Visitation · National Park

Isle Royale National Park visitation by month and year

August is the busiest month at Isle Royale, when the average temperature nearby is 63 degrees. January is the quietest, and the average temperature then is 11 degrees. The crowd arrives with the warm weather and leaves with it. Annual visits rose 10.2 percent from 26,410 in 2019 to 29,091 in 2025.

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Visits by month, with temperature and precipitation

Bars are the average recreation visits in each month over 2021 to 2025. The line is the average temperature at Grand Portage, 40 miles from the park's reference point at 730 feet, station USC00213296 in the NOAA 1991 to 2020 climate normals. The lower panel is monthly rain and snow from the same station, also 1991 to 2020 averages.

Annual visits, 1979 to 2025

Recreation visits per calendar year. A year with a missing month is left blank rather than estimated.

The last ten years

Year	Recreation visits	Change on prior year
2025	29,091	+1.0%
2024	28,806	-0.5%
2023	28,965	+13.8%
2022	25,454	-1.5%
2021	25,844	+298.0%
2020	6,493	-75.4%
2019	26,410	+2.4%
2018	25,798	-8.5%
2017	28,196	+12.9%
2016	24,966	+33.6%

Visitation at other parks

Sleeping Bear Dunes National Lakeshore Pictured Rocks National Lakeshore Great Smoky Mountains National Park Zion National Park

Compare Isle Royale with Voyageurs National Park

Source: NPS Visitor Use Statistics, monthly recreation visits, as compiled for Publicopia Labs. A year is shown only when all twelve months were reported. Temperature, precipitation and snowfall normals are the 1991 to 2020 monthly averages published by NOAA NCEI for station USC00213296, 730 feet above sea level. Data refreshed October 14, 2026.