Coastal Waters Forecast
Issued by NWS Lake Charles, LA

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593
FZUS54 KLCH 202054
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
354 PM CDT Mon Jul 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.

GMZ400-210915-
354 PM CDT Mon Jul 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...

High pressure over the western Gulf will drive westerly winds around
10-15 knots today, with winds increasing from east to west starting
tonight as Tropical Depression Two approaches the area. Look for
winds to increase to the 20-25 kt range by Wednesday over our
eastern waters. Tropical storm conditions will be possible at times
Wednesday night through Friday as the system passes along the
coastline.

$$

GMZ430-210915-
Sabine Lake-
354 PM CDT Mon Jul 20 2026

.THIS AFTERNOON...Southwest winds around 5 knots. Lake waters
smooth.
.TONIGHT...Southwest winds 5 to 10 knots. Lake waters light chop.
.TUESDAY...West winds 5 to 10 knots. Lake waters light chop.
.TUESDAY NIGHT...West winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots, becoming
northwest after midnight. Lake waters light chop. A chance of
showers and thunderstorms in the evening, then a chance of
showers with a slight chance of thunderstorms after midnight.
.THURSDAY...Northeast winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms in the
afternoon.
.THURSDAY NIGHT...South winds 5 to 10 knots, becoming north 20 to
25 knots after midnight. Lake waters very rough. A slight chance
of showers and thunderstorms.
.FRIDAY...Northeast winds 15 to 20 knots, becoming east in the
afternoon. Lake waters rough. A slight chance of showers and
thunderstorms.
.FRIDAY NIGHT...Southeast winds 20 to 25 knots with gusts up to
30 knots, becoming southwest around 5 knots after midnight. Lake
waters very rough. A slight chance of showers and thunderstorms
early in the evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-210915-
Calcasieu Lake-
354 PM CDT Mon Jul 20 2026

.THIS AFTERNOON...Southwest winds 5 to 10 knots. Lake waters
light chop.
.TONIGHT...West winds 5 to 10 knots. Lake waters light chop.
.TUESDAY...West winds 5 to 10 knots. Lake waters light chop.
.TUESDAY NIGHT...West winds 5 to 10 knots. Lake waters light
chop.
.WEDNESDAY...West winds 5 to 10 knots. Lake waters light chop.
.WEDNESDAY NIGHT...West winds 5 to 10 knots, becoming north after
midnight. Lake waters light chop. A chance of thunderstorms in
the evening. A chance of showers. A slight chance of
thunderstorms after midnight.
.THURSDAY...Northeast winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms in the
afternoon.
.THURSDAY NIGHT...Northwest winds 15 to 20 knots, becoming
northeast 20 to 25 knots after midnight. Lake waters very rough.
A slight chance of showers and thunderstorms.
.FRIDAY...East winds 15 to 20 knots, becoming southeast 20 to
25 knots with gusts up to 30 knots in the afternoon. Lake waters
very rough. A slight chance of showers and thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers and thunderstorms early in the
evening. A slight chance of showers and thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-210915-
Vermilion and West Cote Blanche Bays-
354 PM CDT Mon Jul 20 2026

.THIS AFTERNOON...West winds 5 to 10 knots. Bay waters light
chop.
.TONIGHT...West winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots after midnight. Bay waters choppy.
.TUESDAY...Northwest winds 10 to 15 knots. Bay waters choppy. A
slight chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...West winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Bay waters
choppy. A chance of showers and thunderstorms in the evening.
.WEDNESDAY...West winds 10 to 15 knots with gusts up to 20 knots.
Bay waters choppy. A chance of showers and thunderstorms in the
afternoon.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots, becoming west
25 to 30 knots after midnight. Bay waters extremely rough. A
chance of thunderstorms in the evening. A chance of showers. A
slight chance of thunderstorms after midnight.
.THURSDAY...North winds 20 to 25 knots, diminishing to 10 to
15 knots in the afternoon. Bay waters very rough. A slight chance
of showers and thunderstorms in the morning, then a chance of
showers and thunderstorms in the afternoon.
.THURSDAY NIGHT...Southeast winds 20 to 25 knots with gusts up to
30 knots. Bay waters very rough. A chance of showers and
thunderstorms early in the evening, then a slight chance of
showers and thunderstorms late in the evening. A chance of
showers and thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop. A chance of showers and thunderstorms early in the evening.
A slight chance of showers and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-210915-
Atchafalaya and East Cote Blanche Bays-
354 PM CDT Mon Jul 20 2026

.THIS AFTERNOON...West winds 5 to 10 knots. Bay waters light
chop. A slight chance of showers and thunderstorms.
.TONIGHT...West winds 5 to 10 knots, becoming northwest 10 to
15 knots with gusts up to 20 knots after midnight. Bay waters
choppy. A slight chance of showers and thunderstorms early in the
evening.
.TUESDAY...Northwest winds 10 to 15 knots. Bay waters choppy. A
slight chance of showers and thunderstorms in the morning, then a
chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...West winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Bay waters
choppy. Thunderstorms likely with a chance of showers in the
evening, then a slight chance of showers and thunderstorms after
midnight.
.WEDNESDAY...West winds 10 to 15 knots with gusts up to 20 knots.
Bay waters choppy. A slight chance of showers and thunderstorms
in the morning, then a chance of showers and thunderstorms early
in the afternoon. Showers and thunderstorms likely late.
.WEDNESDAY NIGHT...West winds 20 to 25 knots with gusts up to
30 knots, increasing to 25 to 30 knots with gusts up to 40 knots
after midnight. Bay waters extremely rough. Showers likely with a
chance of thunderstorms.
.THURSDAY...Northwest winds 15 to 20 knots, becoming southeast in
the afternoon. Gusts up to 35 knots. Bay waters rough. A chance
of showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds 20 to 25 knots, becoming south
15 to 20 knots after midnight. Bay waters very rough. A chance of
showers and thunderstorms early in the evening, then a slight
chance of showers and thunderstorms late in the evening. A chance
of showers and thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop. A chance of showers and thunderstorms early in the evening.
A slight chance of showers and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-210915-
Coastal waters from Cameron LA to High Island TX out 20 NM-
354 PM CDT Mon Jul 20 2026

.THIS AFTERNOON...Southwest winds 10 to 15 knots with gusts up to
20 knots. Seas around 2 feet. Wave Detail: Southwest 2 feet at
4 seconds.
.TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: West 2 feet at 4 seconds.
.TUESDAY NIGHT...West winds 10 to 15 knots with gusts up to
25 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at
4 seconds.
.WEDNESDAY...West winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds.
.WEDNESDAY NIGHT...West winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at
4 seconds. A chance of showers.
.THURSDAY...North winds 10 to 15 knots, becoming southwest in the
afternoon. Gusts up to 25 knots. Seas 2 to 4 feet. A chance of
showers and thunderstorms early in the morning, then a slight
chance of showers and thunderstorms in the late morning and
afternoon.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots, becoming
northwest 20 to 25 knots after midnight. Seas 2 to 4 feet. A
slight chance of showers and thunderstorms.
.FRIDAY...North winds 15 to 20 knots, becoming southeast in the
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. A slight
chance of showers and thunderstorms.
.FRIDAY NIGHT...South winds 15 to 20 knots with gusts up to
25 knots, becoming southwest 10 to 15 knots after midnight. Seas
3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet
after midnight. A slight chance of showers and thunderstorms
early in the evening. A slight chance of showers and
thunderstorms late.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-210915-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
354 PM CDT Mon Jul 20 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY
THROUGH TUESDAY AFTERNOON...

.THIS AFTERNOON...West winds 10 to 15 knots with gusts up to
20 knots. Seas around 2 feet. Wave Detail: West 2 feet at
4 seconds.
.TONIGHT...West winds 10 to 15 knots with gusts up to 25 knots.
Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots with gusts up to 25 knots.
Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds. A slight
chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...West winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas 2 to 4 feet. Wave Detail: West
4 feet at 5 seconds. A chance of showers with a slight chance of
thunderstorms late in the evening. A slight chance of showers and
thunderstorms late.
.WEDNESDAY...West winds 15 to 20 knots with gusts up to 25 knots.
Seas 2 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A slight
chance of showers and thunderstorms early in the morning. A
slight chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...West winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 3 to 4 feet. Wave Detail:
West 4 feet at 5 seconds. A chance of thunderstorms.
.THURSDAY...Northwest winds 20 to 25 knots. Gusts up to 35 knots
in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. A
chance of showers and thunderstorms early in the morning. A
slight chance of showers and thunderstorms late in the morning,
then a chance of showers and thunderstorms in the afternoon.
.THURSDAY NIGHT...Northwest winds 20 to 25 knots, becoming east
15 to 20 knots after midnight. Seas 4 to 6 feet, occasionally to
8 feet. A chance of showers and thunderstorms early in the
evening, then a slight chance of showers and thunderstorms late
in the evening. A chance of showers and thunderstorms after
midnight.
.FRIDAY...South winds 15 to 20 knots. Seas 2 to 4 feet. A chance
of showers and thunderstorms early in the morning, then a slight
chance of showers and thunderstorms in the late morning and
afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Seas around 2 feet. A slight
chance of showers and thunderstorms early in the evening. A
slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-210915-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
354 PM CDT Mon Jul 20 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY
THROUGH TUESDAY AFTERNOON...

.THIS AFTERNOON...West winds 10 to 15 knots with gusts up to
20 knots. Seas around 2 feet. Wave Detail: West 2 feet at
3 seconds.
.TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: West 2 feet at 3 seconds.
.TUESDAY...Northwest winds 10 to 15 knots with gusts up to
25 knots. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at
3 seconds. A slight chance of showers and thunderstorms until
late afternoon, then a chance of showers and thunderstorms late.
.TUESDAY NIGHT...West winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas 2 to 3 feet. Wave Detail: West
3 feet at 4 seconds. A chance of showers and thunderstorms in the
evening, then a slight chance of showers and thunderstorms after
midnight. A chance of showers and thunderstorms late.
.WEDNESDAY...West winds 15 to 20 knots with gusts up to 30 knots.
Seas 2 to 4 feet. Wave Detail: West 3 feet at 4 seconds. A chance
of thunderstorms. A chance of showers.
.WEDNESDAY NIGHT...West winds 20 to 25 knots with gusts up to
30 knots, increasing to 25 to 30 knots with gusts up to 40 knots
after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave
Detail: West 5 feet at 5 seconds. A chance of thunderstorms.
Showers likely until early morning, then a chance of showers
late.
.THURSDAY...Northwest winds 25 to 30 knots, becoming west 20 to
25 knots in the afternoon. Seas 3 to 5 feet, occasionally to
6 feet. A chance of showers and thunderstorms.
.THURSDAY NIGHT...South winds 20 to 25 knots with gusts up to
35 knots. Seas 2 to 4 feet. A chance of showers and thunderstorms
early in the evening, then a slight chance of showers and
thunderstorms late in the evening. A chance of showers and
thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms until late afternoon, then a
slight chance of showers and thunderstorms late.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms early in the
evening. A slight chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-210915-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
354 PM CDT Mon Jul 20 2026

.THIS AFTERNOON...West winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 4 seconds.
.TONIGHT...West winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: Southwest 2 feet at 4 seconds.
.TUESDAY...West winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds.
.TUESDAY NIGHT...West winds 10 to 15 knots with gusts up to
25 knots. Seas 2 to 4 feet. Wave Detail: Southwest 3 feet at
4 seconds.
.WEDNESDAY...West winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet. Wave Detail: West 4 feet at 5 seconds. A slight
chance of showers and thunderstorms in the late morning and
afternoon.
.WEDNESDAY NIGHT...West winds 10 to 15 knots with gusts up to
25 knots. Seas around 3 feet. Wave Detail: Southwest 3 feet at
5 seconds. A chance of showers. A slight chance of thunderstorms
until early morning, then a chance of thunderstorms late.
.THURSDAY...West winds 10 to 15 knots, becoming southwest 5 to
10 knots in the afternoon. Gusts up to 25 knots. Seas 3 to
4 feet. A chance of showers and thunderstorms until late
afternoon, then a slight chance of showers and thunderstorms
late.
.THURSDAY NIGHT...Southwest winds around 10 knots, becoming west
15 to 20 knots after midnight. Gusts up to 30 knots. Seas 3 to
4 feet. A slight chance of showers and thunderstorms.
.FRIDAY...Southwest winds 10 to 15 knots with gusts up to
30 knots. Seas 3 to 5 feet, occasionally to 6 feet. A slight
chance of showers and thunderstorms.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 4 feet. A
slight chance of showers and thunderstorms early in the evening.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-210915-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
354 PM CDT Mon Jul 20 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY
THROUGH TUESDAY AFTERNOON...

.THIS AFTERNOON...West winds around 10 knots with gusts up to
20 knots. Seas around 2 feet. Wave Detail: West 2 feet at
4 seconds.
.TONIGHT...West winds 10 to 15 knots with gusts up to 25 knots.
Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds.
.TUESDAY...West winds 15 to 20 knots, diminishing to 10 to
15 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: West
4 feet at 5 seconds.
.TUESDAY NIGHT...West winds 15 to 20 knots with gusts up to
30 knots. Seas 3 to 4 feet. Wave Detail: West 4 feet at
5 seconds. A slight chance of showers and thunderstorms late in
the evening. A chance of showers and thunderstorms late.
.WEDNESDAY...West winds 15 to 20 knots with gusts up to 30 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: West
5 feet at 5 seconds. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...West winds 15 to 20 knots with gusts up to
25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
West 5 feet at 5 seconds. Showers likely with a chance of
thunderstorms.
.THURSDAY...West winds 10 to 15 knots with gusts up to 25 knots,
increasing to 20 to 25 knots with gusts up to 40 knots in the
afternoon. Seas 5 to 7 feet, occasionally to 9 feet. A chance of
thunderstorms. Showers likely early in the morning, then a chance
of showers in the late morning and afternoon.
.THURSDAY NIGHT...West winds 25 to 30 knots, becoming southwest
20 to 25 knots after midnight. Seas 5 to 7 feet, occasionally to
9 feet. A slight chance of showers and thunderstorms.
.FRIDAY...Southwest winds 10 to 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet, subsiding to 2 to 3 feet in the
afternoon. A slight chance of showers and thunderstorms.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms early in the
evening. A slight chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-210915-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
354 PM CDT Mon Jul 20 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 1 AM CDT TUESDAY
THROUGH TUESDAY AFTERNOON...

.THIS AFTERNOON...Northwest winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at
4 seconds.
.TONIGHT...West winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Gusts up to 30 knots. Seas 2 to 4 feet.
Wave Detail: West 4 feet at 4 seconds. A slight chance of showers
and thunderstorms late.
.TUESDAY...Northwest winds 15 to 20 knots with gusts up to
30 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
West 5 feet at 5 seconds. A chance of showers and thunderstorms.
.TUESDAY NIGHT...West winds 15 to 20 knots, increasing to 20 to
25 knots after midnight. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: West 6 feet at 5 seconds. A chance of
showers and thunderstorms in the evening, then a slight chance of
showers and thunderstorms after midnight. A chance of showers and
thunderstorms late.
.WEDNESDAY...West winds 20 to 25 knots with gusts up to 30 knots.
Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: West
7 feet at 6 seconds. Showers likely with a chance of
thunderstorms.
.WEDNESDAY NIGHT...West winds 20 to 25 knots with gusts up to
35 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail:
West 8 feet at 6 seconds. Showers likely with a chance of
thunderstorms.
.THURSDAY...West winds 20 to 25 knots with gusts up to 35 knots,
becoming southwest 25 to 30 knots with gusts up to 45 knots in
the afternoon. Seas 6 to 9 feet, occasionally to 11 feet. Showers
and thunderstorms likely, mainly in the morning.
.THURSDAY NIGHT...Southwest winds 20 to 25 knots with gusts up to
35 knots, diminishing to 15 to 20 knots with gusts up to 25 knots
after midnight. Seas 5 to 7 feet, occasionally to 9 feet,
subsiding to 3 to 4 feet after midnight. A chance of showers.
.FRIDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 3 feet. A chance of showers
and thunderstorms until late afternoon, then a slight chance of
showers and thunderstorms late.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms early in the
evening. A slight chance of showers and thunderstorms after
midnight.

Winds and seas higher in and near thunderstorms.

$$