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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 65–74°F, 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 79–82°F, 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 69–80°F, 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 59–63°F, 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. 72.3°F / Annual rainfall: approx. 88 mm / Summer humidity: 60%–70% / Rainiest month: October

Guishan Island monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
59.5°F
0.9
February
63.1°F
2
March
65.1°F
1.3
April
74.5°F
4.2
May
74.3°F
5.9
June
79.9°F
7.4
July
82.8°F
15.1
August
82.4°F
6.3
September
80.8°F
8.9
October
75.4°F
23.4
November
69.3°F
8.8
December
60.6°F
4.3

Guishan Island weather for the next seven days

8/24
Monday
Light rain shower
76.4°F/74°F
8/25
Tuesday
Torrential rain shower
76.7°F/74.3°F
8/26
Wednesday
Overcast
88.9°F/73.4°F
8/27
Thursday
Overcast
86.5°F/75°F
8/28
Friday
Moderate or heavy rain shower
77.6°F/75°F
8/29
Saturday
Patchy rain nearby
84.8°F/76.1°F
8/30
Sunday
Patchy rain nearby
84.7°F/75.3°F

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.