When to go · Donghae
Donghae in September
Great month. Inside Donghae's best window: May–Jun, Sep–Oct.
Key facts
- Verdict
- Great
- Temperature
- 25°C (77°F)77°F (25°C) / 16°C (61°F)61°F (16°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- South Korea overall
- Prices
- Medium
- South Korea overall
Verdict
Inside Donghae's best window: May–Jun, Sep–Oct.
Is another month better than September?
No other month rates higher than September for Donghae in this guide.
Weather in September
- DonghaeHighs around 25 °C (77 °F), lows around 16 °C (61 °F), rain on about 9 daysHighs around 77 °F (25 °C), lows around 61 °F (16 °C), rain on about 9 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Chuseok (harvest festival) big impact
Chuseok: 24–26 Sep 2026 (passed); about 14–16 Sep 2027 (check) · South Korea
Same three-day shutdown as Seollal; the largest travel peak of the year.
Crowds and prices
- Crowds · South Korea overall
- Medium
- Prices · South Korea overall
- Medium
South Korea overall: Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
Compare two months
Weather, crowds and prices for any two months in Donghae, side by side.
Verdict
Sep: Great
May: Great
Daytime high
Sep: 25 °C (77 °F)77 °F (25 °C)
May: 22 °C (72 °F)72 °F (22 °C)
Night low
Sep: 16 °C (61 °F)61 °F (16 °C)
May: 12 °C (54 °F)54 °F (12 °C)
Rain days
Sep: 9
May: 8 (better)
Crowds
Sep: Medium
May: High
Prices
Sep: Medium
May: High
Festivals listed
Sep: 1
May: 0
September: Inside Donghae's best window: May–Jun, Sep–Oct.
May: Inside Donghae's best window: May–Jun, Sep–Oct.
Donghae: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.