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SXUS43 KMQT 200901
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MIZ001-202000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Wed Aug 20 2025

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

.TODAY...Partly sunny through early afternoon then clearing. Highs
around 68. North winds 5 to 10 mph becoming southwest by mid
afternoon. Waves calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 58. Southwest winds 5 to
10 mph. Waves calm to 1 foot.
.THURSDAY...Partly cloudy. Highs around 66 at the shore and 69 to
74 inland. South winds 5 to 10 mph. Waves calm to 1 foot.
.THURSDAY NIGHT...A 20 percent chance of showers and thunderstorms
late. Mostly cloudy. Lows around 61. South winds 5 to 10 mph
becoming southwest 5 to 15 mph late. Waves building to 1 to 2 feet.
.FRIDAY...Mostly sunny with a chance of showers and a slight chance
of thunderstorms. Highs around 68 at the shore and 72 to 77 inland.
Southwest winds 10 to 20 mph. Chance of precipitation 30 percent.
Waves building to 2 to 3 feet.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows around 60. Highs
around 66.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly cloudy. Lows around
53. Highs around 61.
.MONDAY AND MONDAY NIGHT...Partly cloudy. Highs around 64. Lows
around 53.
.TUESDAY...Sunny. Highs 65 to 70.

&&

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

.TODAY...Partly sunny through early afternoon then clearing. Highs
around 67. North winds 5 to 10 mph becoming south by early
afternoon, then becoming southwest late. Waves calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 58. Southwest winds 5 to
10 mph. Waves calm to 1 foot.
.THURSDAY...Partly sunny. Highs around 66. South winds 5 to 10 mph.
Waves calm to 1 foot.
.THURSDAY NIGHT...A 20 percent chance of showers and thunderstorms
late. Mostly cloudy. Lows around 61. South winds 5 to 10 mph
becoming southwest 5 to 15 mph late. Waves building to 1 to 2 feet.
.FRIDAY...Partly sunny with a slight chance of showers and
thunderstorms through early afternoon, then mostly sunny with a
chance of showers and a slight chance of thunderstorms by mid
afternoon. Highs 68 to 73. Southwest winds 10 to 15 mph. Chance of
precipitation 30 percent. Waves building to 2 to 3 feet.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows around 61. Highs
around 64.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly cloudy. Lows around
54. Highs around 59.
.MONDAY AND MONDAY NIGHT...Partly cloudy. Highs around 62. Lows
around 54.
.TUESDAY...Sunny. Highs around 65.

&&

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

.TODAY...Partly sunny through early afternoon then clearing. Highs
around 67. North winds 5 to 10 mph becoming southwest by mid
afternoon. Waves calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 59. Southwest winds 5 to
10 mph. Waves calm to 1 foot.
.THURSDAY...Partly cloudy. Highs 66 to 71. South winds 5 to 10 mph.
Waves calm to 1 foot.
.THURSDAY NIGHT...A 20 percent chance of showers and thunderstorms
late. Mostly cloudy. Lows around 61. South winds 5 to 10 mph
becoming southwest 5 to 15 mph late. Waves calm to 1 foot.
.FRIDAY...Partly cloudy with a slight chance of showers and
thunderstorms through early afternoon, then sunny with a chance of
showers and a slight chance of thunderstorms by mid afternoon. Highs
around 69 at the shore and 71 to 76 inland. Southwest winds 10 to
15 mph. Chance of precipitation 30 percent. Waves building to 1 to
2 feet.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows around 60. Highs
around 65.
.SATURDAY NIGHT AND SUNDAY...Mostly cloudy. Lows around 55. Highs
around 61.
.SUNDAY NIGHT...Mostly cloudy. Lows around 52.
.MONDAY AND MONDAY NIGHT...Partly cloudy. Highs around 63. Lows
around 54.
.TUESDAY...Sunny. Highs 64 to 69.

&&

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

.TODAY...Partly sunny through mid afternoon then clearing. Highs
around 68. North winds 5 to 10 mph becoming northeast by late
morning, then becoming south by early afternoon becoming southwest
late. Waves calm to 1 foot.
.TONIGHT...Mostly clear. Lows around 58. Southwest winds up to
10 mph. Waves calm to 1 foot.
.THURSDAY...Partly sunny. Highs 67 to 72. South winds up to 10 mph.
Waves calm to 1 foot.
.THURSDAY NIGHT...A 20 percent chance of showers and thunderstorms
late. Mostly cloudy. Lows around 61. South winds 5 to 10 mph
becoming southwest 5 to 15 mph late. Waves building to 1 to 2 feet.
.FRIDAY...A chance of showers and a slight chance of thunderstorms.
Partly sunny through early afternoon then clearing. Highs around
70 at the shore and 72 to 77 inland. Southwest winds 10 to 20 mph.
Chance of precipitation 30 percent. Waves building to 2 to 3 feet.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows around 60. Highs
around 65.
.SATURDAY NIGHT...Mostly cloudy. Lows around 55.
.SUNDAY...A chance of rain showers through early afternoon. Partly
sunny. Highs around 61. Chance of showers 30 percent.
.SUNDAY NIGHT...Mostly cloudy. Lows around 52.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 64 to 69. Lows around
54.

&&


$$