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MIZ001-172000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Mon Aug 17 2026

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

.TODAY...Partly cloudy through mid afternoon, then a 20 percent
chance of rain showers late. Highs around 65 at the shore and 72 to
77 inland. Southwest winds 5 to 15 mph becoming 10 to 15 mph by mid
afternoon. Waves calm to 1 foot building to 2 to 3 feet.
.TONIGHT...A chance of rain showers and a slight chance of
thunderstorms through midnight, then a slight chance of rain showers
late. Mostly cloudy. Lows around 57. Southwest winds 10 to 15 mph
becoming west 5 to 15 mph late. Chance of precipitation 50 percent.
Waves subsiding to 1 to 2 feet.
.TUESDAY...Sunny. Highs around 66 at the shore and 71 to 76 inland.
West winds 5 to 15 mph becoming southwest by mid afternoon. Waves
subsiding to calm to 1 foot, then building to 2 to 3 feet.
.TUESDAY NIGHT...Mostly clear. Lows around 55. West winds 5 to
15 mph becoming northwest 5 to 10 mph late. Waves subsiding to calm
to 1 foot.
.WEDNESDAY...Sunny. Highs around 65 at the shore and 68 to
73 inland. Northwest winds 5 to 10 mph becoming southwest by mid
afternoon. Waves calm to 1 foot.
.WEDNESDAY NIGHT...Mostly clear. Lows around 54.
.THURSDAY...Mostly sunny. Highs around 67 at the shore and 70 to
75 inland.
.THURSDAY NIGHT...A 30 percent chance of rain showers. Partly cloudy
through midnight then becoming mostly cloudy. Lows 59 to 64.
.FRIDAY...Mostly cloudy with a chance of rain showers through early
afternoon, then partly cloudy with a chance of rain showers by mid
afternoon. Highs around 68 at the shore and 74 to 79 inland. Chance
of showers 40 percent.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows 57 to 62.
Highs around 67 at the shore and 73 to 78 inland.
.SUNDAY...Sunny. Highs around 65 at the shore and 72 to 77 inland.

&&

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

.TODAY...Sunny through mid afternoon, then partly cloudy with a
20 percent chance of rain showers late. Highs around 63 at the shore
and 70 to 75 inland. West winds 5 to 10 mph becoming southwest 5 to
15 mph by late morning. Waves calm to 1 foot building to 1 to
2 feet.
.TONIGHT...A chance of rain showers and a slight chance of
thunderstorms through midnight, then a slight chance of rain showers
late. Mostly cloudy. Lows around 56. Southwest winds 10 to 15 mph
becoming west 5 to 15 mph late. Chance of precipitation 50 percent.
Waves building to 2 to 3 feet subsiding to 1 to 2 feet.
.TUESDAY...Sunny. Highs around 65 at the shore and 68 to 73 inland.
Northwest winds 5 to 15 mph becoming west by mid afternoon. Waves
subsiding to calm to 1 foot, then building to 1 to 2 feet.
.TUESDAY NIGHT...Mostly clear. Lows around 55. West winds 5 to
15 mph becoming northwest 5 to 10 mph by midnight. Waves subsiding
to calm to 1 foot.
.WEDNESDAY...Sunny. Highs 63 to 68. Northwest winds 5 to 10 mph
becoming southwest by mid afternoon. Waves calm to 1 foot.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 55. Highs
around 62 at the shore and 66 to 71 inland.
.THURSDAY NIGHT...A 30 percent chance of rain showers. Partly cloudy
through midnight then becoming mostly cloudy. Lows 57 to 62.
.FRIDAY...A chance of rain showers. Partly sunny. Highs around 62 at
the shore and 72 to 77 inland. Chance of showers 40 percent.
.FRIDAY NIGHT...Mostly cloudy. Lows 56 to 61.
.SATURDAY THROUGH SUNDAY...Partly cloudy. Highs around 61 at the
shore and 72 to 77 inland. Lows 54 to 59.

&&

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

.TODAY...Sunny through mid afternoon, then partly cloudy with a
20 percent chance of rain showers late. Highs around 66 at the shore
and 72 to 77 inland. West winds 5 to 10 mph becoming southwest 10 to
15 mph late. Waves calm to 1 foot building to 2 to 3 feet.
.TONIGHT...A chance of rain showers and a slight chance of
thunderstorms through midnight, then a slight chance of rain showers
late. Mostly cloudy. Lows around 57. Southwest winds 10 to 15 mph
becoming west 5 to 15 mph late. Chance of precipitation 50 percent.
Waves subsiding to 1 to 2 feet.
.TUESDAY...Sunny. Highs around 67 at the shore and 71 to 76 inland.
West winds 5 to 15 mph. Waves subsiding to calm to 1 foot, then
building to 1 to 2 feet.
.TUESDAY NIGHT...Mostly clear. Lows around 55. West winds 5 to
15 mph becoming northwest by midnight. Waves subsiding to calm to
1 foot.
.WEDNESDAY...Sunny. Highs 67 to 72. Northwest winds 5 to 10 mph
becoming southwest by mid afternoon. Waves calm to 1 foot.
.WEDNESDAY NIGHT...Mostly clear. Lows around 55.
.THURSDAY...Mostly sunny. Highs around 66 at the shore and 69 to
74 inland.
.THURSDAY NIGHT...A 30 percent chance of rain showers. Partly cloudy
through midnight then becoming mostly cloudy. Lows 59 to 64.
.FRIDAY...A chance of rain showers. Partly sunny. Highs around 67 at
the shore and 74 to 79 inland. Chance of showers 40 percent.
.FRIDAY NIGHT...Partly cloudy through midnight then becoming mostly
cloudy. Lows 58 to 63.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs around 67 at the
shore and 74 to 79 inland. Lows 56 to 61.
.SUNDAY...Sunny. Highs around 65 at the shore and 72 to 77 inland.

&&

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

.TODAY...Partly cloudy through mid afternoon, then a 20 percent
chance of rain showers late. Highs around 65 at the shore and 70 to
75 inland. West winds 5 to 10 mph becoming southwest 5 to 15 mph by
late morning. Waves calm to 1 foot building to 2 to 3 feet.
.TONIGHT...A chance of rain showers and a slight chance of
thunderstorms through midnight, then a slight chance of rain showers
late. Mostly cloudy. Lows around 56. Southwest winds 10 to 15 mph
becoming northwest 5 to 10 mph late. Chance of precipitation
50 percent. Waves subsiding to calm to 1 foot.
.TUESDAY...Sunny. Highs around 65 at the shore and 69 to 74 inland.
Northwest winds 5 to 15 mph becoming southwest by mid afternoon.
Waves building to 1 to 2 feet.
.TUESDAY NIGHT...Mostly clear. Lows around 55. West winds 5 to
15 mph becoming northwest 5 to 10 mph late. Waves subsiding to calm
to 1 foot.
.WEDNESDAY...Sunny. Highs around 63 at the shore and 67 to
72 inland. Northwest winds 5 to 10 mph becoming southwest by mid
afternoon. Waves calm to 1 foot.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 54. Highs
around 65 at the shore and 69 to 74 inland.
.THURSDAY NIGHT...A 30 percent chance of rain showers. Partly cloudy
through midnight then becoming mostly cloudy. Lows 58 to 63.
.FRIDAY...A chance of rain showers. Partly sunny. Highs around 63 at
the shore and 73 to 78 inland. Chance of showers 40 percent.
.FRIDAY NIGHT...Mostly cloudy. Lows 56 to 61.
.SATURDAY THROUGH SUNDAY...Partly cloudy. Highs around 62 at the
shore and 72 to 77 inland. Lows 56 to 61 inland and around 54 at the
shore.

&&


$$