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FZUS54 KLCH 170534
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
1234 AM CDT Thu Jul 17 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.

GMZ400-171800-
1234 AM CDT Thu Jul 17 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...

The tropical disturbance is not expected to produce much in the
way of wind, and sustained winds are expected to stay below the
20-knot threshold for a Small Craft Advisory. Exercise caution
headlines may be needed, but even that looks marginal right now.
Scattered thunderstorms and reduced visibility due to heavy
rainfall will be the main threats to mariners through the weekend.
Near thunderstorms winds and waves will be locally higher.
Background wave heights will be between 2 and 4 feet.

$$

GMZ430-171800-
Sabine Lake-
1234 AM CDT Thu Jul 17 2025

.TODAY...West winds around 5 knots, becoming southwest around
5 knots late. Lake waters smooth. A slight chance of showers and
thunderstorms late this morning and afternoon.
.TONIGHT...Southwest winds around 5 knots. Lake waters smooth. A
chance of showers and thunderstorms.
.FRIDAY...West winds 5 to 10 knots. Lake waters light chop.
Showers with a chance of thunderstorms in the morning, then
showers and thunderstorms likely in the afternoon.
.FRIDAY NIGHT...Southwest 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...Southwest winds 5 to 10 knots. Lake waters light
chop. A chance of showers and thunderstorms.
.SATURDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.SUNDAY...South winds 5 to 10 knots. Lake waters light chop.
.SUNDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...South winds 5 to 10 knots. Lake waters light chop.
.MONDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-171800-
Calcasieu Lake-
1234 AM CDT Thu Jul 17 2025

.TODAY...Northwest winds around 5 knots, becoming southwest late.
Lake waters smooth. A chance of showers and thunderstorms.
.TONIGHT...West winds around 5 knots. Lake waters smooth. A
chance of showers and thunderstorms in the evening, then showers
and thunderstorms likely after midnight.
.FRIDAY...West winds 5 to 10 knots. Lake waters light chop.
Thunderstorms likely. Showers.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop. A chance of showers. A slight chance of thunderstorms in
the evening, then a chance of thunderstorms after midnight.
.SATURDAY...Southwest winds 5 to 10 knots. Lake waters light
chop. A chance of thunderstorms. Showers likely, mainly in the
morning.
.SATURDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.SUNDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
A slight chance of showers and thunderstorms.
.SUNDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.
.MONDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
A slight chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 5 to 10 knots. Lake waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-171800-
Vermilion and West Cote Blanche Bays-
1234 AM CDT Thu Jul 17 2025

.TODAY...Northwest winds 5 to 10 knots. Bay waters light chop.
Showers likely with a chance of thunderstorms this morning, then
showers and thunderstorms this afternoon.
.TONIGHT...Northwest winds 5 to 10 knots. Bay waters light chop.
Thunderstorms likely. Showers likely.
.FRIDAY...West winds 5 to 10 knots. Bay waters light chop.
Thunderstorms likely. Showers, mainly in the morning.
.FRIDAY NIGHT...Southwest winds around 10 knots. Bay waters light
chop. A chance of showers. A slight chance of thunderstorms in
the evening, then a chance of thunderstorms after midnight.
.SATURDAY...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.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop.
.SUNDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
chance of showers and thunderstorms.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop.
.MONDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
slight chance of showers and thunderstorms in the morning, then a
chance of showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Bay waters light
chop.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-171800-
Atchafalaya and East Cote Blanche Bays-
1234 AM CDT Thu Jul 17 2025

.TODAY...Northwest winds 5 to 10 knots. Bay waters light chop.
Showers, thunderstorms.
.TONIGHT...Northwest winds 5 to 10 knots, becoming west after
midnight. Bay waters light chop. Thunderstorms likely. A chance
of showers in the evening, then showers after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop.
Thunderstorms likely. Showers.
.FRIDAY NIGHT...South winds 5 to 10 knots. Bay waters light chop.
A chance of showers and thunderstorms.
.SATURDAY...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.
.SATURDAY NIGHT...South winds around 5 knots. Bay waters smooth.
A slight chance of showers and thunderstorms after midnight.
.SUNDAY...Southwest winds around 5 knots. Bay waters smooth. A
chance of showers and thunderstorms.
.SUNDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth.
.MONDAY...Southwest winds around 5 knots. Bay waters smooth. A
chance of showers and thunderstorms.
.MONDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-171800-
Coastal waters from Cameron LA to High Island TX out 20 NM-
1234 AM CDT Thu Jul 17 2025

.TODAY...West winds 5 to 10 knots, becoming southwest late. Seas
around 2 feet this morning, then 1 foot or less. Wave Detail:
South 1 foot at 5 seconds, becoming southwest 1 foot at
4 seconds. A slight chance of showers and thunderstorms early
this morning, then a chance of showers and thunderstorms late
this morning. A slight chance of showers and thunderstorms this
afternoon.
.TONIGHT...West 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 with a slight chance of
thunderstorms in the evening, then showers and thunderstorms
likely after midnight.
.FRIDAY...West winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 3 seconds. Showers with thunderstorms
likely in the morning, then a chance of showers and thunderstorms
in the afternoon.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 3 seconds. A slight chance of
showers and thunderstorms in the evening, then a chance of
showers and thunderstorms after midnight.
.SATURDAY...Southwest winds around 10 knots. Seas around 3 feet.
Wave Detail: South 2 feet at 4 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.SATURDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 4 seconds.
.SUNDAY...South winds around 10 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms in the morning.
.SUNDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
.MONDAY...South winds around 10 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms in the morning.
.MONDAY NIGHT...South winds around 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-171800-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
1234 AM CDT Thu Jul 17 2025

.TODAY...West winds 5 to 10 knots. Seas around 2 feet this
morning, then 1 foot or less. Wave Detail: West 1 foot at
4 seconds. A chance of thunderstorms.
.TONIGHT...West winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: West 1 foot at
4 seconds. Showers likely with a chance of thunderstorms in the
evening, then showers with thunderstorms likely after midnight.
.FRIDAY...West winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds. Showers with thunderstorms
likely in the morning, then showers likely with a chance of
thunderstorms in the afternoon.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southwest 2 feet at 4 seconds. 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 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 4 seconds. A chance of
thunderstorms. Showers likely, mainly in the morning.
.SATURDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 5 seconds. A slight chance of
showers and thunderstorms after midnight.
.SUNDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms, mainly in the morning.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms, mainly in the morning.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-171800-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
1234 AM CDT Thu Jul 17 2025

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

$$

GMZ470-171800-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
1234 AM CDT Thu Jul 17 2025

.TODAY...West winds 5 to 10 knots. Seas around 2 feet this
morning, then 1 foot or less. Wave Detail: Southwest 1 foot at
5 seconds, becoming south 1 foot at 5 seconds. A chance of
thunderstorms this morning. A chance of showers. A slight chance
of thunderstorms this afternoon.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet after midnight. Wave Detail: Southwest 1 foot
at 4 seconds. A chance of showers. A slight chance of
thunderstorms in the evening, then a chance of thunderstorms
after midnight.
.FRIDAY...West winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 1 foot at 4 seconds. A chance of thunderstorms.
Showers, mainly in the morning.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 4 feet.
Wave Detail: South 2 feet at 4 seconds. A slight chance of
showers in the evening, then a chance of showers and
thunderstorms after midnight.
.SATURDAY...South winds around 10 knots. Seas 3 to 4 feet. Wave
Detail: South 2 feet at 5 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.SATURDAY NIGHT...South winds around 10 knots. Seas 2 to 4 feet.
Wave Detail: South 2 feet at 6 seconds.
.SUNDAY...South winds 5 to 10 knots. Seas around 2 feet. A slight
chance of showers and thunderstorms in the morning.
.SUNDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
.MONDAY...South winds 5 to 10 knots. Seas around 2 feet. A slight
chance of showers and thunderstorms in the morning.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-171800-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
1234 AM CDT Thu Jul 17 2025

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

$$

GMZ475-171800-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
1234 AM CDT Thu Jul 17 2025

.TODAY...Northwest winds around 10 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 4 seconds. Showers and thunderstorms.
.TONIGHT...Northwest winds around 10 knots, becoming southwest
after midnight. Seas 1 foot or less, then 2 to 3 feet after
midnight. Wave Detail: West 1 foot at 4 seconds, becoming west
2 feet at 4 seconds. Showers likely with a chance of
thunderstorms in the evening, then showers with thunderstorms
likely after midnight.
.FRIDAY...Southwest winds around 10 knots. Seas around 3 feet.
Wave Detail: Southwest 2 feet at 4 seconds. Showers with
thunderstorms likely in the morning, then showers likely with a
chance of thunderstorms in the afternoon.
.FRIDAY NIGHT...South winds around 10 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 2 feet at 5 seconds and west 1 foot at
4 seconds. A slight chance of showers and thunderstorms in the
evening, then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...South winds 5 to 10 knots. Seas around 4 feet. Wave
Detail: Southeast 2 feet at 5 seconds. A chance of thunderstorms.
Showers likely, mainly in the morning.
.SATURDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 4 feet.
Wave Detail: Southeast 2 feet at 6 seconds and southwest 1 foot
at 4 seconds. A slight chance of showers and thunderstorms after
midnight.
.SUNDAY...South winds 5 to 10 knots. Seas around 2 feet. A chance
of showers. A chance of thunderstorms, mainly in the morning.
.SUNDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms after midnight.
.MONDAY...South winds around 5 knots. Seas around 2 feet. A
chance of showers and thunderstorms, mainly in the morning.
.MONDAY NIGHT...South 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.

$$