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MIZ001-140800-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 PM EDT Wed Aug 13 2025

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

.TONIGHT...Partly cloudy. Lows around 56. East winds 5 to 10 mph.
Waves calm to 1 foot.
.THURSDAY...Sunny through early afternoon then becoming partly
cloudy. Highs 65 to 70. Southeast winds 5 to 15 mph. Waves building
to 1 to 2 feet.
.THURSDAY NIGHT...Warm. A 20 percent chance of showers and
thunderstorms late. Mostly cloudy. Lows around 65. Southeast winds
10 to 15 mph becoming south 10 to 20 mph late. Waves building to
2 to 4 feet.
.FRIDAY...Warmer. A slight chance of showers through early
afternoon, then a slight chance of showers and thunderstorms by mid
afternoon. Partly cloudy. Highs around 70 at the shore and 75 to
80 inland. Southwest winds 10 to 20 mph. Chance of precipitation
20 percent. Waves subsiding to 1 to 2 feet.
.FRIDAY NIGHT...Warm. Partly cloudy with a chance of showers and
thunderstorms through midnight, then mostly cloudy with a chance of
showers and a slight chance of thunderstorms late. Lows around 66.
Southwest winds 5 to 15 mph becoming northwest 5 to 10 mph late.
Chance of precipitation 40 percent. Waves subsiding to calm to
1 foot.
.SATURDAY...Partly cloudy with a chance of showers through early
afternoon, then sunny by mid afternoon. Highs around 67 at the shore
and 71 to 76 inland. Chance of showers 30 percent.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows around 61. Highs
around 64.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly cloudy. Lows around 62.
Highs 64 to 69.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 67. Lows
around 62.
.WEDNESDAY...Sunny. Highs around 70.

&&

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

.TONIGHT...Partly cloudy. Lows around 56. Northeast winds 5 to
10 mph becoming east late. Waves calm to 1 foot.
.THURSDAY...Sunny through early afternoon then becoming partly
cloudy. Highs around 64. Southeast winds 5 to 15 mph. Waves building
to 2 to 3 feet.
.THURSDAY NIGHT...A 20 percent chance of rain showers and
thunderstorms late. Mostly cloudy. Lows 60 to 65. Southeast winds
10 to 20 mph becoming south 10 to 15 mph late. Waves 2 to 3 feet.
.FRIDAY...Warmer. A slight chance of showers through early
afternoon, then a slight chance of showers and thunderstorms by mid
afternoon. Partly cloudy. Highs 70 to 75. Southwest winds 10 to
15 mph. Chance of precipitation 20 percent. Waves building to 2 to
4 feet subsiding to 1 to 2 feet.
.FRIDAY NIGHT...A slight chance of showers and thunderstorms through
midnight, then a chance of showers and a slight chance of
thunderstorms late. Mostly cloudy. Lows 61 to 66. Southwest winds
5 to 15 mph becoming northwest 5 to 10 mph late. Chance of
precipitation 30 percent. Waves subsiding to calm to 1 foot.
.SATURDAY...A chance of showers through early afternoon. Partly
cloudy. Highs 66 to 71. Chance of showers 30 percent.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows around 58. Highs
around 62.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly cloudy. Lows around 60.
Highs around 64.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 64. Lows
58 to 63.
.WEDNESDAY...Sunny. Highs around 67.

&&

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

.TONIGHT...Partly cloudy. Lows around 56. Northeast winds 5 to
10 mph becoming east late. Waves calm to 1 foot.
.THURSDAY...Sunny through early afternoon then becoming partly
cloudy. Highs 64 to 69. Southeast winds 5 to 15 mph. Waves building
to 1 to 2 feet.
.THURSDAY NIGHT...A 20 percent chance of showers and thunderstorms
late. Mostly cloudy. Lows 62 to 67. Southeast winds 10 to 15 mph
becoming south late. Waves building to 2 to 3 feet.
.FRIDAY...Warmer. A slight chance of showers through early
afternoon, then a slight chance of showers and thunderstorms by mid
afternoon. Partly cloudy. Highs around 71 at the shore and 74 to
79 inland. Southwest winds 10 to 20 mph. Chance of precipitation
20 percent. Waves subsiding to 1 to 2 feet.
.FRIDAY NIGHT...Partly cloudy with a slight chance of showers and
thunderstorms through midnight, then mostly cloudy with a chance of
showers and a slight chance of thunderstorms late. Lows 63 to 68.
Southwest winds 5 to 15 mph becoming northwest 5 to 10 mph late.
Chance of precipitation 30 percent. Waves subsiding to calm to
1 foot.
.SATURDAY...Partly cloudy with a chance of showers through early
afternoon, then sunny by mid afternoon. Highs around 67 at the shore
and 69 to 74 inland. Chance of showers 30 percent.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows 57 to 62. Highs
around 63.
.SUNDAY NIGHT...Mostly cloudy. Lows 60 to 65.
.MONDAY...Partly cloudy. Highs 63 to 68.
.MONDAY NIGHT...Mostly cloudy. Lows 59 to 64.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs around 66. Lows
60 to 65.
.WEDNESDAY...Sunny. Highs around 69.

&&

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

.TONIGHT...Partly cloudy. Lows around 56. Northeast winds 5 to
10 mph. Waves calm to 1 foot.
.THURSDAY...Mostly sunny. Highs around 66. East winds 5 to 15 mph.
Waves building to 2 to 3 feet.
.THURSDAY NIGHT...A 20 percent chance of rain showers and
thunderstorms late. Mostly cloudy. Lows 61 to 66. Southeast winds
10 to 15 mph becoming south 10 to 20 mph late. Waves building to
2 to 4 feet.
.FRIDAY...Warmer. A slight chance of showers through early
afternoon, then a slight chance of showers and thunderstorms by mid
afternoon. Partly cloudy. Highs around 72 at the shore and 74 to
79 inland. Southwest winds 10 to 20 mph. Chance of precipitation
20 percent. Waves subsiding to 1 to 2 feet.
.FRIDAY NIGHT...A chance of showers and thunderstorms through
midnight, then a chance of showers and a slight chance of
thunderstorms late. Mostly cloudy. Lows 62 to 67. Southwest winds
5 to 15 mph becoming northwest 5 to 10 mph late. Chance of
precipitation 40 percent. Waves subsiding to calm to 1 foot.
.SATURDAY...Partly sunny with a chance of showers through early
afternoon, then mostly sunny by mid afternoon. Highs 68 to 73.
Chance of showers 40 percent.
.SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows around 59. Highs
62 to 67.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly cloudy. Lows 58 to 63.
Highs 63 to 68.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs 64 to 69. Lows
59 to 64.
.WEDNESDAY...Sunny. Highs 67 to 72.

&&


$$