 feet. Wave Detail: Southwest 1 foot at 5 seconds.

SUNDAY
West winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. A slight chance of showers and thunderstorms in the morning.

SUNDAY NIGHT
West winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms after midnight.

MONDAY
West winds 5 to 10 knots. Seas 1 foot or less.

MONDAY NIGHT
South winds 5 to 10 knots. Seas 1 foot or less.

Winds and seas higher in and near thunderstorms.