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

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Coastal Waters Forecast
National Weather Service New Orleans LA
908 PM CDT Wed May 21 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-GMZ501-221515-
908 PM CDT Wed May 21 2025

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

A cold front will stall or dissipate near the coast allowing winds
to become lighter and more variable in direction through Friday. By
Saturday, more persistent onshore flow will return, and continue into
early next week. The threat for thunderstorms is expected to increase
early next week as well.

$$

GMZ530-221515-
Lake Pontchartrain and Lake Maurepas-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds around 5 knots, becoming
southwest, then becoming northwest around 5 knots late. Waves 1 foot
or less.
.THURSDAY...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.
.THURSDAY NIGHT...South winds around 5 knots, becoming southwest
after midnight. Waves 1 foot or less.
.FRIDAY...Northwest winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...South winds 5 to 10 knots. Waves 1 foot or less.
.SATURDAY...Southeast winds 5 to 10 knots. Waves 1 foot or less,
then around 2 feet in the afternoon.
.SATURDAY NIGHT...South winds 5 to 10 knots. Waves around 2 feet.
.SUNDAY...South winds 5 to 10 knots. Waves around 2 feet. A slight
chance of showers and thunderstorms in the afternoon.
.SUNDAY NIGHT...South winds 5 to 10 knots. Waves around 2 feet.
.MONDAY...South winds 5 to 10 knots. Waves around 2 feet. 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. Waves around 2 feet
in the evening, then 1 foot or less. A chance of thunderstorms. A
chance of showers.

Winds and waves higher in and near thunderstorms.

$$

GMZ534-221515-
Lake Borgne-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds around 5 knots, becoming north
late. Waves 1 foot or less. A slight chance of showers and
thunderstorms late.
.THURSDAY...Northeast winds 5 to 10 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning.
.THURSDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Waves 1 foot or less.
.FRIDAY...Northwest winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...South winds 5 to 10 knots. Waves 1 foot or less.
.SATURDAY...Southeast winds 5 to 10 knots. Waves 1 foot or less,
then around 2 feet in the afternoon.
.SATURDAY NIGHT...South winds around 10 knots. Waves around 2 feet.
.SUNDAY...South winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Waves around 2 feet.
.SUNDAY NIGHT...South winds 10 to 15 knots. Waves around 2 feet.
.MONDAY...South winds around 10 knots. Waves around 2 feet. A slight
chance of showers and thunderstorms in the morning, then a chance of
showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds around 10 knots. Waves around 2 feet
in the evening, then 1 foot or less. A chance of showers. A chance
of thunderstorms, mainly in the evening.

Winds and waves higher in and near thunderstorms.

$$

GMZ532-221515-
Mississippi Sound-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...West winds around 5 knots, becoming northeast.
Waves 1 foot or less. A slight chance of showers and thunderstorms
late.
.THURSDAY...East winds 5 to 10 knots, becoming southeast in the
afternoon. Waves 1 foot or less, then around 2 feet in the
afternoon.
.THURSDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Waves 1 foot or less.
.FRIDAY...Northwest winds around 5 knots, becoming south in the
afternoon. Waves 1 foot or less, then around 2 feet in the
afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Waves 1 to 2 feet.
.SATURDAY...Southeast winds 5 to 10 knots. Waves around 2 feet.
.SATURDAY NIGHT...South winds around 10 knots. Waves around 2 feet.
.SUNDAY...South winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Waves 2 to 3 feet.
.SUNDAY NIGHT...South winds 10 to 15 knots. Waves 2 to 3 feet.
.MONDAY...South winds around 10 knots. Waves around 2 feet. A slight
chance of showers and thunderstorms in the morning, then a chance of
showers and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds around 10 knots. Waves around
2 feet. A chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ536-538-221515-
Chandeleur Sound-Breton Sound-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds around 5 knots, becoming
northeast late. Waves 1 foot or less. A slight chance of showers and
thunderstorms late.
.THURSDAY...Northeast winds 5 to 10 knots, becoming southeast in the
afternoon. Waves 1 foot or less. A slight chance of showers and
thunderstorms in the morning.
.THURSDAY NIGHT...South winds 5 to 10 knots. Waves 1 foot or less.
.FRIDAY...Northwest winds around 5 knots, becoming southeast in the
afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...South winds 5 to 10 knots. Waves around 2 feet.
.SATURDAY...Southeast winds 5 to 10 knots. Waves 1 foot or less,
then around 2 feet in the afternoon.
.SATURDAY NIGHT...South winds 10 to 15 knots. Waves 2 to 3 feet.
.SUNDAY...South winds around 10 knots. Waves 2 to 3 feet.
.SUNDAY NIGHT...South winds 10 to 15 knots. Waves 2 to 3 feet.
.MONDAY...South winds around 10 knots. Waves around 2 feet. A slight
chance of thunderstorms. A slight chance of showers in the morning,
then a chance of showers in the afternoon.
.MONDAY NIGHT...Southwest winds around 10 knots. Waves around
2 feet. A chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ555-557-221515-
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-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds around 5 knots, becoming
southwest late. Seas around 2 feet. Wave Detail: South 2 feet at
5 seconds. A slight chance of showers. A chance of showers with a
slight chance of thunderstorms late.
.THURSDAY...Northeast winds 5 to 10 knots, becoming southeast in the
afternoon. Seas around 2 feet. Wave Detail: South 2 feet at
5 seconds and northeast 1 foot at 2 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.THURSDAY NIGHT...South winds around 5 knots. Seas around 2 feet.
Wave Detail: Southeast 1 foot at 5 seconds.
.FRIDAY...Northwest winds around 5 knots, becoming southeast in the
afternoon. Seas around 2 feet. Wave Detail: South 1 foot at
5 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: South 1 foot at
4 seconds, becoming southeast 1 foot at 4 seconds.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: South 1 foot at 4 seconds.
.SATURDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 3 seconds.
.SUNDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.SUNDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.MONDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds. A slight chance of thunderstorms.
A slight chance of showers in the morning, then a chance of showers
in the afternoon.
.MONDAY NIGHT...South winds around 10 knots. Seas around 2 feet. A
chance of showers with a slight chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ550-552-221515-
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-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds around 5 knots, becoming south
late. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.
A slight chance of showers late this evening and early morning. A
slight chance of thunderstorms, then a chance of showers and
thunderstorms late.
.THURSDAY...Southeast winds around 5 knots. Seas 1 to 2 feet. Wave
Detail: South 2 feet at 6 seconds. A chance of showers and
thunderstorms.
.THURSDAY NIGHT...South winds around 5 knots. Seas 1 to 2 feet. Wave
Detail: Southeast 1 foot at 5 seconds.
.FRIDAY...South winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail:
South 1 foot at 5 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: South 1 foot at 4 seconds.
.SATURDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at
4 seconds.
.SUNDAY...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.SUNDAY NIGHT...South winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 4 seconds.
.MONDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A slight chance of thunderstorms.
A slight chance of showers in the morning, then a chance of showers
in the afternoon.
.MONDAY NIGHT...South winds around 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ575-577-221515-
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-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds around 5 knots, becoming
southwest late. Seas around 2 feet. Wave Detail: South 2 feet at
6 seconds. A slight chance of showers and thunderstorms. A chance of
showers with a slight chance of thunderstorms late.
.THURSDAY...North winds 5 to 10 knots, becoming east in the
afternoon. Seas around 2 feet. Wave Detail: South 2 feet at
5 seconds and northeast 1 foot at 4 seconds. A chance of showers and
thunderstorms.
.THURSDAY NIGHT...South winds around 5 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds and southwest 1 foot at
5 seconds. A slight chance of showers and thunderstorms after
midnight.
.FRIDAY...Northwest winds around 5 knots, becoming east in the
afternoon. Seas around 2 feet. Wave Detail: South 1 foot at
6 seconds. A slight chance of showers and thunderstorms in the
morning.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less, then
around 2 feet after midnight. Wave Detail: Southeast 1 foot at
4 seconds.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: South 1 foot at 4 seconds. A slight chance of showers and
thunderstorms in the afternoon.
.SATURDAY NIGHT...Southeast winds around 10 knots. Seas around
2 feet. Wave Detail: Southeast 2 feet at 3 seconds.
.SUNDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 4 seconds.
.SUNDAY NIGHT...South winds around 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 4 seconds.
.MONDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A slight chance of thunderstorms.
A slight chance of showers in the morning, then a chance of showers
in the afternoon.
.MONDAY NIGHT...South winds around 10 knots. Seas around 2 feet. A
chance of showers with a slight chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ570-572-221515-
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-
908 PM CDT Wed May 21 2025

.REST OF TONIGHT...Southeast winds 5 to 10 knots, becoming south
late. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds. A
slight chance of showers late this evening and early morning, then a
chance of showers with a slight chance of thunderstorms late.
.THURSDAY...Southeast winds around 5 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 7 seconds. A chance of showers and
thunderstorms.
.THURSDAY NIGHT...Southeast winds around 5 knots. Seas around
2 feet. Wave Detail: South 2 feet at 6 seconds. A slight chance of
showers and thunderstorms after midnight.
.FRIDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 1 foot at 6 seconds. A slight chance of showers and
thunderstorms in the morning.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.SATURDAY...Southeast winds around 10 knots. Seas around 2 feet.
Wave Detail: Southeast 2 feet at 5 seconds.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
4 seconds.
.SUNDAY...Southeast winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southeast 3 feet at 5 seconds.
.MONDAY...South winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds. A slight chance of showers
and thunderstorms.
.MONDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$