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Guishan Island

Guishan Island 1
Travel Info
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Travel Info

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Guishan Island Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Guishan Island year round climate

  • Spring (March–May): Average 18.4–23.6°C, mild and comfortable climate, little rainfall, abundant sunshine. Common activities: Whale watching, island tour, hiking. Recommended clothing: Light long-sleeved clothing, light jacket.
  • Summer (June–August): Average 26.6–28.2°C, hot and relatively dry, occasional showers. Common activities: Swimming, water activities, enjoying the sea view. Recommended clothing: Light and breathable short-sleeved clothing, shorts, sun protection clothing.
  • Autumn (September–November): Average 20.7–27.1°C, comfortable and pleasant climate, October is the rainiest month. Common activities: Whale watching, island tour, hiking. Recommended clothing: Comfortable long-sleeved or short-sleeved clothing, light jacket.
  • Winter (December–February): Average 15.3–17.3°C, lower temperatures, little rainfall. Common activities: Enjoying the sea view, watching the sunrise. Recommended clothing: Warm jacket, long-sleeved clothing.

Guishan Island climatological average

Annual average temperature: approx. 22.4°C / Annual rainfall: approx. 88 mm / Summer humidity: 60%–70% / Rainiest month: October

Guishan Island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
15.3°C
0.9
February
17.3°C
2
March
18.4°C
1.3
April
23.6°C
4.2
May
23.5°C
5.9
June
26.6°C
7.4
July
28.2°C
15.1
August
28°C
6.3
September
27.1°C
8.9
October
24.1°C
23.4
November
20.7°C
8.8
December
15.9°C
4.3

Guishan Island weather for the next seven days

3/20
Friday
Moderate rain
19.9°C/18.3°C
3/21
Saturday
Moderate rain
24.4°C/18.8°C
3/22
Sunday
Patchy rain nearby
25.4°C/17.3°C
3/23
Monday
Patchy rain nearby
24.5°C/18.3°C
3/24
Tuesday
Patchy rain nearby
24.4°C/19.8°C
3/25
Wednesday
Patchy rain nearby
26.8°C/18.4°C
3/26
Thursday
Patchy rain nearby
24.9°C/21.4°C

Guishan Island Frequently Asked Questions and Useful Information for Travel

How do I get to Guishan Island?

The main ferry terminal to Guishan Island is Toucheng Wushi Harbor. You can reach the harbor by transferring at Toucheng Railway Station and then taking the Kuo-Kuang Bus – Zhuangwei Shaqiu Green Line 18 or Kamalan Bus - Yilan Jinlanjinhaoxing Line 131.

What are the most popular activities on Guishan Island?

Whale watching and dolphin watching around Guishan Island are incredibly popular. The calmer surrounding waters make it a frequent gathering spot for whales and dolphins. The best time for these sightings is typically from April to September, due to the warmer weather.

What kind of wildlife can be found on Guishan Island?

Guishan Island boasts a rich biodiversity with over 400 species of plants and 120 species of butterflies, snakes, and birds. It is also home to two native Taiwanese species: the endangered Formosan flying fox and the Formosan lily, along with a significant habitat for the Chinese fan palm.

Does Guishan Island have active volcanoes?

Yes, Guishan Island is home to Taiwan's only active volcano. Located 10 kilometers east of Toucheng Township, it is also the largest island in Yilan County and the only island in the county with residents.

What makes Guishan Island unique?

Guishan Island is distinguished by its status as Taiwan's only active volcanic island and the sole inhabited island in Yilan County. Its dramatic volcanic landscape and rich marine life, particularly for whale and dolphin watching, offer a unique travel experience.