556
FZUS54 KLCH 180809
CWFLCH
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE LAKE CHARLES LA
308 AM CDT TUE AUG 18 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.
GMZ400-182100-
308 AM CDT TUE AUG 18 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 HIGH PRESSURE OVER THE NORTHWEST GULF WILL KEEP WINDS
LIGHT OUT OF THE SOUTHWEST THROUGH THE FORECAST PERIOD, GENERALLY
NO MORE THAN 5-12 KT, WITH SEAS AROUND 1-2 FT. HIGH PRESSURE ALOFT
WILL KEEP RAIN CHANCES NEAR ZERO THROUGH MUCH OF THE WEEK. SOME
ISOLATED SHOWER ACTIVITY MAY RETURN BY THIS WEEKEND, WITH GREATER
CHANCES FURTHER EAST.
GMZ430-182100-
SABINE LAKE-
308 AM CDT TUE AUG 18 2026
TODAY
SOUTHWEST WINDS AROUND 5 KNOTS, BECOMING SOUTH LATE.
LAKE WATERS LIGHT CHOP.
TONIGHT
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.
THURSDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT
CHOP.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS
LIGHT CHOP.
FRIDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT CHOP.
FRIDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT
CHOP.
SATURDAY
WEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT CHOP.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS
LIGHT CHOP.
GMZ432-182100-
CALCASIEU LAKE-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST LATE. LAKE
WATERS LIGHT CHOP.
TONIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT CHOP.
WEDNESDAY
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST 10 TO
15 KNOTS WITH GUSTS UP TO 20 KNOTS IN THE AFTERNOON. LAKE WATERS
CHOPPY.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS WITH GUSTS UP
TO 20 KNOTS, DIMINISHING TO 5 TO 10 KNOTS AFTER MIDNIGHT. LAKE
WATERS CHOPPY.
THURSDAY
SOUTHWEST WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO
15 KNOTS IN THE AFTERNOON. LAKE WATERS CHOPPY.
THURSDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS, DIMINISHING TO
5 TO 10 KNOTS AFTER MIDNIGHT. LAKE WATERS CHOPPY.
FRIDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT CHOP.
FRIDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT
CHOP.
SATURDAY
WEST WINDS 5 TO 10 KNOTS. LAKE WATERS LIGHT CHOP. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. LAKE WATERS
LIGHT CHOP.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
GMZ435-182100-
VERMILION AND WEST COTE BLANCHE BAYS-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST LATE. BAY
WATERS LIGHT CHOP.
TONIGHT
SOUTHWEST WINDS AROUND 10 KNOTS. BAY WATERS LIGHT
CHOP.
WEDNESDAY
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST 10 TO
15 KNOTS IN THE AFTERNOON. BAY WATERS CHOPPY.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. BAY WATERS
CHOPPY.
THURSDAY
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST 10 TO
15 KNOTS IN THE AFTERNOON. BAY WATERS CHOPPY.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT
CHOP.
FRIDAY
WEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT CHOP.
FRIDAY NIGHT
SOUTHWEST 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.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
GMZ436-182100-
ATCHAFALAYA AND EAST COTE BLANCHE BAYS-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT CHOP.
TONIGHT
WEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT CHOP.
WEDNESDAY
WEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT CHOP.
WEDNESDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. BAY WATERS
LIGHT CHOP.
THURSDAY
WEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT CHOP.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT
CHOP.
FRIDAY
WEST WINDS 5 TO 10 KNOTS. BAY WATERS LIGHT CHOP.
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.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
GMZ450-182100-
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM-
308 AM CDT TUE AUG 18 2026
TODAY
SOUTHWEST WINDS 5 TO 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 3 SECONDS.
WEDNESDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
THURSDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
THURSDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
FRIDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET.
SATURDAY
WEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET.
GMZ452-182100-
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET THIS
MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: SOUTHWEST 1 FOOT AT
3 SECONDS, BECOMING SOUTHWEST 1 FOOT AT 4 SECONDS.
TONIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 3 SECONDS.
WEDNESDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
THURSDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
THURSDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
FRIDAY
WEST WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO 15 KNOTS
IN THE AFTERNOON. SEAS AROUND 2 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET.
SATURDAY
WEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
GMZ455-182100-
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS. WAVE
DETAIL: WEST 1 FOOT AT 3 SECONDS.
TONIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS.
WAVE DETAIL: WEST 1 FOOT AT 3 SECONDS.
WEDNESDAY
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS. WAVE
DETAIL: WEST 1 FOOT AT 3 SECONDS.
WEDNESDAY NIGHT
SOUTHWEST WINDS AROUND 10 KNOTS. SEAS 1 FOOT
OR LESS, THEN AROUND 2 FEET AFTER MIDNIGHT. WAVE DETAIL: WEST
1 FOOT AT 3 SECONDS, BECOMING SOUTHWEST 1 FOOT AT 3 SECONDS.
THURSDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET IN THE
MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: WEST 1 FOOT AT
2 SECONDS.
THURSDAY NIGHT
SOUTHWEST 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.
FRIDAY NIGHT
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS.
SATURDAY
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
GMZ470-182100-
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX FROM 20 TO 60 NM-
308 AM CDT TUE AUG 18 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 AND SOUTHEAST 1 FOOT AT 8 SECONDS, BECOMING SOUTHWEST
1 FOOT AT 4 SECONDS AND SOUTHEAST 1 FOOT AT 8 SECONDS.
TONIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 3 SECONDS AND SOUTHEAST 1 FOOT
AT 8 SECONDS.
WEDNESDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS AND SOUTHEAST 1 FOOT
AT 7 SECONDS.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS.
THURSDAY
SOUTHWEST WINDS 10 TO 15 KNOTS, DIMINISHING TO 5 TO
10 KNOTS IN THE AFTERNOON. SEAS AROUND 2 FEET. WAVE DETAIL:
SOUTHWEST 2 FEET AT 4 SECONDS AND SOUTHEAST 1 FOOT AT 8 SECONDS.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS, INCREASING TO
10 TO 15 KNOTS AFTER MIDNIGHT. SEAS AROUND 2 FEET. WAVE DETAIL:
SOUTH 2 FEET AT 4 SECONDS AND SOUTHEAST 1 FOOT AT 7 SECONDS.
FRIDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS, INCREASING TO
10 TO 15 KNOTS AFTER MIDNIGHT. SEAS AROUND 2 FEET.
SATURDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND
2 FEET.
GMZ472-182100-
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA FROM 20 TO
60 NM-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS. WAVE
DETAIL: SOUTHWEST 1 FOOT AT 4 SECONDS AND SOUTHEAST 1 FOOT AT
9 SECONDS.
TONIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 3 SECONDS AND SOUTHEAST 1 FOOT
AT 8 SECONDS.
WEDNESDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS AND SOUTHEAST 1 FOOT
AT 7 SECONDS.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS AND SOUTHEAST
1 FOOT AT 8 SECONDS.
THURSDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS AND SOUTHEAST 1 FOOT
AT 8 SECONDS.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND
2 FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 4 SECONDS AND SOUTHEAST
1 FOOT AT 7 SECONDS.
FRIDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND
2 FEET.
SATURDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND
2 FEET.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
GMZ475-182100-
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA FROM 20 TO 60 NM-
308 AM CDT TUE AUG 18 2026
TODAY
WEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS. WAVE
DETAIL: WEST 1 FOOT AT 3 SECONDS AND SOUTHEAST 1 FOOT AT
9 SECONDS.
TONIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS,
THEN AROUND 2 FEET AFTER MIDNIGHT. WAVE DETAIL: WEST 1 FOOT AT
3 SECONDS AND SOUTHEAST 1 FOOT AT 8 SECONDS, BECOMING WEST 1 FOOT
AT 3 SECONDS AND SOUTHEAST 1 FOOT AT 7 SECONDS.
WEDNESDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET. WAVE
DETAIL: WEST 2 FEET AT 3 SECONDS.
WEDNESDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR
LESS, THEN AROUND 2 FEET AFTER MIDNIGHT. WAVE DETAIL: WEST 1 FOOT
AT 3 SECONDS.
THURSDAY
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.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR
LESS, THEN AROUND 2 FEET AFTER MIDNIGHT. WAVE DETAIL: WEST 1 FOOT
AT 4 SECONDS, BECOMING SOUTHWEST 1 FOOT AT 4 SECONDS.
FRIDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET IN THE
MORNING, THEN 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
SATURDAY
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
WEST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
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