SXUS43 KMQT 162102 RECMQT MIZ001-170800- Recreational Forecast for Isle Royale National Park National Weather Service Marquette MI 502 PM EDT Thu Apr 16 2026 Isle Royale (SW areas)- Including Greenstone Ridge South, Little Todd Harbor, Minong Ridge, and Windigo- ...FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING... .TONIGHT...Patchy fog. A 20 percent chance of rain and snow showers late. Mostly cloudy. Lows around 35. East winds 5 to 15 mph. Waves calm to 1 foot building to 1 to 2 feet. .FRIDAY...Patchy fog through early afternoon. A 50 percent chance of rain showers and thunderstorms by mid afternoon. Mostly cloudy. Highs around 49 at the shore and 54 to 59 inland. East winds 5 to 15 mph becoming north late. Waves 1 to 2 feet. .FRIDAY NIGHT...Rain showers and a chance of thunderstorms through midnight, then a slight chance of rain showers, snow showers and sleet late. Mostly cloudy. Snow accumulation less than one inch. Lows around 28. Northwest winds 5 to 15 mph. Chance of precipitation 80 percent. Waves building to 3 to 5 feet. .SATURDAY...Breezy. Much colder. Mostly cloudy. Highs around 33. West winds 10 to 20 mph. Waves building to 4 to 7 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 24. Northwest winds 10 to 20 mph. Waves 4 to 7 feet. .SUNDAY...Partly sunny through early afternoon then clearing. Highs around 36. .SUNDAY NIGHT...Mostly clear. Lows around 27. .MONDAY...Mostly sunny through early afternoon then becoming partly sunny. Highs around 42. .MONDAY NIGHT...Mostly cloudy. Lows around 37. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 45. Lows around 34. .WEDNESDAY...Sunny. Highs around 43. .WEDNESDAY NIGHT...Partly cloudy. Lows around 35. .THURSDAY...Partly sunny. Highs around 43. && Isle Royale (NE areas)- Including Greenstone Ridge North, Malone Bay, Mount Saginaw, and Rock Harbor- ...FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING... .TONIGHT...Patchy fog through midnight. Areas of dense fog late. A 20 percent chance of rain and snow showers late. Mostly cloudy. Lows around 35. East winds 5 to 15 mph. Waves calm to 1 foot building to 2 to 4 feet. .FRIDAY...Areas of dense fog through early afternoon. A chance of rain showers and a slight chance of thunderstorms by mid afternoon. Mostly cloudy. Highs around 47 at the shore and 49 to 54 inland. East winds 10 to 20 mph becoming southeast by mid afternoon. Chance of precipitation 50 percent. Waves building to 4 to 7 feet. .FRIDAY NIGHT...Rain showers and a chance of thunderstorms through midnight, then a slight chance of rain showers, freezing rain and sleet late. Mostly cloudy. Snow accumulation less than one inch. Lows around 29. Southwest winds 10 to 20 mph becoming west late. Chance of precipitation 80 percent. Waves 4 to 7 feet. .SATURDAY...Breezy. Much colder. Partly sunny. Highs around 33. West winds 10 to 20 mph. Waves building to 4 to 7 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 24. Northwest winds 10 to 20 mph. Waves subsiding to 2 to 4 feet. .SUNDAY...Partly sunny through early afternoon then clearing. Highs around 34. .SUNDAY NIGHT...Mostly clear. Lows around 29. .MONDAY...Mostly sunny through early afternoon then becoming partly sunny. Highs around 41. .MONDAY NIGHT...Mostly cloudy. Lows around 37. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 44. Lows around 35. .WEDNESDAY...Sunny. Highs around 41. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 35. Highs around 41. && Isle Royale (NW areas)- Including Amygdaloid Island, Lookout Louise, and Minong Mine- ...FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING... .TONIGHT...Patchy fog through midnight. Areas of dense fog late. A 20 percent chance of rain and snow showers late. Mostly cloudy. Lows around 34. East winds 5 to 15 mph. Waves calm to 1 foot building to 2 to 4 feet. .FRIDAY...Areas of dense fog through early afternoon. A chance of rain showers and a slight chance of thunderstorms by mid afternoon. Mostly cloudy. Highs around 48 at the shore and 52 to 57 inland. Southeast winds 10 to 20 mph. Chance of precipitation 50 percent. Waves building to 3 to 6 feet. .FRIDAY NIGHT...Rain showers and a chance of thunderstorms through midnight, then a slight chance of rain showers, snow showers and sleet late. Mostly cloudy. Little or no snow accumulation. Lows around 28. Southwest winds 10 to 20 mph becoming west late. Chance of precipitation 80 percent. Waves 3 to 6 feet. .SATURDAY...Breezy, cold. Mostly cloudy. Highs around 32. West winds 10 to 20 mph. Waves building to 4 to 7 feet. .SATURDAY NIGHT...Breezy. Mostly cloudy. Lows around 23. Northwest winds 10 to 20 mph. Waves 4 to 7 feet. .SUNDAY...Partly sunny through early afternoon then clearing. Highs around 35. .SUNDAY NIGHT...Mostly clear. Lows around 27. .MONDAY...Mostly sunny through early afternoon then becoming partly sunny. Highs around 41. .MONDAY NIGHT...Mostly cloudy. Lows around 36. .TUESDAY THROUGH WEDNESDAY NIGHT...Partly cloudy. Highs around 43. Lows around 34. .THURSDAY...Partly sunny. Highs around 41. && Isle Royale (SE areas)- Including Feldtman Ridge, Rainbow Cove, and Siskiwit Bay- ...FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING... .TONIGHT...Patchy fog by midnight. Areas of dense fog late, then areas of fog late. A 20 percent chance of rain and snow showers late. Mostly cloudy. Lows around 36. East winds 5 to 15 mph. Waves calm to 1 foot building to 2 to 3 feet. .FRIDAY...Patchy fog through early afternoon. A 50 percent chance of rain showers and thunderstorms by mid afternoon. Mostly cloudy. Highs around 49 at the shore and 53 to 58 inland. East winds 5 to 15 mph becoming northeast late. Waves building to 2 to 4 feet. .FRIDAY NIGHT...Rain showers and a chance of thunderstorms through midnight, then a slight chance of rain showers, snow showers and sleet late. Mostly cloudy. Snow accumulation less than one inch. Lows around 28. West winds 5 to 15 mph. Chance of precipitation 80 percent. Waves 2 to 4 feet. .SATURDAY...Breezy. Much colder. Partly sunny. Highs around 33. West winds 10 to 20 mph. Waves building to 3 to 6 feet. .SATURDAY NIGHT...Mostly cloudy. Lows around 25. Northwest winds 10 to 20 mph. Waves subsiding to 1 to 2 feet. .SUNDAY...Partly cloudy. Highs around 35. .SUNDAY NIGHT...Mostly clear. Lows around 29. .MONDAY...Sunny through early afternoon then becoming partly sunny. Highs around 42. .MONDAY NIGHT...Mostly cloudy. Lows around 37. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 45. Lows around 35. .WEDNESDAY...Sunny. Highs around 43. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 35. Highs around 43. && $$