Surf Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
191
FZUS53 KLOT 182042
SRFLOT
Surf Zone Forecast for Lake Michigan Beaches
National Weather Service Chicago IL
342 PM CDT Mon Aug 18 2025
ILZ006-190915-
Lake-
Including the beaches of Illinois Beach State Park
342 PM CDT Mon Aug 18 2025
.REST OF TODAY...
Swim Risk*..................Moderate.
Wave Height.................2 to 4 feet.
Water Temperature...........70-74.
Weather.....................Partly cloudy. A chance of showers and
thunderstorms.
High Temperature............In the lower 80s.
Winds.......................Southeast winds around 10 mph with
gusts up to 20 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly cloudy. Showers likely early in
the evening. A chance of thunderstorms.
A chance of showers in the late evening
and overnight.
Low Temperature.............In the lower 70s.
Winds.......................South winds 5 to 10 mph, becoming
southwest late.
.TUESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A slight chance of
showers and thunderstorms in the
morning.
High Temperature............In the lower 80s.
Winds.......................West 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...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
$$
ILZ103-104-190915-
Northern Cook-Central Cook-
Including the beaches of Chicago Park District
342 PM CDT Mon Aug 18 2025
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Water Temperature...........71-75.
Weather.....................Mostly cloudy. Showers likely and a
chance of thunderstorms.
High Temperature............In the mid 80s.
Winds.......................Southeast winds around 10 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. Showers and
thunderstorms likely early in the
evening, then a chance of showers and
thunderstorms in the late evening and
overnight.
Low Temperature.............In the mid 70s.
Winds.......................South winds 5 to 10 mph.
.TUESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms in the morning. A slight
chance of showers and thunderstorms in
the afternoon.
High Temperature............In the mid 80s.
Winds.......................Southwest winds around 10 mph, becoming
north late.
.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...High swim risk*.
.WEDNESDAY...High swim risk*.
.WEDNESDAY NIGHT...High swim risk*.
.THURSDAY...High swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.
&&
Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.
** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot
$$
INZ001-190915-
Lake-
Including the beaches of Indiana Dunes National Park
342 PM CDT Mon Aug 18 2025
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................Around 1 foot.
Water Temperature...........75-79.
Weather.....................Partly cloudy. A chance of showers and
thunderstorms.
High Temperature............In the upper 80s.
Winds.......................Southeast winds 5 to 10 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................Around 1 foot.
Weather.....................Mostly cloudy. Showers and
thunderstorms likely, mainly in the
evening.
Low Temperature.............In the lower 70s.
Winds.......................South winds 5 to 10 mph.
.TUESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 2 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms, mainly in the morning.
High Temperature............In the lower 80s.
Winds.......................Southwest winds 5 to 10 mph, becoming
north late.
.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...High 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
$$
INZ002-190915-
Porter-
Including the beaches of Indiana Dunes National Park
342 PM CDT Mon Aug 18 2025
.REST OF TODAY...
Swim Risk*..................Low.
Wave Height.................Around 1 foot.
Water Temperature...........75-79.
Weather.....................Partly cloudy. A chance of showers and
thunderstorms.
High Temperature............In the mid 80s.
Winds.......................Southeast winds 5 to 10 mph.
.TONIGHT...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Mostly cloudy. Showers and
thunderstorms likely in the evening,
then a chance of showers and
thunderstorms after midnight. Showers
and thunderstorms likely late.
Low Temperature.............In the lower 70s.
Winds.......................South winds 5 to 10 mph.
.TUESDAY...
Swim Risk*..................Low.
Wave Height.................1 to 3 feet.
Weather.....................Mostly cloudy. A chance of showers and
thunderstorms.
High Temperature............In the lower 80s.
Winds.......................Southwest winds around 10 mph, becoming
north late.
.SWIM RISK OUTLOOK...
.TUESDAY NIGHT...High swim risk*.
.WEDNESDAY...High swim risk*.
.WEDNESDAY NIGHT...High swim risk*.
.THURSDAY...Moderate swim risk*.
.THURSDAY NIGHT...Low swim risk*.
.FRIDAY...Low swim risk*.
&&
Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.
** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/lot
$$