SXUS43 KMQT 190902 RECMQT MIZ001-192000- Recreational Forecast for Isle Royale National Park National Weather Service Marquette MI 501 AM EDT Tue May 19 2026 Isle Royale (SW areas)- Including Greenstone Ridge South, Little Todd Harbor, Minong Ridge, and Windigo- .TODAY...A 50 percent chance of rain showers early. Patchy fog early. Mostly cloudy. Highs around 45 at the shore and 49 to 54 inland. North winds 10 to 20 mph becoming northwest 5 to 15 mph by late morning. Waves 3 to 5 feet subsiding to 1 to 2 feet. .TONIGHT...Partly cloudy. Lows around 36. Northwest winds 5 to 15 mph. Waves building to 2 to 3 feet subsiding to calm to 1 foot. .WEDNESDAY...Sunny. Highs around 44 at the shore and 48 to 53 inland. Northwest winds 5 to 10 mph becoming southwest 5 to 15 mph by mid afternoon. Waves building to 1 to 2 feet. .WEDNESDAY NIGHT...Mostly clear. Lows around 39. South winds 5 to 15 mph. Waves subsiding to calm to 1 foot. .THURSDAY...Warmer, sunny. Highs around 48 at the shore and 55 to 60 inland. South winds 5 to 10 mph becoming southeast late. Waves calm to 1 foot. .THURSDAY NIGHT...Partly cloudy. Lows around 41. .FRIDAY THROUGH SUNDAY...Mostly cloudy. Highs around 49 at the shore and 55 to 60 inland. Lows around 40. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly cloudy. Lows around 43. Highs around 54 at the shore and 59 to 64 inland. && Isle Royale (NE areas)- Including Greenstone Ridge North, Malone Bay, Mount Saginaw, and Rock Harbor- .TODAY...Cool. A 50 percent chance of rain showers early. Patchy fog early. Mostly cloudy. Highs around 42 at the shore and 44 to 49 inland. North winds 10 to 20 mph becoming northwest 5 to 15 mph by late morning. Waves 3 to 6 feet subsiding to 2 to 3 feet. .TONIGHT...Partly cloudy. Lows around 35. Northwest winds 5 to 15 mph. Waves subsiding to calm to 1 foot. .WEDNESDAY...Cool, sunny. Highs around 41 at the shore and 43 to 48 inland. Northwest winds 5 to 10 mph becoming southwest 5 to 15 mph by mid afternoon. Waves calm to 1 foot. .WEDNESDAY NIGHT...Mostly clear. Lows around 38. South winds 5 to 15 mph. Waves calm to 1 foot. .THURSDAY...Sunny. Highs around 45 at the shore and 49 to 54 inland. South winds 5 to 10 mph becoming southeast 5 to 15 mph by mid afternoon. Waves building to 1 to 2 feet. .THURSDAY NIGHT AND FRIDAY...Cool. Partly cloudy. Lows around 39. Highs around 44 at the shore and 47 to 52 inland. .FRIDAY NIGHT THROUGH SUNDAY...Mostly cloudy. Lows around 39. Highs around 45 at the shore and 50 to 55 inland. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly cloudy. Lows around 42. Highs around 48 at the shore and 55 to 60 inland. && Isle Royale (NW areas)- Including Amygdaloid Island, Lookout Louise, and Minong Mine- .TODAY...A 50 percent chance of rain showers early. Patchy fog early. Mostly cloudy. Highs around 42 at the shore and 47 to 52 inland. North winds 10 to 20 mph becoming northwest by late morning. Waves 3 to 6 feet subsiding to 2 to 3 feet. .TONIGHT...Partly cloudy. Lows around 35. Northwest winds 5 to 15 mph. Waves subsiding to calm to 1 foot. .WEDNESDAY...Cool, sunny. Highs around 44 at the shore and 47 to 52 inland. Northwest winds 5 to 15 mph becoming southwest by mid afternoon. Waves calm to 1 foot. .WEDNESDAY NIGHT...Mostly clear. Lows around 38. South winds 5 to 15 mph. Waves calm to 1 foot. .THURSDAY...Warmer, sunny. Highs around 46 at the shore and 52 to 57 inland. South winds 5 to 10 mph becoming 5 to 15 mph by mid afternoon. Waves calm to 1 foot. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows around 40. Highs around 45 at the shore and 50 to 55 inland. .FRIDAY NIGHT THROUGH SUNDAY NIGHT...Mostly cloudy. Lows 39 to 44. Highs around 47 at the shore and 53 to 58 inland. .MEMORIAL DAY...Partly sunny. Highs around 51 at the shore and 57 to 62 inland. && Isle Royale (SE areas)- Including Feldtman Ridge, Rainbow Cove, and Siskiwit Bay- .TODAY...A 40 percent chance of rain showers early. Patchy fog early. Mostly cloudy. Highs around 44 at the shore and 49 to 54 inland. North winds 5 to 15 mph becoming northwest by late morning. Waves 2 to 4 feet subsiding to 1 to 2 feet. .TONIGHT...Partly cloudy. Areas of frost late. Lows around 36. Northwest winds up to 10 mph. Waves subsiding to calm to 1 foot. .WEDNESDAY...Sunny. Highs around 43 at the shore and 47 to 52 inland. Northwest winds 5 to 10 mph becoming southwest 5 to 15 mph by mid afternoon. Waves calm to 1 foot. .WEDNESDAY NIGHT...Mostly clear. Lows around 39. South winds up to 10 mph. Waves calm to 1 foot. .THURSDAY...Warmer, sunny. Highs around 48 at the shore and 54 to 59 inland. South winds 5 to 10 mph becoming southeast late. Waves calm to 1 foot. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows around 40. Highs around 46 at the shore and 52 to 57 inland. .FRIDAY NIGHT THROUGH SUNDAY...Mostly cloudy. Lows around 40. Highs around 45 at the shore and 54 to 59 inland. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly cloudy. Lows around 43. Highs around 51 at the shore and 58 to 63 inland. && $$