When Does Serpent Lake Freeze? Typical Ice-In Dec 4, Ice-Out Apr 15
Serpent Lake in Crow Wing County, Minnesota usually freezes over around Dec 4, and usually has ice-out around Apr 15, based on Minnesota DNR ice observations recorded between 2018-2024. That works out to roughly 233 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 Serpent Lake
| Typical freeze-up (ice-in) | Dec 4 |
| Typical ice-out | Apr 15 |
| Earliest freeze-up on record | Nov 20, 2018 |
| Latest freeze-up on record | Jan 5, 2024 |
| Earliest ice-out on record | Mar 15, 2024 |
| Latest ice-out on record | May 5, 2022 |
| Open-water season | ~233 days |
| Winters observed | 19 |
| Location | Crow Wing County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Serpent 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 Serpent Lake has landed as early as Mar 15, 2024 and as late as May 5, 2022 — a spread of weeks around the Apr 15 median. Freeze-up has ranged from Nov 20, 2018 to Jan 5, 2024. 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. Serpent Lake carries an overall water-quality grade of A — the full breakdown is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2018-2024.