worldweather

Weather in Seoul - 14-day forecast

Detailed weather forecast for Seoul, South Korea: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Seoul
today🌤️ 26°💧 10.1 mm
Sun☁️ 27°💧 2.2 mm
Mon☀️ 27°💧 6 mm
Tue🌤️ 27°💧 3.6 mm
Wed🌧️ 20°💧 1.3 mm
Thu🌤️ 24°💧 0.6 mm
Fri☁️ 25°💧 20.5 mm
Sat☀️ 28°💧 3.3 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Wednesday 9 Sept in Seoul, the forecast high is 20°C. Typical daytime temperatures at this time of year range from 24°C to 27°C, so it will be exceptionally cool. It is cooler than 98% of similar days.

26°Cnear normal
usually 24°C–27°C
night: exceptionally warm rain: more rain than usual wind: typical
27°Cwarmer than usual
usually 24°C–27°C
warmer than 78% of similar days
night: exceptionally warm rain: typical rainfall wind: typical
27°Cwarmer than usual
usually 24°C–27°C
warmer than 73% of similar days
night: exceptionally warm rain: more rain than usual wind: exceptionally light
27°Cwarmer than usual
usually 24°C–27°C
warmer than 85% of similar days
night: exceptionally warm rain: more rain than usual wind: typical
20°Cexceptionally cool
usually 24°C–27°C
cooler than 98% of similar days
night: warmer than usual rain: typical rainfall wind: typical
24°Ccooler than usual
usually 24°C–27°C
cooler than 75% of similar days
night: exceptionally warm rain: typical rainfall wind: lighter than usual
25°Cnear normal
usually 24°C–27°C
night: exceptionally warm rain: exceptionally wet wind: lighter than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
20°28°35° 1981: 24°C1982: 24°C1983: 24°C1984: 24°C1985: 26°C1986: 24°C1987: 24°C1988: 26°C1989: 26°C1990: 26°C1991: 26°C1992: 25°C1993: 25°C1994: 25°C1995: 23°C1996: 25°C1997: 27°C1998: 27°C1999: 27°C2000: 24°C2001: 26°C2002: 26°C2003: 24°C2004: 24°C2005: 26°C2006: 23°C2007: 24°C2008: 27°C2009: 26°C2010: 27°C2011: 24°C2012: 24°C2013: 24°C2014: 27°C2015: 26°C2016: 28°C2017: 25°C2018: 25°C2019: 27°C2020: 24°C2021: 26°C2022: 26°C2023: 29°C2024: 30°C2025: 28°C 2026 forecast: 25°C current forecast 25°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 25°C by day. The coolest year was 2006 (23°C) and the warmest was 2024 (30°C). The current forecast averages 25°C - close to the historical median.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Seoul

Seoul - 14-day weather forecast infographic

Seoul 30 & 45-day weather - long-range outlook

Next 16 days · forecast
26°
around 23° at night · days with rain: 12
Weeks 3-4 · avg for September
22°
around 21° at night · rain chance 75%
Weeks 5-7 · avg for October
20°
around 19° at night · rain chance 50%
The 30 & 45-day outlook for Seoul: the next 16 days are a numerical forecast updated daily - on average 26° by day and 23° at night. Further out we rely on multi-year climate averages: around 22° in September, and about 20° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Seoul

Saturday5 September 2026
🌤️26°a few clouds
sunrise 06:05 · sunset 18:56 · night 22° · evening 27° · rain 10.08 mm · humidity 51% · wind 5 m/s · clouds 13%
Sunday6 September 2026
☁️27°broken clouds
sunrise 06:06 · sunset 18:55 · night 22° · evening 27° · rain 2.22 mm · humidity 43% · wind 5 m/s · clouds 75%
Monday7 September 2026
☀️27°clear sky
sunrise 06:07 · sunset 18:53 · night 23° · evening 27° · rain 5.97 mm · humidity 39% · wind 2 m/s · clouds 6%
Tuesday8 September 2026
🌤️27°scattered clouds
sunrise 06:07 · sunset 18:52 · night 24° · evening 26° · rain 3.57 mm · humidity 38% · wind 4 m/s · clouds 36%
Wednesday9 September 2026
🌧️20°light rain
sunrise 06:08 · sunset 18:50 · night 19° · evening 21° · rain 1.33 mm · humidity 54% · wind 5 m/s · clouds 99%
Thursday10 September 2026
🌤️24°scattered clouds
sunrise 06:09 · sunset 18:49 · night 22° · evening 25° · rain 0.63 mm · humidity 39% · wind 3 m/s · clouds 42%
Friday11 September 2026
☁️25°broken clouds
sunrise 06:10 · sunset 18:47 · night 23° · evening 26° · rain 20.52 mm · humidity 38% · wind 4 m/s · clouds 72%
Saturday12 September 2026
☀️28°clear sky
sunrise 06:11 · sunset 18:46 · night 25° · evening 27° · rain 3.27 mm · humidity 30% · wind 2 m/s · clouds 100%
Sunday13 September 2026
☁️28°overcast clouds
sunrise 06:12 · sunset 18:44 · night 24° · evening 25° · rain 72.57 mm · humidity 38% · wind 3 m/s · clouds 100%
Monday14 September 2026
☁️25°overcast clouds
sunrise 06:12 · sunset 18:43 · night 22° · evening 24° · rain 104.97 mm · humidity 48% · wind 3 m/s · clouds 100%
Tuesday15 September 2026
☁️27°broken clouds
sunrise 06:13 · sunset 18:41 · night 24° · evening 27° · rain 0.96 mm · humidity 39% · wind 3 m/s · clouds 70%
Wednesday16 September 2026
☀️29°clear sky
sunrise 06:14 · sunset 18:40 · night 25° · evening 29° · rain 5.94 mm · humidity 41% · wind 3 m/s · clouds 82%
Thursday17 September 2026
☁️28°overcast clouds
sunrise 06:15 · sunset 18:38 · night 26° · evening 28° · rain 14.79 mm · humidity 45% · wind 2 m/s · clouds 100%
Friday18 September 2026
☁️29°broken clouds
sunrise 06:16 · sunset 18:37 · night 24° · evening 26° · rain 0.21 mm · humidity 42% · wind 5 m/s · clouds 51%
Saturday19 September 2026
☁️29°broken clouds
sunrise 06:17 · sunset 18:35 · night 25° · evening 27° · humidity 34% · wind 3 m/s · clouds 55%
Sunday20 September 2026
🌧️21°light rain
sunrise 06:17 · sunset 18:33 · night 21° · evening 21° · rain 1.59 mm · humidity 81% · wind 2 m/s · clouds 100%

UV index in Seoul - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTSeoul03681111+6.7UV HIGHtoday, daily maxSPF 30-50, a hat and sunglasses are a must. Betterstay in shade between 11:00 and 15:00.Unprotected fair skin may burn in about 30 min7Sat5.097Sun6.097Mon7.097Tue8.096Wed9.096Thu10.097Fri11.097Sat12.097Sun13.094Mon14.095Tue15.096Wed16.095Thu17.096Fri18.096Sat19.094Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Seoul is 7 (high) - unprotected fair skin can burn in about 30 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

Sea temperature - Seoul

Water today
27°C
Week avg
26°C
How's the water?
very warm
16-day sea temperature forecast:
5.09 27°C6.09 27°C7.09 27°C8.09 26°C9.09 26°C10.09 26°C11.09 25°C12.09 25°C13.09 25°C
Average sea temperature through the year:
Jan 4°CFeb 3°CMar 6°CApr 12°CMay 17°CJun 23°CJul 28°CAug 30°CSep 27°COct 22°CNov 16°CDec 8°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Seoul weather through the year

Seoul - annual climate

Warmest, driest months on average: April, May, June, July.

Upcoming public holidays in South Korea: Chuseok — 24 September · Chuseok — 25 September · Chuseok — 26 September.

Nearby and related places

AnyangIncheonUlsanSeogwipoPohangBusan

FAQ - Seoul weather

What is the weather like in Seoul today?
Today it is about 26° during the day and 22° at night, a few clouds.
How far ahead can I check the forecast for Seoul?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.