National Weather Service Marine Forecast FZUS54 KLCH

FZUS54 KLCH 200823
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
323 AM CDT Tue May 20 2025

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
323 AM CDT Tue May 20 2025

SYNOPSIS

Winds and wave remain elevated but are expected to slowly decrease after sunrise. Exercise Caution headlines will be in effect through tonight. Overnight a cold front will move across the region bringing isolated showers and a few thunderstorms.

The remainder of the week will bring light onshore flow.

---

GMZ430-202100
Sabine Lake
323 AM CDT Tue May 20 2025

TODAY
South winds 10 to 15 knots. Lake waters choppy.

TONIGHT
Southwest winds 5 to 10 knots, becoming north after midnight. Lake waters light chop.

WEDNESDAY
Northeast winds 5 to 10 knots, becoming southeast in the afternoon. Lake waters light chop.

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

THURSDAY
Southeast winds around 5 knots, increasing to 5 to 10 knots in the afternoon. Lake waters light chop.

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

FRIDAY
East winds 5 to 10 knots, becoming southeast in the afternoon. Lake waters light chop.

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

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

SATURDAY NIGHT
South winds around 10 knots. Lake waters light chop.

---

GMZ432-202100
Calcasieu Lake
323 AM CDT Tue May 20 2025

TODAY
South winds 10 to 15 knots with gusts up to 20 knots. Lake waters choppy.

TONIGHT
Southwest winds 5 to 10 knots, becoming northwest after midnight. Lake waters light chop.

WEDNESDAY
Northeast winds 5 to 10 knots, becoming southeast in the afternoon. Lake waters light chop.

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

THURSDAY
Southeast winds 5 to 10 knots. Lake waters light chop.

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

FRIDAY
East winds 5 to 10 knots, becoming southeast in the afternoon. Lake waters light chop.

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

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

SATURDAY NIGHT
South winds 10 to 15 knots. Lake waters choppy.

---

GMZ435-202100
Vermilion and West Cote Blanche Bays
323 AM CDT Tue May 20 2025

TODAY
South winds 10 to 15 knots with gusts up to 25 knots. Bay waters choppy.

TONIGHT
South winds 5 to 10 knots, becoming west after midnight. Bay waters light chop.

WEDNESDAY
Northeast winds around 5 knots, becoming south in the afternoon. Bay waters smooth. A slight chance of showers and thunderstorms.

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

THURSDAY
South winds around 5 knots. Bay waters smooth.

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

FRIDAY
East winds around 5 knots, becoming south in the afternoon. Bay waters light chop.

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

SATURDAY
South winds 5 to 10 knots. Bay waters light chop.

SATURDAY NIGHT
South winds around 10 knots. Bay waters light chop.

Winds and waves higher in and near thunderstorms.

---

GMZ436-202100
Atchafalaya and East Cote Blanche Bays
323 AM CDT Tue May 20 2025

TODAY
South winds 10 to 15 knots. Gusts up to 25 knots until late afternoon. Bay waters choppy.

TONIGHT
South winds 5 to 10 knots, becoming southwest after midnight. Bay waters light chop.

WEDNESDAY
North winds around 5 knots, becoming southwest in the afternoon. Bay waters smooth. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon.

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.

FRIDAY
East winds around 5 knots, becoming south in the afternoon. Bay waters smooth.

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

SATURDAY
Southeast winds 5 to 10 knots. Bay waters light chop.

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

Winds and waves higher in and near thunderstorms.

---

GMZ450-202100
Coastal waters from Cameron LA to High Island TX out 20 NM
323 AM CDT Tue May 20 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM CDT EARLY THIS MORNING

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 9 AM CDT THIS MORNING

TODAY
South winds 15 to 20 knots with gusts up to 25 knots, diminishing to 10 to 15 knots this afternoon. Seas 2 to 4 feet. Wave Detail: South 4 feet at 6 seconds.

TONIGHT
Southwest winds 5 to 10 knots, becoming northwest after midnight. Seas 2 to 3 feet. Wave Detail: South 3 feet at 7 seconds and southwest 2 feet at 4 seconds.

WEDNESDAY
Northeast winds around 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Northeast 2 feet at 3 seconds and south 2 feet at 7 seconds.

WEDNESDAY NIGHT
South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds and east 1 foot at 3 seconds.

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds and southeast 1 foot at 3 seconds.

THURSDAY NIGHT
South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds and southeast 1 foot at 3 seconds.

FRIDAY
Southeast winds 5 to 10 knots. Seas around 2 feet.

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

SATURDAY
South winds 10 to 15 knots. Seas around 2 feet.

SATURDAY NIGHT
Southeast winds around 15 knots. Seas 2 to 4 feet.

---

GMZ452-202100
Coastal waters from Intracoastal City to Cameron LA out 20 NM
323 AM CDT Tue May 20 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM CDT EARLY THIS MORNING

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 9 AM CDT THIS MORNING

TODAY
South winds 15 to 20 knots with gusts up to 25 knots, diminishing to 10 to 15 knots with gusts up to 20 knots this afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: South 5 feet at 6 seconds.

TONIGHT
South winds around 10 knots, becoming west after midnight. Seas 2 to 3 feet. Wave Detail: South 3 feet at 7 seconds.

WEDNESDAY
Northeast winds around 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at 7 seconds and north 1 foot at 3 seconds. A slight chance of showers and thunderstorms in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds.

THURSDAY
South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds.

THURSDAY NIGHT
South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds.

FRIDAY
East winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet.

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

SATURDAY
Southeast winds 10 to 15 knots. Seas around 2 feet.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

---

GMZ455-202100
Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM
323 AM CDT Tue May 20 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM CDT EARLY THIS MORNING

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 9 AM CDT THIS MORNING

TODAY
South winds 15 to 20 knots with gusts up to 25 knots, diminishing to 10 to 15 knots with gusts up to 20 knots this afternoon. Seas 2 to 4 feet. Wave Detail: South 3 feet at 6 seconds and south 2 feet at 2 seconds.

TONIGHT
Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: South 2 feet at 7 seconds.

WEDNESDAY
North winds around 5 knots, becoming south in the afternoon. Seas 1 to 2 feet. Wave Detail: South 2 feet at 7 seconds. A slight chance of showers and thunderstorms.

WEDNESDAY NIGHT
South winds around 5 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 7 seconds.

THURSDAY
South winds around 5 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 6 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon.

THURSDAY NIGHT
South winds around 5 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 6 seconds.

FRIDAY
East winds 5 to 10 knots, becoming southeast in the afternoon. Seas 1 foot or less.

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

SATURDAY
Southeast winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet in the afternoon.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

---

GMZ470-202100
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM
323 AM CDT Tue May 20 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM CDT EARLY THIS MORNING

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 9 AM CDT THIS MORNING

TODAY
South winds 15 to 20 knots with gusts up to 25 knots, diminishing to 10 to 15 knots with gusts up to 20 knots late this morning and afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: South 5 feet at 7 seconds.

TONIGHT
South winds 5 to 10 knots, becoming west after midnight. Seas 2 to 4 feet. Wave Detail: South 4 feet at 7 seconds.

WEDNESDAY
Northeast winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds and north 1 foot at 3 seconds.

WEDNESDAY NIGHT
Southeast winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds and northeast 1 foot at 3 seconds.

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.

THURSDAY NIGHT
Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.

FRIDAY
Southeast winds 5 to 10 knots. Seas around 2 feet.

FRIDAY NIGHT
Southeast winds around 10 knots. Seas around 2 feet.

SATURDAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

SATURDAY NIGHT
Southeast winds around 15 knots. Seas 3 to 4 feet.

---

GMZ472-202100
Coastal waters from Intracoastal City to Cameron LA from 20 to 60 NM
323 AM CDT Tue May 20 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM CDT EARLY THIS MORNING

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 9 AM CDT THIS MORNING

TODAY
South winds 15 to 20 knots with gusts up to 25 knots, diminishing to 10 to 15 knots with gusts up to 20 knots this afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 6 feet at 7 seconds.

TONIGHT
South winds around 10 knots, becoming southwest after midnight. Seas 3 to 4 feet. Wave Detail: South 4 feet at 7 seconds.

WEDNESDAY
Northeast winds 5 to 10 knots, becoming southeast in the afternoon. Seas 3 to 4 feet. Wave Detail: South 4 feet at 7 seconds.

WEDNESDAY NIGHT
South winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds.

THURSDAY
Southeast winds around 5 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.

THURSDAY NIGHT
Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.

FRIDAY
Southeast winds 5 to 10 knots. Seas around 2 feet.

FRIDAY NIGHT
Southeast winds around 10 knots. Seas around 2 feet.

SATURDAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

---

GMZ475-202100
Coastal waters from Lower Atchafalaya River to Intracoastal City LA from 20 to 60 NM
323 AM CDT Tue May 20 2025

SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM CDT EARLY THIS MORNING

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 9 AM CDT THIS MORNING

TODAY
South winds 15 to 20 knots, diminishing to 10 to 15 knots this afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 6 feet at 7 seconds.

TONIGHT
South winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: South 4 feet at 7 seconds.

WEDNESDAY
South winds around 5 knots. Seas 2 to 4 feet. Wave Detail: South 4 feet at 7 seconds. A slight chance of showers in the morning.

WEDNESDAY NIGHT
South winds around 5 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds.

THURSDAY
Southeast winds around 5 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 7 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon.

THURSDAY NIGHT
Southeast winds around 5 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.

FRIDAY
Southeast winds 5 to 10 knots. Seas around 2 feet.

FRIDAY NIGHT
Southeast winds around 10 knots. Seas around 2 feet.

SATURDAY
Southeast winds around 10 knots. Seas around 2 feet.

SATURDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.