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MIZ001-060800-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 PM EDT Fri Sep 5 2025

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

.TONIGHT...Windy. Mostly cloudy with a 20 percent chance of rain
showers through midnight, then partly cloudy late. Lows around 47.
Northwest winds 15 to 25 mph. Waves 3 to 6 feet.
.SATURDAY...Mostly sunny through early afternoon then becoming
partly sunny. Highs around 57. Northwest winds 10 to 20 mph. Waves
subsiding to 1 to 2 feet, then building to 2 to 3 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 46. Northwest winds
10 to 20 mph. Waves building to 2 to 3 feet.
.SUNDAY...Sunny through early afternoon then becoming partly cloudy.
Highs around 59. Northwest winds 10 to 15 mph becoming west by mid
afternoon. Waves subsiding to calm to 1 foot building to 1 to
2 feet.
.SUNDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 52. West winds 5 to 15 mph. Waves building to
2 to 3 feet subsiding to 1 to 2 feet.
.MONDAY...Partly sunny. Highs around 62.
.MONDAY NIGHT...A chance of rain showers late. Cloudy. Lows around
56. Chance of showers 40 percent.
.TUESDAY...Mostly cloudy with a chance of rain showers through early
afternoon, then partly cloudy by mid afternoon. Highs around 65.
Chance of showers 30 percent.
.TUESDAY NIGHT...Mostly cloudy. Lows around 53.
.WEDNESDAY THROUGH THURSDAY NIGHT...Partly cloudy. Highs around 58.
Lows around 51.
.FRIDAY...Warmer. Partly sunny. Highs around 59 at the shore and
63 to 68 inland.

&&

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

.TONIGHT...Windy. Mostly cloudy with a 20 percent chance of rain
showers through midnight, then partly cloudy late. Lows around 47.
Northwest winds 15 to 25 mph. Waves 3 to 6 feet.
.SATURDAY...Breezy. Mostly sunny through early afternoon then
becoming partly sunny. Highs around 56. Northwest winds 15 to 25 mph
decreasing to 10 to 15 mph late. Waves subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 47. Northwest winds
10 to 20 mph. Waves building to 2 to 3 feet.
.SUNDAY...Partly cloudy. Highs around 58. Northwest winds 10 to
20 mph becoming west 5 to 15 mph by mid afternoon. Waves subsiding
to calm to 1 foot building to 1 to 2 feet.
.SUNDAY NIGHT...Mostly cloudy. Lows around 52. West winds 5 to
15 mph. Waves subsiding to calm to 1 foot.
.MONDAY...Partly sunny. Highs around 60.
.MONDAY NIGHT...A chance of rain showers late. Cloudy. Lows around
55. Chance of showers 30 percent.
.TUESDAY...A chance of rain showers through early afternoon. Partly
sunny. Highs around 63. Chance of showers 30 percent.
.TUESDAY NIGHT...Mostly cloudy. Lows 51 to 56.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy. Highs around 57. Lows
around 50.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. Lows around 52. Highs
around 58 at the shore and 60 to 65 inland.

&&

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

.TONIGHT...Windy. Mostly cloudy with a 20 percent chance of rain
showers through midnight, then partly cloudy late. Lows around 47.
Northwest winds 15 to 25 mph. Waves 3 to 6 feet building to 4 to
7 feet.
.SATURDAY...Breezy. Mostly sunny through early afternoon then
becoming partly sunny. Highs around 56. Northwest winds 15 to 25 mph
decreasing to 10 to 15 mph late. Waves subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 48. Northwest winds
10 to 20 mph. Waves building to 2 to 3 feet.
.SUNDAY...Partly cloudy. Highs around 59. Northwest winds 10 to
20 mph becoming west 10 to 15 mph by mid afternoon. Waves subsiding
to calm to 1 foot building to 1 to 2 feet.
.SUNDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 52. West winds 5 to 15 mph. Waves subsiding to
calm to 1 foot.
.MONDAY...Partly sunny. Highs around 62.
.MONDAY NIGHT AND TUESDAY...A 30 percent chance of rain showers.
Mostly cloudy. Lows around 56. Highs around 64.
.TUESDAY NIGHT...Mostly cloudy. Lows around 53.
.WEDNESDAY THROUGH THURSDAY NIGHT...Partly cloudy. Highs around 58.
Lows around 51.
.FRIDAY...Partly cloudy. Highs around 60 at the shore and 63 to
68 inland.

&&

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

.TONIGHT...Windy. Mostly cloudy with a 20 percent chance of rain
showers through midnight, then partly cloudy late. Lows around 46.
Northwest winds 15 to 25 mph. Waves 3 to 5 feet subsiding to 2 to
3 feet.
.SATURDAY...Mostly sunny through early afternoon then becoming
partly sunny. Highs around 57. West winds 10 to 20 mph. Waves
subsiding to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 47. Northwest winds
10 to 15 mph. Waves subsiding to calm to 1 foot.
.SUNDAY...Partly cloudy. Highs 57 to 62. Northwest winds 10 to
15 mph becoming west late. Waves building to 1 to 2 feet.
.SUNDAY NIGHT...Mostly cloudy. Lows around 52. West winds 5 to
15 mph. Waves 1 to 2 feet.
.MONDAY...Partly sunny. Highs around 62.
.MONDAY NIGHT...A chance of rain showers late. Cloudy. Lows around
56. Chance of showers 40 percent.
.TUESDAY...A chance of rain showers through early afternoon. Partly
sunny. Highs around 64. Chance of showers 30 percent.
.TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. Lows 51 to 56. Highs
around 57.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 50. Highs
around 58.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. Lows around 52. Highs
around 58 at the shore and 62 to 67 inland.

&&


$$