Surf Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
767
FZUS53 KLOT 210834
SRFLOT
Surf Zone Forecast for Lake Michigan Beaches
National Weather Service Chicago IL
334 AM CDT Fri Aug 21 2026
ILZ006-220845-
Lake-
Including the beaches of Illinois Beach State Park
334 AM CDT Fri Aug 21 2026
.TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........71-75.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms in the afternoon.
High Temperature............In the upper 70s.
Winds.......................Southwest winds 5 to 10 mph, becoming
south 10 to 15 mph in the afternoon.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms, mainly in the evening.
Low Temperature.............In the mid 60s.
Winds.......................Southwest winds 10 to 15 mph, becoming
west after midnight.
.SATURDAY...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Partly cloudy. A slight chance of
showers and thunderstorms in the
afternoon.
High Temperature............In the upper 70s.
Winds.......................Northwest winds 10 to 15 mph.
.SWIM RISK OUTLOOK...
.SATURDAY NIGHT...Moderate swim risk*.
.SUNDAY...Moderate swim risk*.
.SUNDAY NIGHT...Low swim risk*.
.MONDAY...Low swim risk*.
.MONDAY NIGHT...Low swim risk*.
.TUESDAY...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
$$
ILZ103-104-220845-
Northern Cook-Central Cook-
Including the beaches of Chicago Park District
334 AM CDT Fri Aug 21 2026
.TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........71-75.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms late.
High Temperature............In the upper 70s.
Winds.......................Southwest winds 5 to 10 mph, becoming south
10 to 15 mph with gusts up to 20 mph in the
afternoon.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms, mainly in the evening.
Low Temperature.............In the upper 60s.
Winds.......................Southwest winds 10 to 15 mph, becoming
west late.
.SATURDAY...
Swim Risk*..................Moderate.
Wave Height.................2 to 4 feet.
Weather.....................Partly cloudy. A slight chance of
showers and thunderstorms in the
afternoon.
High Temperature............In the upper 70s.
Winds.......................Northwest winds 10 to 15 mph, becoming
north late.
.SWIM RISK OUTLOOK...
.SATURDAY NIGHT...Moderate swim risk*.
.SUNDAY...High swim risk*.
.SUNDAY NIGHT...Moderate swim risk*.
.MONDAY...Low swim risk*.
.MONDAY NIGHT...Low swim risk*.
.TUESDAY...Low swim risk*.
&&
Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.
** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot
$$
INZ001-220845-
Lake-
Including the beaches of Indiana Dunes National Park
334 AM CDT Fri Aug 21 2026
.TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........72-76.
Weather.....................Mostly cloudy. A slight chance of
showers and thunderstorms in the afternoon.
High Temperature............In the upper 70s.
Winds.......................South winds 10 to 15 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms until early morning, then
a slight chance of showers late.
Low Temperature.............In the upper 60s.
Winds.......................Southwest winds 10 to 15 mph.
.SATURDAY...
Swim Risk*..................High.
Wave Height.................2 to 4 feet building to 3 to 6 feet.
Weather.....................Partly cloudy. A slight chance of
showers and thunderstorms late.
High Temperature............In the mid 70s.
Winds.......................Northwest winds 10 to 15 mph with gusts
up to 20 mph, becoming north in the afternoon.
.SWIM RISK OUTLOOK...
.SATURDAY NIGHT...High swim risk*.
.SUNDAY...High swim risk*.
.SUNDAY NIGHT...High swim risk*.
.MONDAY...Low swim risk*.
.MONDAY NIGHT...Low swim risk*.
.TUESDAY...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
$$
INZ002-220845-
Porter-
Including the beaches of Indiana Dunes National Park
334 AM CDT Fri Aug 21 2026
.TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........72-76.
Weather.....................Mostly cloudy. A slight chance of
showers and thunderstorms late.
High Temperature............In the upper 70s.
Winds.......................South winds 10 to 15 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms until early morning, then
a slight chance of showers and
thunderstorms late.
Low Temperature.............In the upper 60s.
Winds.......................Southwest winds 10 to 15 mph.
.SATURDAY...
Swim Risk*..................High.
Wave Height.................3 to 6 feet.
Weather.....................Mostly cloudy, then becoming partly
cloudy. A slight chance of showers and
thunderstorms late.
High Temperature............In the mid 70s.
Winds.......................Northwest winds 10 to 15 mph with gusts
up to 20 mph, becoming north late.
.SWIM RISK OUTLOOK...
.SATURDAY NIGHT...High swim risk*.
.SUNDAY...High swim risk*.
.SUNDAY NIGHT...High swim risk*.
.MONDAY...Low swim risk*.
.MONDAY NIGHT...Low swim risk*.
.TUESDAY...Low swim risk*.
&&
Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.
** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot
$$