South Korea
Best Time to Visit Ulsan
Ulsan is a year-round destination, but the best time to visit depends on your preferences. Spring and autumn offer pleasant weather and manageable crowds, while summer is peak tourist season. Winter is the quietest time, but it can be chilly.
✦ Visit Ulsan in April or October for a comfortable and crowd-free experience.
✅ Best months
April and October are ideal, with mild temperatures (15-20°C/59-68°F) and fewer tourists compared to the peak summer months.
🔥 Peak season
July is the peak month, with the Boryeong Mud Festival attracting large crowds and driving up hotel prices. Expect higher prices and larger crowds during this time.
💷 Shoulder (best value)
May and September are good shoulder months, with discounts available at some hotels and a more relaxed atmosphere. The weather is still pleasant, with average highs around 20°C (68°F).
🌙 Quietest & cheapest
December is the quietest and cheapest time, but it can be very cold, with average lows around 0°C (32°F). You may find some attractions and businesses closed during this period.
Ulsan season by season
Spring (Mar–May)
Weather: Mild temperatures, blooming flowers, and sunshine
Crowds: Low
Good for hiking and outdoor activities
Summer (Jun–Aug)
Weather: Hot and humid, occasional typhoons
Crowds: High
Beach and water activities popular
Autumn (Sep–Nov)
Weather: Comfortable temperatures, foliage
Crowds: Medium
Festivals and outdoor events
Winter (Dec–Feb)
Weather: Cold, occasional snow
Crowds: Low
Cold but peaceful atmosphere
🎭 Events worth timing a trip around
The Boryeong Mud Festival (July) and the Ulsan Grand Festival (October) are notable events worth timing a trip around.
🧳 What to pack
Pack layers for Ulsan's climate, as temperatures can fluctuate significantly between morning and evening, especially during spring and autumn.
Found your dates? Get your hotel briefing.
Room tips, the 14-day forecast for your exact stay, dining, transport and more — free for any Ulsan hotel.
Researched & reviewed by the TripSage editorial team · Updated July 2026.