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FZUS54 KLCH 100809
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Coastal Waters Forecast
National Weather Service Lake Charles LA
308 AM 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.

GMZ400-102100-
308 AM 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...

Mainly light south to southeasterly winds with low seas are expected
to continue into at least the middle of this week as a surface high
pressure system ridge develops across the northern Gulf. Daily
chance for showers and thunderstorms through Tues as a weak coastal
trough skirts along the northern Gulf waters. The best chance of
seeing activity is favored closer to shore during the afternoon
hours. Dry conditions return Wednesday and beyond.

$$

GMZ430-102100-
Sabine Lake-
308 AM CDT Mon Aug 10 2026

.TODAY...Southeast winds around 5 knots, becoming south this
afternoon. Lake waters light chop. A chance of thunderstorms.
Showers, mainly this morning.
.TONIGHT...South winds 5 to 10 knots. Lake waters light chop.
.TUESDAY...South winds around 5 knots, increasing to 5 to
10 knots in the afternoon. Lake waters light chop. A slight
chance of showers and thunderstorms in the morning.
.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 in the afternoon. Lake waters choppy.
.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. Lake waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-102100-
Calcasieu Lake-
308 AM CDT Mon Aug 10 2026

.TODAY...Southeast winds 5 to 10 knots. Lake waters light chop. A
chance of thunderstorms. Showers likely until late afternoon,
then a slight chance of showers late.
.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 morning.
.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, becoming southwest
5 to 10 knots after midnight. Lake waters choppy.
.THURSDAY...Southwest winds 5 to 10 knots, becoming south 10 to
15 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. Lake waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-102100-
Vermilion and West Cote Blanche Bays-
308 AM CDT Mon Aug 10 2026

.TODAY...Southeast winds 5 to 10 knots. Bay waters light chop.
Showers likely this morning. A chance of thunderstorms. A chance
of showers this afternoon.
.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. A slight chance
of showers and thunderstorms in the morning.
.TUESDAY NIGHT...South winds 5 to 10 knots. Bay waters light
chop.
.WEDNESDAY...Southwest winds 5 to 10 knots. Bay waters light
chop.
.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. Bay waters light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-102100-
Atchafalaya and East Cote Blanche Bays-
308 AM CDT Mon Aug 10 2026

.TODAY...South winds around 5 knots. Bay waters smooth. A chance
of showers and thunderstorms until late afternoon, then a slight
chance of showers and thunderstorms late.
.TONIGHT...South winds around 5 knots. Bay waters smooth.
.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 5 to 10 knots, becoming southwest
after midnight. Bay waters light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-102100-
Coastal waters from Cameron LA to High Island TX out 20 NM-
308 AM CDT Mon Aug 10 2026

.TODAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A chance of thunderstorms.
.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 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 around 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.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...South winds 10 to 15 knots. Seas around 2 feet.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-102100-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
308 AM CDT Mon Aug 10 2026

.TODAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A chance of showers and
thunderstorms.
.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. A slight chance of showers and
thunderstorms in the morning.
.TUESDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 3 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: South 2 feet at 4 seconds.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.
.FRIDAY...South winds 5 to 10 knots. Seas around 2 feet.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-102100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
308 AM CDT Mon Aug 10 2026

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

Winds and seas higher in and near thunderstorms.

$$

GMZ470-102100-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
308 AM CDT Mon Aug 10 2026

.TODAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds. A chance of showers and
thunderstorms.
.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.TUESDAY...South winds 5 to 10 knots. 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: Southeast 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 3 feet at
6 seconds.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...South winds around 10 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-102100-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
308 AM CDT Mon Aug 10 2026

.TODAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A chance of showers. A chance
of thunderstorms until late afternoon, then a slight chance of
thunderstorms late.
.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A chance of showers in the
evening.
.TUESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A slight chance of showers and
thunderstorms in the morning.
.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 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.
.THURSDAY NIGHT...South winds 10 to 15 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 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-102100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
308 AM CDT Mon Aug 10 2026

.TODAY...South winds 5 to 10 knots. Seas around 2 feet this
morning, then 1 foot or less. Wave Detail: South 2 feet at
4 seconds, becoming south 1 foot at 4 seconds. A chance of
showers and thunderstorms this morning, then a slight chance of
showers and thunderstorms early this afternoon.
.TONIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 4 seconds.
.TUESDAY...Southeast winds around 5 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southeast
1 foot at 5 seconds, becoming southeast 2 feet at 5 seconds. A
slight chance of showers and thunderstorms in the morning.
.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: Southeast 2 feet at 6 seconds. A slight chance of showers
and thunderstorms in the morning.
.WEDNESDAY NIGHT...South winds 5 to 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.
.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.

Winds and seas higher in and near thunderstorms.

$$