SXUS43 KMQT 210901 RECMQT MIZ001-212000- Recreational Forecast for Isle Royale National Park National Weather Service Marquette MI 501 AM EDT Tue Apr 21 2026 Isle Royale (SW areas)- Including Greenstone Ridge South, Little Todd Harbor, Minong Ridge, and Windigo- .TODAY...Warmer, sunny. Highs 45 to 50. Northwest winds 5 to 15 mph becoming southwest 5 to 10 mph late. Waves 2 to 3 feet subsiding to calm to 1 foot. .TONIGHT...Partly cloudy. Lows around 36. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .WEDNESDAY...Mostly sunny. Highs 45 to 50. Southeast winds up to 10 mph becoming east late. Waves calm to 1 foot. .WEDNESDAY NIGHT...A 20 percent chance of rain showers late. Mostly cloudy. Lows around 38. East winds 5 to 15 mph. Waves building to 1 to 2 feet. .THURSDAY...Partly sunny. Highs around 47. East winds 10 to 20 mph. Waves building to 2 to 3 feet. .THURSDAY NIGHT...Rain showers likely through midnight, then rain showers late. Lows around 39. Chance of showers 80 percent. .FRIDAY...Rain showers likely through early afternoon, then a chance of rain showers by mid afternoon. Mostly cloudy. Highs around 44. Chance of showers 70 percent. .FRIDAY NIGHT...A chance of rain showers through midnight. Mostly cloudy. Lows around 36. Chance of showers 30 percent. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs around 44. Lows around 36. .SUNDAY THROUGH MONDAY...Mostly cloudy. Highs around 45. Lows around 36. && Isle Royale (NE areas)- Including Greenstone Ridge North, Malone Bay, Mount Saginaw, and Rock Harbor- .TODAY...Sunny. Highs around 40 at the shore and 44 to 49 inland. Northwest winds 5 to 10 mph becoming southwest late. Waves 2 to 3 feet subsiding to calm to 1 foot. .TONIGHT...Partly cloudy. Lows around 35. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .WEDNESDAY...Mostly sunny. Highs around 40 at the shore and 42 to 47 inland. Southeast winds up to 10 mph becoming east late. Waves building to 1 to 2 feet. .WEDNESDAY NIGHT...A 20 percent chance of rain showers late. Mostly cloudy. Lows around 37. East winds 5 to 15 mph. Waves building to 3 to 5 feet. .THURSDAY...Partly sunny. Highs around 44. East winds 10 to 20 mph. Waves building to 6 to 9 feet. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with rain showers likely. Lows around 38. Highs around 41. Chance of showers 70 percent. .FRIDAY NIGHT...A chance of rain showers through midnight. Mostly cloudy. Lows around 36. Chance of showers 30 percent. .SATURDAY THROUGH SUNDAY...Partly cloudy. Highs 40 to 45. Lows around 36. .SUNDAY NIGHT AND MONDAY...Mostly cloudy. Lows around 36. Highs around 42. && Isle Royale (NW areas)- Including Amygdaloid Island, Lookout Louise, and Minong Mine- .TODAY...Sunny. Highs around 41 at the shore and 44 to 49 inland. Northwest winds 5 to 15 mph becoming west by mid afternoon. Waves 1 to 2 feet subsiding to calm to 1 foot. .TONIGHT...Partly cloudy. Lows around 35. Southwest winds up to 10 mph becoming southeast late. Waves calm to 1 foot. .WEDNESDAY...Mostly sunny. Highs around 41 at the shore and 43 to 48 inland. Southeast winds up to 10 mph becoming east late. Waves building to 1 to 2 feet. .WEDNESDAY NIGHT...A 20 percent chance of rain showers late. Mostly cloudy. Lows around 36. East winds 5 to 15 mph. Waves building to 2 to 4 feet. .THURSDAY...Partly sunny. Highs around 44. East winds 10 to 20 mph. Waves building to 4 to 7 feet. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with rain showers likely. Lows around 38. Highs around 42. Chance of showers 70 percent. .FRIDAY NIGHT...A chance of rain showers through midnight. Mostly cloudy. Lows around 35. Chance of showers 30 percent. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs around 42. Lows around 35. .SUNDAY THROUGH MONDAY...Mostly cloudy. Highs around 43. Lows around 36. && Isle Royale (SE areas)- Including Feldtman Ridge, Rainbow Cove, and Siskiwit Bay- .TODAY...Sunny. Highs around 44 at the shore and 46 to 51 inland. Northwest winds 5 to 10 mph becoming southwest late. Waves 2 to 3 feet subsiding to calm to 1 foot. .TONIGHT...Mostly clear. Lows around 36. Southwest winds up to 10 mph becoming east late. Waves calm to 1 foot. .WEDNESDAY...Sunny. Highs around 43 at the shore and 45 to 50 inland. Southeast winds up to 10 mph becoming east by mid afternoon. Waves building to 1 to 2 feet. .WEDNESDAY NIGHT...Partly cloudy through midnight, then mostly cloudy with a 20 percent chance of rain showers late. Lows around 38. East winds 5 to 15 mph. Waves building to 2 to 4 feet. .THURSDAY...Partly sunny. Highs 44 to 49. East winds 5 to 15 mph. Waves building to 4 to 7 feet. .THURSDAY NIGHT...A chance of rain showers through midnight, then rain showers late. Mostly cloudy. Lows around 39. Chance of showers 80 percent. .FRIDAY...Rain showers likely through early afternoon, then a chance of rain showers by mid afternoon. Mostly cloudy. Highs around 43. Chance of showers 70 percent. .FRIDAY NIGHT...A chance of rain showers through midnight. Mostly cloudy. Lows around 36. Chance of showers 30 percent. .SATURDAY THROUGH SUNDAY...Partly cloudy. Highs 41 to 46. Lows around 36. .SUNDAY NIGHT AND MONDAY...Mostly cloudy. Lows around 36. Highs 42 to 47. && $$