Fisherman Island is an island in Lake Michigan on the western shore of Charlevoix County, Michigan. The island part of the 2,678-acre Fisherman's Island State Park. The island becomes a peninsula with the mainland, when water levels are low in Lake Michigan.

Fisherman Island Climate chart (explanation) J F M A M J J A S O N D     79     −7 −13     56     −12 −18     56     −2 −11     117     5 −4     101     11 6     80     17 9     88     20 15     66     19 14     124     18 13     156     10 6     112     8 0     69     −2 −4 █ Average max. and min. temperatures in °C █ Precipitation totals in mm Source: Imperial conversion J F M A M J J A S O N D     3.1     19 9     2.2     10 0     2.2     28 12     4.6     41 25     4     52 43     3.1     63 48     3.5     68 59     2.6     66 57     4.9     64 55     6.1     50 43     4.4     46 32     2.7     28 25 █ Average max. and min. temperatures in °F █ Precipitation totals in inches