What is the weather like in Busan in September?

Expect temperatures between 20°C and 26°C with 27% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Busan in September?

Busan in September scores 60/100 based on 30 years of climate data. Decent conditions for most activities.

Who should visit Busan in September?

September in Busan is ideal for: Beach lovers, Cultural tourists, Business travelers.

Busan Weather in September | 30-Year Forecast

Avg High

26°C

Hottest around day 1

Avg Low

20°C

Coolest around day 30

Rainy Days

19days

27% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Sea of Japan(동해)

27.1°C

Monthly Average

Water Feel

🌴Tropical

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

Sea of Japan

동해

Busan coastline

Essential Travel Info for Busan

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

KRW

₩ South Korean won

Language

Korean

Driving

Right side

Safety

High Safety

GPI: 1.779

Travel Intelligence

Exclusive flight analytics & health data for Busan

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

47/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Jan

Low

Apr

Monthly Traffic Distribution

167

Jan

166

Feb

161

Mar

125

Apr

127

May

137

Jun

140

Jul

139

Aug

141

Sep

142

Oct

166

Nov

158

Dec

Traffic Level

Low Season

Key Connections

Jeju City Jeju (CJU)

Osaka Kansai (KIX)

Seoul-si Gimpo (GMP)

Fukuoka (FUK)

Taipei Taiwan Taoyuan (TPE)

Health & Safety Advisory

CDC travel health recommendations

10 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to South Korea.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to South Korea. Unvaccinated travelers 60 years and older may get vaccinated before traveling to South Korea.

Japanese Encephalitis

Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.

Malaria

CDC recommends that travelers going to certain areas of South Korea take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasLimited to the months of March–December in rural areas in the northern parts of the provinces of Incheon (also spelled Inch’ŏn), Gangwon (also spelled Kangwŏn), and Gyeonggi (also spelled Kyŏnggi), including the demilitarized zone (DMZ)Drug resistanceNoneSpeciesP. vivax(100%)Recommended chemoprophylaxisAtovaquone-proguanil, chloroquine, doxycycline, mefloquine, primaquine5, or tafenoquine2Updated April 23, 2025See footnotes

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

+4 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Busan?

👌Decent conditions for most activities(60/100)

Short Answer

Storm season alert for Busan in September: beyond the 26°C, 27% rain averages, hurricane risk requires travel insurance and schedule flexibility.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

Vaccinations required

Yellow Fever

Warm tropical seas

27.1°C sea temperature - Tropical Bath

Ideal temperature range

25.6°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Avian/Bird Flu, Hantavirus

Plenty of sunshine

8.1h of sunshine daily

Good For

🏖️
Beach lovers
27.1°C warm seas and 27% rain probability
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

👴
Elderly travelers
79% humidity creates difficult conditions
💼
Business travelers
Storm season may cause flight disruptions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Busan in September averages 26°C with 27% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Busan in September

What are the temperatures in Busan in September?

Daytime highs average 26°C, nights drop to 20°C. Temperatures remain fairly consistent.

How many rainy days in Busan in September?

Expect around 19 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Busan in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Busan?

This is shoulder season—moderate prices and manageable crowds.

Busan Weather in September