A Dense Fog Advisory is in place over the open waters of Lake Michigan this Memorial Day morning, with fog likely to drift into parts of the Milwaukee lakefront through 10 a.m. CDT on Monday, May 25, 2026. Once the murk burns off, the holiday flips to a classic late-May afternoon: mostly sunny, warm, and breezy, with highs around 78–80°F and southerly winds of 5–15 mph.
Fog and Lake Hazards
The advisory covers the open lake and could bring pockets of very limited visibility for early commuters and small‑craft boaters, so expect a slow, low-visibility start on and near the water. On top of that, a Moderate Swim Risk is on the board this afternoon and evening for Lake Michigan beaches in Sheboygan and Ozaukee counties, which means stronger surf near the shore and likely lifeguard warnings. These hazards are outlined by the National Weather Service Milwaukee/Sullivan.
Afternoon Warmth and Timing
By late morning, most neighborhoods should watch the fog thin out as the sun takes over. Highs will climb to around 78–80°F across most of the metro, with slightly cooler readings hugging the immediate lakeshore. Southerly winds of 5–15 mph will relax tonight as temperatures slip into the low 60s, and Tuesday is poised to turn even warmer, with inland areas likely reaching into the mid‑80s.
Midweek Shift and What to Watch
Wednesday brings a plot twist as a backdoor cold front slides south across Lake Michigan, kicking up gusty northeast winds and delivering a noticeable cooldown near the lake, where highs may drop into the 60s. Showers and a few thunderstorms are possible Wednesday afternoon, with coverage in the 20–50 percent range, so keep a backup plan in mind for outdoor events. More details and updates are available from the National Weather Service Milwaukee/Sullivan.
Tips for Beachgoers and Boaters
If you are headed toward the lakefront this morning, give yourself extra time and hold off on small‑craft departures until visibility improves. Lifeguards, beach flags, and park staff will update swim conditions later in the day; when in doubt, stay out of the surf. For most of Milwaukee, the holiday shapes up to be pleasant once the fog clears, so sunscreen, water, and a little patience with the morning gray should go a long way.
