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Coastal Waters Forecast
National Weather Service Lake Charles LA
308 AM CDT Thu Aug 20 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.

GMZ400-202100-
308 AM CDT Thu Aug 20 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...

High pressure continues to dominate our weather pattern. Winds
will remain light and mainly onshore with winds speeds between 5
and 15 knots. Waves will remain below 3 feet for the next several
days.

$$

GMZ430-202100-
Sabine Lake-
308 AM CDT Thu Aug 20 2026

.TODAY...Southwest winds 5 to 10 knots, becoming south late. Lake
waters light chop.
.TONIGHT...Southwest winds 5 to 10 knots. Lake waters light chop.
.FRIDAY...West winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.SATURDAY...Southwest winds 5 to 10 knots. Lake waters light
chop.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop.
.SUNDAY...West winds around 5 knots, becoming southwest in the
afternoon. Lake waters light chop.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.

$$

GMZ432-202100-
Calcasieu Lake-
308 AM CDT Thu Aug 20 2026

.TODAY...Southwest winds 5 to 10 knots, increasing to 10 to
15 knots late. Lake waters choppy.
.TONIGHT...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Lake waters choppy.
.FRIDAY...West winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots, becoming west
5 to 10 knots after midnight. Lake waters choppy.
.SATURDAY...West winds 5 to 10 knots. Lake waters light chop.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop.
.SUNDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.

$$

GMZ435-202100-
Vermilion and West Cote Blanche Bays-
308 AM CDT Thu Aug 20 2026

.TODAY...West winds 5 to 10 knots, becoming southwest 10 to
15 knots late. Bay waters choppy.
.TONIGHT...Southwest winds 10 to 15 knots. Bay waters choppy.
.FRIDAY...West winds 5 to 10 knots. Bay waters light chop.
.FRIDAY NIGHT...West winds 10 to 15 knots. Bay waters choppy.
.SATURDAY...West winds 5 to 10 knots. Bay waters light chop. A
slight chance of showers and thunderstorms in the afternoon.
.SATURDAY NIGHT...West winds 5 to 10 knots. Bay waters light
chop.
.SUNDAY...Northwest winds around 5 knots, becoming southwest in
the afternoon. Bay waters light chop. A slight chance of showers
and thunderstorms in the afternoon.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop.
.MONDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-202100-
Atchafalaya and East Cote Blanche Bays-
308 AM CDT Thu Aug 20 2026

.TODAY...West winds 5 to 10 knots. Bay waters light chop.
.TONIGHT...West winds 5 to 10 knots. Bay waters light chop.
.FRIDAY...West winds 5 to 10 knots. Bay waters light chop. A
slight chance of showers and thunderstorms in the afternoon.
.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. A slight chance of showers and thunderstorms in the
evening.
.SUNDAY...West winds 5 to 10 knots. Bay waters light chop. A
slight chance of showers and thunderstorms.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop. A slight chance of showers and thunderstorms after
midnight.
.MONDAY...West winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth. A slight chance of showers and thunderstorms in the
evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-202100-
Coastal waters from Cameron LA to High Island TX out 20 NM-
308 AM CDT Thu Aug 20 2026

.TODAY...Southwest winds 10 to 15 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 4 seconds.
.FRIDAY...West winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet. Wave Detail: Southwest 2 feet at 4 seconds.
.SATURDAY...Southwest winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 4 seconds.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds.
.SUNDAY...West winds 5 to 10 knots, becoming southwest 10 to
15 knots in the afternoon. Seas around 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet.
.MONDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas around 2 feet in the morning,
then 1 foot or less.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.

$$

GMZ452-202100-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
308 AM CDT Thu Aug 20 2026

.TODAY...Southwest winds around 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 4 seconds.
.FRIDAY...West winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.FRIDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 4 seconds.
.SATURDAY...West winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet. Wave Detail: Southwest 2 feet at 4 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas around 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet.
.MONDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less.
.MONDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet.

$$

GMZ455-202100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
308 AM CDT Thu Aug 20 2026

.TODAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Southwest 1 foot at 3 seconds.
.TONIGHT...West 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. Wave
Detail: West 1 foot at 3 seconds.
.FRIDAY NIGHT...West winds around 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: Southwest 1 foot
at 3 seconds. A slight chance of showers and thunderstorms after
midnight.
.SATURDAY...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. A chance of showers and thunderstorms, mainly in the
morning.
.SATURDAY NIGHT...West winds around 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 3 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas 1 foot or less. A slight
chance of showers and thunderstorms.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. A slight chance of showers and thunderstorms after
midnight.
.MONDAY...West winds 5 to 10 knots. Seas 1 foot or less. A slight
chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-202100-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
308 AM CDT Thu Aug 20 2026

.TODAY...Southwest winds around 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 4 seconds.
.FRIDAY...West winds around 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds.
.SATURDAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas around 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet.
.MONDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.

$$

GMZ472-202100-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
308 AM CDT Thu Aug 20 2026

.TODAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.TONIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 4 seconds.
.FRIDAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.FRIDAY NIGHT...West winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.SATURDAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 5 seconds.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: Southwest 2 feet at 5 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet.
.MONDAY...West winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight.

$$

GMZ475-202100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
308 AM CDT Thu Aug 20 2026

.TODAY...West winds around 10 knots, diminishing to around
5 knots late this morning and afternoon. Seas around 2 feet this
morning, then 1 foot or less. Wave Detail: Southwest 2 feet at
4 seconds, becoming southwest 1 foot at 4 seconds.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 4 seconds.
.FRIDAY...West winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. Wave Detail: West 1 foot at
3 seconds, becoming west 1 foot at 4 seconds.
.FRIDAY NIGHT...West winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 5 seconds. A slight chance of
showers and thunderstorms after midnight.
.SATURDAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: West 2 feet at 4 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.SATURDAY NIGHT...West winds around 10 knots. Seas around 2 feet.
Wave Detail: Southwest 1 foot at 5 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less. A slight chance of showers and
thunderstorms in the morning.
.SUNDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms after midnight.
.MONDAY...West winds 5 to 10 knots. Seas 1 foot or less.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.

Winds and seas higher in and near thunderstorms.

$$