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Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
454 AM EDT Tue Apr 22 2025

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

.TODAY...Partly cloudy through mid afternoon, then mostly cloudy
with a 20 percent chance of rain showers late. Highs around 42.
Northeast winds 5 to 10 mph becoming east late. Waves calm to
1 foot.
.TONIGHT...Mostly cloudy with a 40 percent chance of rain showers.
Lows around 35. Southeast winds 5 to 15 mph. Waves calm to 1 foot.
.WEDNESDAY...Warmer. A chance of rain showers through early
afternoon, then a slight chance of rain showers by mid afternoon.
Partly sunny. Highs around 44 at the shore and 47 to 52 inland.
Southeast winds 5 to 10 mph becoming southwest 10 to 15 mph by mid
afternoon. Chance of showers 40 percent. Waves calm to 1 foot.
.WEDNESDAY NIGHT...Mostly cloudy. Lows 34 to 39. Southwest winds
5 to 10 mph becoming northwest by midnight. Waves calm to 1 foot.
.THURSDAY...Partly sunny. Highs 44 to 49. North winds 5 to 10 mph
becoming east by mid afternoon. Waves calm to 1 foot.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. Lows 34 to 39. Highs
around 45 at the shore and 47 to 52 inland.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows 34 to 39. Highs
46 to 51.
.SATURDAY NIGHT AND SUNDAY...Mostly cloudy. Lows 35 to 40. Highs
48 to 53.
.SUNDAY NIGHT...A chance of rain showers late. Mostly cloudy. Lows
37 to 42. Chance of showers 30 percent.
.MONDAY...Mostly cloudy with a 40 percent chance of rain showers.
Highs around 46.

&&

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

.TODAY...Partly cloudy through mid afternoon then becoming mostly
cloudy. Highs around 39. North winds 5 to 10 mph becoming east by
mid afternoon. Waves calm to 1 foot.
.TONIGHT...A chance of rain showers through midnight, then a slight
chance of rain showers late. Mostly cloudy. Lows around 35. East
winds 10 to 15 mph becoming southeast 5 to 15 mph late. Chance of
showers 30 percent. Waves building to 1 to 2 feet.
.WEDNESDAY...A chance of rain showers through early afternoon, then
a slight chance of rain showers by mid afternoon. Partly sunny.
Highs around 42 at the shore and 44 to 49 inland. Southeast winds
5 to 15 mph becoming south by mid afternoon. Chance of showers
40 percent. Waves building to 2 to 3 feet subsiding to 1 to 2 feet.
.WEDNESDAY NIGHT...Mostly cloudy. Lows around 36. South winds 5 to
10 mph becoming northwest 5 to 15 mph by midnight. Waves subsiding
to calm to 1 foot.
.THURSDAY...Partly sunny. Highs 41 to 46. North winds 5 to 10 mph
becoming northeast late. Waves calm to 1 foot.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. Lows around 36. Highs
42 to 47.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows around
37. Highs 42 to 47.
.SUNDAY AND SUNDAY NIGHT...Mostly cloudy. Highs around 45 at the
shore and 47 to 52 inland. Lows around 39.
.MONDAY...Mostly cloudy with a 40 percent chance of rain showers.
Highs around 44.

&&

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

.TODAY...Partly cloudy through mid afternoon then becoming mostly
cloudy. Highs around 41. North winds 5 to 10 mph becoming east by
mid afternoon. Waves calm to 1 foot.
.TONIGHT...A chance of rain showers through midnight, then a slight
chance of rain showers late. Mostly cloudy. Lows around 35.
Southeast winds 10 to 15 mph. Chance of showers 30 percent. Waves
building to 1 to 2 feet.
.WEDNESDAY...A chance of rain showers through early afternoon, then
a slight chance of rain showers by mid afternoon. Partly sunny.
Highs around 42 at the shore and 46 to 51 inland. Southeast winds
5 to 15 mph becoming south by mid afternoon. Chance of showers
30 percent. Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Mostly cloudy. Lows around 35. Southwest winds
5 to 10 mph becoming northwest 5 to 15 mph by midnight. Waves
subsiding to calm to 1 foot.
.THURSDAY...Partly sunny. Highs 43 to 48. North winds 5 to 10 mph
becoming east late. Waves calm to 1 foot.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. Lows 34 to 39. Highs
44 to 49.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows 35 to 40.
Highs 44 to 49.
.SUNDAY AND SUNDAY NIGHT...Mostly cloudy. Highs 46 to 51. Lows 37 to
42.
.MONDAY...Mostly cloudy with a 40 percent chance of rain showers.
Highs around 45.

&&

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

.TODAY...Partly cloudy through mid afternoon, then mostly cloudy
with a 20 percent chance of rain showers late. Highs around 41.
Northeast winds 5 to 10 mph becoming east 5 to 15 mph by late
morning. Waves calm to 1 foot.
.TONIGHT...Mostly cloudy with a 40 percent chance of rain showers.
Lows around 36. East winds 5 to 15 mph. Waves building to 1 to
2 feet.
.WEDNESDAY...Warmer. A chance of rain showers through early
afternoon, then a slight chance of rain showers by mid afternoon.
Partly sunny. Highs around 44 at the shore and 46 to 51 inland.
Southeast winds 5 to 10 mph becoming southwest 10 to 15 mph by mid
afternoon. Chance of showers 40 percent. Waves subsiding to calm to
1 foot.
.WEDNESDAY NIGHT...Mostly cloudy. Lows around 36. Southwest winds
5 to 10 mph becoming northwest by midnight. Waves calm to 1 foot.
.THURSDAY...Partly sunny. Highs 43 to 48. North winds 5 to 10 mph
becoming east by mid afternoon. Waves calm to 1 foot.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. Lows around 36. Highs
around 44 at the shore and 46 to 51 inland.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows 35 to 40.
Highs 44 to 49.
.SUNDAY...Partly sunny. Highs 47 to 52.
.SUNDAY NIGHT...A chance of rain showers late. Mostly cloudy. Lows
around 39. Chance of showers 30 percent.
.MONDAY...Mostly cloudy with a 40 percent chance of rain showers.
Highs around 46.

&&


$$