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MIZ001-120800-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 PM EDT Thu Sep 11 2025

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

.TONIGHT...Mostly cloudy. Patchy fog through midnight. Areas of fog
late, then patchy fog late. Lows around 54. Southeast winds up to
10 mph. Waves calm to 1 foot.
.FRIDAY...Patchy fog through early afternoon. A slight chance of
rain showers through early afternoon, then a chance of rain showers
and a slight chance of thunderstorms by mid afternoon. Mostly
cloudy. Highs 62 to 67. Southeast winds up to 10 mph. Chance of
precipitation 30 percent. Waves calm to 1 foot.
.FRIDAY NIGHT...A 30 percent chance of rain showers and
thunderstorms through midnight. Mostly cloudy. Lows around 57.
Southeast winds 5 to 10 mph becoming northeast late. Waves calm to
1 foot.
.SATURDAY...Partly sunny through early afternoon then clearing.
Highs around 65. Northeast winds 5 to 10 mph. Waves calm to 1 foot.
.SATURDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 55. Northeast winds 5 to 10 mph. Waves
calm to 1 foot.
.SUNDAY...Partly sunny. Highs 63 to 68.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy. Lows around 58.
Highs 68 to 73.
.WEDNESDAY...A chance of rain showers by mid afternoon. Partly
sunny. Highs 66 to 71. Chance of showers 30 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows
around 56. Chance of showers 40 percent.
.THURSDAY...A chance of rain showers by mid afternoon. Mostly
cloudy. Highs around 60 at the shore and 63 to 68 inland. Chance of
showers 30 percent.

&&

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

.TONIGHT...Mostly cloudy. Patchy fog through midnight. Areas of
dense fog late. Lows around 53. Southeast winds up to 10 mph. Waves
calm to 1 foot.
.FRIDAY...Patchy fog through early afternoon. A slight chance of
rain showers through early afternoon, then a chance of rain showers
and a slight chance of thunderstorms by mid afternoon. Mostly
cloudy. Highs 59 to 64. Southeast winds 5 to 10 mph. Chance of
precipitation 30 percent. Waves calm to 1 foot.
.FRIDAY NIGHT...A chance of rain showers and thunderstorms through
midnight, then a slight chance of rain showers and thunderstorms
late. Mostly cloudy. Lows around 55. Southeast winds 5 to 10 mph
becoming northeast late. Chance of precipitation 30 percent. Waves
calm to 1 foot.
.SATURDAY...Partly sunny through early afternoon then becoming
mostly sunny. Highs 60 to 65. Northeast winds 5 to 10 mph. Waves
calm to 1 foot.
.SATURDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 54. East winds 5 to 15 mph. Waves calm to
1 foot.
.SUNDAY...Partly sunny. Highs 59 to 64.
.SUNDAY NIGHT...Partly cloudy. Lows around 56.
.MONDAY...Sunny. Highs 63 to 68.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy. Lows around 57.
Highs around 64 at the shore and 66 to 71 inland.
.WEDNESDAY...Partly sunny. Highs 63 to 68.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows
around 55. Chance of showers 30 percent.
.THURSDAY...Mostly cloudy. Highs 58 to 63.

&&

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

.TONIGHT...Mostly cloudy. Patchy fog through midnight. Areas of
dense fog late. Lows around 54. Southeast winds up to 10 mph. Waves
calm to 1 foot.
.FRIDAY...Areas of dense fog through early afternoon. A slight
chance of rain showers through early afternoon, then a chance of
rain showers and a slight chance of thunderstorms by mid afternoon.
Mostly cloudy. Highs 61 to 66. Southeast winds 5 to 10 mph. Chance
of precipitation 30 percent. Waves calm to 1 foot.
.FRIDAY NIGHT...A chance of rain showers and thunderstorms through
midnight, then a slight chance of rain showers late. Mostly cloudy.
Lows around 56. Southeast winds 5 to 10 mph becoming northeast late.
Chance of precipitation 30 percent. Waves calm to 1 foot.
.SATURDAY...Partly sunny through early afternoon then clearing.
Highs 61 to 66. Northeast winds 5 to 10 mph. Waves calm to 1 foot.
.SATURDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 55. East winds 5 to 15 mph. Waves calm to
1 foot.
.SUNDAY...Partly sunny. Highs around 61 at the shore and 63 to
68 inland.
.SUNDAY NIGHT...Partly cloudy. Lows around 56.
.MONDAY...Sunny. Highs around 63 at the shore and 67 to 72 inland.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy. Lows around 58.
Highs around 64 at the shore and 68 to 73 inland.
.WEDNESDAY...Partly sunny. Highs around 65 at the shore and 67 to
72 inland.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows
around 55. Chance of showers 30 percent.
.THURSDAY...Mostly cloudy. Highs around 60 at the shore and 63 to
68 inland.

&&

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

.TONIGHT...Mostly cloudy. Patchy fog through midnight. Areas of
dense fog late. Lows around 54. Southeast winds up to 10 mph
becoming up to 5 mph late. Waves calm to 1 foot.
.FRIDAY...Patchy fog through early afternoon. A slight chance of
rain showers through early afternoon, then a slight chance of rain
showers and thunderstorms by mid afternoon. Mostly cloudy. Highs
60 to 65. Southeast winds up to 10 mph becoming 5 to 10 mph late.
Chance of precipitation 20 percent. Waves calm to 1 foot.
.FRIDAY NIGHT...A chance of rain showers and thunderstorms through
midnight, then a slight chance of rain showers and thunderstorms
late. Mostly cloudy. Lows around 56. East winds 5 to 10 mph becoming
northeast late. Chance of precipitation 30 percent. Waves calm to
1 foot.
.SATURDAY...Partly sunny through early afternoon then becoming
mostly sunny. Highs 62 to 67. Northeast winds up to 10 mph. Waves
calm to 1 foot.
.SATURDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 55. East winds 5 to 10 mph. Waves calm to
1 foot.
.SUNDAY...Partly sunny. Highs around 61 at the shore and 63 to
68 inland.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy. Lows around 57.
Highs 67 to 72.
.WEDNESDAY...A chance of rain showers by mid afternoon. Partly
sunny. Highs around 65 at the shore and 67 to 72 inland. Chance of
showers 30 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows
around 55. Chance of showers 40 percent.
.THURSDAY...A chance of rain showers by mid afternoon. Mostly
cloudy. Highs around 60 at the shore and 62 to 67 inland. Chance of
showers 30 percent.

&&


$$