149
FZUS54 KLCH 092009
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
309 PM CDT Sun Aug 9 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.

GMZ400-100900-
309 PM CDT Sun Aug 9 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 next week as a surface high
pressure system ridges across the northern Gulf. There will be a
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.

$$

GMZ430-100900-
Sabine Lake-
309 PM CDT Sun Aug 9 2026

.TONIGHT...South winds 5 to 10 knots. Lake waters light chop.
.MONDAY...South winds around 5 knots, increasing to 5 to 10 knots
in the afternoon. Lake waters light chop. Showers likely with a
chance of thunderstorms.
.MONDAY NIGHT...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...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. Lake waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-100900-
Calcasieu Lake-
309 PM CDT Sun Aug 9 2026

.TONIGHT...South winds 5 to 10 knots. Lake waters light chop. A
slight chance of showers and thunderstorms early this evening.
.MONDAY...South winds 5 to 10 knots. Lake waters light chop. A
chance of thunderstorms. Showers likely, mainly in the morning.
.MONDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.TUESDAY...South winds 5 to 10 knots. Lake waters light chop.
.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.

$$

GMZ435-100900-
Vermilion and West Cote Blanche Bays-
309 PM CDT Sun Aug 9 2026

.TONIGHT...South winds 5 to 10 knots. Bay waters light chop. A
slight chance of showers and thunderstorms early this evening.
.MONDAY...Southeast winds around 5 knots, becoming south in the
afternoon. Bay waters light chop. A chance of showers and
thunderstorms.
.MONDAY NIGHT...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.
.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 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.

$$

GMZ436-100900-
Atchafalaya and East Cote Blanche Bays-
309 PM CDT Sun Aug 9 2026

.TONIGHT...Southeast winds 5 to 10 knots. Bay waters light chop.
A slight chance of showers and thunderstorms early this evening.
.MONDAY...South winds around 5 knots. Bay waters smooth. A chance
of showers and thunderstorms.
.MONDAY NIGHT...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 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.

$$

GMZ450-100900-
Coastal waters from Cameron LA to High Island TX out 20 NM-
309 PM CDT Sun Aug 9 2026

.TONIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 4 seconds. A slight chance of showers
and thunderstorms late.
.MONDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A chance of showers and
thunderstorms.
.MONDAY NIGHT...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 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet.
.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 2 to 3 feet.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-100900-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
309 PM CDT Sun Aug 9 2026

.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.MONDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A chance of showers and
thunderstorms.
.MONDAY NIGHT...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 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 3 seconds.
.WEDNESDAY...Southwest 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.
.THURSDAY...Southwest 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 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.

$$

GMZ455-100900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
309 PM CDT Sun Aug 9 2026

.TONIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southeast 1 foot at 2 seconds.
.MONDAY...South winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: South 1 foot at 4 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.MONDAY NIGHT...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: South 1 foot at
3 seconds, becoming southwest 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.
.THURSDAY...Southwest 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 around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-100900-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
309 PM CDT Sun Aug 9 2026

.TONIGHT...Southeast winds around 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds. A slight chance of
showers and thunderstorms late.
.MONDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds. A chance of showers and
thunderstorms.
.MONDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: Southeast 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 2 to 3 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.WEDNESDAY...South winds around 10 knots. Seas 2 to 3 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.
.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 around 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-100900-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
309 PM CDT Sun Aug 9 2026

.TONIGHT...Southeast winds around 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.MONDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 4 seconds. A chance of showers and
thunderstorms.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 4 seconds.
.TUESDAY...Southeast 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: Southeast 2 feet at 5 seconds.
.WEDNESDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY...South winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. 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.

$$

GMZ475-100900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
309 PM CDT Sun Aug 9 2026

.TONIGHT...Southeast winds around 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds. A slight chance of
showers early this evening.
.MONDAY...South winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less. Wave Detail: Southeast 2 feet at
4 seconds, becoming southeast 1 foot at 4 seconds. A chance of
showers and thunderstorms, mainly in the morning.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet. Wave Detail: Southeast 2 feet at 4 seconds.
.TUESDAY...Southeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: 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: 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 2 to 3 feet.
.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.

$$