872
FZUS53 KLOT 180928
SRFLOT

Surf Zone Forecast for Lake Michigan Beaches
National Weather Service Chicago IL
428 AM CDT Mon Aug 18 2025

ILZ006-182130-
Lake-
Including the beaches of Illinois Beach State Park
428 AM CDT Mon Aug 18 2025

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 3 PM CDT THIS AFTERNOON...

.TODAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet subsiding to 1 to 3 feet late.
Water Temperature...........70-74.
Weather.....................Mostly cloudy. A slight chance of showers
                            and thunderstorms in the morning, then
                            scattered showers and thunderstorms in the
                            mid to late afternoon.
High Temperature............In the lower 80s.
Winds.......................Southeast winds 10 to 15 mph with gusts
                            up to 25 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly cloudy. Numerous showers and
                            thunderstorms early in the evening,
                            then a chance of showers and
                            thunderstorms in the late evening and
                            overnight.
Low Temperature.............In the lower 70s.
Winds.......................Southeast winds 5 to 10 mph, becoming
                            southwest late.

.TUESDAY...
Swim Risk*..................Low.
Wave Height.................Around 1 foot.
Weather.....................Mostly cloudy. A chance of showers and
                            a slight chance of thunderstorms.
High Temperature............In the lower 80s.
Winds.......................West winds 5 to 10 mph, becoming northeast
                            in the afternoon.

.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...Moderate swim risk*.
.WEDNESDAY...High swim risk*.
.WEDNESDAY NIGHT...High swim risk*.
.THURSDAY...High swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.

&&

Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.

** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot

$$

ILZ103-104-182130-
Northern Cook-Central Cook-
Including the beaches of Chicago Park District
428 AM CDT Mon Aug 18 2025

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 3 PM CDT THIS AFTERNOON...

.TODAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet subsiding to 1 to 3 feet late.
Water Temperature...........72-76.
Weather.....................Mostly cloudy, then becoming partly
                            cloudy. A slight chance of showers
                            and thunderstorms in the morning, then
                            numerous showers and thunderstorms in the
                            mid to late afternoon.
High Temperature............In the mid 80s.
Winds.......................Southeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. Numerous showers and
                            thunderstorms early in the evening,
                            then a chance of showers and
                            thunderstorms in the late evening and
                            overnight.
Low Temperature.............In the lower 70s.
Winds.......................South winds 5 to 10 mph.

.TUESDAY...
Swim Risk*..................Low.
Wave Height.................Around 1 foot.
Weather.....................Mostly cloudy. A chance of showers and
                            thunderstorms, mainly in the morning.
High Temperature............In the mid 80s.
Winds.......................Southwest winds around 10 mph, becoming
                            northeast in the afternoon.

.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...Moderate swim risk*.
.WEDNESDAY...High swim risk*.
.WEDNESDAY NIGHT...High swim risk*.
.THURSDAY...High swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.

&&

Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.

** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot

$$

INZ001-182130-
Lake-
Including the beaches of Indiana Dunes National Park
428 AM CDT Mon Aug 18 2025

.TODAY...
Swim Risk*..................Moderate.
Wave Height.................2 to 4 feet subsiding to 1 to 2 feet.
Water Temperature...........74-78.
Weather.....................Mostly cloudy, then becoming partly
                            cloudy. A slight chance of showers
                            and thunderstorms in the morning, then
                            scattered showers and thunderstorms in the
                            late afternoon.
High Temperature............In the upper 80s.
Winds.......................Southeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Mostly cloudy. Numerous showers and
                            thunderstorms, mainly in the evening.
Low Temperature.............In the lower 70s.
Winds.......................South winds 5 to 10 mph.

.TUESDAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Mostly cloudy. A chance of showers and
                            thunderstorms.
High Temperature............In the lower 80s.
Winds.......................Southwest winds 5 to 10 mph, becoming
                            north in the afternoon.

.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...Moderate swim risk*.
.WEDNESDAY...High swim risk*.
.WEDNESDAY NIGHT...High swim risk*.
.THURSDAY...Moderate swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.

&&

Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.

** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot

$$

INZ002-182130-
Porter-
Including the beaches of Indiana Dunes National Park
428 AM CDT Mon Aug 18 2025

.TODAY...
Swim Risk*..................Moderate.
Wave Height.................2 to 4 feet subsiding to 1 to 2 feet.
Water Temperature...........74-78.
Weather.....................Mostly cloudy, then becoming partly
                            cloudy. A slight chance of showers and
                            thunderstorms until late afternoon,
                            then scattered showers and
                            thunderstorms late.
High Temperature............In the mid 80s.
Winds.......................Southeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Mostly cloudy. Numerous showers and
                            thunderstorms, mainly in the evening.
Low Temperature.............In the lower 70s.
Winds.......................South winds 5 to 10 mph.

.TUESDAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Mostly cloudy. A chance of showers and
                            thunderstorms.
High Temperature............In the lower 80s.
Winds.......................Southwest winds around 10 mph, becoming
                            north late.

.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...Moderate swim risk*.
.WEDNESDAY...High swim risk*.
.WEDNESDAY NIGHT...High swim risk*.
.THURSDAY...Moderate swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.

&&

Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.

** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot


$$