439
FZUS54 KLCH 102009
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
309 PM CDT Mon Aug 10 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.

GMZ400-110900-
309 PM CDT Mon Aug 10 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 centered over the Southeast CONUS is resulting
in generally light (5-12 kt) southerly winds, along with scattered
showers and thunderstorms. An upper level ridge building into the
area will bring a decrease in shower activity, with rain chances
near zero from Wednesday onward.

$$

GMZ430-110900-
Sabine Lake-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 5 to 10 knots. Lake waters light chop.
.TUESDAY...South winds 5 to 10 knots. Lake waters light chop. A
slight chance of showers and thunderstorms.
.TUESDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY...South winds 5 to 10 knots. Lake waters light chop.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.THURSDAY...South winds 5 to 10 knots. Lake waters light chop.
.THURSDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.FRIDAY...South winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...South winds 5 to 10 knots, diminishing to around
5 knots after midnight. Lake waters light chop.
.SATURDAY...Southwest winds around 5 knots, becoming south in the
afternoon. Lake waters light chop.
.SATURDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Lake waters light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-110900-
Calcasieu Lake-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 5 to 10 knots. Lake waters light chop.
.TUESDAY...South winds 5 to 10 knots. Lake waters light chop. A
slight chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY...Southwest winds 5 to 10 knots, becoming south 10 to
15 knots with gusts up to 20 knots in the afternoon. Lake waters
choppy.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Lake waters
choppy.
.THURSDAY...Southwest winds 5 to 10 knots, becoming south 10 to
15 knots with gusts up to 20 knots in the afternoon. Lake waters
choppy.
.THURSDAY NIGHT...South winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Lake waters choppy.
.FRIDAY...South winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...South winds 5 to 10 knots, diminishing to around
5 knots after midnight. Lake waters light chop.
.SATURDAY...Southwest winds around 5 knots, becoming south in the
afternoon. Lake waters light chop.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-110900-
Vermilion and West Cote Blanche Bays-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 5 to 10 knots. Bay waters light chop.
.TUESDAY...South winds around 5 knots, increasing to 5 to
10 knots in the afternoon. Bay waters light chop.
.TUESDAY NIGHT...South 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 around 10 knots. Bay waters
light chop.
.THURSDAY...Southwest winds 5 to 10 knots. Bay waters light chop.
.THURSDAY NIGHT...South winds 5 to 10 knots. Bay waters light
chop.
.FRIDAY...South winds 5 to 10 knots. Bay waters light chop.
.FRIDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Bay waters light chop.
.SATURDAY...West winds around 5 knots, becoming south in the
afternoon. Bay waters light chop.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-110900-
Atchafalaya and East Cote Blanche Bays-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 5 to 10 knots, diminishing to around
5 knots late. Bay waters light chop.
.TUESDAY...Southeast winds around 5 knots, becoming south in the
afternoon. Bay waters light chop. A slight chance of showers and
thunderstorms.
.TUESDAY NIGHT...South 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 in the
morning.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters
light chop.
.THURSDAY...Southwest winds 5 to 10 knots. Bay waters light chop.
.THURSDAY NIGHT...South winds 5 to 10 knots. Bay waters light
chop.
.FRIDAY...South winds around 5 knots, increasing to 5 to 10 knots
in the afternoon. Bay waters light chop.
.FRIDAY NIGHT...South winds around 5 knots. Bay waters smooth.
.SATURDAY...Southwest winds around 5 knots. Bay waters smooth.
.SATURDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-110900-
Coastal waters from Cameron LA to High Island TX out 20 NM-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY...South winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Seas around 2 feet. Wave Detail: South
2 feet at 4 seconds.
.TUESDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.WEDNESDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 3 feet at 4 seconds.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 5 seconds.
.THURSDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.
.SATURDAY...South winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.

$$

GMZ452-110900-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.WEDNESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southwest 2 feet at 4 seconds.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...South winds 5 to 10 knots. Seas around 2 feet.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY...South winds around 5 knots, increasing to 5 to
10 knots in the afternoon. Seas around 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet.

$$

GMZ455-110900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: South 1 foot at 3 seconds.
.TUESDAY...South winds around 5 knots. Seas 1 foot or less. Wave
Detail: South 1 foot at 4 seconds. A slight chance of showers and
thunderstorms in the morning.
.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: South 1 foot at
3 seconds.
.WEDNESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less. Wave Detail: Southwest 1 foot
at 3 seconds. A slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight. Wave Detail: Southwest
1 foot at 3 seconds, becoming south 2 feet at 3 seconds.
.THURSDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less. Wave Detail: Southwest 1 foot
at 4 seconds, becoming south 1 foot at 4 seconds.
.THURSDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.FRIDAY...South winds 5 to 10 knots. Seas 1 to 2 feet in the
morning, then 1 foot or less.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
.SATURDAY...Southwest winds around 5 knots. Seas 1 foot or less.
.SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-110900-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.WEDNESDAY...South winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at
5 seconds.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds.
.THURSDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet.
.FRIDAY...South winds around 10 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet.
.SATURDAY...South winds 5 to 10 knots. Seas 2 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.

$$

GMZ472-110900-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
309 PM CDT Mon Aug 10 2026

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.WEDNESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 5 seconds.
.THURSDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 6 seconds.
.THURSDAY NIGHT...South winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet.
.FRIDAY...South winds 5 to 10 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY...Southeast winds around 5 knots. Seas around 2 feet.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.

$$

GMZ475-110900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
309 PM CDT Mon Aug 10 2026

.TONIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: Southeast 1 foot
at 4 seconds, becoming southeast 2 feet at 4 seconds.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southeast
1 foot at 4 seconds, becoming southeast 2 feet at 5 seconds. A
slight chance of showers and thunderstorms.
.TUESDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.WEDNESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 6 seconds. A slight chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...South winds around 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds.
.THURSDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...South winds 5 to 10 knots. Seas around 2 feet.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY...Southeast winds around 5 knots. Seas around 2 feet.
.SATURDAY NIGHT...South winds around 5 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$