When Does Island Lake Freeze? Typical Ice-In Nov 13, Ice-Out Apr 25
Island Lake in Itasca County, Minnesota usually freezes over around Nov 13, and usually has ice-out around Apr 25, based on Minnesota DNR ice observations recorded between 2002-2015. That works out to roughly 202 days of open water a year. These are typical dates across many winters, not a forecast — individual years swing by weeks in either direction.
Ice record for Island Lake
| Typical freeze-up (ice-in) | Nov 13 |
| Typical ice-out | Apr 25 |
| Earliest freeze-up on record | Nov 8, 2003 |
| Latest freeze-up on record | Nov 27, 2015 |
| Earliest ice-out on record | Apr 19, 2002 |
| Latest ice-out on record | Apr 27, 2003 |
| Open-water season | ~202 days |
| Winters observed | 6 |
| Location | Itasca County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Island Lake has usually iced over — it does not tell you the ice is safe, and we hold no thickness measurement for this or any lake. The Minnesota DNR is explicit that no ice is ever completely safe: thickness varies across a single lake, and current, springs, aerators, and insulating snow all weaken it. Ice that held a truck last week may not hold a person today.
Read the ice-thickness guidelines before going out, and check current conditions with the Minnesota DNR ice-safety page and local bait shops, which track conditions lake by lake.
How much the timing varies
Ice-out on Island Lake has landed as early as Apr 19, 2002 and as late as Apr 27, 2003 — a spread of weeks around the Apr 25 median. Freeze-up has ranged from Nov 8, 2003 to Nov 27, 2015. That year-to-year swing is why a median date is a planning tool, not a schedule. Freeze-up is driven by accumulated cold after the lake turns over in fall; ice-out by late-winter air temperature, sun angle, and how much snow sits on top of the ice reflecting it. Island Lake carries an overall water-quality grade of C — the full breakdown is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2002-2015.