Coastal Waters Forecast
Issued by NWS New Orleans/Baton Rouge, LA

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742
FZUS54 KLIX 171641
CWFLIX

Coastal Waters Forecast
National Weather Service New Orleans LA
1141 AM CDT Sun Aug 17 2025

Pascagoula to Atchafalaya River out to 60 NM

Seas are provided as a range of the average height of the highest
1/3 of the waves...along with the occasional height of the average
highest 10 percent of the waves.

GMZ500-GMZ501-180500-
1141 AM CDT Sun Aug 17 2025

.SYNOPSIS FOR PASCAGOULA TO ATCHAFALAYA RIVER OUT 60 NM...

Expect to see a fairly typical diurnal convective cycle with storms
developing over the Gulf waters during the late night and and early
morning hours, and transitioning farther inland by afternoon.
Showers and thunderstorms will become more numerous late in the week
as a weak frontal boundary stalls just north of the area. Winds will
remain light at 10 knots or less with waves/seas 2 feet or less
outside of thunderstorms.

$$

GMZ530-180500-
Lake Pontchartrain and Lake Maurepas-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...North winds around 5 knots, becoming west. Waves
1 foot or less. A slight chance of showers and thunderstorms.
.TONIGHT...Northwest winds around 5 knots. Waves 1 foot or less. A
slight chance of showers and thunderstorms in the evening.
.MONDAY...Northeast winds around 5 knots, becoming east in the
afternoon. Waves 1 foot or less. A chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...North winds around 5 knots. Waves 1 foot or less. A
slight chance of showers and thunderstorms in the evening.
.TUESDAY...North winds around 5 knots, becoming east in the
afternoon. Waves 1 foot or less. A chance of showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds around 5 knots, becoming west around
5 knots after midnight. Waves 1 foot or less. A slight chance of
showers and thunderstorms in the evening.
.WEDNESDAY...North winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A chance of showers and
thunderstorms in the afternoon.
.WEDNESDAY NIGHT...South winds around 5 knots, becoming west after
midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the evening.
.THURSDAY...West winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.THURSDAY NIGHT...Southwest winds around 5 knots. Waves 1 foot or
less. A chance of showers and thunderstorms in the evening, then a
slight chance of showers after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ534-180500-
Lake Borgne-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...Northeast winds around 5 knots, becoming east
late. Waves 1 foot or less. A slight chance of showers and
thunderstorms late.
.TONIGHT...North winds around 5 knots. Waves 1 foot or less.
.MONDAY...Northeast winds around 5 knots, becoming east in the
afternoon. Waves 1 foot or less. A chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming northwest
after midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the evening.
.TUESDAY...Northeast winds around 5 knots, becoming east in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds 5 to 10 knots, becoming west after
midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the evening.
.WEDNESDAY...North winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Waves 1 foot or less. A slight chance of showers
after midnight.
.THURSDAY...West winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Waves 1 foot or
less. A chance of showers. A chance of thunderstorms, mainly in the
evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ532-180500-
Mississippi Sound-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...Northeast winds around 5 knots, becoming
southeast. Waves 1 foot or less. A slight chance of showers and
thunderstorms late.
.TONIGHT...Southwest winds around 5 knots, becoming north after
midnight. Waves 1 foot or less.
.MONDAY...Northeast winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A chance of showers and
thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds around 5 knots, becoming north after
midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the evening.
.TUESDAY...Northeast winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds 5 to 10 knots, becoming west after
midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the evening.
.WEDNESDAY...North winds around 5 knots, becoming south in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Waves 1 foot or
less. A slight chance of showers and thunderstorms after midnight.
.THURSDAY...West winds around 5 knots, becoming south in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Waves 1 foot or
less. A chance of showers. A chance of thunderstorms, mainly in the
evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ536-538-180500-
Chandeleur Sound-Breton Sound-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...Northeast winds 5 to 10 knots, becoming southeast
late. Waves 1 foot or less.
.TONIGHT...Southwest winds around 5 knots, becoming north after
midnight. Waves 1 foot or less.
.MONDAY...Northeast winds 5 to 10 knots, becoming east in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming north after
midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots, becoming east in the
afternoon. Waves 1 foot or less. A chance of thunderstorms. A chance
of showers.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming west after
midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms.
.WEDNESDAY...North winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Waves 1 foot or less. A slight chance of showers and
thunderstorms after midnight.
.THURSDAY...West winds around 5 knots, becoming south in the
afternoon. Waves 1 foot or less. A chance of showers and
thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Waves 1 foot or
less. A chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ555-557-180500-
Coastal Waters from Boothville LA to Southwest Pass of the
Mississippi River out 20 nm-
Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...Northeast winds 5 to 10 knots, becoming east late.
Seas around 2 feet early, then 1 foot or less. Wave Detail: North
1 foot at 3 seconds, becoming northeast 1 foot at 3 seconds. A
slight chance of showers and thunderstorms early.
.TONIGHT...Northeast winds around 5 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds. A slight chance of showers
and thunderstorms after midnight.
.MONDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds and south 1 foot at 5 seconds.
A chance of showers and thunderstorms, mainly in the morning.
.MONDAY NIGHT...East winds around 5 knots, becoming northeast after
midnight. Seas 1 foot or less. Wave Detail: East 1 foot at
4 seconds. A slight chance of showers and thunderstorms in the
evening, then a chance of showers and thunderstorms after midnight.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 4 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.TUESDAY NIGHT...Southeast winds 5 to 10 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.
.WEDNESDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot at
2 seconds. A chance of showers and thunderstorms, mainly in the
morning.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. A slight chance of showers and thunderstorms after midnight.
.THURSDAY...West winds around 5 knots, becoming south in the
afternoon. Seas 1 foot or less. Wave Detail: Southwest 1 foot at
2 seconds. A chance of showers and thunderstorms.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 2 seconds. 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.

$$

GMZ550-552-180500-
Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA
out 20 nm-
Coastal waters from the Southwest Pass of the Mississippi River to
Port Fourchon Louisiana out 20 NM-
1141 AM CDT Sun Aug 17 2025

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

$$

GMZ575-577-180500-
Coastal Waters from Stake Island LA to Southwest Pass of the
Mississippi River from 20 to 60 nm-
Coastal waters from Pascagoula Mississippi to Stake Island Louisiana
out 20 to 60 NM-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: North 1 foot at 3 seconds and southwest 1 foot at
5 seconds. A chance of showers and thunderstorms early, then a
slight chance of showers and thunderstorms early.
.TONIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds and south 1 foot at 5 seconds.
A slight chance of showers and thunderstorms after midnight.
.MONDAY...Northeast winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less. Wave Detail: North 1 foot at 3 seconds
and south 1 foot at 5 seconds, becoming northeast 1 foot at
3 seconds and south 1 foot at 5 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northeast 1 foot at 4 seconds. A slight chance of
showers and thunderstorms in the evening, then a chance of showers
and thunderstorms after midnight.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 4 seconds. A chance of showers and
thunderstorms, 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...East winds around 5 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.WEDNESDAY NIGHT...South winds around 5 knots. Seas 1 foot or less.
Wave Detail: East 1 foot at 4 seconds. A chance of showers and
thunderstorms after midnight.
.THURSDAY...Southwest winds around 5 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 2 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 2 seconds. 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.

$$

GMZ570-572-180500-
Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya
River LA from 20 to 60 NM-
Coastal waters from Southwest Pass of the Mississippi River to Port
Fourchon Louisiana from 20 to 60 NM-
1141 AM CDT Sun Aug 17 2025

.THIS AFTERNOON...North winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: North 1 foot at 3 seconds and south 1 foot at
5 seconds. A slight chance of showers and thunderstorms.
.TONIGHT...North winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: North 1 foot at 3 seconds and south 1 foot at 5 seconds. A
slight chance of showers and thunderstorms after midnight.
.MONDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds and southeast 1 foot at
5 seconds. A chance of showers and thunderstorms, mainly in the
morning.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds. A slight chance of showers
and thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northeast 1 foot at 3 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.TUESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Northeast 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 4 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.WEDNESDAY NIGHT...Southeast winds around 5 knots. Seas 1 foot or
less. Wave Detail: East 1 foot at 3 seconds. A chance of showers and
thunderstorms after midnight.
.THURSDAY...Southwest winds around 5 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 2 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.THURSDAY NIGHT...South winds around 5 knots. Seas 1 foot or less.
Wave Detail: South 1 foot at 3 seconds. 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.

$$