Surf Forecast
Issued by NWS Chicago, IL

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837
FZUS53 KLOT 311940
SRFLOT

Surf Zone Forecast for Lake Michigan Beaches
National Weather Service Chicago IL
240 PM CDT Thu Jul 31 2025

ILZ006-010915-
Lake-
Including the beaches of Illinois Beach State Park
240 PM CDT Thu Jul 31 2025

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...
Swim Risk*..................High.
Wave Height.................4 to 7 feet.
Water Temperature...........71-75.
Weather.....................Partly cloudy. Areas of smoke.
High Temperature............In the lower 70s.
Winds.......................North winds 15 to 20 mph.

.TONIGHT...
Swim Risk*..................High.
Wave Height.................4 to 7 feet.
Weather.....................Partly cloudy with patchy smoke
                            and sprinkles.
Low Temperature.............In the upper 60s.
Winds.......................Northeast winds 15 to 20 mph, becoming
                            east 10 to 15 mph late.

.FRIDAY...
Swim Risk*..................High.
Wave Height.................3 to 6 feet.
Weather.....................Partly cloudy. Scattered sprinkles
                            until late afternoon.
High Temperature............In the mid 70s.
Winds.......................Northeast winds 10 to 15 mph.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Moderate 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

$$

ILZ103-104-010915-
Northern Cook-Central Cook-
Including the beaches of Chicago Park District
240 PM CDT Thu Jul 31 2025

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...
Swim Risk*..................High.
Wave Height.................4 to 7 feet.
Water Temperature...........73-77.
Weather.....................Partly cloudy. Areas of smoke.
High Temperature............In the lower 70s.
Winds.......................North winds 15 to 20 mph.

.TONIGHT...
Swim Risk*..................High.
Wave Height.................4 to 7 feet.
Weather.....................Partly cloudy with patchy smoke
                            and sprinkles.
Low Temperature.............In the upper 60s.
Winds.......................Northeast winds 15 to 20 mph, becoming
                            east 10 to 15 mph after midnight.

.FRIDAY...
Swim Risk*..................High.
Wave Height.................3 to 6 feet.
Weather.....................Partly cloudy. Scattered sprinkles
                            through early afternoon.
High Temperature............In the mid 70s.
Winds.......................Northeast winds 10 to 15 mph, becoming
                            around 15 mph late.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Moderate 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

$$

INZ001-010915-
Lake-
Including the beaches of Indiana Dunes National Park
240 PM CDT Thu Jul 31 2025

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...
Swim Risk*..................High.
Wave Height.................4 to 7 feet.
Water Temperature...........71-75.
Weather.....................Partly cloudy. Areas of smoke.
High Temperature............In the lower 70s.
Winds.......................North winds 15 to 20 mph.

.TONIGHT...
Swim Risk*..................High.
Wave Height.................3 to 6 feet.
Weather.....................Partly cloudy with patchy smoke
                            and sprinkles.
Low Temperature.............In the mid 60s.
Winds.......................Northeast winds 15 to 20 mph, becoming
                            east 10 to 15 mph after midnight.

.FRIDAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet.
Weather.....................Partly cloudy.
High Temperature............In the mid 70s.
Winds.......................Northeast winds 10 to 15 mph, becoming
                            north late.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Moderate 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

$$

INZ002-010915-
Porter-
Including the beaches of Indiana Dunes National Park
240 PM CDT Thu Jul 31 2025

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...
Swim Risk*..................High.
Wave Height.................4 to 7 feet.
Water Temperature...........71-75.
Weather.....................Partly cloudy. Areas of smoke.
High Temperature............In the lower 70s.
Winds.......................North winds 15 to 20 mph.

.TONIGHT...
Swim Risk*..................High.
Wave Height.................3 to 6 feet.
Weather.....................Partly cloudy with patchy smoke
                            and sprinkles.
Low Temperature.............In the lower 60s.
Winds.......................Northeast winds 15 to 20 mph, becoming
                            east 10 to 15 mph after midnight.

.FRIDAY...
Swim Risk*..................High.
Wave Height.................3 to 5 feet.
Weather.....................Partly cloudy.
High Temperature............In the lower 70s.
Winds.......................Northeast winds 10 to 15 mph, becoming
                            north in the afternoon.

.SWIM RISK OUTLOOK...
.FRIDAY NIGHT...Moderate 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


$$