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Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Fri Oct 17 2025

Isle Royale (SW areas)-
Including Greenstone Ridge South, Little Todd Harbor, Minong Ridge,
and Windigo-

.TODAY...Warmer. Partly sunny with a 50 percent chance of rain
showers. Highs around 60 at the shore and 63 to 68 inland. South
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 20 percent chance of rain showers through midnight.
Partly cloudy. Lows around 52. Southwest winds 10 to 20 mph. Waves
building to 2 to 4 feet.
.SATURDAY...Mostly sunny through early afternoon then becoming
partly sunny. Highs 57 to 62. West winds 5 to 15 mph. Waves
subsiding to 1 to 2 feet.
.SATURDAY NIGHT...A 20 percent chance of rain showers late. Mostly
cloudy. Lows around 47. Northwest winds 5 to 15 mph becoming 10 to
15 mph late. Waves 1 to 2 feet.
.SUNDAY...A 20 percent chance of rain showers through early
afternoon. Mostly sunny. Highs around 54. Northwest winds 10 to
15 mph. Waves building to 2 to 3 feet subsiding to 1 to 2 feet.
.SUNDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 45.
.MONDAY...Partly sunny. Highs around 54.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 45.
.TUESDAY...Breezy. Mostly cloudy with a 50 percent chance of rain
showers. Highs around 49.
.TUESDAY NIGHT...A chance of rain showers through midnight. Mostly
cloudy. Lows around 41. Chance of showers 40 percent.
.WEDNESDAY...Partly sunny with a 30 percent chance of rain showers.
Highs around 47.
.WEDNESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 41.
.THURSDAY...Partly sunny with a 30 percent chance of rain showers.
Highs around 48.

&&

Isle Royale (NE areas)-
Including Greenstone Ridge North, Malone Bay, Mount Saginaw,
and Rock Harbor-

.TODAY...Warmer. Partly sunny. A chance of rain showers early, then
a slight chance of rain showers by late morning. A chance of rain
showers by mid afternoon. Highs 58 to 63. South winds 5 to 15 mph.
Waves 2 to 3 feet.
.TONIGHT...A 20 percent chance of rain showers through midnight.
Partly cloudy. Lows around 52. Southwest winds 10 to 20 mph becoming
west 10 to 15 mph late. Waves building to 2 to 4 feet.
.SATURDAY...Mostly sunny through early afternoon then becoming
partly sunny. Highs 55 to 60. West winds 5 to 15 mph. Waves
subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 46. West winds 5 to
15 mph becoming northwest 10 to 20 mph by midnight. Waves subsiding
to calm to 1 foot building to 1 to 2 feet.
.SUNDAY...A 20 percent chance of rain showers through early
afternoon. Partly cloudy. Highs around 52. Northwest winds 10 to
20 mph becoming 10 to 15 mph late. Waves building to 2 to 3 feet
subsiding to 1 to 2 feet.
.SUNDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 45.
.MONDAY...Partly sunny. Highs around 52.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 44.
.TUESDAY...Breezy. Mostly cloudy with a 50 percent chance of rain
showers. Highs around 48.
.TUESDAY NIGHT...A chance of rain showers through midnight. Mostly
cloudy. Lows around 40. Chance of showers 40 percent.
.WEDNESDAY...Mostly cloudy with a 30 percent chance of rain showers.
Highs around 45.
.WEDNESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 41.
.THURSDAY...Partly sunny with a 30 percent chance of rain showers.
Highs around 46.

&&

Isle Royale (NW areas)-
Including Amygdaloid Island, Lookout Louise, and Minong Mine-

.TODAY...Warmer. Partly sunny with a 50 percent chance of rain
showers. Highs around 61 at the shore and 63 to 68 inland. South
winds 10 to 15 mph. Waves 2 to 3 feet subsiding to 1 to 2 feet.
.TONIGHT...A 20 percent chance of rain showers through midnight.
Partly cloudy. Lows around 52. Southwest winds 10 to 20 mph becoming
10 to 15 mph late. Waves building to 2 to 3 feet.
.SATURDAY...Mostly sunny through early afternoon then becoming
partly sunny. Highs around 57 at the shore and 59 to 64 inland. West
winds 5 to 15 mph. Waves subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 47. West winds 5 to
15 mph becoming northwest 10 to 20 mph by midnight. Waves 1 to
2 feet.
.SUNDAY...A 20 percent chance of rain showers through early
afternoon. Partly cloudy. Highs around 53. Northwest winds 10 to
20 mph. Waves building to 2 to 3 feet subsiding to 1 to 2 feet.
.SUNDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 45.
.MONDAY...Partly sunny. Highs around 53.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 44.
.TUESDAY...Breezy. Mostly cloudy with a 50 percent chance of rain
showers. Highs around 49.
.TUESDAY NIGHT...A chance of rain showers through midnight. Mostly
cloudy. Lows around 40. Chance of showers 40 percent.
.WEDNESDAY THROUGH THURSDAY...Mostly cloudy with a 30 percent chance
of rain showers. Highs around 47. Lows around 41.

&&

Isle Royale (SE areas)-
Including Feldtman Ridge, Rainbow Cove, and Siskiwit Bay-

.TODAY...Warmer. Partly sunny with a 40 percent chance of rain
showers. Highs around 59 at the shore and 61 to 66 inland. South
winds 5 to 15 mph. Waves 1 to 2 feet building to 2 to 3 feet.
.TONIGHT...A 20 percent chance of rain showers through midnight.
Partly cloudy. Lows around 52. Southwest winds 10 to 20 mph. Waves
building to 2 to 4 feet.
.SATURDAY...Mostly sunny through early afternoon then becoming
partly sunny. Highs 56 to 61. West winds 5 to 15 mph. Waves
subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of rain
showers. Lows around 46. Northwest winds 5 to 15 mph becoming 10 to
15 mph late. Waves subsiding to calm to 1 foot.
.SUNDAY...A 20 percent chance of rain showers through early
afternoon. Partly cloudy. Highs around 52. Northwest winds 10 to
15 mph. Waves building to 1 to 2 feet.
.SUNDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 45.
.MONDAY...Partly sunny. Highs around 53.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 44.
.TUESDAY...Mostly cloudy with a 50 percent chance of rain showers.
Highs around 48.
.TUESDAY NIGHT...A chance of rain showers through midnight. Mostly
cloudy. Lows around 40. Chance of showers 40 percent.
.WEDNESDAY...Partly sunny with a 30 percent chance of rain showers.
Highs around 45.
.WEDNESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 40.
.THURSDAY...Partly sunny with a 30 percent chance of rain showers.
Highs around 47.

&&


$$