979
FZUS54 KLCH 211726
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
1226 PM CDT Mon Jul 21 2025

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.

GMZ400-220600-
1226 PM CDT Mon Jul 21 2025

.Synopsis for Lower Atchafalaya River LA to High Island TX out
60 NM including Sabine and Calcasieu Lakes and Vermilion and Cote
Blanche Bays...

High pressure will keep conditions calm across the Gulf for the
first half of the week. Waves will remain between 1 and 3 feet
with winds from the south-southwest around 10 knots. A tropical
disturbance will bring increased rain starting Wednesday night and
lasting through Friday. No impacts are expected from this system,
and the NHC does not have an invest area over the Gulf at this
time. As this system approaches, we will continue to refine the
forecast and make updates as needed.

$$

GMZ430-220600-
Sabine Lake-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds 5 to 10 knots, becoming southwest late.
Lake waters light chop.
.TUESDAY...Southwest winds around 5 knots. Lake waters smooth.
.TUESDAY NIGHT...Southwest winds around 5 knots. Lake waters
smooth.
.WEDNESDAY...West winds around 5 knots. Lake waters smooth.
.WEDNESDAY NIGHT...Southwest winds around 5 knots. Lake waters
smooth.
.THURSDAY...West winds around 5 knots. Lake waters smooth. A
chance of showers and thunderstorms.
.THURSDAY NIGHT...South winds around 5 knots. Lake waters smooth.
A chance of showers and thunderstorms.
.FRIDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Lake waters smooth. Showers likely. A chance of
thunderstorms in the morning, then thunderstorms likely in the
afternoon.
.FRIDAY NIGHT...South winds around 5 knots. Lake waters smooth. A
slight chance of showers and thunderstorms in the evening, then a
chance of showers and thunderstorms after midnight.
.SATURDAY...Southwest winds 5 to 10 knots. Lake waters light
chop. Showers likely with a chance of thunderstorms in the
morning, then showers and thunderstorms likely in the afternoon.
.SATURDAY NIGHT...South 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.

$$

GMZ432-220600-
Calcasieu Lake-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds 5 to 10 knots. Lake waters light chop.
.TUESDAY...West winds around 5 knots, becoming south around
5 knots in the afternoon. Lake waters smooth.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY...West winds around 5 knots. Lake waters smooth.
.WEDNESDAY NIGHT...West winds around 5 knots. Lake waters smooth.
A slight chance of showers and thunderstorms after midnight.
.THURSDAY...West winds around 5 knots. Lake waters smooth. A
chance of showers and thunderstorms.
.THURSDAY NIGHT...South winds around 5 knots. Lake waters smooth.
A chance of showers and thunderstorms.
.FRIDAY...East winds around 5 knots, becoming southeast in the
afternoon. Lake waters smooth. Showers. A chance of thunderstorms
in the morning, then thunderstorms likely in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms in the
evening, then a chance of showers and thunderstorms after
midnight.
.SATURDAY...South winds 5 to 10 knots. Lake waters light chop.
Showers likely with a chance of thunderstorms in the morning,
then showers and thunderstorms likely in the afternoon.
.SATURDAY NIGHT...South 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.

$$

GMZ435-220600-
Vermilion and West Cote Blanche Bays-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...Southwest winds 5 to 10 knots. Bay waters light chop.
.TUESDAY...Northwest winds around 5 knots, becoming southwest in
the afternoon. Bay waters smooth.
.TUESDAY NIGHT...West winds around 5 knots. Bay waters smooth.
.WEDNESDAY...Northwest winds around 5 knots. Bay waters smooth. A
slight chance of showers and thunderstorms in the morning, then a
chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...West winds around 5 knots. Bay waters smooth.
A slight chance of showers and thunderstorms in the evening, then
a chance of showers and thunderstorms after midnight.
.THURSDAY...Northwest winds around 5 knots, becoming west in the
afternoon. Bay waters smooth. Thunderstorms likely. Showers.
.THURSDAY NIGHT...Southeast winds around 5 knots. Bay waters
smooth. A chance of thunderstorms. A chance of showers in the
evening, then showers likely after midnight.
.FRIDAY...East winds around 5 knots, becoming south in the
afternoon. Bay waters light chop. Showers. A chance of
thunderstorms in the morning, then thunderstorms likely in the
afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop.
A chance of thunderstorms. A chance of showers.
.SATURDAY...South winds 5 to 10 knots. Bay waters light chop.
Showers with a chance of thunderstorms in the morning, then
showers with thunderstorms likely in the afternoon.
.SATURDAY NIGHT...South winds 5 to 10 knots. Bay waters light
chop. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-220600-
Atchafalaya and East Cote Blanche Bays-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...Southwest winds around 5 knots. Bay waters smooth.
.TUESDAY...West winds around 5 knots. Bay waters smooth.
.TUESDAY NIGHT...West winds around 5 knots. Bay waters smooth.
.WEDNESDAY...Northwest winds around 5 knots. Bay waters smooth. A
chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Northwest winds around 5 knots. Bay waters
smooth. A chance of showers and thunderstorms in the evening,
then showers and thunderstorms likely after midnight.
.THURSDAY...North winds around 5 knots, becoming west in the
afternoon. Bay waters smooth. Showers with thunderstorms likely.
.THURSDAY NIGHT...East winds around 5 knots. Bay waters smooth. A
chance of thunderstorms. Showers.
.FRIDAY...Southeast winds around 5 knots, becoming south in the
afternoon. Bay waters light chop. Showers with a chance of
thunderstorms in the morning, then showers with thunderstorms
likely in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop.
A chance of thunderstorms. A chance of showers in the evening,
then showers likely after midnight.
.SATURDAY...South winds 5 to 10 knots. Bay waters light chop.
Showers. A chance of thunderstorms in the morning, then
thunderstorms likely in the afternoon.
.SATURDAY NIGHT...South winds 5 to 10 knots. Bay waters light
chop. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-220600-
Coastal waters from Cameron LA to High Island TX out 20 NM-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.TUESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 1 foot at 4 seconds.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 1 foot at 4 seconds.
.WEDNESDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: South 1 foot at 4 seconds.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 4 seconds. A slight chance of
showers and thunderstorms after midnight.
.THURSDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds and southeast 1 foot at
5 seconds. A chance of showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. A chance of thunderstorms. A chance of showers in the
evening, then showers likely after midnight.
.FRIDAY...North winds 5 to 10 knots, becoming southeast in the
afternoon. Seas around 2 feet. A chance of thunderstorms. Showers
likely.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...Southwest winds around 10 knots. Seas 2 to 3 feet. A
chance of thunderstorms. Showers likely, mainly in the morning.
.SATURDAY NIGHT...South winds around 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-220600-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: South 1 foot at
4 seconds.
.TUESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet in
the morning, then 1 foot or less. Wave Detail: South 1 foot at
4 seconds. A slight chance of showers and thunderstorms in the
morning.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 4 seconds.
.WEDNESDAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Southwest 1 foot at 4 seconds. A slight chance of showers
and thunderstorms.
.WEDNESDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 4 seconds and south 1 foot at
4 seconds. A slight chance of showers and thunderstorms in the
evening, then a chance of showers and thunderstorms after
midnight.
.THURSDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 3 seconds. Showers and
thunderstorms likely.
.THURSDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
A chance of thunderstorms. A chance of showers in the evening,
then showers likely after midnight.
.FRIDAY...East winds 5 to 10 knots, becoming south in the
afternoon. Seas 1 foot or less, then around 2 feet in the
afternoon. Showers with a chance of thunderstorms.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of thunderstorms. A chance of showers in the evening, then
showers likely after midnight.
.SATURDAY...Southwest winds around 10 knots. Seas 2 to 3 feet. A
chance of thunderstorms. Showers.
.SATURDAY NIGHT...South winds around 10 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-220600-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...Southwest winds around 5 knots. Seas 1 foot or less.
.TUESDAY...West winds around 5 knots. Seas 1 foot or less. Wave
Detail: Southwest 1 foot at 3 seconds.
.TUESDAY NIGHT...West winds around 5 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. A slight chance of
showers and thunderstorms after midnight.
.WEDNESDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. A slight chance of showers
and thunderstorms in the evening, then showers and thunderstorms
likely after midnight.
.THURSDAY...Northwest winds 5 to 10 knots, becoming west in the
afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
3 seconds. Showers. Thunderstorms likely, mainly in the morning.
.THURSDAY NIGHT...South winds around 5 knots. Seas 1 foot or
less. A chance of thunderstorms. Showers.
.FRIDAY...South winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. A chance of thunderstorms.
Showers.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. A
chance of thunderstorms. A chance of showers in the evening, then
showers likely after midnight.
.SATURDAY...South winds 5 to 10 knots. Seas around 2 feet. A
chance of thunderstorms. Showers.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-220600-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.TUESDAY...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 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: South 2 feet at 5 seconds.
.WEDNESDAY...West winds around 5 knots. Seas around 2 feet. Wave
Detail: South 1 foot at 5 seconds.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 5 seconds. A slight chance of
showers and thunderstorms after midnight.
.THURSDAY...West winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less. Wave Detail: West 1 foot at
3 seconds and southeast 1 foot at 5 seconds. A chance of showers
and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. A chance of thunderstorms. A chance of showers in the
evening, then showers likely after midnight.
.FRIDAY...Southwest winds around 10 knots, becoming south in the
afternoon. Seas around 2 feet. A chance of thunderstorms.
Showers.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...Southwest winds around 10 knots. Seas 2 to 3 feet. A
chance of thunderstorms. Showers likely, mainly in the morning.
.SATURDAY NIGHT...South winds around 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-220600-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 1 foot at 5 seconds.
.TUESDAY...Southwest winds 5 to 10 knots, diminishing to around
5 knots in the afternoon. Seas around 2 feet. Wave Detail:
Southwest 1 foot at 4 seconds and southeast 1 foot at 5 seconds.
A slight chance of showers and thunderstorms in the morning.
.TUESDAY NIGHT...Southwest winds around 5 knots. Seas around
2 feet in the evening, then 1 foot or less. Wave Detail: South
1 foot at 5 seconds.
.WEDNESDAY...Northwest winds around 5 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 4 seconds and southeast 1 foot
at 5 seconds. A slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 4 seconds and southeast 1 foot at
5 seconds. A chance of showers and thunderstorms after midnight.
.THURSDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 3 seconds and southeast 1 foot
at 5 seconds. Showers with thunderstorms likely in the morning,
then showers likely with a chance of thunderstorms in the
afternoon.
.THURSDAY NIGHT...West winds 5 to 10 knots, becoming south after
midnight. Seas 1 foot or less. A chance of thunderstorms. A
chance of showers in the evening, then showers after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. A chance of thunderstorms.
Showers.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...South winds around 10 knots. Seas around 2 feet. A
chance of thunderstorms. Showers.
.SATURDAY NIGHT...South winds around 10 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-220600-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
1226 PM CDT Mon Jul 21 2025

.TONIGHT...South winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: Southeast 1 foot at
5 seconds, becoming south 1 foot at 5 seconds.
.TUESDAY...Northwest winds around 5 knots. Seas around 2 feet in
the morning, then 1 foot or less. Wave Detail: South 1 foot at
5 seconds. A slight chance of showers and thunderstorms in the
morning.
.TUESDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 5 seconds. A slight chance of
showers and thunderstorms after midnight.
.WEDNESDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds and southeast 1 foot at
5 seconds. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Northwest 1 foot at 3 seconds and southeast
1 foot at 5 seconds. A slight chance of showers and thunderstorms
in the evening, then showers and thunderstorms likely after
midnight.
.THURSDAY...Northwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northwest 1 foot at 3 seconds and southeast 1 foot
at 5 seconds. Showers. Thunderstorms, mainly in the morning.
.THURSDAY NIGHT...West winds around 5 knots, becoming south after
midnight. Seas 1 foot or less. A chance of thunderstorms.
Showers.
.FRIDAY...Southwest winds around 10 knots. Seas 2 to 3 feet. A
chance of thunderstorms. Showers.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...South winds 5 to 10 knots. Seas around 2 feet. A
chance of thunderstorms. Showers, mainly in the morning.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
A chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$