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Mermentau River, LA - Grand Chenier Coastal Forecast

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Coastal Waters Forecast
National Weather Service Lake Charles LA
343 AM CST Wed Feb 26 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.

GMZ400-262230-
343 AM CST Wed Feb 26 2025

.SYNOPSIS...

Light onshore winds will prevail today and tonight ahead of
a dry cold front that will push through the coastal waters
Thursday. Offshore flow becomes reestablished in the wake of the
front Thursday afternoon through Friday morning before turning
onshore again this weekend.

$$

GMZ430-262230-
Sabine Lake-
343 AM CST Wed Feb 26 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING...

.TODAY...South winds 5 to 10 knots. Lake waters light chop.
Widespread dense fog early this morning.
.TONIGHT...Southeast winds 5 to 10 knots, becoming northeast
after midnight. Lake waters light chop. Patchy fog.
.THURSDAY...North winds 5 to 10 knots. Lake waters light chop.
Patchy fog in the morning.
.THURSDAY NIGHT...North winds 5 to 10 knots. Lake waters light
chop.
.FRIDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Lake waters smooth.
.FRIDAY NIGHT...South winds around 5 knots, becoming southwest
around 5 knots after midnight. Lake waters smooth.
.SATURDAY...Northwest winds around 5 knots, becoming south in the
afternoon. Lake waters light chop.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Lake waters
light chop.
.SUNDAY...East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Lake waters choppy.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Lake waters
choppy.

$$

GMZ432-262230-
Calcasieu Lake-
343 AM CST Wed Feb 26 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING...

.TODAY...South winds 5 to 10 knots. Lake waters light chop.
Widespread dense fog early this morning.
.TONIGHT...Southeast winds 5 to 10 knots, becoming northeast
after midnight. Lake waters light chop. Patchy fog.
.THURSDAY...North winds 5 to 10 knots. Lake waters light chop.
Patchy fog in the morning.
.THURSDAY NIGHT...North winds 5 to 10 knots. Lake waters light
chop.
.FRIDAY...Northeast winds 5 to 10 knots, becoming south in the
afternoon. Lake waters light chop.
.FRIDAY NIGHT...South winds 5 to 10 knots, becoming west after
midnight. Lake waters light chop.
.SATURDAY...Northwest winds around 5 knots, becoming south in the
afternoon. Lake waters light chop.
.SATURDAY NIGHT...South winds 5 to 10 knots, becoming southeast
after midnight. Lake waters light chop.
.SUNDAY...East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Lake waters choppy.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Lake waters
choppy.

$$

GMZ435-262230-
Vermilion and West Cote Blanche Bays-
343 AM CST Wed Feb 26 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING...

.TODAY...Southeast winds around 5 knots, increasing to 5 to
10 knots late this morning and afternoon. Bay waters light chop.
Widespread dense fog early this morning, then areas of dense fog
late this morning.
.TONIGHT...East winds around 5 knots. Bay waters smooth. Patchy
fog after midnight.
.THURSDAY...North winds 5 to 10 knots. Bay waters light chop.
Patchy fog in the morning.
.THURSDAY NIGHT...North winds 5 to 10 knots. Bay waters light
chop.
.FRIDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Bay waters light chop.
.FRIDAY NIGHT...South winds around 5 knots in the evening,
becoming light and variable. Bay waters smooth.
.SATURDAY...North winds around 5 knots, becoming south around
5 knots in the afternoon. Bay waters smooth.
.SATURDAY NIGHT...South winds around 5 knots, becoming east after
midnight. Bay waters smooth.
.SUNDAY...East winds 5 to 10 knots, becoming southeast in the
afternoon. Bay waters light chop.
.SUNDAY NIGHT...Southeast winds around 10 knots. Bay waters light
chop.

$$

GMZ436-262230-
Atchafalaya and East Cote Blanche Bays-
343 AM CST Wed Feb 26 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING...

.TODAY...Southeast winds around 5 knots, increasing to 5 to
10 knots this afternoon. Bay waters light chop. Widespread dense
fog early this morning, then areas of dense fog late this
morning.
.TONIGHT...East winds around 5 knots. Bay waters smooth. Patchy
fog after midnight.
.THURSDAY...North winds around 5 knots. Bay waters smooth. A
slight chance of showers in the morning. Patchy fog in the
morning.
.THURSDAY NIGHT...North winds 5 to 10 knots. Bay waters light
chop.
.FRIDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Bay waters light chop.
.FRIDAY NIGHT...South winds around 5 knots, becoming northwest
after midnight. Bay waters smooth.
.SATURDAY...Northeast winds around 5 knots, becoming southwest
around 5 knots in the afternoon. Bay waters smooth.
.SATURDAY NIGHT...South winds around 5 knots, becoming east after
midnight. Bay waters smooth.
.SUNDAY...East winds 5 to 10 knots. Bay waters light chop.
.SUNDAY NIGHT...Southeast winds around 10 knots. Bay waters light
chop.

$$

GMZ450-262230-
Coastal waters from Cameron LA to High Island TX out 20 NM-
343 AM CST Wed Feb 26 2025

.TODAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 1 foot at 3 seconds. Patchy fog early this
morning.
.TONIGHT...Southeast winds 5 to 10 knots, becoming east after
midnight. Seas around 2 feet. Wave Detail: South 1 foot at
4 seconds. Patchy fog after midnight.
.THURSDAY...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: East 1 foot at 4 seconds and south 1 foot at
5 seconds. Patchy fog in the morning.
.THURSDAY NIGHT...Northeast winds around 10 knots. Seas around
2 feet. Wave Detail: Northeast 2 feet at 3 seconds and south
1 foot at 5 seconds.
.FRIDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Seas around 2 feet. Wave Detail: East 2 feet at
4 seconds and south 1 foot at 6 seconds.
.FRIDAY NIGHT...South winds around 5 knots, becoming southwest
around 5 knots after midnight. Seas around 2 feet in the evening,
then 1 foot or less. Wave Detail: Southeast 1 foot at 5 seconds.
.SATURDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Seas 1 foot or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

$$

GMZ452-262230-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
343 AM CST Wed Feb 26 2025

.TODAY...Southeast winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet this afternoon. Wave Detail: South 1 foot at
3 seconds, becoming southeast 1 foot at 3 seconds. Patchy fog
early this morning.
.TONIGHT...Southeast winds 5 to 10 knots, becoming east after
midnight. Seas around 2 feet. Wave Detail: South 1 foot at
4 seconds. Patchy fog after midnight.
.THURSDAY...North winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 1 foot at 4 seconds and southwest 1 foot at
5 seconds. A slight chance of showers in the morning. Patchy fog
in the morning.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas around
2 feet. Wave Detail: North 2 feet at 3 seconds and southwest
1 foot at 5 seconds.
.FRIDAY...Northeast winds around 10 knots, becoming southeast in
the afternoon. Seas around 2 feet. Wave Detail: Northeast 2 feet
at 3 seconds and south 1 foot at 6 seconds.
.FRIDAY NIGHT...South winds around 5 knots, becoming west after
midnight. Seas around 2 feet in the evening, then 1 foot or less.
Wave Detail: Southeast 1 foot at 3 seconds and south 1 foot at
6 seconds.
.SATURDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Seas 1 foot or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
A slight chance of showers.

$$

GMZ455-262230-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
343 AM CST Wed Feb 26 2025

.TODAY...Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Southeast 1 foot at 2 seconds. Widespread dense fog early
this morning. Areas of dense fog late this morning.
.TONIGHT...East winds around 5 knots. Seas 1 foot or less. Wave
Detail: Southeast 1 foot at 4 seconds. Patchy fog after midnight.
.THURSDAY...North winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Southeast 1 foot at 4 seconds. Patchy fog in the morning.
A slight chance of showers.
.THURSDAY NIGHT...North winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: North 1 foot at 3 seconds.
.FRIDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Seas 1 to 2 feet. Wave Detail: Northeast 1 foot at
2 seconds.
.FRIDAY NIGHT...South winds around 5 knots, becoming northwest
after midnight. Seas 1 foot or less. Wave Detail: Southeast
1 foot at 3 seconds.
.SATURDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Seas 1 foot or less.
.SATURDAY NIGHT...South winds around 5 knots, becoming east after
midnight. Seas 1 foot or less.
.SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas around 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
A slight chance of showers after midnight.

$$

GMZ470-262230-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
343 AM CST Wed Feb 26 2025

.TODAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 1 foot at 4 seconds and southeast 1 foot at
7 seconds. Patchy fog early this morning.
.TONIGHT...Southeast winds 5 to 10 knots, becoming east after
midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at
6 seconds. Patchy fog after midnight.
.THURSDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 3 seconds and south 2 feet at
6 seconds. Patchy fog in the morning.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: East 3 feet at 5 seconds and south 2 feet at
6 seconds.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots, becoming east 5 to 10 knots in the afternoon. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 6 seconds.
.FRIDAY NIGHT...South winds around 5 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 6 seconds.
.SATURDAY...Northeast winds around 5 knots. Seas 1 foot or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.

$$

GMZ472-262230-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
343 AM CST Wed Feb 26 2025

.TODAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 3 seconds and southeast 1 foot at
6 seconds. Patchy fog early this morning.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. Patchy fog after midnight.
.THURSDAY...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Northeast 2 feet at 3 seconds and south 2 feet at
6 seconds. A slight chance of showers in the morning.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: Northeast 3 feet at 4 seconds and south
2 feet at 6 seconds.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots, becoming east 5 to 10 knots in the afternoon. Seas 2 to
3 feet. Wave Detail: Northeast 3 feet at 4 seconds and southwest
1 foot at 6 seconds.
.FRIDAY NIGHT...Southeast winds around 5 knots, becoming
northeast after midnight. Seas around 2 feet. Wave Detail:
Southeast 1 foot at 5 seconds. A slight chance of showers after
midnight.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms in the morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds around 15 knots. Seas 3 to
4 feet. A slight chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-262230-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
343 AM CST Wed Feb 26 2025

.TODAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 3 seconds and southeast 2 feet at
6 seconds. Areas of dense fog early this morning.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds.
.THURSDAY...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds and southwest 1 foot
at 6 seconds. A chance of showers, mainly in the morning.
.THURSDAY NIGHT...North winds 10 to 15 knots, becoming northeast
15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail:
North 3 feet at 4 seconds and south 2 feet at 6 seconds.
.FRIDAY...Northeast winds 15 to 20 knots, becoming east 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Northeast 3 feet at 4 seconds and southwest 1 foot at 7 seconds.
.FRIDAY NIGHT...Southeast winds around 5 knots, becoming
northeast after midnight. Seas around 2 feet. Wave Detail: East
2 feet at 4 seconds and southwest 1 foot at 6 seconds. A slight
chance of showers.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms in the morning.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less,
then around 2 feet after midnight.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 3 to 4 feet. A slight chance
of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$


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