National Weather Service Marine Forecast FZUS54 KLCH

FZUS54 KLCH 120809
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
308 AM CDT Sun Jul 12 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.

GMZ400-122100
308 AM CDT Sun Jul 12 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...

Off shore convection will persist through at least Tuesday and maybe beyond as tropical moisture remains trapped underneath a broad area of upper level weakness.

Wind speeds across the marine zones will be consistent ranging from 0 to 10 knots over the next 7 days. Wave heights will remain below 3 to 4 ft due to weak winds across the northern Gulf. Localized wave heights could be higher near stronger thunderstorms.

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GMZ430-122100
Sabine Lake
308 AM CDT Sun Jul 12 2026

TODAY
South winds around 5 knots. Lake waters smooth. A chance of thunderstorms this morning. Showers likely. Thunderstorms likely this afternoon.

TONIGHT
South winds 5 to 10 knots, becoming southwest after midnight. Lake waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

MONDAY
Southwest winds around 5 knots. Lake waters smooth. Showers with thunderstorms likely.

MONDAY NIGHT
Southwest winds around 5 knots in the evening, becoming light and variable. Lake waters smooth. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

TUESDAY
Northwest winds around 5 knots, becoming west in the afternoon. Lake waters smooth. A chance of thunderstorms. Showers.

TUESDAY NIGHT
Southwest winds around 5 knots in the evening, becoming light and variable. Lake waters smooth. A chance of showers with a slight chance of thunderstorms after midnight.

WEDNESDAY
Southwest winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms, mainly in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Lake waters smooth.

THURSDAY
Southeast winds around 5 knots, becoming south in the afternoon. Lake waters light chop. A slight chance of showers and thunderstorms.

THURSDAY NIGHT
South winds 5 to 10 knots. Lake waters light chop.

Winds and waves higher in and near thunderstorms.

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GMZ432-122100
Calcasieu Lake
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds around 5 knots, becoming south this afternoon. Lake waters light chop. Showers likely. A chance of thunderstorms this morning, then thunderstorms likely this afternoon.

TONIGHT
Southwest winds 5 to 10 knots. Lake waters light chop. A chance of thunderstorms. A chance of showers.

MONDAY
West winds around 5 knots. Lake waters smooth. Showers with thunderstorms likely.

MONDAY NIGHT
West winds around 5 knots. Lake waters smooth. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

TUESDAY
West winds around 5 knots. Lake waters smooth. A chance of thunderstorms. Showers, mainly in the morning.

TUESDAY NIGHT
Southwest winds around 5 knots. Lake waters smooth. A chance of showers and thunderstorms after midnight.

WEDNESDAY
Northwest winds around 5 knots, becoming southwest in the afternoon. Lake waters smooth. A chance of showers and thunderstorms, mainly in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Lake waters smooth.

THURSDAY
South winds 5 to 10 knots. Lake waters light chop. A slight chance of showers and thunderstorms.

THURSDAY NIGHT
South winds 5 to 10 knots. Lake waters light chop.

Winds and waves higher in and near thunderstorms.

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GMZ435-122100
Vermilion and West Cote Blanche Bays
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds 5 to 10 knots. Bay waters light chop. A chance of showers and thunderstorms early this morning, then showers with thunderstorms likely late this morning and afternoon.

TONIGHT
Southwest winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

MONDAY
West winds around 5 knots. Bay waters smooth. Thunderstorms likely. Showers.

MONDAY NIGHT
West winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

TUESDAY
West winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. Showers likely, mainly in the morning.

TUESDAY NIGHT
West winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

WEDNESDAY
West winds around 5 knots, becoming southwest in the afternoon. Bay waters smooth. A chance of showers and thunderstorms, mainly in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Bay waters smooth.

THURSDAY
South winds around 5 knots. Bay waters smooth.

THURSDAY NIGHT
South winds around 5 knots. Bay waters smooth.

Winds and waves higher in and near thunderstorms.

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GMZ436-122100
Atchafalaya and East Cote Blanche Bays
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds 5 to 10 knots. Bay waters light chop. Showers likely with a chance of thunderstorms early this morning, then showers and thunderstorms likely late this morning and afternoon.

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

MONDAY
Northwest winds 5 to 10 knots. Bay waters light chop. Thunderstorms likely. Showers.

MONDAY NIGHT
West winds around 5 knots. Bay waters smooth. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

TUESDAY
West winds 5 to 10 knots. Bay waters light chop. A chance of thunderstorms. Showers likely, mainly in the morning.

TUESDAY NIGHT
Southwest winds around 5 knots. Bay waters smooth. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

WEDNESDAY
West winds around 5 knots. Bay waters smooth. A chance of showers and thunderstorms in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Bay waters smooth.

THURSDAY
South winds around 5 knots. Bay waters smooth.

THURSDAY NIGHT
South winds around 5 knots. Bay waters smooth.

Winds and waves higher in and near thunderstorms.

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GMZ450-122100
Coastal waters from Cameron LA to High Island TX out 20 NM
308 AM CDT Sun Jul 12 2026

TODAY
South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 1 foot at 5 seconds. A chance of thunderstorms. Showers likely, mainly this morning.

TONIGHT
Southwest winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of thunderstorms. Showers.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

TUESDAY
Northwest winds 5 to 10 knots, becoming southwest in the afternoon. Seas around 2 feet in the morning, then 1 foot or less. Wave Detail: South 1 foot at 5 seconds. A chance of thunderstorms. Showers, mainly in the morning.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 4 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

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

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

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the morning.

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

Winds and seas higher in and near thunderstorms.

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GMZ452-122100
Coastal waters from Intracoastal City to Cameron LA out 20 NM
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. A chance of thunderstorms. Showers likely, mainly this morning.

TONIGHT
Southwest winds around 10 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

MONDAY
West winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. Thunderstorms likely. Showers.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southwest 1 foot at 3 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

TUESDAY
West winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southwest 1 foot at 4 seconds. A chance of thunderstorms. Showers, mainly in the morning.

TUESDAY NIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet in the evening, then 1 foot or less. Wave Detail: Southwest 2 feet at 4 seconds, becoming south 1 foot at 5 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

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

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

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the morning.

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

Winds and seas higher in and near thunderstorms.

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GMZ455-122100
Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds 5 to 10 knots. Seas around 2 feet this morning, then 1 foot or less. Wave Detail: South 1 foot at 4 seconds, becoming southwest 1 foot at 4 seconds. Showers with a chance of thunderstorms early this morning, then showers and thunderstorms likely late this morning and afternoon.

TONIGHT
Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 3 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

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

MONDAY NIGHT
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

TUESDAY
West winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: West 1 foot at 3 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

TUESDAY NIGHT
Southwest winds around 5 knots. Seas 1 foot or less. Wave Detail: Southwest 1 foot at 2 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

WEDNESDAY
Southwest winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Seas 1 foot or less.

THURSDAY
Southeast winds around 5 knots. Seas 1 foot or less.

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

Winds and seas higher in and near thunderstorms.

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GMZ470-122100
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM
308 AM CDT Sun Jul 12 2026

TODAY
South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. A chance of thunderstorms. Showers likely, mainly this morning.

TONIGHT
South winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

MONDAY NIGHT
South winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

TUESDAY
South winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. Showers likely with a chance of thunderstorms in the morning, then a slight chance of showers and thunderstorms in the afternoon.

TUESDAY NIGHT
South winds around 5 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. A chance of showers and thunderstorms after midnight.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. A chance of showers and thunderstorms, mainly in the morning.

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

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the morning.

THURSDAY NIGHT
Southeast winds around 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

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GMZ472-122100
Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds around 10 knots, becoming 5 to 10 knots late this morning and afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. A chance of thunderstorms.

TONIGHT
Southwest winds around 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A slight chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

MONDAY NIGHT
Southwest winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

TUESDAY
West winds 5 to 10 knots, becoming southwest in the afternoon. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of thunderstorms. Showers, mainly in the morning.

TUESDAY NIGHT
South winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers and thunderstorms after midnight.

WEDNESDAY
South winds around 5 knots. Seas around 2 feet. A chance of showers and thunderstorms, mainly in the morning.

WEDNESDAY NIGHT
Southeast winds 5 to 10 knots. Seas around 2 feet.

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the morning.

THURSDAY NIGHT
South winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

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GMZ475-122100
Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM
308 AM CDT Sun Jul 12 2026

TODAY
Southwest winds around 10 knots, becoming 5 to 10 knots late this morning and afternoon. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds. A chance of thunderstorms this morning. Showers likely. Thunderstorms likely this afternoon.

TONIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of showers and thunderstorms.

MONDAY
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds. A chance of showers and thunderstorms.

MONDAY NIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds and southwest 1 foot at 3 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

TUESDAY
West winds 5 to 10 knots, becoming southwest in the afternoon. Seas around 2 feet. Wave Detail: Southwest 2 feet at 6 seconds. Showers likely with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.

TUESDAY NIGHT
South winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

WEDNESDAY
South winds around 5 knots. Seas around 2 feet. A slight chance of showers and thunderstorms.

WEDNESDAY NIGHT
Southeast winds 5 to 10 knots. Seas around 2 feet.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 to 3 feet.

THURSDAY NIGHT
South winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.