Seoul in August
In August, Seoul averages 30°C (86°F) during the day and 22°C (72°F) at night, with frequent rain — about 14 days of the month see precipitation (365 mm total).
High seasonConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
August offers comfortable temperatures in Seoul, with some rain to plan around.
How August compares to the rest of the year in Seoul
August is one of the warmest months in Seoul (1st of 12) and one of the wettest months (2nd of 12). Daytime temperature runs 13°C above the annual average (17°C). August runs 1°C warmer than July (29°C) and cools 4°C in September (26°C).
August sunrise & sunset in Seoul
Times shown for Seoul local time (Asia/Seoul), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Seoul — August
Golden-hour and blue-hour windows for the 15th of August, in Seoul's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Seoul in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (High season) and Seoul's popularity.
Crowds & pricing — August in Seoul
This is a busy month in Seoul — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: Northern Hemisphere summer holidays
Sun & mosquito risk — August in Seoul
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Seoul in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 2°C / 36°F | -6°C / 21°F | 20 mm | 7 | 3 |
| February | 4°C / 39°F | -3°C / 27°F | 25 mm | 7 | 2 |
| March | 10°C / 50°F | 1°C / 34°F | 45 mm | 8 | — |
| April | 17°C / 63°F | 7°C / 45°F | 75 mm | 9 | — |
| May | 23°C / 73°F | 13°C / 55°F | 105 mm | 10 | — |
| June | 27°C / 81°F | 18°C / 64°F | 130 mm | 11 | — |
| July | 29°C / 84°F | 22°C / 72°F | 395 mm | 16 | — |
| August | 30°C / 86°F | 22°C / 72°F | 365 mm | 14 | — |
| September | 26°C / 79°F | 17°C / 63°F | 170 mm | 9 | — |
| October | 19°C / 66°F | 10°C / 50°F | 55 mm | 6 | — |
| November | 11°C / 52°F | 3°C / 37°F | 55 mm | 8 | 1 |
| December | 4°C / 39°F | -3°C / 27°F | 20 mm | 7 | 3 |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for Seoul in August →
Frequently asked questions
How hot is Seoul in August?
In August, Seoul averages a high of 30°C (86°F) and a low of 22°C (72°F) — generally hot.
Does it rain a lot in Seoul in August?
August can be fairly wet in Seoul, with about 14 rainy days on average.
Is August a good time to visit Seoul?
August is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Seoul in August?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full August packing list for Seoul for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.