Surf Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
660
FZUS53 KLOT 181957
SRFLOT
Surf Zone Forecast for Lake Michigan Beaches
National Weather Service Chicago IL
257 PM CDT Tue Aug 18 2026
ILZ006-192000-
Lake-
Including the beaches of Illinois Beach State Park
257 PM CDT Tue Aug 18 2026
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........71-75.
Weather.....................Mostly cloudy. A slight chance of
showers and thunderstorms early in the
afternoon, then a chance of showers and
thunderstorms late.
High Temperature............In the lower 80s.
Winds.......................Southwest winds 10 to 15 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. Showers likely and a
chance of thunderstorms in the evening,
then a slight chance of showers and
thunderstorms after midnight.
Low Temperature.............In the mid 60s.
Winds.......................Southwest winds 5 to 10 mph, becoming
northwest late.
.WEDNESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A slight chance of
showers and thunderstorms late.
High Temperature............In the mid 70s.
Winds.......................North winds 5 to 10 mph, becoming
northeast in the afternoon.
.SWIM RISK OUTLOOK...
.WEDNESDAY NIGHT...Low swim risk*.
.THURSDAY...Low swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...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
$$
ILZ103-104-192000-
Northern Cook-Central Cook-
Including the beaches of Chicago Park District
257 PM CDT Tue Aug 18 2026
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........71-75.
Weather.....................Mostly cloudy. A slight chance of
showers early in the afternoon, then a
chance of showers and a slight chance
of thunderstorms late.
High Temperature............In the lower 80s.
Winds.......................Southwest winds 10 to 15 mph with gusts
up to 25 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. Showers likely in the
evening. A chance of thunderstorms. A
chance of showers after midnight.
Low Temperature.............In the upper 60s.
Winds.......................West winds 5 to 10 mph.
.WEDNESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A slight chance of
showers and thunderstorms late.
High Temperature............In the mid 70s.
Winds.......................Northwest winds 5 to 10 mph, becoming
northeast in the afternoon.
.SWIM RISK OUTLOOK...
.WEDNESDAY NIGHT...Low swim risk*.
.THURSDAY...Low swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...Low swim risk*.
&&
Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.
** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot
$$
INZ001-192000-
Lake-
Including the beaches of Indiana Dunes National Park
257 PM CDT Tue Aug 18 2026
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........72-76.
Weather.....................Mostly cloudy.
High Temperature............In the lower 80s.
Winds.......................Southwest winds around 10 mph with
gusts up to 20 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A chance of
thunderstorms until early morning. A
chance of showers. A slight chance of
thunderstorms late.
Low Temperature.............In the upper 60s.
Winds.......................Southwest winds 5 to 10 mph.
.WEDNESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy.
High Temperature............In the mid 70s.
Winds.......................Northwest winds 5 to 10 mph, becoming
northeast in the afternoon.
.SWIM RISK OUTLOOK...
.WEDNESDAY NIGHT...Low swim risk*.
.THURSDAY...Low swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...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
$$
INZ002-192000-
Porter-
Including the beaches of Indiana Dunes National Park
257 PM CDT Tue Aug 18 2026
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Water Temperature...........72-76.
Weather.....................Mostly cloudy.
High Temperature............In the lower 80s.
Winds.......................Southwest winds around 10 mph with
gusts up to 20 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A chance of
thunderstorms until early morning. A
chance of showers. A slight chance of
thunderstorms late.
Low Temperature.............In the upper 60s.
Winds.......................Southwest winds 5 to 10 mph.
.WEDNESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy.
High Temperature............In the mid 70s.
Winds.......................West winds 5 to 10 mph, becoming
northeast late.
.SWIM RISK OUTLOOK...
.WEDNESDAY NIGHT...Low swim risk*.
.THURSDAY...Low swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.
.FRIDAY NIGHT...Low swim risk*.
.SATURDAY...Moderate swim risk*.
&&
Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.
** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot
$$