Weather in Ulsan - 14-day forecast

Detailed weather forecast for Ulsan, South Korea: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Ulsan

today☁️ 30°💧 0.5 mm

Thu🌤️ 31°💧 1.7 mm

Fri☁️ 31°💧 0.5 mm

Sat☁️ 31°💧 2.2 mm

Sun☁️ 34°💧 0.2 mm

Mon☀️ 34°💧 0.7 mm

Tue🌤️ 35°💧 0.5 mm

Wed🌧️ 32°💧 1.5 mm

14-day forecast - Ulsan

📅 Ulsan 30 & 45-day weather - long-range outlook

Next 16 days · forecast

30°

around 23° at night · days with rain: 6

Weeks 3-4 · avg for July

28°

around 23° at night · rain chance 48%

Weeks 5-7 · avg for August

29°

around 24° at night · rain chance 47%

The 30 & 45-day outlook for Ulsan: the next 16 days are a numerical forecast updated daily - on average 30° by day and 23° at night. Further out we rely on multi-year climate averages: around 28° in July, and about 29° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Ulsan

Wednesday8 July 2026

☁️30°overcast clouds

sunrise 05:14 · sunset 19:41 · night 24° · evening 28° · rain 0.54 mm · humidity 60% · wind 8 m/s · clouds 91%

Thursday9 July 2026

🌤️31°a few clouds

sunrise 05:15 · sunset 19:41 · night 22° · evening 28° · rain 1.68 mm · humidity 55% · wind 6 m/s · clouds 16%

Friday10 July 2026

☁️31°overcast clouds

sunrise 05:15 · sunset 19:41 · night 24° · evening 30° · rain 0.45 mm · humidity 54% · wind 3 m/s · clouds 100%

Saturday11 July 2026

☁️31°broken clouds

sunrise 05:16 · sunset 19:40 · night 23° · evening 28° · rain 2.18 mm · humidity 57% · wind 4 m/s · clouds 70%

Sunday12 July 2026

☁️34°overcast clouds

sunrise 05:16 · sunset 19:40 · night 26° · evening 31° · rain 0.24 mm · humidity 45% · wind 4 m/s · clouds 100%

Monday13 July 2026

☀️34°clear sky

sunrise 05:17 · sunset 19:40 · night 26° · evening 31° · rain 0.72 mm · humidity 46% · wind 5 m/s · clouds 57%

Tuesday14 July 2026

🌤️35°scattered clouds

sunrise 05:17 · sunset 19:39 · night 27° · evening 29° · rain 0.45 mm · humidity 46% · wind 4 m/s · clouds 25%

Wednesday15 July 2026

🌧️32°light rain

sunrise 05:18 · sunset 19:39 · night 25° · evening 28° · rain 1.47 mm · humidity 53% · wind 4 m/s · clouds 37%

Thursday16 July 2026

🌧️29°light rain

sunrise 05:19 · sunset 19:38 · night 24° · evening 28° · rain 0.39 mm · humidity 67% · wind 3 m/s · clouds 100%

Friday17 July 2026

☁️31°broken clouds

sunrise 05:19 · sunset 19:38 · night 23° · evening 27° · rain 2.19 mm · humidity 53% · wind 4 m/s · clouds 61%

Saturday18 July 2026

☁️29°overcast clouds

sunrise 05:20 · sunset 19:37 · night 22° · evening 26° · rain 0.18 mm · humidity 60% · wind 5 m/s · clouds 89%

Sunday19 July 2026

☁️29°overcast clouds

sunrise 05:21 · sunset 19:37 · night 22° · evening 25° · rain 36.45 mm · humidity 57% · wind 6 m/s · clouds 100%

Monday20 July 2026

🌧️27°light rain

sunrise 05:21 · sunset 19:36 · night 22° · evening 24° · rain 0.12 mm · humidity 61% · wind 7 m/s · clouds 88%

Tuesday21 July 2026

🌧️24°light rain

sunrise 05:22 · sunset 19:36 · night 21° · evening 23° · rain 2.46 mm · humidity 80% · wind 4 m/s · clouds 100%

Wednesday22 July 2026

🌧️26°light rain

sunrise 05:23 · sunset 19:35 · night 19° · evening 24° · rain 0.27 mm · humidity 57% · wind 5 m/s · clouds 77%

Thursday23 July 2026

🌧️27°light rain

sunrise 05:24 · sunset 19:34 · night 20° · evening 23° · rain 0.18 mm · humidity 57% · wind 7 m/s · clouds 100%

☀️ UV index in Ulsan - is it safe to sunbathe?

Today the UV index in Ulsan 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 - Ulsan

Water today

18°C

Week avg

20°C

Waves today

0.8 m

How's the water?

cold

16-day sea temperature forecast:

8.07 18°C9.07 18°C10.07 22°C11.07 22°C12.07 22°C13.07 21°C14.07 21°C15.07 15°C16.07 15°C

Average sea temperature through the year:

Jan 13°CFeb 12°CMar 13°CApr 14°CMay 16°CJun 19°CJul 21°CAug 27°CSep 27°COct 22°CNov 18°CDec 14°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Ulsan

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Taejŏn	6.2	8.2	very good
Pohang	6.1	8.1	very good
Taegu	6	8.1	very good
Cheongju-si	5.5	6.7	very good
Seul	5	5.5	very good
Inch'ŏn	5	5.5	very good
Ansan-si	3.8	4.4	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 10:00).

Ulsan weather through the year

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

🎉 Public holidays in Ulsan - when are the long weekends?

Next long weekend in Ulsan: Constitution Day (17 July, Friday) - Friday–Sunday (3 days off).

17 JulyFriday

Constitution Day

🎈 long weekend

17 AugustMonday

Liberation Day

🎈 long weekend

24 SeptemberThursday

Chuseok

🎈 long weekend + bridge day

25 SeptemberFriday

Chuseok

🎈 long weekend

26 SeptemberSaturday

Chuseok

falls on a weekend

5 OctoberMonday

National Foundation Day

🎈 long weekend

9 OctoberFriday

Hangul Day

🎈 long weekend

25 DecemberFriday

Christmas Day

🎈 long weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

6 FebruarySaturday 2027

Lunar New Year

falls on a weekend

8 FebruaryMonday 2027

Lunar New Year

🎈 long weekend

9 FebruaryTuesday 2027

Lunar New Year

🎈 long weekend + bridge day

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

BusanPohangChangwonDaegu

FAQ - Ulsan weather

What is the weather like in Ulsan today?

Today it is about 30° during the day and 24° at night, overcast clouds.

How far ahead can I check the forecast for Ulsan?

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.