Race day on this page is Oct 18, 2026.
HalfForecasts live
Tokyo Legacy Half Marathon
Sunday, October 18, 2026Tokyo, Japan
Goal time
1:35:00
Adjusted time (preview)
About 107 m of climbing and 118 m of descent. Rolling.
Almost all within 2%1% over 6%Three climbsOne climb over 6%
Impacts
Based on the forecast, 3 days out.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Race Day Forecast
The live outlook for this start.
18°C
Feels like 18°C
Race start: 17°C → 20°C
Forecast: clear
Race Day Pacing
Personalized pacing with weather-adjusted strategy tailored to your fitness level.
Race Pass turns this into your personalised split plan, paced for this course and forecast
Live forecast, route, and elevation
Cloud Cover
11%
Wind
8.9km/h
Humidity
68%
WBGT
17.2°C
Race Day Pacing
Personalized pacing with weather-adjusted strategy tailored to your fitness level.
Race Pass turns this into your personalised split plan, paced for this course and forecast
Live forecast, route, and elevation
Race Timeline
Race starts 08:05
08:00
Starts 08:05
17°C
Feels 17°C
0.0 mm
0%
7.7 km/h
gust 11.8
09:00
12.2 km
19°C
Feels 19°C
0.0 mm
0%
8.4 km/h
gust 12.7
10:00
Finished
20°C
Feels 20°C
0.0 mm
0%
9.2 km/h
gust 14.7
Conditions over time
18 Oct 2026 · Scroll to see the full race · hover to explore
68% humidityDew 12.3°CWBGT 17.2°C0.0 mm (0%)
18°CFeels 18°C
08:05-09:40
TempDewWBGTRain
8.9 km/h
gust 13.1 km/h
WindGust
Historical weather
Mean of race-window hours across the last 10 years, ±5 days around 18 October. Sticky years still count. This is not a forecast.
17°C
13 - 22°C range
Partly cloudy on average
Historical: partly cloudy, with rain, with moderate winds
Historical average
10 years · ±5d around 18 October
2016-2025
Cloud Cover
45%
0 - 100% range
Wind
13km/h
3 - 19 km/h range • prevailing N
Humidity
77%
60 - 86% range
WBGT
15.3°C
13.7 - 15.4°C range
Race morning history
Last 10 years, around the 08:05 start hour. Typical mid-October air averages 17°C (about 12°C to 21°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
14-19°C
Almost all
13-21°C
Humidity
77%
Dew
13°C
WBGT
15°C
17°CAverage
08:05-09:40
Almost all (90%)Most mornings (70%)AverageRain
Blue is most mornings. Dashed lines are the rare tails. Pink is the average. The bands are historical race mornings, not a forecast range. Blue columns are rain on the right scale. This assumes a 1:35. You can set your own time in the app.
Typical race-morning wind
Where the wind usually came from on race morning, not where it was going.
N
Most frequent (50%)
Wind speed
0-6 km/h
6-13 km/h
13-21 km/h
21+ km/h
A start that feels cool is not a promise about the second half.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- Tokyo Marathon
- Kyoto Marathon
- Nagoya Women's Marathon
- Osaka Marathon
- Osaka Women's Marathon
- 51st Sapporo Marathon
- Marugame International Half Marathon
View race map for this area.
Make sense of the conditions
- Dew point, WBGT and running in the heat
Read the heat and humidity before deciding what pace makes sense.
- When drafting helps your running pace
A group can help, but its pace and the conditions still need to suit you.
- Pacing the climbs and descents
Use the course profile to think about effort, not just splits.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for Tokyo Legacy Half Marathon.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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