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MIZ001-152000-
Recreational Forecast for Isle Royale National Park
National Weather Service Marquette MI
501 AM EDT Thu May 15 2025

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

.TODAY...Much cooler. Mostly cloudy. Areas of dense fog early, then
patchy dense fog by late morning. A chance of rain showers early,
then a slight chance of rain showers by late morning. A slight
chance of rain showers and thunderstorms late. Highs around 52 at
the shore and 56 to 61 inland. East winds 5 to 15 mph increasing to
15 to 20 mph late. Waves calm to 1 foot building to 2 to 3 feet.
.TONIGHT...Rain showers likely and a chance of thunderstorms through
midnight, then a slight chance of rain showers and thunderstorms
late. Patchy fog. Mostly cloudy. Lows around 44. East winds 15 to
20 mph becoming south 10 to 15 mph late. Chance of precipitation
70 percent. Waves building to 2 to 4 feet.
.FRIDAY...Warmer. A 50 percent chance of rain showers by mid
afternoon. Mostly cloudy. Highs around 51 at the shore and 61 to
66 inland. Southeast winds 10 to 15 mph becoming south by early
afternoon, then becoming north 5 to 10 mph late. Waves subsiding to
1 to 2 feet.
.FRIDAY NIGHT...Mostly cloudy with a 50 percent chance of rain
showers. Lows around 40. Northeast winds 5 to 10 mph becoming north
5 to 15 mph late. Waves subsiding to calm to 1 foot building to 2 to
3 feet.
.SATURDAY...Breezy, cooler. A 20 percent chance of rain showers
through early afternoon. Mostly cloudy. Highs 47 to 52. North winds
10 to 20 mph increasing to 15 to 25 mph by mid afternoon. Waves
building to 3 to 5 feet.
.SATURDAY NIGHT...Breezy. Mostly cloudy. Lows around 35.
.SUNDAY...Partly sunny through early afternoon then becoming mostly
sunny. Highs 45 to 50.
.SUNDAY NIGHT...Mostly clear. Lows around 37.
.MONDAY...Mostly sunny. Highs around 46 at the shore and 48 to
53 inland.
.MONDAY NIGHT...Mostly cloudy. Lows around 38.
.TUESDAY...Mostly cloudy with a 40 percent chance of rain showers.
Highs around 48 at the shore and 50 to 55 inland.
.TUESDAY NIGHT...Cloudy with a 50 percent chance of rain showers.
Lows around 41.
.WEDNESDAY...Mostly cloudy with a 50 percent chance of rain showers.
Highs 49 to 54.

&&

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

.TODAY...Breezy, cooler. A chance of rain showers early, then a
slight chance of rain showers by late morning. Areas of dense fog.
Cloudy. Highs 47 to 52. East winds 10 to 20 mph. Waves 2 to 3 feet
building to 3 to 5 feet.
.TONIGHT...Breezy. Rain showers likely and a chance of thunderstorms
through midnight, then a chance of rain showers and a slight chance
of thunderstorms late. Patchy fog. Mostly cloudy. Lows around 42.
East winds 15 to 25 mph becoming south 10 to 20 mph late. Chance of
precipitation 70 percent. Waves building to 4 to 7 feet.
.FRIDAY...A 40 percent chance of rain showers by mid afternoon.
Mostly cloudy. Highs around 47 at the shore and 51 to 56 inland.
Southeast winds 10 to 15 mph becoming north 5 to 10 mph late. Waves
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 40. East winds 5 to 15 mph becoming north late.
Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet.
.SATURDAY...Windy. A 20 percent chance of rain showers through early
afternoon. Mostly cloudy. Highs 44 to 49. North winds 10 to 20 mph
increasing to 20 to 30 mph by late morning. Waves building to 3 to
6 feet.
.SATURDAY NIGHT AND SUNDAY...Breezy, cool. Mostly cloudy. Lows
around 35. Highs 41 to 46.
.SUNDAY NIGHT...Mostly clear. Lows around 37.
.MONDAY...Cool. Mostly sunny. Highs 43 to 48.
.MONDAY NIGHT...Mostly cloudy. Lows around 38.
.TUESDAY...A chance of rain showers by mid afternoon. Partly sunny.
Highs 45 to 50. Chance of showers 40 percent.
.TUESDAY NIGHT AND WEDNESDAY...Cool. Mostly cloudy with a 50 percent
chance of rain showers. Lows around 40. Highs 45 to 50.

&&

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

.TODAY...Breezy, cooler. A chance of rain showers early, then a
slight chance of rain showers by late morning. Areas of dense fog
through mid afternoon. Cloudy. Highs around 47 at the shore and
51 to 56 inland. East winds 10 to 20 mph. Waves 2 to 3 feet building
to 2 to 4 feet.
.TONIGHT...Breezy. Rain showers likely and a chance of thunderstorms
through midnight, then a chance of rain showers and a slight chance
of thunderstorms late. Patchy fog. Mostly cloudy. Lows around 42.
East winds 15 to 25 mph becoming south 10 to 20 mph late. Chance of
precipitation 70 percent. Waves building to 3 to 6 feet.
.FRIDAY...A 40 percent chance of rain showers by mid afternoon.
Mostly cloudy. Highs around 48 at the shore and 55 to 60 inland.
Southeast winds 10 to 15 mph becoming northeast 5 to 10 mph late.
Waves subsiding to 2 to 3 feet.
.FRIDAY NIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows around 39. East winds 5 to 15 mph becoming north late.
Waves subsiding to 1 to 2 feet building to 2 to 3 feet.
.SATURDAY...Windy. A 20 percent chance of rain showers through early
afternoon. Mostly cloudy. Highs 46 to 51. North winds 10 to 20 mph
increasing to 20 to 30 mph by late morning. Waves building to 3 to
6 feet.
.SATURDAY NIGHT AND SUNDAY...Breezy, cool. Mostly cloudy. Lows
around 35. Highs 44 to 49.
.SUNDAY NIGHT...Mostly clear. Lows around 37.
.MONDAY...Mostly sunny. Highs around 45 at the shore and 47 to
52 inland.
.MONDAY NIGHT...Mostly cloudy. Lows around 38.
.TUESDAY...A chance of rain showers by mid afternoon. Partly sunny.
Highs 47 to 52. Chance of showers 40 percent.
.TUESDAY NIGHT...Breezy. Cloudy with a 50 percent chance of rain
showers. Lows around 40.
.WEDNESDAY...Mostly cloudy with a 50 percent chance of rain showers.
Highs 47 to 52.

&&

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

.TODAY...Cooler. A chance of rain showers early, then a slight
chance of rain showers by late morning. Areas of dense fog through
mid afternoon. Patchy dense fog late. Mostly cloudy. Highs around
48 at the shore and 55 to 60 inland. East winds 5 to 15 mph
increasing to 15 to 20 mph late. Waves 2 to 3 feet building to 3 to
5 feet.
.TONIGHT...Breezy. Rain showers likely and a chance of thunderstorms
through midnight, then a chance of rain showers and a slight chance
of thunderstorms late. Patchy fog. Mostly cloudy. Lows around 43.
East winds 15 to 25 mph becoming south 10 to 20 mph late. Chance of
precipitation 70 percent. Waves building to 3 to 6 feet.
.FRIDAY...A 50 percent chance of rain showers by mid afternoon.
Mostly cloudy. Highs around 50 at the shore and 58 to 63 inland.
Southeast winds 5 to 15 mph becoming north late. Waves subsiding to
1 to 2 feet.
.FRIDAY NIGHT...Mostly cloudy with a 50 percent chance of rain
showers. Lows around 40. Northeast winds 5 to 10 mph becoming north
5 to 15 mph late. Waves subsiding to calm to 1 foot.
.SATURDAY...Breezy. A 20 percent chance of rain showers through
early afternoon. Mostly cloudy. Highs 46 to 51. North winds 10 to
20 mph increasing to 15 to 25 mph by mid afternoon. Waves building
to 1 to 2 feet.
.SATURDAY NIGHT...Mostly cloudy. Lows around 35.
.SUNDAY...Cool. Partly sunny through early afternoon then becoming
mostly sunny. Highs around 43 at the shore and 45 to 50 inland.
.SUNDAY NIGHT...Mostly clear. Lows around 37.
.MONDAY...Mostly sunny. Highs around 44 at the shore and 46 to
51 inland.
.MONDAY NIGHT...Mostly cloudy. Lows around 38.
.TUESDAY...Partly sunny with a 40 percent chance of rain showers.
Highs around 47 at the shore and 49 to 54 inland.
.TUESDAY NIGHT...Cloudy with a 50 percent chance of rain showers.
Lows around 41.
.WEDNESDAY...Mostly cloudy with a 50 percent chance of rain showers.
Highs around 47 at the shore and 49 to 54 inland.

&&


$$