984
FZUS54 KLCH 172010
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
309 PM CDT Thu Sep 17 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.

GMZ400-180900-
309 PM CDT Thu Sep 17 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 fairly tight pressure gradient will exist across the coastal
waters through the evening behind a weak boundary. An SCA will
remain in effect for a portion of the marine zone through 6Z.
Winds will relax into the weekend.

$$

GMZ430-180900-
Sabine Lake-
309 PM CDT Thu Sep 17 2026

.TONIGHT...Southeast winds 5 to 10 knots, becoming east late.
Lake waters light chop.
.FRIDAY...East winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...Southeast winds around 5 knots. Lake waters
smooth.
.SATURDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Lake waters light chop.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, diminishing to
around 5 knots after midnight. Lake waters light chop.
.SUNDAY...Southeast winds around 5 knots. Lake waters smooth.
.SUNDAY NIGHT...South winds around 5 knots. Lake waters smooth.
.MONDAY...North winds around 5 knots, becoming southeast in the
afternoon. Lake waters smooth. A slight chance of showers and
thunderstorms.
.MONDAY NIGHT...South winds around 5 knots, becoming west after
midnight. Lake waters smooth.
.TUESDAY...North winds around 5 knots, becoming east in the
afternoon. Lake waters smooth.
.TUESDAY NIGHT...Southeast winds around 5 knots. Lake waters
smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-180900-
Calcasieu Lake-
309 PM CDT Thu Sep 17 2026

.TONIGHT...East winds 5 to 10 knots. Lake waters light chop.
.FRIDAY...East winds 5 to 10 knots. Lake waters light chop.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots, becoming east
after midnight. Lake waters light chop.
.SATURDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Lake waters light chop.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters
light chop.
.SUNDAY...Southeast winds 5 to 10 knots. Lake waters light chop.
.SUNDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...North winds around 5 knots, becoming southeast around
5 knots in the afternoon. Lake waters smooth. A slight chance of
showers and thunderstorms.
.MONDAY NIGHT...South winds around 5 knots, becoming west around
5 knots after midnight. Lake waters smooth.
.TUESDAY...North winds around 5 knots, becoming east in the
afternoon. Lake waters smooth. A slight chance of showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...Southeast winds around 5 knots. Lake waters
smooth. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-180900-
Vermilion and West Cote Blanche Bays-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 1 AM CDT FRIDAY...

.TONIGHT...East winds 10 to 15 knots. Bay waters choppy.
.FRIDAY...East winds 5 to 10 knots. Bay waters light chop.
.FRIDAY NIGHT...East winds 5 to 10 knots. Bay waters light chop.
.SATURDAY...East winds 5 to 10 knots. Bay waters light chop.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light
chop.
.SUNDAY...East winds around 5 knots, becoming southeast in the
afternoon. Bay waters smooth.
.SUNDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth. A slight chance of showers and thunderstorms after
midnight.
.MONDAY...North winds around 5 knots, becoming southeast around
5 knots in the afternoon. Bay waters smooth. A slight chance of
showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming
northeast after midnight. Bay waters smooth.
.TUESDAY...Northeast winds around 5 knots, becoming east around
5 knots in the afternoon. Bay waters smooth. A slight chance of
showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...Southeast winds around 5 knots. Bay waters
smooth. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-180900-
Atchafalaya and East Cote Blanche Bays-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 1 AM CDT FRIDAY...

.TONIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Bay waters choppy.
.FRIDAY...East winds 5 to 10 knots. Bay waters light chop.
.FRIDAY NIGHT...East winds 5 to 10 knots. Bay waters light chop.
.SATURDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Bay waters light chop.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light
chop.
.SUNDAY...East winds around 5 knots, becoming southeast in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms in the afternoon.
.SUNDAY NIGHT...South winds around 5 knots. Bay waters smooth. A
slight chance of showers and thunderstorms after midnight.
.MONDAY...North winds around 5 knots, becoming west in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming
northeast after midnight. Bay waters smooth.
.TUESDAY...Northeast 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...Southeast winds around 5 knots. Bay waters
smooth. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-180900-
Coastal waters from Cameron LA to High Island TX out 20 NM-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 7 PM THIS EVENING
TO 1 AM CDT FRIDAY...

.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds.
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds.
.FRIDAY NIGHT...Southeast winds around 10 knots. Seas around
2 feet. Wave Detail: Southeast 2 feet at 5 seconds.
.SATURDAY...East winds around 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas around
2 feet. Wave Detail: Southeast 2 feet at 4 seconds.
.SUNDAY...Southeast 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.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Southeast winds 5 to 10 knots, diminishing to around
5 knots in the afternoon. Seas 1 foot or less. A slight chance of
showers and thunderstorms in the morning.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
.TUESDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas 1 foot or less. A slight chance of showers and
thunderstorms in the morning.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-180900-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT FRIDAY...

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

Winds and seas higher in and near thunderstorms.

$$

GMZ455-180900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT FRIDAY...

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

Winds and seas higher in and near thunderstorms.

$$

GMZ470-180900-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 7 PM THIS EVENING
TO 1 AM CDT FRIDAY...

.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East
5 feet at 7 seconds.
.FRIDAY...East winds around 15 knots with gusts up to 20 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East
5 feet at 7 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet. Wave Detail: East 4 feet at
7 seconds.
.SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 7 seconds.
.SATURDAY NIGHT...Southeast winds around 10 knots. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.SUNDAY...Southeast winds around 5 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 6 seconds.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet.
.MONDAY...East winds around 5 knots. Seas around 2 feet in the
morning, then 1 foot or less. A slight chance of showers and
thunderstorms in the morning.
.MONDAY NIGHT...Southeast winds around 5 knots. Seas 1 foot or
less. A slight chance of showers and thunderstorms after
midnight.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. A
chance of showers and thunderstorms in the morning.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-180900-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT FRIDAY...

.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East
6 feet at 7 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East
5 feet at 7 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at
7 seconds.
.SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 6 seconds.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to
5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 6 seconds.
.SUNDAY...Southeast winds around 5 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 6 seconds.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms after
midnight.
.MONDAY...East winds around 5 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms in the morning.
.MONDAY NIGHT...East winds around 5 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms after midnight.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-180900-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
309 PM CDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT FRIDAY...

.TONIGHT...East winds 20 to 25 knots, diminishing to 15 to
20 knots late. Seas 5 to 7 feet, occasionally to 9 feet. Wave
Detail: East 7 feet at 7 seconds.
.FRIDAY...East winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: East 6 feet at 7 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: East 5 feet at 7 seconds.
.SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds. A slight chance of showers. A
slight chance of thunderstorms in the afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots, becoming southeast
5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 6 seconds.
.SUNDAY...East winds around 5 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds. A slight chance of showers
and thunderstorms in the morning.
.SUNDAY NIGHT...Southeast winds around 5 knots. Seas around
2 feet. A slight chance of showers and thunderstorms after
midnight.
.MONDAY...Northeast winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms, mainly in the morning.
.MONDAY NIGHT...East winds around 5 knots. Seas 1 foot or less.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. A slight chance of showers
and thunderstorms in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$