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MIZ001-242000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Sun Aug 24 2025

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

.TODAY...A slight chance of waterspouts early. A chance of
waterspouts by late morning, then a slight chance of waterspouts by
early afternoon. A chance of rain showers through mid afternoon,
then a chance of sprinkles late. Mostly cloudy. Highs around 61.
Northwest winds 15 to 20 mph. Waves 2 to 4 feet.
.TONIGHT...Mostly cloudy through midnight then becoming partly
cloudy. Lows around 54. Northwest winds 10 to 20 mph. Waves building
to 2 to 4 feet.
.MONDAY...Sunny. Highs around 63. Northwest winds 5 to 15 mph
becoming 5 to 10 mph late. Waves subsiding to calm to 1 foot.
.MONDAY NIGHT...Mostly clear. Lows around 56. Northwest winds 5 to
15 mph. Waves calm to 1 foot.
.TUESDAY...Sunny. Highs 64 to 69. Northwest winds 5 to 15 mph
becoming southwest by mid afternoon. Waves building to 1 to 2 feet.
.TUESDAY NIGHT...Partly cloudy. Lows around 60.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs 66 to 71. Lows
around 56.
.THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs around 63. Lows
around 56.
.FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs 65 to 70. Lows
around 59.
.SATURDAY...Partly cloudy. Highs around 67 at the shore and 70 to
75 inland.

&&

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

.TODAY...Mostly cloudy. A slight chance of waterspouts. A slight
chance of rain showers early. A chance of rain showers by late
morning, then a chance of sprinkles late. Highs around 61. Northwest
winds 15 to 20 mph. Waves 2 to 3 feet building to 2 to 4 feet.
.TONIGHT...Breezy. Mostly cloudy through midnight then becoming
partly cloudy. Lows around 54. Northwest winds 15 to 25 mph. Waves
2 to 3 feet.
.MONDAY...Sunny. Highs around 63. Northwest winds 5 to 15 mph. Waves
subsiding to calm to 1 foot.
.MONDAY NIGHT...Partly cloudy. Lows around 56. Northwest winds 5 to
15 mph. Waves calm to 1 foot.
.TUESDAY...Sunny. Highs 63 to 68. Northwest winds 5 to 10 mph
becoming west 5 to 15 mph by mid afternoon. Waves calm to 1 foot.
.TUESDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 59.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs 64 to 69. Lows
around 55.
.THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs around 61. Lows
around 55.
.FRIDAY...Mostly sunny. Highs 63 to 68.
.FRIDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 59.
.SATURDAY...Partly cloudy. Highs around 66 at the shore and 68 to
73 inland.

&&

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

.TODAY...Mostly cloudy. A slight chance of waterspouts early, then a
chance of waterspouts by late morning. A slight chance of rain
showers early, then a chance of rain showers by late morning. A
chance of sprinkles late. Highs around 60. Northwest winds 15 to
20 mph. Waves 2 to 4 feet.
.TONIGHT...Breezy. Mostly cloudy through midnight then becoming
partly cloudy. Lows around 54. Northwest winds 15 to 25 mph. Waves
building to 2 to 4 feet.
.MONDAY...Sunny. Highs around 63. Northwest winds 10 to 20 mph
decreasing to 5 to 10 mph late. Waves subsiding to calm to 1 foot.
.MONDAY NIGHT...Mostly clear. Lows around 56. Northwest winds 5 to
15 mph. Waves building to 1 to 2 feet.
.TUESDAY...Sunny. Highs around 64 at the shore and 66 to 71 inland.
Northwest winds 5 to 15 mph becoming southwest 10 to 15 mph late.
Waves subsiding to calm to 1 foot.
.TUESDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 60.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs 65 to 70. Lows
53 to 58.
.THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs 60 to 65. Lows
around 56.
.FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs 64 to 69. Lows
around 59.
.SATURDAY...Partly cloudy. Highs around 67 at the shore and 71 to
76 inland.

&&

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

.TODAY...Mostly cloudy. A slight chance of waterspouts through mid
afternoon. A slight chance of rain showers early. A chance of rain
showers by late morning, then a chance of sprinkles late. Highs
around 61. Northwest winds 15 to 20 mph. Waves 1 to 2 feet subsiding
to calm to 1 foot.
.TONIGHT...Mostly cloudy. Lows around 54. Northwest winds 10 to
20 mph. Waves building to 1 to 2 feet.
.MONDAY...Mostly sunny. Highs around 64. Northwest winds 5 to 15 mph
becoming 5 to 10 mph late. Waves subsiding to calm to 1 foot.
.MONDAY NIGHT...Partly cloudy. Lows around 55. Northwest winds 5 to
10 mph. Waves calm to 1 foot.
.TUESDAY...Sunny. Highs 64 to 69. Northwest winds 5 to 10 mph
becoming west 5 to 15 mph by mid afternoon. Waves building to 1 to
2 feet.
.TUESDAY NIGHT...Partly cloudy. Lows around 59.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs 66 to 71. Lows
around 55.
.THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs 60 to 65. Lows
around 56.
.FRIDAY...Partly cloudy. Highs 64 to 69.
.FRIDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows around 59.
.SATURDAY...Partly cloudy. Highs around 67 at the shore and 70 to
75 inland.

&&


$$