Tomorrow morning · 6–9 am
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Run Conditions · Seoul · Updated live
Is it a good day to run?
Live weather, air quality and a runner-scored 7-day outlook for eight popular Seoul running zones. One number, plain English, updated every ten minutes.
Seoul · Han River · Yeouido
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Reading conditions…
Pulling the latest weather and air-quality data.
Dust event is hitting — other Seoul zones right now. This zone is reading clean.
Updated — · How is this scored?
Right now · best of the eight zones
Races within 7 days · forecasts
Race-day weather
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2026-05-25
Burning RUN 2026
Seoul
Forecast for Namsan · ~2 km away
Loading race-day reading…
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2026-05-30
Gangnam Half Race
Seoul
Forecast for Namsan · ~2 km away
Loading race-day reading…
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2026-05-30
Hanbat Heritage Walk/Run
Daejeon
Forecast for Olympic Park · ~133 km away
Loading race-day reading…
All zones · live
Every running spot in Seoul, scored right now
One pin per zone, sized and coloured by the current run score. The persimmon ribbon traces the Han River. Tap any label to load that zone into the dashboard below.
Real Korean station readings for current air. Tap any zone label to switch the dashboard.
Right now
What it feels like out there
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- Temperature
- —°C
- Feels like
- —°C
- Humidity
- —%
- Wind
- —km/h
- Rain chance · 6h
- —%
- Air quality
- —μg/m³
- UV index
- —
- Sunrise / Sunset
- — · —
PM10 — · O₃ —
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- Reading conditions…
Zone details
Each zone, scored and described
The same eight zones from the map above, with the surface, terrain and start hint for each. Click any zone to load it into the dashboard.
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Han River · Yeouido 한강 · 여의도
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Wide riverside paths, kilometre markers, easy 5K → 21K loops past the National Assembly.
- Start
- Yeouinaru Station Exit 2
- Surface
- riverside path
- Terrain
- flat
- Score
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Han River · Banpo 한강 · 반포
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Rainbow Bridge fountain stretch on the south bank, the postcard half-marathon route.
- Start
- Express Bus Terminal Exit 8-1
- Surface
- riverside path
- Terrain
- flat
- Score
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Han River · Ttukseom 한강 · 뚝섬
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East-side riverside with cleaner air than central zones and direct Seoul Forest access.
- Start
- Ttukseom Resort Station Exit 2
- Surface
- riverside path
- Terrain
- flat
- Score
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Namsan 남산
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Forested 7K loop around the mountain, one steady climb, shaded in summer, lit at night.
- Start
- Hoehyeon Station Exit 4 → Sungnyemun side
- Surface
- mixed urban
- Terrain
- hilly
- Score
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Bukhansan 북한산
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Granite trail running on the northern edge of the city: Baegundae, Dobongsan, Uiryeong-gil.
- Start
- Bukhansan trailhead at Bulgwang or Dobongsan
- Surface
- mountain trail
- Terrain
- hilly
- Score
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World Cup Park 월드컵공원
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Haneul Park climb, Pyeonghwa Park loops, World Cup Stadium perimeter; west-side calm.
- Start
- World Cup Stadium Station Exit 1
- Surface
- park loop
- Terrain
- rolling
- Score
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Seoul Forest 서울숲
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Tree-lined paths, deer enclosure, easy access to the Jungnangcheon stream extensions.
- Start
- Seoul Forest Station Exit 3
- Surface
- park loop
- Terrain
- flat
- Score
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Olympic Park 올림픽공원
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Southeast loop park, soft surfaces, the lone-tree photo, popular with Songpa runners.
- Start
- Olympic Park Station Exit 3
- Surface
- park loop
- Terrain
- rolling
- Score
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Today · hour by hour
When today is actually runnable
Each block is one hour. Green is a window worth lacing up for. Best hour, if any, is flagged.
Reading the hour-by-hour outlook…
All zones · next 12 hours
The whole city, hour by hour
One row per zone, one column per upcoming hour. Pick a green cell: that’s your run. Sunrise and sunset markers show when daylight breaks and ends, so night-time cells flag themselves automatically.
Reading the 12-hour grid…
- Perfect (88+)
- Great (78+)
- Good (65+)
- Workable (50+)
- Tough (35+)
- Skip
Run-window finder
Find the best window inside the time you actually have
Tell me when you’re free and how long you want to run. I’ll pick the best block from now through the next 48 hours across all eight zones, so you can match your schedule to the city.
Week ahead
The best day of the next seven
Plan your long run, your tempo, or your rest day. Scores are the average of each day’s daylight hours.
- Reading the 7-day forecast…
What to wear
Dress for today, not for last week
- Loading recommendations…
These are general Seoul-runner recommendations based on the current feels-like temperature, wind, rain, UV and air quality. If you run hot or cold, adjust one layer in your favour.
About this page
How the running score is built
The score is a 0–100 composite built from five numbers that actually matter to a runner: feels-like temperature, rain, PM2.5 air quality, wind, and a humidity penalty when it’s warm. Each subscore is weighted: temperature 32%, rain 27%, air 22%, wind 13%, humidity 6%.
Three things will cap the score regardless of how good the other inputs read, because they reflect a physiological reality the runner can’t muscle through:
- Air quality PM2.5 above 35 μg/m³ caps the score at 78. Above 50 caps at 60. Above 75 forces a Skip.
- Wind Sustained wind above 20 km/h caps at 78. Above 28 km/h caps at 55. Above 38 km/h forces a Skip, because Han River paths and bridge decks get unsafe.
- Asian dust (황사) Coarse-particle event in progress caps at 45 even when PM2.5 alone reads moderate. KF94 mask required.
Weather forecast data comes from Open-Meteo (ECMWF + DWD ensemble). Current air-quality readings come from AQICN’s aggregation of real AirKorea (한국환경공단) station readings, so the PM2.5 number for each zone is from an actual Korean ground station near that zone, not a model grid cell. Hourly air-quality forecast falls back to Open-Meteo / CAMS because AQICN doesn’t expose hourly forecasts.
The page caches each upstream fetch for ten minutes at the Cloudflare edge, so reloads aren’t hammering the APIs.
Score ladder: 88+ as good as Seoul gets. 78–87 is a strong run window. 65–77 is solidly workable. 50–64 is manageable but compromised, keep it easy. Below 50, indoors is usually the smart call.
The scoring rules are tuned for an average-fit adult running 5–15 km in Seoul. They aren’t medical advice. If you have a respiratory condition, are pregnant, or run with kids, default stricter on the air-quality side.
Quick answers
Common questions
Is it a good day to run in Seoul today?
Check the hero score at the top. 78+ is a strong window. The hourly strip below tells you which hours are best within today, and the weekly view tells you whether tomorrow is going to be better than now.
What is a safe PM2.5 level for running?
PM2.5 below 15 μg/m³ is clean air. 15–35 is fair. 35–50 starts to compromise harder efforts. Above 50 sensitive runners should move indoors. Above 75 is very bad. Skip the outdoor run.
Which zone has the cleanest air?
Bukhansan and the east-side river zones (Ttukseom, Seoul Forest, Olympic Park) usually read lower PM2.5 than central or western Seoul because they sit upwind of most of the city in the prevailing westerly wind. The live numbers on the map are the source of truth.
What is the best time of day to run in Seoul?
In spring and autumn, early morning (5:30–7:30) and late afternoon (17:00–19:30) are usually best. Summer, run before sunrise or after sunset. Winter, mid-morning to early afternoon (10:00–14:00) is warmest. The hourly strip on this page surfaces today’s actual best window.
Want a local to run it with you?
I’ve run Seoul most mornings for ten years. Private and small-group guided runs from any of the zones above, at your pace, with the coffee stop already picked out.