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MIZ001-112000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Mon Aug 11 2025

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

.TODAY...Sunny. Highs around 72 at the shore and 77 to 82 inland.
West winds 5 to 10 mph becoming southwest 10 to 15 mph by mid
afternoon. Waves calm to 1 foot building to 1 to 2 feet.
.TONIGHT...Warm. Partly cloudy through midnight, then mostly cloudy
with a 20 percent chance of showers and thunderstorms late. Haze.
Lows around 67. Southwest winds 5 to 15 mph. Waves subsiding to calm
to 1 foot building to 2 to 3 feet.
.TUESDAY...Partly cloudy with a 20 percent chance of showers and
thunderstorms. Highs around 72 at the shore and 76 to 81 inland.
Southwest winds 10 to 20 mph becoming west late. Waves building to
2 to 4 feet.
.TUESDAY NIGHT...Mostly clear. Lows around 61. West winds 10 to
15 mph becoming northwest late. Waves subsiding to calm to 1 foot.
.WEDNESDAY...Sunny. Highs around 69 at the shore and 74 to
79 inland. Northwest winds 5 to 15 mph becoming southwest 5 to
10 mph late. Waves calm to 1 foot.
.WEDNESDAY NIGHT...Mostly clear. Lows around 61.
.THURSDAY...Mostly sunny. Highs around 69 at the shore and 75 to
80 inland.
.THURSDAY NIGHT...Warm. A chance of showers and thunderstorms late.
Mostly cloudy. Lows around 65. Chance of precipitation 40 percent.
.FRIDAY...Warm. A chance of showers through early afternoon. Partly
cloudy. Highs around 74 at the shore and 80 to 85 inland. Chance of
showers 30 percent.
.FRIDAY NIGHT...Warm. A chance of showers late. Mostly cloudy. Lows
around 66. Chance of showers 30 percent.
.SATURDAY...A chance of showers through early afternoon. Partly
cloudy. Highs around 72 at the shore and 77 to 82 inland. Chance of
showers 30 percent.
.SATURDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 62.
.SUNDAY...Partly cloudy. Highs around 68 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. Highs around 69 at the shore and 75 to 80 inland.
West winds 5 to 10 mph becoming southwest 10 to 15 mph by mid
afternoon. Waves calm to 1 foot building to 1 to 2 feet.
.TONIGHT...Haze. A 20 percent chance of showers late. Partly cloudy.
Lows around 64. Southwest winds 5 to 15 mph. Waves subsiding to calm
to 1 foot building to 2 to 3 feet.
.TUESDAY...Haze through early afternoon. A slight chance of showers
and thunderstorms through early afternoon, then a chance of showers
and a slight chance of thunderstorms by mid afternoon. Partly
cloudy. Highs around 70 at the shore and 73 to 78 inland. Southwest
winds 15 to 20 mph becoming west 10 to 15 mph late. Chance of
precipitation 30 percent. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Partly cloudy. Lows around 60. West winds 10 to
15 mph becoming northwest late. Waves subsiding to 1 to 2 feet.
.WEDNESDAY...Sunny. Highs around 66 at the shore and 70 to
75 inland. Northwest winds 5 to 15 mph becoming west 5 to 10 mph
late. Waves subsiding to calm to 1 foot.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 59. Highs
around 67 at the shore and 72 to 77 inland.
.THURSDAY NIGHT...A chance of showers late. Mostly cloudy. Lows
around 63. Chance of showers 30 percent.
.FRIDAY...Partly cloudy. Highs around 71 at the shore and 76 to
81 inland.
.FRIDAY NIGHT...A chance of showers late. Mostly cloudy. Lows around
63. Chance of showers 30 percent.
.SATURDAY...A chance of showers through early afternoon. Partly
cloudy. Highs around 68 at the shore and 74 to 79 inland. Chance of
showers 30 percent.
.SATURDAY NIGHT...Mostly cloudy. Lows around 60.
.SUNDAY...Partly cloudy. Highs around 65 at the shore and 70 to
75 inland.

&&

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

.TODAY...Sunny. Highs around 71 at the shore and 78 to 83 inland.
West winds 5 to 10 mph becoming southwest 10 to 15 mph by mid
afternoon. Waves calm to 1 foot building to 1 to 2 feet.
.TONIGHT...Partly cloudy through midnight, then mostly cloudy with a
20 percent chance of showers and thunderstorms late. Haze. Lows
64 to 69. Southwest winds 10 to 15 mph. Waves subsiding to calm to
1 foot building to 1 to 2 feet.
.TUESDAY...Haze through early afternoon. A slight chance of showers
and thunderstorms through early afternoon, then a chance of showers
and a slight chance of thunderstorms by mid afternoon. Partly
cloudy. Highs around 70 at the shore and 77 to 82 inland. Southwest
winds 15 to 20 mph becoming west 10 to 15 mph late. Chance of
precipitation 30 percent. Waves building to 2 to 3 feet.
.TUESDAY NIGHT...Partly cloudy. Lows around 62. West winds 10 to
15 mph becoming northwest late. Waves subsiding to 1 to 2 feet.
.WEDNESDAY...Sunny. Highs around 67 at the shore and 74 to
79 inland. Northwest winds 5 to 15 mph becoming west 5 to 10 mph
late. Waves subsiding to calm to 1 foot.
.WEDNESDAY NIGHT...Mostly clear. Lows around 60.
.THURSDAY...Sunny through early afternoon then becoming partly
cloudy. Highs around 67 at the shore and 74 to 79 inland.
.THURSDAY NIGHT...A chance of showers late. Mostly cloudy. Lows
62 to 67. Chance of showers 30 percent.
.FRIDAY...Warm. Partly cloudy. Highs around 72 at the shore and
80 to 85 inland.
.FRIDAY NIGHT...A chance of showers late. Mostly cloudy. Lows 63 to
68. Chance of showers 30 percent.
.SATURDAY...Partly cloudy. Highs around 69 at the shore and 76 to
81 inland.
.SATURDAY NIGHT...Mostly cloudy. Lows 59 to 64.
.SUNDAY...Mostly sunny. Highs around 66 at the shore and 73 to
78 inland.

&&

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

.TODAY...Sunny. Highs around 69 at the shore and 77 to 82 inland.
West winds 5 to 10 mph becoming southwest 10 to 15 mph late. Waves
calm to 1 foot building to 1 to 2 feet.
.TONIGHT...Partly cloudy through midnight, then mostly cloudy with a
20 percent chance of showers and thunderstorms late. Haze. Lows
63 to 68. Southwest winds 5 to 15 mph. Waves subsiding to calm to
1 foot building to 2 to 3 feet.
.TUESDAY...A 20 percent chance of showers and thunderstorms. Partly
sunny through early afternoon then becoming mostly sunny. Highs
around 71 at the shore and 75 to 80 inland. Southwest winds 15 to
20 mph becoming west 10 to 20 mph late. Waves building to 2 to
4 feet.
.TUESDAY NIGHT...Partly cloudy. Lows around 61. West winds 10 to
15 mph becoming northwest late. Waves subsiding to calm to 1 foot.
.WEDNESDAY...Sunny. Highs around 66 at the shore and 73 to
78 inland. Northwest winds 5 to 10 mph becoming southwest late.
Waves calm to 1 foot.
.WEDNESDAY NIGHT...Mostly clear. Lows around 60.
.THURSDAY...Partly cloudy. Highs around 67 at the shore and 75 to
80 inland.
.THURSDAY NIGHT...A chance of showers late. Mostly cloudy. Lows
62 to 67. Chance of showers 40 percent.
.FRIDAY...A chance of showers through early afternoon. Partly sunny.
Highs around 71 at the shore and 79 to 84 inland. Chance of showers
30 percent.
.FRIDAY NIGHT...A chance of showers late. Mostly cloudy. Lows 62 to
67. Chance of showers 30 percent.
.SATURDAY...A chance of showers through early afternoon. Partly
sunny. Highs around 69 at the shore and 76 to 81 inland. Chance of
showers 30 percent.
.SATURDAY NIGHT...Mostly cloudy. Lows 59 to 64.
.SUNDAY...Partly cloudy. Highs around 64 at the shore and 72 to
77 inland.

&&


$$