Seoul Marathon

Seoul, South Korea · March 21, 2027
partly-cloudy-day40°·53° high·Light·Dry
10
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Race Day Weather

partly-cloudy-day
40°at start
56° high
Breezy
Dry

Cold start — layer up, big temp swing

Runners will start in chilly 40°F conditions — dress in layers for the corral and plan to shed early. Temps will climb significantly to 56°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 172 days
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Distance: 26.2mi
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Race Plan

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Weather-adjusted pacing, per-mile terrain splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.

Race Conditions
Terrain Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Seoul Marathon, organized by The Dong-A Ilbo newspaper and commonly known as the Dong-A Marathon, first ran in 1931 as the Youngdungpo Marathon and is one of the oldest continuously run marathons in the world. It carries World Athletics Platinum Label status, the only race in Korea to hold that designation, and is recognized as Asia's first World Athletics Heritage event. The race starts at Gwanghwamun Plaza in central Seoul and finishes at Jamsil Sports Complex, drawing roughly 35,000 to 40,000 runners across the full marathon and 10km distances each March. Ten of South Korea's 28 national marathon records have been set at this race.

FAQ

When is the 2027 Seoul Marathon?

The 2027 Seoul Marathon will be held on Sunday March 21, 2027.

Is the Seoul Marathon a Boston Marathon Qualifier?

Yes, the Seoul Marathon is an official Boston Marathon qualifier.

What is the time limit for the Seoul Marathon?

The time limit for the Seoul Marathon is 5 hours.

What will the weather be like for the 2027 Seoul Marathon?

The forecast calls for a high of 56°F and a low of 36°F with a 6% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 5 years of data
Avg Temp
48°F
L:44° H:51°
RunScore
9
Conditions
Rain Freq
40%
2 of 5 yrs
Wind6mph
Dew36°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
43°/46°Light
10
2025
cloudy
40°/43°Light
10
2024
cloudy
48°/49°-
10
2023
clear-day
38°/54°-
10
2022
clear-day
49°/65°-
8