SXUS43 KMQT 180903 RECMQT MIZ001-182000- Recreational Forecast for Isle Royale National Park National Weather Service Marquette MI 502 AM EDT Mon May 18 2026 Isle Royale (SW areas)- Including Greenstone Ridge South, Little Todd Harbor, Minong Ridge, and Windigo- .TODAY...Patchy fog through early afternoon. A chance of rain showers early, then a slight chance of rain showers by late morning. Mostly cloudy. Highs around 48 at the shore and 53 to 58 inland. Northeast winds 5 to 15 mph. Waves 1 to 2 feet building to 2 to 3 feet, then subsiding to 1 to 2 feet. .TONIGHT...A chance of rain showers and a slight chance of thunderstorms through midnight, then rain showers and a slight chance of thunderstorms late. Patchy fog late. Lows around 38. Northeast winds 10 to 20 mph. Chance of precipitation near 100 percent. Waves building to 3 to 6 feet. .TUESDAY...Rain showers likely through early afternoon. Patchy fog through early afternoon. Mostly cloudy. Highs around 43 at the shore and 47 to 52 inland. North winds 10 to 20 mph becoming northwest by late morning. Chance of showers 60 percent. Waves subsiding to 2 to 3 feet. .TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly cloudy. Lows around 35. Northwest winds 5 to 15 mph. Waves building to 2 to 4 feet subsiding to calm to 1 foot. .WEDNESDAY...Sunny. Areas of frost through early afternoon. Highs around 44 at the shore and 47 to 52 inland. Northwest winds up to 10 mph becoming southwest by mid afternoon. Waves building to 1 to 2 feet. .WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 38. Highs around 49 at the shore and 54 to 59 inland. .THURSDAY NIGHT THROUGH SUNDAY...Mostly cloudy. Lows around 41. Highs around 50 at the shore and 57 to 62 inland. && Isle Royale (NE areas)- Including Greenstone Ridge North, Malone Bay, Mount Saginaw, and Rock Harbor- .TODAY...A chance of rain showers early. A slight chance of rain showers by early afternoon. Patchy fog early, then patchy dense fog by late morning. Mostly cloudy. Highs around 45 at the shore and 48 to 53 inland. Northeast winds 5 to 15 mph. Waves 3 to 5 feet. .TONIGHT...A chance of rain showers and a slight chance of thunderstorms through midnight, then rain showers and a slight chance of thunderstorms late. Patchy fog. Lows around 37. Northeast winds 10 to 20 mph. Chance of precipitation near 100 percent. Waves building to 3 to 6 feet. .TUESDAY...Cool. Rain showers likely through early afternoon. Patchy fog through early afternoon. Mostly cloudy. Highs 40 to 45. North winds 10 to 20 mph becoming northwest by late morning. Chance of showers 70 percent. Waves 3 to 6 feet. .TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly cloudy. Lows around 35. Northwest winds 5 to 15 mph. Waves subsiding to 1 to 2 feet. .WEDNESDAY...Cool, sunny. Areas of frost through early afternoon. Highs around 41 at the shore and 43 to 48 inland. Northwest winds 5 to 15 mph becoming southwest by mid afternoon. Waves subsiding to calm to 1 foot building to 1 to 2 feet. .WEDNESDAY NIGHT AND THURSDAY...Cool. Mostly clear. Lows around 38. Highs around 45 at the shore and 48 to 53 inland. .THURSDAY NIGHT THROUGH SUNDAY...Mostly cloudy. Lows around 40. Highs around 44 at the shore and 52 to 57 inland. && Isle Royale (NW areas)- Including Amygdaloid Island, Lookout Louise, and Minong Mine- .TODAY...A chance of rain showers early, then a slight chance of rain showers by late morning. Patchy fog through early afternoon. Patchy dense fog by early afternoon. Mostly cloudy. Highs around 46 at the shore and 51 to 56 inland. Northeast winds 5 to 15 mph. Waves 3 to 5 feet subsiding to 2 to 3 feet. .TONIGHT...A chance of rain showers and a slight chance of thunderstorms through midnight, then rain showers and a slight chance of thunderstorms late. Patchy fog. Lows around 37. Northeast winds 10 to 20 mph. Chance of precipitation near 100 percent. Waves building to 3 to 6 feet. .TUESDAY...Cool. Rain showers likely through early afternoon. Patchy fog through early afternoon. Mostly cloudy. Highs around 42 at the shore and 45 to 50 inland. North winds 10 to 20 mph becoming northwest by late morning. Chance of showers 70 percent. Waves 3 to 6 feet. .TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly cloudy. Lows around 35. Northwest winds 5 to 15 mph. Waves subsiding to 1 to 2 feet. .WEDNESDAY...Cool, sunny. Patchy frost through early afternoon. Highs around 44 at the shore and 46 to 51 inland. Northwest winds 5 to 15 mph becoming southwest by mid afternoon. Waves subsiding to calm to 1 foot building to 1 to 2 feet. .WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 38. Highs around 46 at the shore and 51 to 56 inland. .THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly cloudy. Lows around 40. Highs around 46 at the shore and 52 to 57 inland. .SUNDAY...Partly sunny. Highs around 49 at the shore and 54 to 59 inland. && Isle Royale (SE areas)- Including Feldtman Ridge, Rainbow Cove, and Siskiwit Bay- .TODAY...Warmer. A chance of rain showers early. A slight chance of rain showers by early afternoon. Patchy fog. Mostly cloudy. Highs around 45 at the shore and 53 to 58 inland. Northeast winds 5 to 10 mph becoming 5 to 15 mph by late morning. Waves 2 to 4 feet. .TONIGHT...Rain showers likely and a slight chance of thunderstorms through midnight, then rain showers and a slight chance of thunderstorms late. Patchy fog. Lows around 38. Northeast winds 5 to 15 mph. Chance of precipitation near 100 percent. Waves building to 3 to 5 feet. .TUESDAY...Rain showers likely through early afternoon. Patchy fog through early afternoon. Mostly cloudy. Highs around 43 at the shore and 46 to 51 inland. North winds 10 to 20 mph becoming northwest by late morning. Chance of showers 60 percent. Waves subsiding to 1 to 2 feet. .TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly cloudy. Lows around 36. Northwest winds 5 to 15 mph. Waves subsiding to calm to 1 foot. .WEDNESDAY...Sunny. Patchy frost through early afternoon. Highs around 43 at the shore and 46 to 51 inland. Northwest winds up to 10 mph becoming southwest by mid afternoon. Waves building to 1 to 2 feet. .WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 38. Highs around 45 at the shore and 53 to 58 inland. .THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly cloudy. Lows around 41. Highs around 46 at the shore and 53 to 58 inland. .SUNDAY...Partly sunny. Highs around 48 at the shore and 55 to 60 inland. && $$