628
FZUS53 KLOT 210820
SRFLOT

Surf Zone Forecast for Lake Michigan Beaches
National Weather Service Chicago IL
320 AM CDT Thu Aug 21 2025

ILZ006-212130-
Lake-
Including the beaches of Illinois Beach State Park
320 AM CDT Thu Aug 21 2025

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.TODAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet subsiding to 2 to 4 feet
                            in the afternoon.
Water Temperature...........70-74.
Weather.....................Partly cloudy, then becoming mostly
                            sunny.
High Temperature............In the mid 70s.
Winds.......................Northeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly clear.
Low Temperature.............In the mid 60s.
Winds.......................North winds 10 to 15 mph, becoming
                            northwest around 5 mph late.

.FRIDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Partly cloudy.
High Temperature............In the upper 70s.
Winds.......................Variable at 5 mph.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...Low swim risk*.
.SATURDAY NIGHT...Low swim risk*.
.SUNDAY...Low swim risk*.
.SUNDAY NIGHT...Low swim risk*.
.MONDAY...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

$$

ILZ103-104-212130-
Northern Cook-Central Cook-
Including the beaches of Chicago Park District
320 AM CDT Thu Aug 21 2025

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.TODAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet subsiding to 2 to 4 feet
                            in the afternoon.
Water Temperature...........67-71.
Weather.....................Partly cloudy, then becoming mostly
                            sunny.
High Temperature............In the lower 70s.
Winds.......................Northeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly clear.
Low Temperature.............In the upper 60s.
Winds.......................Northeast winds 10 to 15 mph, becoming
                            north around 5 mph late.

.FRIDAY...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly sunny, then becoming partly
                            cloudy.
High Temperature............In the upper 70s.
Winds.......................Variable at 5 mph.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...Low swim risk*.
.SATURDAY NIGHT...Low swim risk*.
.SUNDAY...Low swim risk*.
.SUNDAY NIGHT...Low swim risk*.
.MONDAY...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

$$

INZ001-212130-
Lake-
Including the beaches of Indiana Dunes National Park
320 AM CDT Thu Aug 21 2025

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.TODAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet subsiding to 2 to 4 feet
                            in the afternoon.
Water Temperature...........73-77.
Weather.....................Mostly cloudy, then becoming partly
                            cloudy.
High Temperature............In the lower 70s.
Winds.......................Northeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly clear.
Low Temperature.............In the mid 60s.
Winds.......................Northeast winds 10 to 15 mph, becoming
                            north around 5 mph late.

.FRIDAY...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly sunny.
High Temperature............In the upper 70s.
Winds.......................Variable at 5 mph.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...Low swim risk*.
.SATURDAY NIGHT...Low swim risk*.
.SUNDAY...Low swim risk*.
.SUNDAY NIGHT...Low swim risk*.
.MONDAY...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

$$

INZ002-212130-
Porter-
Including the beaches of Indiana Dunes National Park
320 AM CDT Thu Aug 21 2025

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.TODAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet subsiding to 2 to 4 feet
                            in the afternoon.
Water Temperature...........73-77.
Weather.....................Mostly cloudy, then becoming partly
                            cloudy.
High Temperature............In the lower 70s.
Winds.......................Northeast winds 10 to 15 mph.

.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly clear.
Low Temperature.............In the mid 60s.
Winds.......................Northeast winds 10 to 15 mph,
                            diminishing to around 5 mph late.

.FRIDAY...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly sunny.
High Temperature............In the upper 70s.
Winds.......................Variable at 5 mph.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...Low swim risk*.
.SATURDAY NIGHT...Moderate swim risk*.
.SUNDAY...Moderate swim risk*.
.SUNDAY NIGHT...Moderate swim risk*.
.MONDAY...Moderate 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


$$