Do I need a jacket in Seoul in August?

Probably not for daytime — highs average around 88°F. A light layer for air-conditioned interiors is enough.

Is August rainy in Seoul?

Expect roughly 15 days of rain across the month. Pack a compact umbrella and shoes that can handle wet pavement.

How hot does Seoul get in August?

Daytime highs average around 88°F. Lean toward breathable fabrics like cotton and linen, and bring sun protection.

What to Pack for Seoul in August — 2026 Packing List

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Essentials

If you only pack a few things, pack these.

Lightweight moisture-wicking shirts (5+)Essential
Seoul's August highs of 88°F combined with lingering monsoon humidity make moisture-wicking fabrics essential — cotton stays wet and heavy after the Han River park's sweaty midday walks.
Shorts and lightweight trousersEssential
The 88°F August heat on Seoul's exposed palace grounds and Han River waterfront makes heavy legwear genuinely uncomfortable — lightweight cotton or quick-dry shorts handle the full month effectively.
Thin cardigan or light layer (for AC)Essential
Seoul's aggressive indoor air conditioning remains at 65–68°F even in August's hottest weeks — a thin cardigan in the bag is essential for comfort on long subway rides and in air-conditioned restaurants.
Packable waterproof jacket (early August)Essential
The first 2 weeks of August see 10–12 of the month's 15 rain days as the Jangma tail continues — a packable waterproof jacket with hood remains essential until around August 15.
Breathable lightweight sneakersEssential
Late August's dry heat at Seoul's palace grounds and Myeongdong streets calls for breathable, minimal sneakers — post-monsoon conditions allow stylish footwear choices that July's flooding made impractical.
High-SPF sunscreen (SPF 50+)Essential
Seoul's late August UV index peaks at extreme levels — the open Han River banks, Bukhansan granite ridgelines, and Gyeongbokgung's unshaded stone courtyards all reflect UV intensely during post-monsoon clear skies.
UV-blocking sunglassesEssential
Post-monsoon late August sun in Seoul is intense and direct — UV-blocking sunglasses are essential for the long outdoor walks through Insadong and along the Han River that characterize the season's best days.

Clothing

Lightweight moisture-wicking shirts (5+)Essential
Seoul's August highs of 88°F combined with lingering monsoon humidity make moisture-wicking fabrics essential — cotton stays wet and heavy after the Han River park's sweaty midday walks.
Shorts and lightweight trousersEssential
The 88°F August heat on Seoul's exposed palace grounds and Han River waterfront makes heavy legwear genuinely uncomfortable — lightweight cotton or quick-dry shorts handle the full month effectively.
Thin cardigan or light layer (for AC)Essential
Seoul's aggressive indoor air conditioning remains at 65–68°F even in August's hottest weeks — a thin cardigan in the bag is essential for comfort on long subway rides and in air-conditioned restaurants.
Packable waterproof jacket (early August)Essential
The first 2 weeks of August see 10–12 of the month's 15 rain days as the Jangma tail continues — a packable waterproof jacket with hood remains essential until around August 15.

Footwear

Breathable lightweight sneakersEssential
Late August's dry heat at Seoul's palace grounds and Myeongdong streets calls for breathable, minimal sneakers — post-monsoon conditions allow stylish footwear choices that July's flooding made impractical.
Waterproof sandals (early August)Recommended
Early August monsoon tail at Seoul's Han River parks still warrants waterproof sandals — the residual flooding on riverside paths makes enclosed footwear get soaked quickly.
Quick-dry socks (multiple pairs)Recommended
Seoul's 15 August rain days — concentrated in the first half of the month — make quick-dry socks essential for keeping feet comfortable through multiple daily footwear-soaking encounters near the Han River.

Accessories

High-SPF sunscreen (SPF 50+)Essential
Seoul's late August UV index peaks at extreme levels — the open Han River banks, Bukhansan granite ridgelines, and Gyeongbokgung's unshaded stone courtyards all reflect UV intensely during post-monsoon clear skies.
UV-blocking sunglassesEssential
Post-monsoon late August sun in Seoul is intense and direct — UV-blocking sunglasses are essential for the long outdoor walks through Insadong and along the Han River that characterize the season's best days.
Compact umbrella (early August)Recommended
The approximately 15 August rain days in Seoul are front-loaded into the first half of the month — keep a compact umbrella available until mid-August for sudden Jangma tail showers.

Local tips for Seoul in August

Seoul's post-Jangma window (typically mid-to-late August) brings some of the clearest skies of the year — Bukhansan summit views are exceptional on these clear days, with the entire Seoul basin visible from the granite peaks.

Gwangjang Market's outdoor fabric stalls sell light summer Korean streetwear at excellent prices in August — the covered portions of the market stay busy and provide shade during the midday heat peak.

Seoul's Han River outdoor cinema and music events resume in late August when monsoon ends — check Seoul's official tourism calendar for evening events along the Banpo and Yeouido riverbanks.

Want the full picture? 12 outfit lookbooks for Seoul in Summer, plus restaurant + day-trip dress codes →

FAQ — Seoul in August

Probably not for daytime — highs average around 88°F. A light layer for air-conditioned interiors is enough.
Expect roughly 15 days of rain across the month. Pack a compact umbrella and shoes that can handle wet pavement.
Daytime highs average around 88°F. Lean toward breathable fabrics like cotton and linen, and bring sun protection.
Gwangjang Market's outdoor fabric stalls sell light summer Korean streetwear at excellent prices in August — the covered portions of the market stay busy and provide shade during the midday heat peak.

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August Packing List for Seoul — What to Wear & Bring