![]() ![]() There is limited outdoor recreation during the winter. Be sure to check the Current Conditions in the park before you visit. Average snowfall is around 99 inches a year. Average temperatures during the winter range from 20✯ to 6✯ and into the negatives depending on wind chill. The Apostle Islands National Lakeshore is open year round, however accessing the islands during the winter months can pose many challenges and is not very common due to unstable lake conditions. West Lake Superior Buoy, located 48NM North of Ironwood, Michigan.Weather Station - Devils Island, WI, located on the Devils Island Lighthouse.Sea Caves Watch, Meyers Beach/mainland sea caves wave camera.WISC-Watch, Real time buoy network around the islands, available during the summer.Outer Apostle Islands Weather Forecast, in and around the islands, beyond 5NM from shore.Near Shore Marine Weather Forecast, within 5 nautical miles (NM) of shore.Check for an up-to-date weather on Lake Superior: A Gale Warning is issued when sustained surface winds, or frequent gusts, in the range of 34 knots (39 mph) to 47 knots (54 mph) inclusive, are predicted or occurring.Īs you prepare for your trip, it never hurts to plan for an unexpected weather delay, monitor weather forecasts, and be alert to changing conditions. A Small Craft Advisory is issued by the National Weather Service when sustained winds or frequent gusts are between 22 and 33 knots (25 and 38 mph) inclusive, and/or waves are greater than 4 feet. We do not recommend any travel on Lake Superior during Small Craft Advisories or Gale Warnings. Winds of 30 to 40 knots and 6 to 12 foot seas are possible. Average summer winds blow at from 5 to 20 knots with waves of from one to four feet. Even in late summer, surface temperatures rarely exceed 60 degrees, except in protected bays. Average water temperatures in May and June are only in the 40s. Average lows vary from 40 degrees in May, to the upper 50s in mid-summer, to 50 degrees in September. Boaters and paddlers should monitor marine weather forecasts, check the WISC-Watch buoy network, and be constantly alert to changing conditions.Īverage daytime high temperatures range from 60 degrees Fahrenheit in May, to the upper 80s in mid-summer, to the mid-60s in September. Lake Superior is renowned for its cold temperatures, rough seas, fog, and sudden squalls. ![]()
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