737
FZUS54 KLCH 180809
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
308 AM CDT Sat Jul 18 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.

GMZ400-182100-
308 AM CDT Sat Jul 18 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...

Light southerly to westerly flow and low seas are expected to
continue through the forecast period with weak surface high pressure
meandering about. Mainly dry conditions are expected to prevail as
high pressure builds overhead.

$$

GMZ430-182100-
Sabine Lake-
308 AM CDT Sat Jul 18 2026

.TODAY...Southwest winds around 5 knots, increasing to 5 to
10 knots late. Lake waters light chop.
.TONIGHT...Southwest winds 5 to 10 knots. Lake waters light chop.
.SUNDAY...West winds around 5 knots. Lake waters smooth.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...West winds around 5 knots. Lake waters smooth.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.TUESDAY...West winds 5 to 10 knots. Lake waters light chop.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-182100-
Calcasieu Lake-
308 AM CDT Sat Jul 18 2026

.TODAY...Southwest winds 5 to 10 knots. Lake waters light chop.
.TONIGHT...Southwest winds 5 to 10 knots. Lake waters light chop.
.SUNDAY...West winds 5 to 10 knots. Lake waters light chop.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...West winds 5 to 10 knots. Lake waters light chop.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.TUESDAY...West winds 5 to 10 knots. Lake waters light chop.
.TUESDAY NIGHT...Southwest winds around 10 knots. Lake waters
light chop.
.WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-182100-
Vermilion and West Cote Blanche Bays-
308 AM CDT Sat Jul 18 2026

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

Winds and waves higher in and near thunderstorms.

$$

GMZ436-182100-
Atchafalaya and East Cote Blanche Bays-
308 AM CDT Sat Jul 18 2026

.TODAY...Northwest winds 5 to 10 knots. Bay waters light chop.
.TONIGHT...West winds 5 to 10 knots. Bay waters light chop.
.SUNDAY...Northwest winds 5 to 10 knots. Bay waters light chop.
.SUNDAY NIGHT...West winds 5 to 10 knots. Bay waters light chop.
.MONDAY...Northwest winds 5 to 10 knots. Bay waters light chop.
.MONDAY NIGHT...West winds 5 to 10 knots. Bay waters light chop.
.TUESDAY...West winds 5 to 10 knots. Bay waters light chop.
.TUESDAY NIGHT...West winds 10 to 15 knots. Bay waters choppy.
.WEDNESDAY...West winds 10 to 15 knots. Bay waters choppy. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...West winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Bay waters choppy. A slight chance of
showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-182100-
Coastal waters from Cameron LA to High Island TX out 20 NM-
308 AM CDT Sat Jul 18 2026

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

Winds and seas higher in and near thunderstorms.

$$

GMZ452-182100-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
308 AM CDT Sat Jul 18 2026

.TODAY...West winds 5 to 10 knots. Seas around 2 feet this
morning, then 1 foot or less. Wave Detail: Southwest 1 foot at
5 seconds.
.TONIGHT...West winds around 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: West 2 feet at 4 seconds.
.SUNDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 3 seconds.
.MONDAY...Northwest winds 10 to 15 knots, becoming west 5 to
10 knots in the afternoon. Seas around 2 feet. Wave Detail: West
2 feet at 4 seconds.
.MONDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet.
.TUESDAY NIGHT...West winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms after midnight.
.WEDNESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...West winds around 15 knots. Seas 2 to 3 feet.
A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-182100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
308 AM CDT Sat Jul 18 2026

.TODAY...Northwest winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northwest 1 foot at 3 seconds.
.TONIGHT...West winds around 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: West 1 foot at
3 seconds.
.SUNDAY...Northwest winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: Northwest 2 feet at 3 seconds.
.SUNDAY NIGHT...West winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: West 1 foot at
3 seconds, becoming west 2 feet at 3 seconds.
.MONDAY...Northwest winds 10 to 15 knots, becoming west 5 to
10 knots in the afternoon. Seas around 2 feet. Wave Detail:
Northwest 2 feet at 3 seconds.
.MONDAY NIGHT...West winds 10 to 15 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: West 1 foot at
3 seconds, becoming west 2 feet at 3 seconds.
.TUESDAY...West winds 5 to 10 knots. Seas around 2 feet.
.TUESDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms.
.WEDNESDAY...West winds 10 to 15 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-182100-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
308 AM CDT Sat Jul 18 2026

.TODAY...Southwest winds around 10 knots, diminishing to around
5 knots late this morning and afternoon. Seas around 2 feet. Wave
Detail: South 2 feet at 6 seconds.
.TONIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds.
.SUNDAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots, becoming west
10 to 15 knots after midnight. Seas around 2 feet. Wave Detail:
South 2 feet at 5 seconds.
.MONDAY...West winds 10 to 15 knots, diminishing to 5 to 10 knots
in the afternoon. Seas around 2 feet. Wave Detail: Southwest
2 feet at 4 seconds and southeast 1 foot at 5 seconds.
.MONDAY NIGHT...Southwest winds 5 to 10 knots, becoming west
10 to 15 knots after midnight. Seas around 2 feet. Wave Detail:
Southwest 2 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas around 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet.
.WEDNESDAY...West winds 10 to 15 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet. A slight chance of showers. A slight chance of
thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-182100-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
308 AM CDT Sat Jul 18 2026

.TODAY...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 1 foot at 6 seconds.
.TONIGHT...West winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: West 2 feet at 4 seconds and south 1 foot at 6 seconds.
.SUNDAY...Northwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: West 2 feet at 4 seconds and south 1 foot at 5 seconds.
.SUNDAY NIGHT...West winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas 1 foot or less, then around 2 feet
after midnight. Wave Detail: West 1 foot at 4 seconds and south
1 foot at 5 seconds, becoming west 2 feet at 3 seconds and south
1 foot at 5 seconds.
.MONDAY...Northwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Northwest 3 feet at 4 seconds.
.MONDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet.
.TUESDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet. A
slight chance of showers. A slight chance of thunderstorms after
midnight.
.WEDNESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
A slight chance of showers. A slight chance of thunderstorms
after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-182100-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
308 AM CDT Sat Jul 18 2026

.TODAY...Northwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northwest 1 foot at 3 seconds and southeast 1 foot at
6 seconds.
.TONIGHT...West winds 5 to 10 knots, increasing to 10 to 15 knots
after midnight. Seas around 2 feet. Wave Detail: Northwest 2 feet
at 3 seconds and south 1 foot at 5 seconds.
.SUNDAY...Northwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Northwest 3 feet at 4 seconds and south 1 foot at 5 seconds.
.SUNDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: North 2 feet at 4 seconds.
.MONDAY...Northwest winds 10 to 15 knots. Seas 2 to 4 feet. Wave
Detail: Northwest 4 feet at 5 seconds.
.MONDAY NIGHT...West winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: West 2 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet. A slight
chance of showers and thunderstorms in the morning.
.TUESDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms.
.WEDNESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms in the morning.
.WEDNESDAY NIGHT...West winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$