Toronto Waterfront Marathon weather
What will race morning in Toronto cost you?
Toronto Waterfront Marathon mornings around race day since 2021, by weather-model estimate: about 9°C (47°F) at 08:00 near Toronto. Most were 4 to 14°C.
- Date
- Sun, 18 Oct 2026
- First start
- 08:00 local
- Distance
- 42.2 km
| Year | Air | Dew pt | Wind | Rain hrs |
|---|---|---|---|---|
| 2025 | 10°C | 7°C | 14 km/h | 0% |
| 2024 | 7°C | 4°C | 12 km/h | 0% |
| 2023 | 8°C | 6°C | 14 km/h | 18% |
| 2022 | 8°C | 5°C | 12 km/h | 27% |
| 2021 | 11°C | 9°C | 11 km/h | 27% |
By weather-model estimate near the race, mornings around race day. Not station readings.
The 2026 marathon starts on Yonge Street near Elm Street and finishes on Bay Street north of Queen Street. The map is the 2024 course and does not show the new start. Organiser route
Past starts: 9°C typical, 4 to 14°C since 2021.
01 · The conditions
Race-day weather
The past weather below is context for the next edition. We do not substitute today’s weather for a past race.
Explore historical weather- ★★★★★5.080+ ratings
- 3,100+runners
- 100countries
Example race: a hot half marathon in Florida
On a computer? Scan with your phone camera to get the app.
Works with Apple HealthGet Toronto race-morning weather on your phone.
The app turns race-morning weather into your race plan: your goal pace, your race-day pace, and how to spend it from the start to the finish.
On a computer? Scan with your phone camera to get the app.
Example race: a hot half marathon in Florida
02 · Same effort, different day
What the weather may cost your goal
4:00:00 goal. On a typical race morning here, expect about 4:00 to 4:03. Main factor: heat.
- Heat and sun0%
- Wind and comfort0%
- Weather total0%
RunWeather’s pace model at your goal effort, over every hour you are on course (08:00 to 12:00 local), weighted by the time you spend in each, using the five-year race-morning average. A planning preview, not a predicted finish. Hills, turns, shelter, fuelling and heat adaptation are not modelled here; rain is left out because a probability is not a measured rain rate. Explore the heat pace calculator.
View even-pace checkpoints
| Distance | Elapsed time |
|---|---|
| 5.0 km | 0:28:26 |
| 10.0 km | 0:56:53 |
| 15.0 km | 1:25:19 |
| 20.0 km | 1:53:45 |
| 25.0 km | 2:22:12 |
| 30.0 km | 2:50:38 |
| 35.0 km | 3:19:05 |
| 40.0 km | 3:47:31 |
| 42.2 km · Finish | 4:00:00 |
In the app
Your race plan, on race morning
Add the Toronto Waterfront Marathon and the app keeps your plan current until the gun.
Goal pace against race-day pace
What your goal is worth on this morning’s weather, per km and at the finish.
How to spend it
Start, middle and finish, against your average.
What slows you
Heat, wind and hills, each in minutes.
Goal vs race day
What slows you
Example race: a hot half marathon in Florida
Reference
Everything else about race morning
Open any row for the full detail.
Race day recap18 October 2026
Toronto Waterfront Marathon ran on 18 October 2026. The weather recap for this edition is not published yet.
The course42.2 km · 77 to 114 m
The 2026 marathon starts on Yonge Street near Elm Street and finishes on Bay Street north of Queen Street. The map is the 2024 course and does not show the new start.
THE COURSE42.2 km1×Zoom to drag the route. Keyboard: + / −, arrows, Home to reset.
2024 course. Check the organiser’s map for this year.
ELEVATION77–114 m0.0 km- Elevation
- 96 m
Hover or drag to explore. Use ← → when focused.
The 2024 course from RunWeather's race catalogue. The next edition may differ; elevation is approximate. Elevation along that course, not confirmed for this year. Official race site ↗01The first marathon start is 08:00, with later corral starts; use the time on your own instructions.
02Check the current map because the organiser has changed the start location for 2026.
03Look at conditions across your full race window before deciding on an opening pace.
Race-window historyLast 5 years, race date ±5 days
A range for planning Toronto Waterfront Marathon: weather near Toronto on race morning, the last 5 years (2021 to 2025, race date ±5 days). Not a forecast.
Typical start-hour air9°C10th–90th percentile 4°C–14°CDew point / humidity6°C85% relative humidityStart-hour wind13 km/hDirection varies by dayHours with rain15%Historical frequency at this hourAIR THROUGH THE RUN9°C → 14°C by +4hThe five-year picture
08:00- Air temperature
- 9°C
- Humidity
- 85%
- Wind
- 13 km/h
- Hours with rain
- 15%
Hover or drag to explore. Use ← → when focused. Shading: middle 80% of sampled temperatures.
Five-year average Middle 80% of sampled hoursThe sampled air warms by about 5°C across four hours. Check your expected finish-hour forecast, not just the start.
WIND CONTEXTWhere the breeze came from
WIND FROMNW15 of 55 samples · 27%
Mean 12 km/hThe petals show how often the wind came from each direction at the sampled start hour. They do not predict the direction on race day.
A city-point wind rose cannot tell you which parts of the course will be sheltered or exposed. Use the live forecast and the organiser’s route map together.
Method: 55 ERA5 hourly samples at 08:00 local time, across 11 calendar days per year in 2021–2025. The sample uses the hour containing the advertised first start; waves may start later. Grid weather is modelled reanalysis, not an on-course station reading. Open-Meteo Historical Weather API . Data generated 2026-09-29.
October climateAll-hours monthly averages
October averages in Toronto, from 2022 to 2024. These are monthly conditions, not a race-day forecast.
- mean temperature
- 12°C
- mean humidity
- 73%
- mean wind
- 14 km/h
- hours with rain
- 12%
Monthly, all-hours averages for Toronto, 2022–2024. Not past race-day measurements or a forecast. Rain is the share of historical hours with precipitation, not the chance of rain on race day. Source: Open-Meteo ERA5.
Explore running weather in TorontoToronto Waterfront Marathon FAQs7 questions
When is the 2026 Toronto Waterfront Marathon?
Toronto Waterfront Marathon is scheduled for 18 October 2026. Confirm the latest details on the official event website before travelling.
Is the weather shown a forecast for the Toronto Waterfront Marathon?
Only from about 14 days before the race, when the page shows the live race-day forecast. Before that, you see the weather near the city on the mornings around race day in the last 5 years: what is typical, not what will happen. Monthly averages, when shown, cover every hour of the race month.
What is race morning usually like at the Toronto Waterfront Marathon?
Around the 08:00 start, mornings around race day near Toronto in the last 5 years averaged 9°C (47°F), 85% humidity and 13 km/h wind. Most started between 4°C and 14°C. This is weather near the city, not a reading from the race itself or a forecast.
Which recent year had the warmest race morning at the Toronto Waterfront Marathon?
2021. Around race day that year it was about 11°C (52°F) around the 08:00 start, against 9°C (47°F) on an average year.
Which recent year had the windiest race morning at the Toronto Waterfront Marathon?
2023, with about 14 km/h of wind around the 08:00 start. Over the last 5 years the wind here came mostly from the north-west.
How should I pace the Toronto Waterfront Marathon on a warm day?
Take a 4:00:00 goal. Past race mornings here were cool. Expect no weather penalty at your goal. If race day comes in warmer, start a little easier than goal pace, run by feel to halfway and drink early. Plan my race gives your splits for the day.
Can past years predict the weather on race day at the Toronto Waterfront Marathon?
No. They show what race morning is usually like, not what this year will bring. Check the live forecast in the last 14 days, look at the hours through your expected finish, and follow the organiser for start and course updates.
Sources and race informationOrganiser, weather data, guide reviewed 2026-09-22
Past race-morning weather: Open-Meteo Historical Weather API, weather near the city from 2021 to 2025, updated 2026-09-29. Not official race-day readings.
Guide reviewed . RunWeather is an independent guide, not the race organiser. Dates, waves and routes can change; the organiser’s latest instructions take priority. Course map: The 2024 course from RunWeather's race catalogue. The next edition may differ; elevation is approximate.
Toronto race morning, on your phone.
Free on iPhone and Android. Your race plan, updated with the forecast until the gun.
On a computer? Scan with your phone camera to get the app.
Example race: a hot half marathon in Florida