How Crowded Is Apostle Islands in May?
May is a quiet month at Apostle Islands National Lakeshore, running about 0.7× the park's average month — roughly 6% of the year's visitors come in May. That puts it between the August peak and the December low. Overall our best-time score rates May as "Good" for a visit. Typical May weather averages a high near 63°F and a low around 41°F, with about 3.5" of precipitation. You'll get about 14.8 hours of daylight to explore.
Frequently Asked Questions
May is quiet at Apostle Islands National Lakeshore (about 0.7× the average month). Our best-time score rates it "Good". The single best month overall is May.
The busiest month is August and the quietest is December. May sits at about 0.7× the park's average, or 6% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.