Coastal Waters Forecast
Issued by NWS Lake Charles, LA

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FZUS54 KLCH 081821
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
120 PM CDT Tue Jul 8 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.

GMZ400-090700-
120 PM CDT Tue Jul 8 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...

Weak surface high will continue to ridge across the northern Gulf
and into the coastal waters this week. This will keep a mainly
light southerly flow in place with relatively low seas. An upper
level disturbance will allow for widespread showers and
thunderstorms over the coastal waters late tonight into tomorrow
morning. Then scattered showers or thunderstorms will be possible
each day through the end of the week.

$$

GMZ430-090700-
Sabine Lake-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds around 5 knots. Lake waters smooth. A
slight chance of showers and thunderstorms early this evening. A
chance of showers and thunderstorms late.
.WEDNESDAY...Southwest winds around 5 knots, increasing to 5 to
10 knots in the afternoon. Lake waters light chop. A chance of
showers and thunderstorms in the morning, then showers and
thunderstorms likely in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop. A slight chance of thunderstorms. A slight chance of
showers in the evening, then a chance of showers after midnight.
.THURSDAY...Southwest winds 5 to 10 knots. Lake waters light
chop. A chance of thunderstorms. Showers likely, mainly in the
morning.
.THURSDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms after
midnight.
.FRIDAY...South winds 5 to 10 knots. Lake waters light chop. A
chance of showers and thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop. A slight 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.
.SATURDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms after
midnight.
.SUNDAY...South winds around 5 knots, increasing to 5 to 10 knots
in the afternoon. Lake waters light chop. Showers likely with a
chance of thunderstorms.
.SUNDAY 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.

$$

GMZ432-090700-
Calcasieu Lake-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds 5 to 10 knots. Lake waters light chop.
A slight chance of showers and thunderstorms early this evening.
A chance of showers and thunderstorms late.
.WEDNESDAY...Southwest winds 5 to 10 knots. Lake waters light
chop. A chance of thunderstorms. A chance of showers in the
morning, then showers likely in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop. A chance of showers and thunderstorms.
.THURSDAY...Southwest winds 5 to 10 knots. Lake waters light
chop. A chance of thunderstorms. Showers likely, mainly in the
morning.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters
light chop. A slight chance of showers and thunderstorms after
midnight.
.FRIDAY...South winds 5 to 10 knots. Lake waters light chop. A
chance of showers and thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop. A slight 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.
.SATURDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms after
midnight.
.SUNDAY...South winds 5 to 10 knots. Lake waters light chop.
Showers likely with a chance of thunderstorms.
.SUNDAY 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.

$$

GMZ435-090700-
Vermilion and West Cote Blanche Bays-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds 5 to 10 knots. Bay waters light chop.
A slight chance of showers and thunderstorms early this evening.
A slight chance of showers and thunderstorms late.
.WEDNESDAY...Southwest winds 5 to 10 knots. Bay waters light
chop. A chance of thunderstorms. A chance of showers in the
morning, then showers likely in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters
light chop. A chance of showers and thunderstorms.
.THURSDAY...Southwest winds 5 to 10 knots. Bay waters light chop.
Showers likely. A chance of thunderstorms in the morning, then
thunderstorms likely in the afternoon.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop. A slight chance of showers and thunderstorms after
midnight.
.FRIDAY...South winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms in the morning, then showers
and thunderstorms likely in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop.
A slight chance of showers and thunderstorms after midnight.
.SATURDAY...South winds 5 to 10 knots. Bay waters light chop.
Showers likely 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 chance of showers and thunderstorms after midnight.
.SUNDAY...South winds around 5 knots. Bay waters smooth. Showers
likely with a chance of thunderstorms.
.SUNDAY 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.

$$

GMZ436-090700-
Atchafalaya and East Cote Blanche Bays-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds around 5 knots. Bay waters smooth. A
slight chance of showers and thunderstorms early this evening. A
slight chance of showers and thunderstorms late.
.WEDNESDAY...Southwest winds 5 to 10 knots. Bay waters light
chop. A chance of thunderstorms. A chance of showers in the
morning, then showers likely in the afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters
light chop. A chance of showers and thunderstorms.
.THURSDAY...Southwest winds 5 to 10 knots. Bay waters light chop.
Showers likely. A chance of thunderstorms in the morning, then
thunderstorms likely in the afternoon.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop. A chance of showers with a slight chance of thunderstorms
after midnight.
.FRIDAY...South winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms in the morning, then showers
and thunderstorms likely in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop.
A slight chance of showers and thunderstorms after midnight.
.SATURDAY...South winds 5 to 10 knots. Bay waters light chop.
Showers likely. A chance of thunderstorms in the morning, then
thunderstorms likely in the afternoon.
.SATURDAY NIGHT...South winds around 5 knots. Bay waters smooth.
A chance of showers with a slight chance of thunderstorms after
midnight.
.SUNDAY...South winds around 5 knots. Bay waters smooth. Showers
likely with a chance of thunderstorms.
.SUNDAY NIGHT...South winds around 5 knots. Bay waters smooth. A
chance of showers with a slight chance of thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-090700-
Coastal waters from Cameron LA to High Island TX out 20 NM-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of showers and
thunderstorms late.
.WEDNESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. Wave Detail: Southwest 2 feet at 3 seconds and south
1 foot at 6 seconds. A slight chance of showers and thunderstorms
in the evening, then a chance of showers and thunderstorms after
midnight.
.THURSDAY...Southwest winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 5 seconds. A slight chance of
showers and thunderstorms after midnight.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 4 seconds. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. A
chance of showers and thunderstorms after midnight.
.SATURDAY...South winds around 10 knots. Seas around 2 feet.
Showers likely with a chance of thunderstorms.
.SATURDAY NIGHT...South winds around 10 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.
.SUNDAY...South winds 5 to 10 knots. Seas around 2 feet. A chance
of thunderstorms. Showers likely, mainly in the morning.
.SUNDAY 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.

$$

GMZ452-090700-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 5 seconds. A chance of showers
and thunderstorms late.
.WEDNESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 5 seconds. A chance of showers
and thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. Wave Detail: Southwest 2 feet at 3 seconds and south
1 foot at 6 seconds. A slight chance of showers and thunderstorms
in the evening, then a chance of showers and thunderstorms after
midnight.
.THURSDAY...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of
showers and thunderstorms after midnight.
.FRIDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds. Showers likely with a
chance of thunderstorms.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. A
chance of showers and thunderstorms after midnight.
.SATURDAY...South winds around 10 knots. Seas around 2 feet. A
chance of thunderstorms. Showers.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
A chance of showers and thunderstorms after midnight.
.SUNDAY...South winds 5 to 10 knots. Seas around 2 feet. A chance
of thunderstorms. Showers likely, mainly in the morning.
.SUNDAY 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.

$$

GMZ455-090700-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
120 PM CDT Tue Jul 8 2025

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

$$

GMZ470-090700-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
120 PM CDT Tue Jul 8 2025

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A chance of showers and
thunderstorms late.
.WEDNESDAY...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of
showers and thunderstorms after midnight.
.THURSDAY...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 5 seconds. A slight chance of
showers and thunderstorms after midnight.
.FRIDAY...South winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 5 seconds. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms after
midnight.
.SATURDAY...South 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.
.SUNDAY...South winds around 10 knots. Seas 2 to 3 feet. A chance
of thunderstorms. Showers likely, mainly in the morning.
.SUNDAY 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.

$$

GMZ472-090700-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
120 PM CDT Tue Jul 8 2025

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 6 seconds. A chance of showers with a
slight chance of thunderstorms late.
.WEDNESDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 6 seconds and southwest
1 foot at 3 seconds. A chance of showers and thunderstorms after
midnight.
.THURSDAY...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of showers and
thunderstorms after midnight.
.FRIDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. Showers likely with a chance
of thunderstorms.
.FRIDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of showers and 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.
.SUNDAY...South winds 5 to 10 knots. Seas around 2 feet. A chance
of thunderstorms. Showers, mainly in the morning.
.SUNDAY 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.

$$

GMZ475-090700-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
120 PM CDT Tue Jul 8 2025

.TONIGHT...Southwest winds around 5 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A slight chance of
showers after midnight. A slight chance of showers and
thunderstorms late.
.WEDNESDAY...Southwest winds around 5 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 6 seconds. A chance of
showers and thunderstorms after midnight.
.THURSDAY...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 5 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.THURSDAY NIGHT...South winds around 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds. A chance of
showers with a slight chance of thunderstorms after midnight.
.FRIDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A chance of thunderstorms.
Showers likely, mainly in the morning.
.FRIDAY NIGHT...Southeast winds around 10 knots. Seas around
2 feet. A chance of showers and thunderstorms after midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. A
chance of thunderstorms. Showers.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
A chance of showers and thunderstorms after midnight.
.SUNDAY...South winds 5 to 10 knots. Seas around 2 feet. A chance
of thunderstorms. Showers, mainly in the morning.
.SUNDAY 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.

$$