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MIZ001-082000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Wed Oct 8 2025

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

...FROST ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING...

.TODAY...Sunny. Patchy frost early. Highs around 54. Northwest winds
up to 5 mph becoming west by late morning, then becoming southwest
5 to 15 mph by mid afternoon. Waves calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 44. South winds 5 to 15 mph.
Waves building to 1 to 2 feet.
.THURSDAY...Warmer, sunny. Highs 59 to 64. Southwest winds 10 to
20 mph. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 52. Southwest winds 10 to 20 mph. Waves
building to 3 to 5 feet.
.FRIDAY...Partly sunny with a 30 percent chance of rain showers.
Highs 58 to 63. West winds 10 to 15 mph becoming northwest 5 to
15 mph by late morning. Waves subsiding to calm to 1 foot.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows around 49. Highs
around 56 at the shore and 59 to 64 inland.
.SATURDAY NIGHT...Partly cloudy. Lows around 52.
.SUNDAY...Partly sunny. Highs around 60 at the shore and 63 to
68 inland.
.SUNDAY NIGHT...Rain showers likely through midnight, then a chance
of rain showers late. Mostly cloudy. Lows around 54. Chance of
showers 60 percent.
.COLUMBUS DAY...Partly sunny with a 40 percent chance of rain
showers. Highs 60 to 65.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 49.
.TUESDAY...Partly sunny. Highs around 55 at the shore and 58 to
63 inland.

&&

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

...FROST ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING...

.TODAY...Sunny. Highs 51 to 56. Northwest winds 5 to 10 mph becoming
southwest by mid afternoon. Waves calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 45. Southwest winds 5 to
15 mph. Waves building to 2 to 3 feet.
.THURSDAY...Warmer, sunny. Highs 57 to 62. Southwest winds 10 to
20 mph. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Cloudy with a 50 percent chance of rain showers.
Lows around 51. Southwest winds 10 to 20 mph. Waves building to 3 to
5 feet.
.FRIDAY...Partly sunny with a 40 percent chance of rain showers.
Highs 55 to 60. West winds 10 to 15 mph becoming north 5 to 10 mph
late. Waves subsiding to calm to 1 foot.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows around
50. Highs 54 to 59.
.SUNDAY...Partly sunny. Highs 58 to 63.
.SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of rain
showers. Lows around 53.
.COLUMBUS DAY...Partly sunny with a 40 percent chance of rain
showers. Highs 57 to 62.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 49.
.TUESDAY...Partly sunny. Highs 54 to 59.

&&

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

...FROST ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING...

.TODAY...Sunny. Patchy frost early. Highs 52 to 57. Northwest winds
5 to 10 mph becoming southwest by mid afternoon. Waves calm to
1 foot.
.TONIGHT...Mostly clear. Lows around 44. South winds 5 to 15 mph.
Waves building to 1 to 2 feet.
.THURSDAY...Warmer, sunny. Highs around 59 at the shore and 61 to
66 inland. Southwest winds 10 to 20 mph. Waves building to 2 to
3 feet, then subsiding to 1 to 2 feet.
.THURSDAY NIGHT...Mostly cloudy with a 50 percent chance of rain
showers. Lows around 51. Southwest winds 10 to 20 mph. Waves
building to 2 to 3 feet.
.FRIDAY...Partly sunny with a 40 percent chance of rain showers.
Highs around 57 at the shore and 59 to 64 inland. West winds 10 to
15 mph becoming north 5 to 15 mph late. Waves subsiding to calm to
1 foot.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows around 49. Highs
around 56 at the shore and 59 to 64 inland.
.SATURDAY NIGHT...Partly cloudy. Lows around 52.
.SUNDAY...Partly sunny. Highs around 60 at the shore and 63 to
68 inland.
.SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of rain
showers. Lows around 54.
.COLUMBUS DAY...Partly sunny with a 40 percent chance of rain
showers. Highs around 59 at the shore and 61 to 66 inland.
.MONDAY NIGHT...A chance of rain showers late. Mostly cloudy. Lows
around 49. Chance of showers 30 percent.
.TUESDAY...Partly sunny. Highs around 56 at the shore and 58 to
63 inland.

&&

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

...FROST ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING...

.TODAY...Sunny. Patchy frost early. Highs 51 to 56. Northwest winds
up to 5 mph becoming southwest by mid afternoon. Waves calm to
1 foot.
.TONIGHT...Mostly clear. Lows around 44. South winds 5 to 15 mph.
Waves building to 1 to 2 feet.
.THURSDAY...Warmer, sunny. Highs 58 to 63. Southwest winds 10 to
20 mph. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Cloudy with a 40 percent chance of rain showers.
Lows around 51. Southwest winds 10 to 20 mph. Waves building to 3 to
5 feet.
.FRIDAY...Partly sunny with a 30 percent chance of rain showers.
Highs 56 to 61. West winds 10 to 15 mph becoming northwest 5 to
15 mph by late morning. Waves subsiding to calm to 1 foot.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows around
50. Highs 56 to 61.
.SUNDAY...Partly sunny. Highs around 58 at the shore and 61 to
66 inland.
.SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of rain
showers. Lows around 53.
.COLUMBUS DAY...Partly sunny with a 40 percent chance of rain
showers. Highs 58 to 63.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain
showers. Lows around 49.
.TUESDAY...Partly sunny. Highs around 55 at the shore and 57 to
62 inland.

&&


$$