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Shirahama Onsen

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Shirahama Onsen Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Shirahama Onsen year round climate

  • Spring (March–May): Average 9.9–18.2°C, mild climate but with relatively high rainfall, especially in April and May. Popular activities: Onsen bathing, coastal walks, appreciating Wakayama Prefecture's natural scenery. Recommended clothing: Light jacket, long-sleeved shirts and pants, rain gear.
  • Summer (June–August): Average 22.6–28.5°C, hot and humid with relatively high rainfall. Popular activities: Beach activities, water sports, nighttime firework displays. Recommended clothing: Light and breathable clothing, sunscreen, rain gear.
  • Autumn (September–November): Average 18.6–13.1°C, comfortable and pleasant climate with gradually decreasing rainfall. Popular activities: Onsen bathing, appreciating autumn leaves, enjoying local cuisine. Recommended clothing: Light jacket, long-sleeved shirts and pants.
  • Winter (December–February): Average 6.5–5.5°C, cold and dry with the least rainfall. Popular activities: Onsen bathing, enjoying Ryokan facilities, appreciating winter seascapes. Recommended clothing: Warm jacket, sweaters, scarf, gloves.

Shirahama Onsen climatological average

Annual average temperature: approx. 16°C / Annual rainfall: approx. 1402 mm / Summer humidity: 70%–80% / Rainiest month: June

Shirahama Onsen monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
4.8°C
22.8
February
5.5°C
47.2
March
9.9°C
118.5
April
15.3°C
169.3
May
18.2°C
187.1
June
22.6°C
189.5
July
27.6°C
148.1
August
28.5°C
155.8
September
26.5°C
125.8
October
18.6°C
108.7
November
13.1°C
114.1
December
6.5°C
15.6

Shirahama Onsen weather for the next seven days

8/11
Tuesday
Sunny
29.4°C/21.7°C
8/12
Wednesday
Patchy rain nearby
26.1°C/23.8°C
8/13
Thursday
Patchy rain nearby
26.1°C/23.1°C
8/14
Friday
Sunny
29.3°C/23.6°C
8/15
Saturday
Sunny
30.2°C/24.7°C
8/16
Sunday
Sunny
29.8°C/24.9°C
8/17
Monday
Sunny
30.7°C/25.4°C

Shirahama Onsen Frequently Asked Questions and Useful Information for Travel

What is the best time to visit?

The climate of Shirahama Onsen is pleasant all year round. Summer is suitable for playing in the water and winter is suitable for bathing.

Which attractions are must-sees?

Must-visit attractions in Shirahama Onsen include the open-air hot spring Saki no Yu, Shirahama Beach, sunset on Engetsu Island, and the spectacular three-story wall.