Generated Sep 1 2026 · Model run 12:30 ET · info@ontariofall.com
Ontario Parks reports where the colour was, roughly once a week. This site forecasts where it is going to be, every morning, with a dated peak window for each location and a confidence band we publish. It is run by Wilderness Union, a Toronto outdoor community whose guides are in these parks most weeks of the season, and the forecast is corrected daily by what they and our readers report from the ground. Everything on this page is generated from the live model, free to quote with credit to ontariofall.com and a link. If you need something that is not here, email us for a fast response.
Quotable
"The best fall colour in Ontario this weekend is at Lake Superior, scoring 3.3 out of 10, with peak colour running Sep 21 to Sep 29, give or take 6.6 days." · ontariofall.com forecast, Sep 1
"Colour moves north to south across roughly a month. The earliest predicted peak this year is Sleeping Giant, Thunder Bay, Sep 19 to Sep 27; the latest is Sandbanks and Prince Edward County, Oct 16 to Oct 24." · ontariofall.com forecast, Sep 1
"Every peak window ontariofall.com publishes is frozen each Monday into a log that cannot be edited afterwards, then scored against what actually happened once the season ends." · ontariofall.com, Sep 1
"The model is corrected every day by people who are actually there: the Wilderness Union community, who are on the ground, and readers who file what they saw. Every report is read by a person before it can change a forecast." · ontariofall.com, Sep 1
Attribution required: ontariofall.com, with a link to the region page quoted. We do not claim to be the most accurate tracker. We publish our scorecard instead: how accurate were we?
Last updated Tue, September 1, 2026.
Machine readable
On request, same day
Reuse terms
Charts and data: CC BY 4.0. Camera frames: not ours to license, go to the named source on each location page. Reader photos: reproduce only with our written OK. Underlying sources carry their own terms and we pass them through rather than absorb them: the Ontario Parks fall colour report, Ontario 511 open data, per-camera licensing from each operator, and weather from Weather data by Open-Meteo.com under CC BY 4.0.
ontariofall.com is built and run by Wilderness Union Inc., a Toronto outdoor community that leads over a hundred guided trips a year into Ontario’s wild places, from the Don Valley to Temagami.
Wilderness Union runs fall trips to some of the locations on this map and they are marked as such.
Every ground report, whether it comes from a guide or from a reader, is reviewed by a person before it appears and is dated and credited on the location page it affects. The full methodology documents every source and what the model gets wrong.
The live map, for the whole province or framed on one location. It updates itself, so a post written in September still shows the right colour in October. Free to use, including commercially, with the credit line left in place.
Every location carries a predicted peak date with a confidence band, recalculated daily from cold night accumulation, September warmth, summer drought and frost events. The model is rules based and explainable, so any change comes with a plain-language reason.
Where a camera licence allows it, one frame a day is saved and reduced to a green chromatic coordinate over a fixed crop. That gives an objective daily colour curve per location that nobody else in Ontario publishes.
Every Monday in season, that day’s predicted peak windows are frozen into a log that cannot be edited afterwards. After the season, the scorecard compares those frozen calls against what happened, broken down by how far ahead each call was made. Hit or miss, it goes up.
Anything measured is labelled with its source and date. Anything modelled is labelled predicted. That distinction is visible on every screen on the site.
The forecast is actively moved by reports from the ground. Wilderness Union runs trips through the fall, most weeks of the season, in many of the places on this map, so a location here can move days before a weekly park report catches up. Readers file too and a person reads every report before it appears.
26 locations · 14 camera views
Each has its own page with a peak window, its sources and their dates.