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Ganghwa Island

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Ganghwa Island Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Ganghwa Island year round climate

  • Spring (March–May): Average 4.2–15.1°C, mild climate gradually warming, rainfall gradually increasing. Common activities: picnics, flower viewing, cycling. Recommended clothing: light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 20.0–25.3°C, hot and humid, higher rainfall, especially in July. Common activities: swimming at the beach, water sports, island exploration. Recommended clothing: light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 12.8–21.8°C, cool and comfortable, sunny weather, decreased rainfall. Common activities: maple leaf viewing, hiking, harvesting agricultural products. Recommended clothing: comfortable long-sleeved shirts, light jacket, comfortable shoes.
  • Winter (December–February): Average -4.1–-1.6°C, cold and dry, low rainfall. Common activities: enjoying winter scenery, onsen experience. Recommended clothing: warm coat, hat, scarf, gloves.

Ganghwa Island climatological average

Annual average temperature: approx. 11°C / Annual rainfall: approx. 1318 mm / Summer humidity: 70%–80% / Rainiest month: July

Ganghwa Island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-4.1°C
16.3
February
-1.6°C
16.5
March
4.2°C
43.8
April
10.7°C
55.5
May
15.1°C
82.5
June
20°C
171
July
23.8°C
335.2
August
25.3°C
257.9
September
21.8°C
174.8
October
12.8°C
84.2
November
5.9°C
55.2
December
-2.1°C
25.9

Ganghwa Island weather for the next seven days

6/21
Sunday
Partly Cloudy
26.5°C/17°C
6/22
Monday
Partly Cloudy
25.5°C/19.4°C
6/23
Tuesday
Sunny
27.1°C/18.8°C
6/24
Wednesday
Patchy rain nearby
29.1°C/18.9°C
6/25
Thursday
Patchy rain nearby
27.2°C/17°C
6/26
Friday
Sunny
26.8°C/17.7°C
6/27
Saturday
Sunny
27°C/19.2°C

Ganghwa Island Frequently Asked Questions and Useful Information for Travel

How do I get to Ganghwa Island from Seoul?

To get to Ganghwa Island from Seoul, take a bus from Sinchon Bus Terminal. The terminal is accessible via Exit 7 of Sinchon Station on Seoul Subway Line 2. The bus journey to Ganghwa Town typically takes about an hour and 10 minutes. Once you arrive at Ganghwa Terminal, you can catch local buses to various destinations across the island.

What is the history of Ganghwa Island?

Ganghwa Island has a rich and significant history. It was the site of several historical conflicts and expeditions, including the French expedition to Korea in 1866 and the United States expedition to Korea in 1871. The island was also involved in the Battle of Ganghwa and the 1875 Ganghwa Island incident with Japan. In 1876, Korea was compelled to sign the Treaty of Ganghwa, which was named after the island.

What are some recommended attractions on Ganghwa Island?

Visitors to Ganghwa Island can explore a variety of historical and cultural sites. Key attractions include Yongheunggung Palace, the historic Shin Arirang, and the atmospheric Night of Ganghwa & Heritage Story events. You can also visit the beautiful Ganghwa Anglican Church and the significant Goryeogung Palace Site.

What is the significance of the Ganghwado incident?

The Ganghwado incident, also known as the Japanese Battle of Ganghwa or the Un'yō incident, was a military engagement that took place near Ganghwa Island on September 20, 1875. This clash occurred between the Joseon Dynasty of Korea and Japan.

What can I do for cultural experiences on Ganghwa Island?

Ganghwa Island offers numerous cultural experiences, allowing visitors to immerse themselves in its heritage. Explore historical palaces like Yongheunggung Palace and the Goryeogung Palace Site. Witness traditional performances or events like the Night of Ganghwa & Heritage Story. The Ganghwa Anglican Church also stands as a testament to the island's unique cultural blend.