ParkChugoku & Shikoku Weather Guide
Onomichi & Shimanami Kaido Weather & What to Wear
Onomichi, Shimanami Kaido, Ikuchijima, Imabari
The Shimanami Kaido area, running from Onomichi, a town of hillside lanes and temples, across bridges over islands like Ikuchijima to Imabari. Annual precipitation is a low 1138mm, with the sunny climate typical of the Seto Inland Sea (temperatures are for Ikuchijima).
- January low
- 1.6℃
- August high
- 31.9℃
- Max snow depth
- —
Forecast
Forecast: Today & the Next 7 Days
JMA forecast issued Oct 22, 11 AM
Every 3 Hours: Today & Tomorrow
- Today3 PMSunny☂ 0%6–9m/s
- 6 PMSunny☂ 0%6–9m/s
- 9 PMSunny☂ 0%6–9m/s
- Tomorrow12 AMSunny☂ 0%6–9m/s
- 3 AMSunny☂ 0%6–9m/s
- 6 AMSunny☂ 0%6–9m/s
- 9 AMSunny☂ 0%6–9m/s
- 12 PMSunny☂ 10%3–5m/s
- 3 PMCloudy☂ 10%3–5m/s
- 6 PMCloudy☂ 50%6–9m/s
- 9 PMRain☂ 50%6–9m/s
Weather and wind are for the wider area; temperature is for the main forecast point. Chance of rain is for the 6-hour period. There is no 3-hourly temperature forecast for this area, so temperatures are not shown.
- Today10/22(Thu)Sunny25°/15°Observed: 15°☂ 0%
- Tomorrow10/23(Fri)Sunny, then rain22°/12°☂ 50%
- 10/24(Sat)Rain—/—☂ 80%
- 10/25(Sun)Cloudy, rain at times—/—☂ 80%Reliability A
- 10/26(Mon)Cloudy, rain at times—/—☂ 70%Reliability A
- 10/27(Tue)Cloudy, brief rain—/—☂ 50%Reliability C
- 10/28(Wed)Sunny, cloudy at times—/—☂ 20%Reliability A
- ☂ Chance of rain
- From day 3, the weekly forecast covers a wider prefecture-level area.
- Reliability of the weekly forecast (A: high, B: fairly high, C: fairly low)
- "Observed" is the temperature measured so far today by JMA weather stations (AMeDAS), not a forecast.
- Temperatures from day 3 are not shown because the weekly forecast has no point for this area.
- Source: Japan Meteorological Agency (weather forecast)
Best Season
Best Time to Visit Onomichi & Shimanami Kaido
For cycling
April–May and October–November bring highs of around 17–23°C and relatively little rain — ideal for riding the route from Onomichi to Imabari, about 70km at its shortest.
For sea and island views
August has a long 220.7 hours of sunshine, so you can enjoy views of the blue sea and islands. Highs are around 32°C, though, so go easy on daytime exercise.
Climate
Onomichi & Shimanami Kaido Temperature & Snow Through the Year
Monthly high / low temperature (°C)
HighLow
Month by Month
Month-by-Month Weather & What to Wear
| Month | High | Low | Precip. | Max snow depth | What to wear |
|---|---|---|---|---|---|
| Jan | 9.5℃ | 1.6℃ | 39.5mm | — | Warm jacketLight down or winter coat, sweater |
| Feb | 9.9℃ | 1.3℃ | 49.7mm | — | Warm jacketLight down or winter coat, sweater |
| Mar | 13.0℃ | 3.8℃ | 84.4mm | — | Warm jacketLight down or winter coat, sweater |
| Apr | 18.1℃ | 8.5℃ | 88.9mm | — | Long sleeves + jacketLong sleeves with a light jacket or hoodie |
| May | 22.9℃ | 13.4℃ | 108.3mm | — | T-shirt + layerT-shirt, plus light long sleeves for mornings and evenings |
| Jun | 26.0℃ | 18.2℃ | 172.3mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Jul | 30.0℃ | 22.5℃ | 177.6mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Aug | 31.9℃ | 24.0℃ | 89.5mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Sep | 28.3℃ | 20.6℃ | 126.8mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Oct | 22.8℃ | 14.6℃ | 95.9mm | — | T-shirt + layerT-shirt, plus light long sleeves for mornings and evenings |
| Nov | 17.2℃ | 8.7℃ | 59.2mm | — | Long sleeves + jacketLong sleeves with a light jacket or hoodie |
| Dec | 11.9℃ | 3.8℃ | 46.2mm | — | Warm jacketLight down or winter coat, sweater |
Clothing tips are based on the normal high temperature and snow depth. Bring an extra layer for mornings and evenings.
Where to Stay · Agoda
Places to Stay near Onomichi & Shimanami KaidoPR
PR8.7グリーンヒルホテル尾道
★★★★Check rates on Agoda2,674 reviews1.0 km from center
PR7.9尾道国際ホテル
★★★★Check rates on Agoda1,776 reviews2.0 km from center
PR7.9尾道ロイヤルホテル
★★★Check rates on Agoda1,524 reviews0.3 km from center
PR9.0ホテル サイクル
★★★Check rates on Agoda347 reviews1.3 km from center
PR8.4尾道ゲストハウス あなごのねどこ
★Check rates on Agoda483 reviews0.2 km from center
PR9.0さくらホテル 尾道駅前
Check rates on Agoda175 reviews0.8 km from center
Prices and availability are shown on Agoda.
Seasons
Onomichi & Shimanami Kaido Through the Seasons
🌸
Spring
Mar–MayApril highs are around 18°C. The bridges over the sea are windy, so a windbreaker is a good idea.
☀️
Summer
Jun–AugThe rainy season runs from June to mid-July. After it ends, highs are around 30–32°C, and there's little shade, so watch out for heatstroke.
🍁
Autumn
Sep–NovOctober highs are around 23°C, November around 17°C. A good season for cycling.
❄️
Winter
Dec–FebHighs around 10–12°C, mornings around 1–2°C. It hardly ever snows, but cold winds blow on the bridges.
Cherry Blossoms
Cherry Blossoms in Onomichi & Shimanami Kaido
ParkFireworks
Fireworks festivals in Onomichi & Shimanami Kaido
🎆 JulyOnomichi Sumiyoshi Fireworks Festival
Chugoku & Shikoku ・ Onomichi, Hiroshima
🎆 Every year on the Saturday around the 27th day of the 6th month of the lunar calendar (July 25 in 2026)
About 13,000 shells (2026, official)Paid seats
Travel Passes
Travel passes you can use in Onomichi & Shimanami Kaido
🚄 JRJapan Rail Pass
Nationwide ・ Three types: 7, 14 or 21 days. The period of use cannot be extended or changed
From ¥50,000
Plan Your Trip
Plan Your Onomichi & Shimanami Kaido TripPR
Other Areas
Weather in Other Areas
Hiroshima & MiyajimaOkayama & KurashikiIzumo & MatsueTottoriHagi, Tsunoshima & AkiyoshidaiTakamatsu, Naoshima & ShodoshimaTokushima, Naruto & IyaMatsuyama & Dogo OnsenKochi & Shimanto
Back to the Chugoku & Shikoku Weather Guide (all months & areas) →
Source: Japan Meteorological Agency (climate normals 1991-2020). Compiled by tripuuu.log. Temperature and snow figures are normals from the Ikuchijima station; actual weather varies from year to year.
