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Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Sun Oct 12 2025

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

.TODAY...Mostly cloudy. Highs around 61. South winds 15 to 20 mph.
Waves 3 to 5 feet.
.TONIGHT...Breezy. A chance of rain showers through midnight, then
rain showers late. Lows around 53. South winds 15 to 25 mph. Chance
of showers 90 percent. Waves building to 4 to 7 feet.
.COLUMBUS DAY...A 20 percent chance of rain showers through early
afternoon. Sunny. Highs around 58. Southwest winds 15 to 20 mph
becoming west 10 to 20 mph late. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...Mostly clear. Lows around 42. Northwest winds 10 to
20 mph becoming 10 to 15 mph late. Waves subsiding to 1 to 2 feet.
.TUESDAY...Mostly sunny. Highs around 51. Northwest winds 5 to
15 mph. Waves subsiding to calm to 1 foot.
.TUESDAY NIGHT...Partly cloudy. Lows around 42.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs around 54. Lows
around 46.
.THURSDAY...A chance of rain showers by mid afternoon. Partly sunny.
Highs around 57. Chance of showers 40 percent.
.THURSDAY NIGHT...Rain showers likely. Lows around 50. Chance of
showers 60 percent.
.FRIDAY...Rain showers likely through early afternoon, then a chance
of rain showers by mid afternoon. Mostly cloudy. Highs around 57.
Chance of showers 60 percent.
.FRIDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 49.
.SATURDAY...Partly sunny with a 30 percent chance of rain showers.
Highs around 57.

&&

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

.TODAY...Breezy. Mostly cloudy. Highs around 59. South winds 15 to
25 mph. Waves 2 to 4 feet building to 5 to 8 feet.
.TONIGHT...Breezy. A chance of rain showers through midnight, then
rain showers late. Mostly cloudy. Lows around 54. South winds 15 to
25 mph. Chance of showers 90 percent. Waves building to 6 to 9 feet.
.COLUMBUS DAY...A 20 percent chance of rain showers through early
afternoon. Sunny. Highs around 58. Southwest winds 15 to 20 mph
becoming west 10 to 20 mph by mid afternoon. Waves subsiding to 2 to
3 feet.
.MONDAY NIGHT...Partly cloudy. Lows around 43. Northwest winds 10 to
20 mph. Waves 2 to 3 feet.
.TUESDAY...Partly cloudy. Highs around 50. Northwest winds 10 to
20 mph decreasing to 5 to 10 mph by mid afternoon. Waves subsiding
to calm to 1 foot.
.TUESDAY NIGHT...Partly cloudy. Lows around 43.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs around 53. Lows
around 46.
.THURSDAY...A 30 percent chance of rain showers by mid afternoon.
Partly cloudy. Highs around 56.
.THURSDAY NIGHT...Rain showers likely. Lows around 50. Chance of
showers 60 percent.
.FRIDAY...Rain showers likely. Highs around 56. Chance of showers
60 percent.
.FRIDAY NIGHT AND SATURDAY...A 40 percent chance of rain showers.
Mostly cloudy. Lows around 49. Highs around 56.

&&

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

.TODAY...Breezy. Mostly cloudy. Highs around 60. South winds 15 to
25 mph. Waves 2 to 4 feet building to 3 to 6 feet.
.TONIGHT...Breezy. A chance of rain showers through midnight, then
rain showers late. Mostly cloudy. Lows around 54. South winds 15 to
25 mph. Chance of showers 90 percent. Waves building to 4 to 7 feet.
.COLUMBUS DAY...A 20 percent chance of rain showers through early
afternoon. Sunny. Highs around 58. Southwest winds 15 to 20 mph
becoming west by mid afternoon. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...Mostly clear. Lows around 43. Northwest winds 15 to
20 mph. Waves 2 to 3 feet.
.TUESDAY...Mostly sunny. Highs around 51. Northwest winds 10 to
20 mph decreasing to 5 to 10 mph late. Waves subsiding to calm to
1 foot.
.TUESDAY NIGHT...Partly cloudy. Lows around 43.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs around 53. Lows
around 46.
.THURSDAY...A 30 percent chance of rain showers by mid afternoon.
Partly cloudy. Highs around 56.
.THURSDAY NIGHT...Rain showers likely. Lows around 50. Chance of
showers 60 percent.
.FRIDAY...Rain showers likely through early afternoon, then a chance
of rain showers by mid afternoon. Mostly cloudy. Highs around 56.
Chance of showers 60 percent.
.FRIDAY NIGHT AND SATURDAY...A 40 percent chance of rain showers.
Mostly cloudy. Lows around 49. Highs around 56.

&&

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

.TODAY...Mostly cloudy. Highs around 60. South winds 15 to 20 mph
becoming southeast late. Waves 3 to 5 feet.
.TONIGHT...Breezy. A slight chance of rain showers through midnight,
then rain showers late. Lows around 53. Southeast winds 15 to 25 mph
becoming south late. Chance of showers 90 percent. Waves building to
4 to 7 feet.
.COLUMBUS DAY...A 20 percent chance of rain showers through early
afternoon. Sunny. Highs around 58. Southwest winds 15 to 20 mph
becoming west 10 to 20 mph late. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...Partly cloudy. Lows around 42. Northwest winds 10 to
15 mph. Waves subsiding to calm to 1 foot.
.TUESDAY...Mostly sunny. Highs around 51. Northwest winds 5 to
15 mph. Waves calm to 1 foot.
.TUESDAY NIGHT...Partly cloudy. Lows around 42.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs around 53. Lows
around 46.
.THURSDAY...A chance of rain showers by mid afternoon. Partly sunny.
Highs around 57. Chance of showers 40 percent.
.THURSDAY NIGHT...Rain showers likely. Lows around 50. Chance of
showers 60 percent.
.FRIDAY...Rain showers likely through early afternoon, then a chance
of rain showers by mid afternoon. Mostly cloudy. Highs around 57.
Chance of showers 60 percent.
.FRIDAY NIGHT AND SATURDAY...A 40 percent chance of rain showers.
Mostly cloudy. Lows around 49. Highs around 57.

&&


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