116
FZUS54 KLCH 181802
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
102 PM CDT Mon Aug 18 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.

GMZ400-190700-
102 PM CDT Mon Aug 18 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...

Outside of thunderstorms, winds and seas will remain low over the
period as weak high pressure meanders over the region. Periods of
on and off showers and storms will also follow the regime of
variable pressure with greater coverage expected through the
latter half of the work week.

$$

GMZ430-190700-
Sabine Lake-
102 PM CDT Mon Aug 18 2025

.TONIGHT...West winds around 5 knots, becoming northeast late
this evening, then becoming light and variable after midnight,
becoming north around 5 knots late. Lake waters smooth. A chance
of showers and thunderstorms.
.TUESDAY...North winds around 5 knots, becoming southeast in the
afternoon. Lake waters smooth. A chance of thunderstorms. Showers
likely, mainly in the morning.
.TUESDAY NIGHT...Southeast winds around 5 knots, becoming west
after midnight. Lake waters smooth. A slight chance of showers
and thunderstorms.
.WEDNESDAY...North winds around 5 knots, becoming east in the
afternoon. Lake waters smooth. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...West winds around 5 knots, becoming northwest
after midnight. Lake waters smooth. A chance of showers and
thunderstorms.
.THURSDAY...North winds around 5 knots, becoming south around
5 knots in the afternoon. Lake waters smooth. A chance of showers
and thunderstorms in the morning, then showers and thunderstorms
likely in the afternoon.
.THURSDAY NIGHT...South winds around 5 knots in the evening,
becoming light and variable. Lake waters smooth. A chance of
showers. A chance of thunderstorms, mainly in the evening.
.FRIDAY...North winds around 5 knots, becoming southeast around
5 knots in the afternoon. Lake waters smooth. Showers likely. A
chance of thunderstorms in the morning, then thunderstorms likely
in the afternoon.
.FRIDAY NIGHT...Southeast winds around 5 knots in the evening,
becoming light and variable. Lake waters smooth. A chance of
showers and thunderstorms in the evening, then a chance of
showers with a slight chance of thunderstorms after midnight.
.SATURDAY...North winds around 5 knots, becoming east in the
afternoon. Lake waters smooth. Showers likely with a chance of
thunderstorms.
.SATURDAY NIGHT...South winds around 5 knots, becoming west
around 5 knots after midnight. Lake waters smooth. A chance of
showers with a slight chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-190700-
Calcasieu Lake-
102 PM CDT Mon Aug 18 2025

.TONIGHT...West winds around 5 knots, becoming northeast around
5 knots late this evening and overnight. Lake waters smooth. A
chance of thunderstorms. A chance of showers.
.TUESDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Lake waters smooth. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...South winds around 5 knots, becoming west around
5 knots after midnight. Lake waters smooth. A slight chance of
showers and thunderstorms.
.WEDNESDAY...North winds around 5 knots, becoming east in the
afternoon. Lake waters smooth. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 5 knots, becoming
northwest after midnight. Lake waters smooth. A chance of showers
and thunderstorms.
.THURSDAY...North winds around 5 knots, becoming south in the
afternoon. Lake waters smooth. A chance of showers and
thunderstorms in the morning, then showers and thunderstorms
likely in the afternoon.
.THURSDAY NIGHT...Southeast winds around 5 knots. Lake waters
smooth. A chance of showers. A chance of thunderstorms, mainly in
the evening.
.FRIDAY...Northeast winds around 5 knots, becoming south 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
chance of showers and thunderstorms in the evening, then a chance
of showers with a slight chance of thunderstorms after midnight.
.SATURDAY...North winds around 5 knots, becoming south in the
afternoon. Lake waters smooth. Showers likely with a chance of
thunderstorms.
.SATURDAY NIGHT...South winds around 5 knots, becoming west after
midnight. Lake waters smooth. A chance of showers with a slight
chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-190700-
Vermilion and West Cote Blanche Bays-
102 PM CDT Mon Aug 18 2025

.TONIGHT...East winds around 5 knots, becoming north around
5 knots late this evening and overnight. Bay waters smooth. A
chance of showers and thunderstorms this evening. A slight chance
of showers and thunderstorms late.
.TUESDAY...Northeast winds around 5 knots, becoming south around
5 knots in the afternoon. Bay waters smooth. A chance of showers
and thunderstorms in the morning, then showers and thunderstorms
likely in the afternoon.
.TUESDAY NIGHT...East winds around 5 knots, becoming northeast
after midnight. Bay waters smooth. A chance of showers and
thunderstorms, mainly in the evening.
.WEDNESDAY...North winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 5 knots, becoming
northwest around 5 knots after midnight. Bay waters smooth. A
chance of showers and thunderstorms.
.THURSDAY...North winds around 5 knots, becoming south in the
afternoon. Bay waters smooth. A chance of thunderstorms. A chance
of showers in the morning, then showers likely in the afternoon.
.THURSDAY NIGHT...South winds around 5 knots. Bay waters smooth.
A chance of showers and thunderstorms.
.FRIDAY...North winds around 5 knots, becoming south in the
afternoon. Bay waters smooth. Showers likely. A chance of
thunderstorms in the morning, then thunderstorms likely in the
afternoon.
.FRIDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth. A chance of showers and thunderstorms in the evening,
then a chance of showers with a slight chance of thunderstorms
after midnight.
.SATURDAY...Northwest winds around 5 knots, becoming southwest in
the afternoon. Bay waters smooth. Showers likely. A chance of
thunderstorms in the morning, then thunderstorms likely in the
afternoon.
.SATURDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth. A chance of showers with a slight chance of
thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-190700-
Atchafalaya and East Cote Blanche Bays-
102 PM CDT Mon Aug 18 2025

.TONIGHT...East winds around 5 knots, becoming north late this
evening and overnight. Bay waters smooth. A chance of showers and
thunderstorms early this evening, then a slight chance of showers
and thunderstorms late this evening. A slight chance of showers
and thunderstorms late.
.TUESDAY...Northeast winds around 5 knots, becoming south around
5 knots in the afternoon. Bay waters smooth. A chance of showers
and thunderstorms in the morning, then showers and thunderstorms
likely in the afternoon.
.TUESDAY NIGHT...Northeast winds around 5 knots. Bay waters
smooth. A chance of showers. A chance of thunderstorms, mainly in
the evening.
.WEDNESDAY...North winds around 5 knots, becoming east in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 5 knots, becoming west
after midnight. Bay waters smooth. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight.
.THURSDAY...Northeast winds around 5 knots, becoming south in the
afternoon. Bay waters smooth. A chance of thunderstorms. A chance
of showers in the morning, then showers likely in the afternoon.
.THURSDAY NIGHT...South winds around 5 knots. Bay waters smooth.
A chance of showers and thunderstorms.
.FRIDAY...South winds around 5 knots. Bay waters smooth. Showers
likely. A chance of thunderstorms in the morning, then
thunderstorms likely in the afternoon.
.FRIDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth. A chance of showers. A slight chance of thunderstorms in
the evening, then a chance of thunderstorms after midnight.
.SATURDAY...West winds around 5 knots. Bay waters smooth. Showers
likely. A chance of thunderstorms in the morning, then
thunderstorms likely in the afternoon.
.SATURDAY NIGHT...West winds around 5 knots. Bay waters smooth. A
chance of showers. A slight chance of thunderstorms in the
evening, then a chance of thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-190700-
Coastal waters from Cameron LA to High Island TX out 20 NM-
102 PM CDT Mon Aug 18 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ452-190700-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
102 PM CDT Mon Aug 18 2025

.TONIGHT...Northwest winds around 5 knots, becoming northeast
late this evening and overnight. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. A chance of showers and
thunderstorms until early morning, then showers and thunderstorms
likely late.
.TUESDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot
at 2 seconds. Showers and thunderstorms likely, mainly in the
morning.
.TUESDAY NIGHT...Southeast winds around 5 knots, becoming
northeast after midnight. Seas 1 foot or less. A chance of
showers and thunderstorms.
.WEDNESDAY...North winds 5 to 10 knots, becoming west in the
afternoon. Seas 1 foot or less. Wave Detail: North 1 foot at
2 seconds. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 5 knots, becoming
northwest after midnight. Seas 1 foot or less. Wave Detail:
Southwest 1 foot at 2 seconds. A chance of showers and
thunderstorms.
.THURSDAY...North winds 5 to 10 knots, becoming southwest in the
afternoon. Seas 1 foot or less. Wave Detail: Northwest 1 foot at
2 seconds. A chance of thunderstorms. Showers likely, mainly in
the morning.
.THURSDAY NIGHT...South winds around 5 knots. Seas 1 foot or
less. A chance of showers with a slight chance of thunderstorms
in the evening, then showers likely with a chance of
thunderstorms after midnight.
.FRIDAY...Southwest winds around 5 knots. Seas 1 foot or less. A
chance of thunderstorms. Showers likely, mainly in the morning.
.FRIDAY NIGHT...South winds around 5 knots. Seas 1 foot or less.
A chance of showers with a slight chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...West winds around 5 knots. Seas 1 foot or less. A
chance of thunderstorms. Showers likely, mainly in the morning.
.SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less. A chance of showers. A slight chance of thunderstorms in
the evening, then a chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-190700-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
102 PM CDT Mon Aug 18 2025

.TONIGHT...Northeast winds around 5 knots. Seas 1 foot or less. A
chance of showers and thunderstorms this evening. A slight chance
of showers and thunderstorms after midnight, then a chance of
showers and thunderstorms late.
.TUESDAY...Northeast winds around 5 knots, becoming southeast
around 5 knots in the afternoon. Seas 1 foot or less. A chance of
showers and thunderstorms.
.TUESDAY NIGHT...Northeast winds around 5 knots. Seas 1 foot or
less. A chance of showers and thunderstorms.
.WEDNESDAY...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 chance of showers and thunderstorms.
.WEDNESDAY NIGHT...South winds around 5 knots, becoming west
after midnight. Seas 1 foot or less. A slight chance of showers
and thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight.
.THURSDAY...North winds around 5 knots, becoming south in the
afternoon. Seas 1 foot or less. A chance of thunderstorms.
Showers likely, mainly in the morning.
.THURSDAY NIGHT...South winds around 5 knots. Seas 1 foot or
less. A chance of showers with a slight chance of thunderstorms
in the evening, then showers likely with a chance of
thunderstorms after midnight.
.FRIDAY...Southwest winds around 5 knots. Seas 1 foot or less. A
chance of thunderstorms. Showers likely, mainly in the morning.
.FRIDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less. A chance of showers with a slight chance of thunderstorms
in the evening, then showers likely with a chance of
thunderstorms after midnight.
.SATURDAY...West winds around 5 knots. Seas 1 foot or less. A
chance of thunderstorms. Showers likely, mainly in the morning.
.SATURDAY NIGHT...Southwest winds around 5 knots. Seas 1 foot or
less. A chance of showers. A slight chance of thunderstorms in
the evening, then a chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-190700-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
102 PM CDT Mon Aug 18 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ472-190700-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
102 PM CDT Mon Aug 18 2025

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

Winds and seas higher in and near thunderstorms.

$$

GMZ475-190700-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
102 PM CDT Mon Aug 18 2025

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

Winds and seas higher in and near thunderstorms.

$$