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FZUS54 KLCH 130809
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Coastal Waters Forecast
National Weather Service Lake Charles LA
308 AM CDT Thu Aug 13 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.

GMZ400-132100-
308 AM CDT Thu Aug 13 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 ridge extending west from the northeast Gulf
will keep a southerly fetch in place over the period. Winds will
prevail below 10 knots, which also keeps seas low.

A slug of tropical moisture moving up the Texas coastline late
Thursday night into early Friday morning could bring scattered
showers to western waters prior to sunrise Friday. High pressure
over the region will strengthen rapidly on Friday, dissipating any
lingering rainfall quickly into the morning. No rain chances
anticipated through the weekend.

$$

GMZ430-132100-
Sabine Lake-
308 AM CDT Thu Aug 13 2026

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

Winds and waves higher in and near thunderstorms.

$$

GMZ432-132100-
Calcasieu Lake-
308 AM CDT Thu Aug 13 2026

.TODAY...Southwest winds 10 to 15 knots. Lake waters choppy.
.TONIGHT...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.
.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.
.SUNDAY...Northwest 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...West winds around 5 knots, becoming southwest in the
afternoon. Lake waters light chop.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.

$$

GMZ435-132100-
Vermilion and West Cote Blanche Bays-
308 AM CDT Thu Aug 13 2026

.TODAY...Southwest winds 5 to 10 knots. Bay waters light chop.
.TONIGHT...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...Southwest winds 5 to 10 knots. Bay waters light
chop.
.SATURDAY...West winds around 5 knots, becoming southwest in the
afternoon. Bay waters light chop.
.SATURDAY NIGHT...Southwest 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...West winds around 5 knots, becoming southwest in the
afternoon. Bay waters light chop. A slight 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.

$$

GMZ436-132100-
Atchafalaya and East Cote Blanche Bays-
308 AM CDT Thu Aug 13 2026

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

$$

GMZ450-132100-
Coastal waters from Cameron LA to High Island TX out 20 NM-
308 AM CDT Thu Aug 13 2026

.TODAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 5 seconds.
.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds.
.FRIDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.SATURDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds and south 1 foot at 2 seconds.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.SUNDAY...West winds 5 to 10 knots, becoming south in the
afternoon. 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, becoming southwest in the
afternoon. Seas 1 foot or less.
.MONDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet.

$$

GMZ452-132100-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
308 AM CDT Thu Aug 13 2026

.TODAY...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 3 feet at 4 seconds.
.TONIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 4 seconds.
.FRIDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.SATURDAY...Southwest winds around 5 knots, becoming south in the
afternoon. 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 1 foot at 4 seconds.
.SUNDAY...West winds around 5 knots, becoming southwest in the
afternoon. 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 1 foot or less. A slight
chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-132100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
308 AM CDT Thu Aug 13 2026

.TODAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 3 seconds.
.FRIDAY...South winds 5 to 10 knots. Seas 1 to 2 feet in the
morning, then 1 foot or less. Wave Detail: South 1 foot at
3 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
.SATURDAY...West winds around 5 knots, becoming south in the
afternoon. Seas 1 foot or less.
.SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 2 seconds.
.SUNDAY...West winds around 5 knots. Seas 1 foot or less.
.SUNDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less.
.MONDAY...West winds around 5 knots. Seas 1 foot or less.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less.

$$

GMZ470-132100-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
308 AM CDT Thu Aug 13 2026

.TODAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 5 seconds.
.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds.
.FRIDAY...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 5 seconds. A slight chance of showers and
thunderstorms in the morning.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: South 3 feet at 6 seconds.
.SATURDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds.
.SUNDAY...West winds around 5 knots, becoming southeast in the
afternoon. Seas around 2 feet.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Southwest winds around 5 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.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-132100-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
308 AM CDT Thu Aug 13 2026

.TODAY...Southwest winds 10 to 15 knots, becoming south 5 to
10 knots late this morning and afternoon. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds.
.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds.
.FRIDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 5 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds.
.SATURDAY...South winds around 5 knots, becoming southeast in the
afternoon. Seas around 2 feet. Wave Detail: South 2 feet at
5 seconds.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.SUNDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Seas around 2 feet.
.SUNDAY NIGHT...South winds around 5 knots. Seas around 2 feet.
.MONDAY...West winds around 5 knots. Seas 1 foot or less.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight.

$$

GMZ475-132100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
308 AM CDT Thu Aug 13 2026

.TODAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds.
.TONIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds.
.FRIDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.SATURDAY...South winds around 5 knots, becoming east in the
afternoon. Seas around 2 feet. Wave Detail: South 2 feet at
5 seconds.
.SATURDAY NIGHT...South winds around 5 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds.
.SUNDAY...Northwest winds around 5 knots, becoming northeast
around 5 knots in the afternoon. Seas around 2 feet.
.SUNDAY NIGHT...South winds around 5 knots. Seas 1 foot or less.
.MONDAY...West winds around 5 knots. Seas 1 foot or less.
.MONDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less.

$$