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MIZ001-012000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Mon Sep 1 2025

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

.TODAY...Patchy fog early. Isolated rain showers and thunderstorms
early, then isolated rain showers by late morning. Partly cloudy
through mid afternoon then clearing. Highs around 63 at the shore
and 70 to 75 inland. Southwest winds 5 to 15 mph. Waves calm to
1 foot.
.TONIGHT...A 20 percent chance of rain showers late. Partly cloudy.
Lows around 60. Southwest winds 5 to 15 mph. Waves calm to 1 foot.
.TUESDAY...Mostly sunny through early afternoon, then partly sunny
with a 30 percent chance of showers and thunderstorms by mid
afternoon. Highs 66 to 71. Southwest winds 5 to 15 mph. Waves
building to 1 to 2 feet.
.TUESDAY NIGHT...Rain showers and a chance of thunderstorms through
midnight, then rain showers likely and a slight chance of
thunderstorms late. Lows around 50. Southwest winds 10 to 15 mph
becoming north 10 to 20 mph late. Chance of precipitation
80 percent. Waves building to 2 to 3 feet, then subsiding to 1 to
2 feet.
.WEDNESDAY...Breezy, cool. Mostly cloudy with a 50 percent chance of
rain showers. Highs around 52. North winds 20 to 25 mph. Waves
building to 2 to 4 feet.
.WEDNESDAY NIGHT...Breezy. Cloudy with a 40 percent chance of rain
showers. Lows around 44.
.THURSDAY...Cool. Mostly cloudy with a 40 percent chance of rain
showers. Highs around 50.
.THURSDAY NIGHT...Cloudy with a 40 percent chance of rain showers.
Lows around 46.
.FRIDAY...A chance of rain showers through early afternoon. Mostly
cloudy. Highs around 53. Chance of showers 30 percent.
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows around 47. Highs
around 56.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows around 48. Highs
around 60.

&&

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

.TODAY...Mostly sunny. Areas of fog early. Patchy fog by late
morning. Highs around 61 at the shore and 67 to 72 inland. Southwest
winds 5 to 15 mph. Waves calm to 1 foot building to 1 to 2 feet.
.TONIGHT...A 20 percent chance of rain showers late. Partly cloudy.
Lows around 58. Southwest winds 5 to 15 mph. Waves subsiding to calm
to 1 foot building to 1 to 2 feet.
.TUESDAY...Sunny through early afternoon, then partly cloudy with a
20 percent chance of rain showers and thunderstorms by mid
afternoon. Highs around 66. Southwest winds 5 to 15 mph. Waves
building to 2 to 3 feet subsiding to 1 to 2 feet.
.TUESDAY NIGHT...Breezy. Rain showers and a chance of thunderstorms
through midnight, then rain showers and a slight chance of
thunderstorms late. Lows around 50. Southwest winds 10 to 15 mph
becoming west by midnight, then becoming northwest 10 to 20 mph late
becoming north 15 to 25 mph late. Chance of precipitation
80 percent. Waves building to 2 to 4 feet.
.WEDNESDAY...Breezy, cool. Cloudy with a 50 percent chance of rain
showers. Highs around 52. North winds 20 to 25 mph. Waves building
to 3 to 5 feet.
.WEDNESDAY NIGHT...Breezy. Cloudy with a 40 percent chance of rain
showers. Lows around 44.
.THURSDAY...Cool. Mostly cloudy with a 40 percent chance of rain
showers. Highs around 50.
.THURSDAY NIGHT...Cloudy with a 30 percent chance of rain showers.
Lows around 46.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs around 53. Lows
around 47.
.SATURDAY AND SATURDAY NIGHT...Mostly cloudy. Highs around 56. Lows
around 49.
.SUNDAY...Mostly sunny. Highs around 59.

&&

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

.TODAY...Mostly sunny. Areas of fog early. Patchy fog by late
morning. Highs around 62 at the shore and 71 to 76 inland. Southwest
winds 5 to 10 mph. Waves calm to 1 foot.
.TONIGHT...A 20 percent chance of rain showers late. Partly cloudy.
Lows around 59. Southwest winds 5 to 15 mph. Waves calm to 1 foot.
.TUESDAY...Sunny through early afternoon, then partly cloudy with a
20 percent chance of rain showers and thunderstorms by mid
afternoon. Highs around 67. Southwest winds 5 to 15 mph. Waves
building to 1 to 2 feet.
.TUESDAY NIGHT...Breezy. Rain showers and a chance of thunderstorms
through midnight, then rain showers likely and a slight chance of
thunderstorms late. Lows around 50. Southwest winds 10 to 15 mph
becoming north 10 to 20 mph late. Chance of precipitation
80 percent. Waves subsiding to calm to 1 foot, then building to 2 to
4 feet.
.WEDNESDAY...Breezy, cool. Mostly cloudy with a 50 percent chance of
rain showers. Highs around 52. North winds 20 to 25 mph. Waves
building to 3 to 5 feet.
.WEDNESDAY NIGHT...Breezy. Cloudy with a 40 percent chance of rain
showers. Lows around 44.
.THURSDAY...Cool. Mostly cloudy with a 40 percent chance of rain
showers. Highs around 50.
.THURSDAY NIGHT...Cloudy with a 30 percent chance of rain showers.
Lows around 46.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs around 53. Lows
around 47.
.SATURDAY AND SATURDAY NIGHT...Mostly cloudy. Highs around 56. Lows
around 49.
.SUNDAY...Mostly sunny. Highs around 60.

&&

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

.TODAY...Isolated rain showers and thunderstorms early. Patchy fog
through early afternoon. Partly cloudy through mid afternoon then
clearing. Highs around 59 at the shore and 69 to 74 inland.
Southwest winds 5 to 15 mph. Waves calm to 1 foot.
.TONIGHT...Partly cloudy. Lows around 58. Southwest winds 5 to
15 mph. Waves calm to 1 foot.
.TUESDAY...A 20 percent chance of rain showers and thunderstorms by
mid afternoon. Partly cloudy. Highs around 67. Southwest winds 10 to
15 mph. Waves building to 1 to 2 feet.
.TUESDAY NIGHT...Rain showers and a chance of thunderstorms through
midnight, then rain showers likely and a slight chance of
thunderstorms late. Lows around 50. Southwest winds 10 to 15 mph
becoming northwest 10 to 20 mph late. Chance of precipitation
80 percent. Waves 1 to 2 feet.
.WEDNESDAY...Breezy, cool. Cloudy with a 50 percent chance of rain
showers. Highs around 52. North winds 15 to 25 mph. Waves 1 to
2 feet.
.WEDNESDAY NIGHT...Cloudy with a 40 percent chance of rain showers.
Lows around 44.
.THURSDAY...Cool. Mostly cloudy with a 40 percent chance of rain
showers. Highs around 50.
.THURSDAY NIGHT...A chance of rain showers. Cloudy. Lows around 46.
Chance of showers 40 percent.
.FRIDAY...A chance of rain showers through early afternoon. Mostly
cloudy. Highs around 53. Chance of showers 30 percent.
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows around 47. Highs
around 56.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows around 49. Highs
around 60.

&&


$$