Dangerous swimming conditions are expected along much of Wisconsin’s Lake Michigan shoreline from Sunday, July 20, into early Monday, July 21. National Weather Service offices have issued beach hazard statements for Door, Kewaunee, Manitowoc, Sheboygan and Ozaukee counties, with visitors told to stay out of the water during the stated windows.
This is not a blanket closure of every Wisconsin beach, and it does not make every hour equally hazardous. The practical decision is to identify the county and start time for the intended stop, keep the visit onshore while the statement is active, and check the latest official alert before returning to the water.
- Five counties: Statements cover Door, Kewaunee, Manitowoc, Sheboygan and Ozaukee along Lake Michigan.
- Two start times: The northern statement starts at 10 AM Sunday, while the Sheboygan and Ozaukee statement starts at 1 PM.
- One end time: Both statements are scheduled to remain in effect through 7 AM CDT Monday, July 21.
- Main danger: High waves and strong currents can quickly pull swimmers away from shore.
- Safest decision: Stay out of the water and away from piers and breakwalls during the applicable window.
Where the Wisconsin beach hazards apply
The National Weather Service Green Bay statement covers Door, Kewaunee and Manitowoc counties from 10 AM Sunday through 7 AM Monday. It warns that high waves and strong currents will create dangerous swimming conditions along the Lake Michigan shoreline.
The statement specifically names Rock Island State Beach, Baileys Harbor beaches and Whitefish Dunes in Door County. It also includes Crescent Beach and City of Kewaunee Beach in Kewaunee County, plus Point Beach, Neshotah Beach and Red Arrow Beach in Manitowoc County.
A separate National Weather Service Milwaukee statement covers Sheboygan and Ozaukee counties from 1 PM Sunday through 7 AM Monday. It forecasts three to five foot waves and life threatening swimming conditions caused by dangerous currents.
Those named beaches are useful reference points, but travelers should not interpret the list as permission to enter the water at another Lake Michigan beach in a covered county. The statements describe shoreline hazards across the affected counties, so the safer choice is to follow the county level warning rather than search for an unnamed exception nearby.
The start time changes by county
Door, Kewaunee and Manitowoc enter the hazard window at 10 AM Sunday. Sheboygan and Ozaukee enter it three hours later at 1 PM, and both statements currently end at 7 AM Monday.
A morning visit in Sheboygan or Ozaukee is not automatically safe simply because the formal statement begins in the afternoon. Forecast timing can change, waves may build before the posted onset, and local beach conditions can differ, so visitors should inspect the current alert and any posted beach restrictions upon arrival.
The end time also deserves a fresh check. Seven in the morning is the scheduled expiration, not a promise that water conditions will immediately become suitable for swimming, paddling or entering from a pier once the clock reaches that hour.
Local status can add another layer to the forecast. The Wisconsin Department of Natural Resources beach advisory page explains that local health departments report current advisories and closings through the state’s Beach Health system, including actions tied to high waves or other safety concerns. Check that local status alongside the NWS statement because either authority may supply the more restrictive instruction for a particular beach.
What dangerous currents mean for a beach plan
Strong currents on the Great Lakes can move water away from shore or along structures with enough force to overwhelm a swimmer. High waves can make the shoreline unpredictable, knock people from rocks or structures and complicate a rescue even when the weather looks pleasant from land.
The Milwaukee office tells visitors to stay out of the water and away from dangerous areas such as piers and breakwalls. That guidance matters for photographers, anglers and walkers as well as swimmers because wave action can reach structures that appear dry between sets.
The Green Bay office similarly directs visitors to remain out of the water to avoid hazardous swimming conditions. Neither statement creates an exception for strong swimmers, quick dips or shallow water, so ability and intended duration should not be used to override the official warning.
Beach visits can stay onshore with limits
A beach stop may still work as an onshore scenic visit where local rules allow access. Travelers can keep distance from the waterline, avoid piers and breakwalls, and follow any instructions from lifeguards, park staff, signs or local officials that are more restrictive than the regional statement.
Families should choose an alternate activity rather than relying on close supervision to make hazardous water safe. A picnic, lighthouse area, inland trail or town stop can preserve part of the day without turning the beach advisory into a judgment call at the shoreline.
Travelers staying overnight can use Deep Arrival’s Door County RV parks and campgrounds guide to compare bases away from the immediate swimming decision. That planning guide does not replace the live weather statement, and every campground or park still requires its own availability and conditions check.
Boaters and paddlers need separate checks
A beach hazard statement is written around shoreline and swimming risk, not as a complete marine forecast for every vessel or launch. Kayakers, paddleboarders and boaters should not treat the absence of vessel instructions in the beach statement as evidence that their planned route is suitable.
Check the current nearshore marine forecast, launch status, small craft headlines and local restrictions for the exact segment of Lake Michigan. If the activity begins from a covered beach or requires crossing breaking waves near shore, the posted dangerous conditions already create a strong reason to postpone.
Conditions can also vary around points, bays, harbor entrances and engineered structures. An apparently calmer patch of water does not cancel a county wide statement, especially when the planned exit depends on returning through surf or currents that may strengthen later.
Decision matrix for July 20 and 21
| Your plan | Current decision and reason |
|---|---|
| Swim at a covered county beach | Stay out of the water because both NWS offices warn of dangerous waves and currents |
| Walk onto a pier or breakwall | Choose an onshore alternative because three to five foot waves can make structures dangerous |
| Visit only for shoreline views | Proceed cautiously if locally allowed, remain back from the water and obey site specific restrictions |
| Launch a kayak or paddleboard | Postpone pending marine checks because the beach statement is not a complete vessel forecast |
| Return after 7 AM Monday | Recheck before entering because the posted expiration can change and conditions may remain hazardous |
- Match county to time: Northern counties begin at 10 AM Sunday, while Sheboygan and Ozaukee begin at 1 PM.
- Keep the visit on land: Swimming, quick wading and water entry remain poor choices during the warning window.
- Avoid exposed structures: Stay off piers and breakwalls where waves can wash across hard surfaces.
- Verify specialist activities: Boating and paddling require the current nearshore forecast and local launch status.
- Check again Monday: Do not assume the scheduled 7 AM expiration guarantees safe water.
Which Wisconsin counties are under the beach hazard statements?
Door, Kewaunee, Manitowoc, Sheboygan and Ozaukee counties are covered along the Lake Michigan shoreline.
When do the Wisconsin beach hazards end?
Both statements are scheduled to end at 7 AM CDT Monday, July 21, but travelers should verify the latest alert before entering the water.
Can travelers still visit the beach without swimming?
An onshore visit may remain possible where local access is open, but visitors should stay back from the water and avoid piers and breakwalls.
Are all Wisconsin Lake Michigan beaches closed?
No statewide closure is stated. The official notices warn of dangerous conditions across five counties, and individual sites may impose their own restrictions.
Is the water safe immediately after the statement expires?
Not necessarily. Forecast timing can change, and waves or currents may remain dangerous, so check current official conditions first.
