National Weather Service Marine Forecast FZUS54 KLCH

FZUS54 KLCH 212009
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
309 PM CDT Fri Aug 21 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.

GMZ400-220900
309 PM CDT Fri Aug 21 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...

Surface ridging extending over the entire Gulf will keep conditions over the waters mostly clear of rain chances and with low, onshore winds and seas.

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GMZ430-220900
Sabine Lake
309 PM CDT Fri Aug 21 2026

TONIGHT
Southwest winds 10 to 15 knots, becoming west late. Lake waters choppy. A slight chance of showers and thunderstorms early this evening, then a chance of thunderstorms with a slight chance of showers late this evening.

SATURDAY
West winds 5 to 10 knots, becoming southwest 20 to 25 knots with gusts up to 30 knots in the afternoon. Lake waters very rough.

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.

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

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

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

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

Winds and waves higher in and near thunderstorms.

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GMZ432-220900
Calcasieu Lake
309 PM CDT Fri Aug 21 2026

TONIGHT
Southwest winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight, then becoming west late. Lake waters choppy. A chance of showers and thunderstorms this evening.

SATURDAY
West winds 5 to 10 knots, increasing to 20 to 25 knots with gusts up to 30 knots in the afternoon. Lake waters very rough.

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. A slight chance of showers and thunderstorms in the afternoon.

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.

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

TUESDAY NIGHT
Southwest winds around 10 knots. Lake waters light chop.

WEDNESDAY
Southwest winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms in the afternoon.

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

Winds and waves higher in and near thunderstorms.

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GMZ435-220900
Vermilion and West Cote Blanche Bays
309 PM CDT Fri Aug 21 2026

TONIGHT
West winds 20 to 25 knots with gusts up to 30 knots, becoming east 10 to 15 knots late this evening, then becoming south around 5 knots after midnight, becoming west 10 to 15 knots late. Bay waters very rough. A chance of showers and thunderstorms this evening.

SATURDAY
Northwest winds 10 to 15 knots with gusts up to 20 knots, becoming southwest 20 to 25 knots with gusts up to 30 knots in the afternoon. Bay waters very rough.

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

SUNDAY
Northwest winds 5 to 10 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 slight chance of showers and thunderstorms in the afternoon.

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

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

TUESDAY NIGHT
Southwest winds around 10 knots. Bay waters light chop.

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

WEDNESDAY NIGHT
Southwest winds around 10 knots. Bay waters light chop. A slight chance of showers and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

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GMZ436-220900
Atchafalaya and East Cote Blanche Bays
309 PM CDT Fri Aug 21 2026

TONIGHT
West winds 15 to 20 knots, becoming northeast with gusts up to 30 knots late this evening, then becoming southwest 10 to 15 knots with gusts up to 20 knots after midnight, becoming west with gusts up to 20 knots late. Bay waters rough. A chance of showers and thunderstorms this evening.

SATURDAY
Northwest winds 10 to 15 knots, becoming west 25 to 30 knots in the afternoon. Bay waters extremely rough.

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

SUNDAY
Northwest winds 5 to 10 knots, becoming west in the afternoon. Bay waters light chop. A chance of showers and thunderstorms in the afternoon.

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

MONDAY
West winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the afternoon.

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

TUESDAY
Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms.

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

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

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

Winds and waves higher in and near thunderstorms.

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GMZ450-220900
Coastal waters from Cameron LA to High Island TX out 20 NM
309 PM CDT Fri Aug 21 2026

TONIGHT
Southwest winds 15 to 20 knots, diminishing to 10 to 15 knots late this evening and overnight. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds. A slight chance of showers and thunderstorms this evening.

SATURDAY
West winds 10 to 15 knots, becoming southwest 15 to 20 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds.

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

SUNDAY
West winds 5 to 10 knots, becoming southwest in the afternoon. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds.

SUNDAY NIGHT
Southwest winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 3 seconds.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. Wave Detail: Southwest 2 feet at 4 seconds, becoming southwest 1 foot at 4 seconds.

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

TUESDAY
Southwest winds 10 to 15 knots. Seas around 2 feet.

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

WEDNESDAY
Southwest winds 10 to 15 knots. Seas around 2 feet.

WEDNESDAY NIGHT
Southwest winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

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GMZ452-220900
Coastal waters from Intracoastal City to Cameron LA out 20 NM
309 PM CDT Fri Aug 21 2026

TONIGHT
Southwest winds around 15 knots with gusts up to 20 knots, increasing to 20 to 25 knots with gusts up to 30 knots late this evening, then diminishing to 15 to 20 knots after midnight, becoming west 10 to 15 knots late. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds. A chance of showers and thunderstorms early this evening, then a chance of thunderstorms with a slight chance of showers late this evening.

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

SATURDAY NIGHT
West 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. Wave Detail: West 2 feet at 4 seconds.

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

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. Wave Detail: Southwest 2 feet at 4 seconds, becoming southwest 1 foot at 4 seconds.

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

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

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

WEDNESDAY
Southwest winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 2 feet.

WEDNESDAY NIGHT
Southwest winds 10 to 15 knots. Seas around 2 feet. A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

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GMZ455-220900
Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM
309 PM CDT Fri Aug 21 2026

TONIGHT
West winds 15 to 20 knots, becoming northwest 20 to 25 knots with gusts up to 30 knots late this evening, then becoming southwest 10 to 15 knots with gusts up to 20 knots after midnight, becoming west with gusts up to 20 knots late. Seas 1 to 2 feet. Wave Detail: West 1 foot at 3 seconds. A chance of showers and thunderstorms this evening.

SATURDAY
West winds 10 to 15 knots, becoming southwest 20 to 25 knots with gusts up to 30 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: West 1 foot at 3 seconds.

SATURDAY NIGHT
West winds 10 to 15 knots. Seas around 2 feet. Wave Detail: West 1 foot at 3 seconds.

SUNDAY
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds. A slight chance of showers and thunderstorms.

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

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

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

TUESDAY
Southwest winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Seas 1 foot or less. A slight chance of showers and thunderstorms in the afternoon.

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

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

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

Winds and seas higher in and near thunderstorms.

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GMZ470-220900
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM
309 PM CDT Fri Aug 21 2026

TONIGHT
Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds. A slight chance of showers and thunderstorms late this evening.

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

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

SUNDAY
West winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. Wave Detail: South 2 feet at 5 seconds, becoming southwest 1 foot at 5 seconds.

SUNDAY NIGHT
Southwest winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight. Wave Detail: Southwest 1 foot at 4 seconds, becoming south 2 feet at 4 seconds.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet in the morning, then 1 foot or less. Wave Detail: South 2 feet at 5 seconds, becoming south 1 foot at 5 seconds.

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

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

TUESDAY NIGHT
South winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas around 2 feet.

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

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

Winds and seas higher in and near thunderstorms.

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GMZ472-220900
Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM
309 PM CDT Fri Aug 21 2026

TONIGHT
Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds. A slight chance of showers and thunderstorms late this evening.

SATURDAY
West winds 10 to 15 knots, increasing to 25 to 30 knots with gusts up to 40 knots in the afternoon. Seas around 2 feet. Wave Detail: West 2 feet at 4 seconds.

SATURDAY NIGHT
West winds around 10 knots. Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds.

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

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

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

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

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

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

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

WEDNESDAY NIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

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GMZ475-220900
Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM
309 PM CDT Fri Aug 21 2026

TONIGHT
West winds 10 to 15 knots, increasing to 15 to 20 knots with gusts up to 25 knots late this evening, then becoming southwest with gusts up to 30 knots after midnight, becoming west 10 to 15 knots with gusts up to 20 knots late. Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds. A slight chance of showers and thunderstorms this evening.

SATURDAY
West winds 10 to 15 knots, becoming southwest 20 to 25 knots with gusts up to 35 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds. A slight chance of showers and thunderstorms.

SATURDAY NIGHT
West winds around 10 knots. Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds.

SUNDAY
Northwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: West 2 feet at 4 seconds. A slight chance of showers and thunderstorms.

SUNDAY NIGHT
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 4 seconds.

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

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

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

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

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

WEDNESDAY NIGHT
South winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight. A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.