451
FZUS54 KLCH 202010
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
310 PM CDT Sun Sep 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.

GMZ400-210900-
310 PM CDT Sun Sep 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...

A light onshore flow will remain through late Tuesday. A weak cold
front will move into the coastal waters early Wednesday with a
light to moderate northeast to east flow remaining through the
rest of the week.

$$

GMZ430-210900-
Sabine Lake-
310 PM CDT Sun Sep 20 2026

.TONIGHT...South winds 5 to 10 knots, becoming light and
variable. Lake waters light chop.
.MONDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Lake waters smooth. A slight chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...South winds around 5 knots, becoming west after
midnight. Lake waters smooth. A slight chance of showers and
thunderstorms in the evening.
.TUESDAY...North winds around 5 knots. Lake waters smooth.
.TUESDAY NIGHT...Southeast winds around 5 knots. Lake waters
smooth.
.WEDNESDAY...Northeast winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY NIGHT...East winds around 5 knots, becoming northeast
after midnight. Lake waters light chop.
.THURSDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Lake waters choppy.
.THURSDAY NIGHT...Northeast winds around 5 knots, increasing to
5 to 10 knots after midnight. Lake waters light chop.
.FRIDAY...Northeast winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...East winds around 5 knots. Lake waters smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-210900-
Calcasieu Lake-
310 PM CDT Sun Sep 20 2026

.TONIGHT...South winds 5 to 10 knots, diminishing to around
5 knots after midnight. Lake waters light chop.
.MONDAY...Northeast winds around 5 knots, becoming south in the
afternoon. Lake waters smooth. A slight chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds around 5 knots, becoming west
around 5 knots after midnight. Lake waters smooth. A slight
chance of showers and thunderstorms in the evening.
.TUESDAY...North winds 5 to 10 knots, becoming northeast in the
afternoon. Lake waters light chop. A slight chance of showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...Southeast winds around 5 knots. Lake waters
smooth.
.WEDNESDAY...Northeast winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Lake waters
light chop.
.THURSDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Lake waters choppy.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Lake waters
light chop.
.FRIDAY...Northeast winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...Northeast winds around 5 knots. Lake waters
smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-210900-
Vermilion and West Cote Blanche Bays-
310 PM CDT Sun Sep 20 2026

.TONIGHT...South winds 5 to 10 knots, becoming southwest after
midnight. Bay waters light chop.
.MONDAY...North winds around 5 knots, becoming southwest in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...South winds around 5 knots, becoming northwest
after midnight. Bay waters smooth. A slight chance of showers and
thunderstorms in the evening.
.TUESDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...Southeast winds around 5 knots, becoming east
after midnight. Bay waters smooth.
.WEDNESDAY...Northeast winds 5 to 10 knots. Bay waters light
chop.
.WEDNESDAY NIGHT...East winds around 5 knots, becoming northeast
after midnight. Bay waters light chop.
.THURSDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Bay waters choppy.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Bay waters light
chop.
.FRIDAY...Northeast winds 5 to 10 knots. Bay waters light chop.
.FRIDAY NIGHT...East winds 5 to 10 knots. Bay waters light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-210900-
Atchafalaya and East Cote Blanche Bays-
310 PM CDT Sun Sep 20 2026

.TONIGHT...South winds around 5 knots until early morning,
becoming light and variable. Bay waters smooth.
.MONDAY...North winds around 5 knots, becoming west in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds around 5 knots, becoming north
after midnight. Bay waters smooth. A slight chance of showers and
thunderstorms in the evening.
.TUESDAY...North winds around 5 knots, becoming east around
5 knots in the afternoon. Bay waters smooth. A chance of showers
and thunderstorms in the afternoon.
.TUESDAY NIGHT...East winds around 5 knots. Bay waters smooth.
.WEDNESDAY...Northeast winds 5 to 10 knots. Bay waters light
chop. A slight chance of showers and thunderstorms in the
afternoon.
.WEDNESDAY NIGHT...East winds around 5 knots, becoming northeast
after midnight. Bay waters light chop.
.THURSDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Bay waters choppy.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Bay waters light
chop.
.FRIDAY...Northeast winds 5 to 10 knots. Bay waters light chop.
.FRIDAY NIGHT...East winds 5 to 10 knots. Bay waters light chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-210900-
Coastal waters from Cameron LA to High Island TX out 20 NM-
310 PM CDT Sun Sep 20 2026

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 4 seconds.
.MONDAY...East winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Southeast 1 foot at 4 seconds.
.MONDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Seas 1 foot or less. Wave Detail: Southeast
1 foot at 4 seconds.
.TUESDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at
3 seconds and southeast 1 foot at 4 seconds. A slight chance of
showers and thunderstorms in the morning.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southeast 1 foot at 3 seconds. A slight chance
of showers and thunderstorms after midnight.
.WEDNESDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 2 feet at 3 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Seas 1 foot or
less, then around 2 feet after midnight. A slight chance of
showers and thunderstorms after midnight.
.THURSDAY...Northeast winds 15 to 20 knots, becoming east 10 to
15 knots in the afternoon. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-210900-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
310 PM CDT Sun Sep 20 2026

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 1 foot at 3 seconds.
.MONDAY...East winds around 5 knots, becoming southeast around
5 knots in the afternoon. Seas 1 foot or less. Wave Detail:
Southeast 1 foot at 4 seconds.
.MONDAY NIGHT...South winds around 5 knots, becoming west after
midnight. Seas 1 foot or less. Wave Detail: South 1 foot at
4 seconds.
.TUESDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds and east 1 foot at 4 seconds.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southeast 1 foot at 2 seconds.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northeast 1 foot at 3 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, becoming northeast
10 to 15 knots after midnight. Seas 1 foot or less, then around
2 feet after midnight.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas around
2 feet.
.FRIDAY...Northeast winds 10 to 15 knots, becoming east 5 to
10 knots in the afternoon. Seas around 2 feet.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.

$$

GMZ455-210900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
310 PM CDT Sun Sep 20 2026

.TONIGHT...Southeast winds around 5 knots. Seas 1 foot or less.
Wave Detail: Southeast 1 foot at 3 seconds.
.MONDAY...Northeast winds around 5 knots, becoming west in the
afternoon. Seas 1 foot or less. Wave Detail: Southeast 1 foot at
3 seconds. A slight chance of showers and thunderstorms in the
afternoon.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming north
after midnight. Seas 1 foot or less.
.TUESDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds around 5 knots. Seas 1 foot or
less.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northeast 1 foot at 3 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less.
.THURSDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 1 to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight.
.FRIDAY...Northeast winds 10 to 15 knots, becoming east 5 to
10 knots in the afternoon. Seas 1 to 2 feet.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-210900-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
310 PM CDT Sun Sep 20 2026

.TONIGHT...Southeast winds around 10 knots, diminishing to around
5 knots late. Seas around 2 feet. Wave Detail: Southeast 2 feet
at 6 seconds.
.MONDAY...East winds around 5 knots. Seas around 2 feet in the
morning, then 1 foot or less. Wave Detail: Southeast 1 foot at
5 seconds.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southeast 1 foot at 4 seconds.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: East 1 foot at
4 seconds, becoming north 2 feet at 3 seconds. A slight chance of
showers and thunderstorms in the morning.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: East 1 foot at 3 seconds. A slight chance of
showers and thunderstorms after midnight.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: Northeast 2 feet at 4 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
A slight chance of showers and thunderstorms after midnight.
.THURSDAY...Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 2 to 4 feet. A slight chance of
showers and thunderstorms in the morning.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-210900-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
310 PM CDT Sun Sep 20 2026

.TONIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.MONDAY...East winds around 5 knots. Seas 1 foot or less. Wave
Detail: Southeast 1 foot at 5 seconds.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming
northeast after midnight. Seas 1 foot or less. Wave Detail:
Southeast 1 foot at 4 seconds.
.TUESDAY...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: North 2 feet at 3 seconds. A slight chance of
showers and thunderstorms in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 3 seconds and east 1 foot at
4 seconds.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: East 2 feet at 4 seconds.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
.THURSDAY...Northeast winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-210900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
310 PM CDT Sun Sep 20 2026

.TONIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.MONDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southeast 1 foot at 5 seconds.
.MONDAY NIGHT...Northeast winds around 5 knots. Seas 1 foot or
less. Wave Detail: East 1 foot at 4 seconds.
.TUESDAY...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Northeast 2 feet at 4 seconds. A slight chance of
showers and thunderstorms in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: East 2 feet at 4 seconds.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 4 seconds.
.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots, becoming northeast 5 to 10 knots after midnight. Seas
2 to 3 feet.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$