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MIZ001-162000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Sat Aug 16 2025

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

.TODAY...Cooler. A 20 percent chance of showers by late morning.
Partly sunny. Highs around 66. Northeast winds 10 to 15 mph. Waves
calm to 1 foot building to 1 to 2 feet, then subsiding to calm to
1 foot.
.TONIGHT...Mostly clear. Lows around 56. Northeast winds 10 to
20 mph becoming 15 to 20 mph late. Waves building to 2 to 4 feet.
.SUNDAY...Sunny. Highs around 60. East winds 10 to 20 mph. Waves
subsiding to 1 to 2 feet.
.SUNDAY NIGHT...A slight chance of rain showers through midnight,
then a chance of rain showers late. Mostly cloudy. Lows around 58.
East winds 10 to 15 mph. Chance of showers 50 percent. Waves 1 to
2 feet.
.MONDAY...Rain showers likely through early afternoon, then a chance
of rain showers and a slight chance of thunderstorms by mid
afternoon. Mostly cloudy. Highs around 63. East winds 10 to 20 mph.
Chance of precipitation 70 percent. Waves building to 2 to 3 feet.
.MONDAY NIGHT...Mostly cloudy. Lows around 57.
.TUESDAY...Partly cloudy. Highs around 66.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows around 57. Highs
around 69.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 60. Highs
around 70.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows around 62. Highs
around 72.

&&

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

.TODAY...A 20 percent chance of showers by early afternoon. Partly
sunny. Highs around 65. Northeast winds 10 to 15 mph. Waves 1 to
2 feet subsiding to calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 55. Northeast winds 15 to
20 mph. Waves building to 3 to 5 feet.
.SUNDAY...Sunny. Highs around 59. East winds 10 to 20 mph. Waves
subsiding to 2 to 3 feet.
.SUNDAY NIGHT...A 40 percent chance of rain showers late. Mostly
cloudy. Lows around 58. East winds 10 to 20 mph. Waves subsiding to
1 to 2 feet building to 2 to 4 feet.
.MONDAY...Breezy. Rain showers likely through early afternoon, then
a chance of rain showers by mid afternoon. Mostly cloudy. Highs
around 62. East winds 10 to 20 mph. Chance of showers 60 percent.
Waves building to 4 to 7 feet.
.MONDAY NIGHT...Mostly cloudy. Lows around 57.
.TUESDAY...Partly sunny through early afternoon then becoming mostly
sunny. Highs around 65.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows around 58. Highs
around 69.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 61. Highs
around 70.
.THURSDAY NIGHT...Mostly cloudy. Lows around 62.
.FRIDAY...Partly cloudy. Highs around 71.

&&

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

.TODAY...Cooler. A 20 percent chance of showers by early afternoon.
Partly sunny. Highs around 65. Northeast winds 10 to 15 mph. Waves
1 to 2 feet subsiding to calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 55. Northeast winds 15 to
20 mph. Waves building to 2 to 4 feet.
.SUNDAY...Sunny. Highs around 59. East winds 10 to 20 mph. Waves
subsiding to 1 to 2 feet.
.SUNDAY NIGHT...A 40 percent chance of rain showers late. Mostly
cloudy. Lows around 58. East winds 10 to 20 mph. Waves subsiding to
calm to 1 foot building to 2 to 3 feet.
.MONDAY...Rain showers likely through early afternoon, then a chance
of rain showers by mid afternoon. Mostly cloudy. Highs around 62.
East winds 15 to 20 mph. Chance of showers 60 percent. Waves
building to 3 to 5 feet.
.MONDAY NIGHT...Mostly cloudy. Lows around 56.
.TUESDAY...Partly cloudy. Highs around 65.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows around 58. Highs
around 69.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 61. Highs
around 70.
.THURSDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 62.
.FRIDAY...Mostly sunny. Highs around 71.

&&

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

.TODAY...Cooler. A 20 percent chance of showers by late morning.
Partly sunny. Highs around 66. Northeast winds 10 to 15 mph. Waves
calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 56. Northeast winds 10 to
20 mph becoming 15 to 20 mph late. Waves building to 2 to 4 feet.
.SUNDAY...Sunny through early afternoon then becoming partly cloudy.
Highs around 60. East winds 10 to 20 mph. Waves 2 to 4 feet.
.SUNDAY NIGHT...A slight chance of rain showers through midnight,
then a chance of rain showers late. Mostly cloudy. Lows around 58.
East winds 10 to 15 mph becoming southeast 10 to 20 mph late. Chance
of showers 50 percent. Waves 2 to 3 feet.
.MONDAY...Rain showers likely through early afternoon, then a chance
of rain showers and a slight chance of thunderstorms by mid
afternoon. Mostly cloudy. Highs around 63. East winds 10 to 20 mph.
Chance of precipitation 70 percent. Waves building to 3 to 5 feet.
.MONDAY NIGHT...Mostly cloudy. Lows around 57.
.TUESDAY...Partly sunny through early afternoon then becoming mostly
sunny. Highs around 66.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows around 57. Highs
around 69.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows around 61. Highs
around 70.
.THURSDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 62.
.FRIDAY...Partly cloudy. Highs around 71.

&&


$$