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SXUS43 KMQT 182101
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MIZ001-190800-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 PM EDT Mon Aug 18 2025

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

.TONIGHT...A 20 percent chance of showers through midnight. Cloudy.
Lows around 60. Southeast winds 5 to 10 mph becoming northeast late.
Waves 1 to 2 feet subsiding to calm to 1 foot.
.TUESDAY...Partly sunny. Highs around 66. North winds 5 to 15 mph.
Waves calm to 1 foot.
.TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly
cloudy. Lows around 59. Northwest winds up to 5 mph becoming west by
midnight, then becoming northwest late becoming north late. Waves
calm to 1 foot.
.WEDNESDAY...Sunny. Highs around 68 at the shore and 70 to
75 inland. North winds up to 5 mph becoming east by late morning,
then becoming south by mid afternoon. Waves calm to 1 foot.
.WEDNESDAY NIGHT...Partly cloudy. Lows around 60. Southwest winds up
to 10 mph. Waves calm to 1 foot.
.THURSDAY...Mostly sunny. Highs 68 to 73.
.THURSDAY NIGHT...A chance of showers late. Mostly cloudy. Lows
around 63. Chance of showers 40 percent.
.FRIDAY...Partly cloudy through early afternoon then clearing. Highs
around 75.
.FRIDAY NIGHT...Mostly clear. Lows around 59.
.SATURDAY...Cooler. Sunny through early afternoon then becoming
partly cloudy. Highs around 66.
.SATURDAY NIGHT...Partly cloudy through midnight then becoming
mostly cloudy. Lows around 54.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs around 64. Lows
around 54.
.MONDAY...Sunny. Highs around 66.

&&

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

.TONIGHT...A 20 percent chance of showers through midnight. Cloudy.
Lows around 60. Southeast winds 5 to 15 mph becoming east 5 to
10 mph late. Waves 2 to 4 feet.
.TUESDAY...Mostly cloudy through early afternoon then becoming
partly cloudy. Highs around 65. North winds 5 to 15 mph. Waves
subsiding to 1 to 2 feet.
.TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly
cloudy. Lows around 59. Northwest winds up to 5 mph becoming north
late. Waves subsiding to calm to 1 foot.
.WEDNESDAY...Mostly sunny. Highs around 67 at the shore and 69 to
74 inland. North winds up to 5 mph becoming northeast by late
morning, then becoming south by mid afternoon. Waves calm to 1 foot.
.WEDNESDAY NIGHT...Partly cloudy. Lows around 60. Southwest winds up
to 10 mph. Waves calm to 1 foot.
.THURSDAY...Partly cloudy. Highs 67 to 72.
.THURSDAY NIGHT...A chance of showers late. Mostly cloudy. Lows
around 63. Chance of showers 40 percent.
.FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs around 73. Lows
around 60.
.SATURDAY...Sunny through early afternoon then becoming partly
cloudy. Highs around 66.
.SATURDAY NIGHT...Mostly cloudy. Lows around 55.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs around 64. Lows
around 55.
.MONDAY...Sunny. Highs around 65.

&&

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

.TONIGHT...A 20 percent chance of showers through midnight. Cloudy.
Lows around 60. Southeast winds 5 to 15 mph becoming east 5 to
10 mph late. Waves 2 to 4 feet subsiding to 1 to 2 feet.
.TUESDAY...Partly sunny. Highs around 65. North winds 5 to 15 mph.
Waves 1 to 2 feet.
.TUESDAY NIGHT...Partly cloudy. Lows around 59. Northwest winds 5 to
10 mph becoming north late. Waves subsiding to calm to 1 foot.
.WEDNESDAY...Sunny. Highs 68 to 73. North winds 5 to 10 mph becoming
northeast by late morning, then becoming south by mid afternoon.
Waves calm to 1 foot.
.WEDNESDAY NIGHT...Partly cloudy. Lows around 59. Southwest winds
5 to 10 mph. Waves calm to 1 foot.
.THURSDAY...Mostly sunny. Highs 68 to 73.
.THURSDAY NIGHT...A chance of showers and thunderstorms late. Mostly
cloudy. Lows around 63. Chance of precipitation 40 percent.
.FRIDAY...Partly cloudy through early afternoon then clearing. Highs
around 74.
.FRIDAY NIGHT...Mostly clear. Lows around 59.
.SATURDAY...Sunny through early afternoon then becoming partly
cloudy. Highs around 66.
.SATURDAY NIGHT...Mostly cloudy. Lows around 54.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs around 64. Lows
around 55.
.MONDAY...Sunny. Highs around 65.

&&

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

.TONIGHT...A 20 percent chance of showers through midnight. Cloudy.
Lows around 61. Southeast winds 5 to 15 mph decreasing to up to
5 mph late, then becoming northeast late. Waves 2 to 3 feet
subsiding to 1 to 2 feet.
.TUESDAY...Partly sunny. Highs around 67. North winds 5 to 10 mph.
Waves subsiding to calm to 1 foot.
.TUESDAY NIGHT...Mostly cloudy through midnight then becoming partly
cloudy. Lows around 59. North winds up to 5 mph. Waves calm to
1 foot.
.WEDNESDAY...Mostly sunny. Highs 68 to 73. North winds up to 5 mph
becoming east by late morning, then becoming south by mid afternoon.
Waves calm to 1 foot.
.WEDNESDAY NIGHT...Partly cloudy. Lows around 60. South winds up to
5 mph. Waves calm to 1 foot.
.THURSDAY...Partly cloudy. Highs around 70.
.THURSDAY NIGHT...A chance of showers late. Mostly cloudy. Lows
around 63. Chance of showers 40 percent.
.FRIDAY...Partly sunny through early afternoon then clearing. Highs
around 74.
.FRIDAY NIGHT...Mostly clear. Lows around 59.
.SATURDAY...Partly cloudy. Highs around 66.
.SATURDAY NIGHT...Mostly cloudy. Lows around 54.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs around 65. Lows
around 55.
.MONDAY...Sunny. Highs around 65.

&&


$$