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Seto Ohashi Bridge

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Seto Ohashi Bridge Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Seto Ohashi Bridge year round climate

  • Spring (March–May): Average 10.6–18.9°C, mild and comfortable climate, but with relatively high rainfall; prepare for rain. Common activities: enjoying the outdoors, flower viewing (such as cherry blossoms and peach blossoms, depending on actual blooming conditions). Recommended clothing: light jacket, long-sleeved shirt and pants.
  • Summer (June–August): Average 23.1–29.6°C, hot and humid with relatively high rainfall; pay attention to heatstroke prevention. Common activities: seaside activities (pay attention to safety), visiting indoor attractions. Recommended clothing: light and breathable clothing, sun hat, sunglasses.
  • Autumn (September–November): Average 19.8–27.0°C, comfortable climate, rainfall gradually decreases. Common activities: outdoor activities, viewing autumn leaves (depending on actual leaf color change conditions). Recommended clothing: comfortable long-sleeved shirt and pants, light jacket.
  • Winter (December–February): Average 6.4–8.6°C, low temperature, dry and cold with relatively low rainfall. Common activities: indoor leisure activities, onsen experience. Recommended clothing: warm jacket, sweater, scarf, gloves.

Seto Ohashi Bridge climatological average

Annual average temperature: approx. 17.4°C / Annual rainfall: approx. 1141 mm / Summer humidity: 70%–80% / Rainiest month: June

Seto Ohashi Bridge monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
6.4°C
28
February
6.5°C
54.6
March
10.6°C
93.9
April
15.6°C
110.7
May
18.9°C
145.9
June
23.1°C
205.5
July
28°C
134.7
August
29.6°C
116.2
September
27°C
101.8
October
19.8°C
59.6
November
14.6°C
72.8
December
8.6°C
17.7

Seto Ohashi Bridge weather for the next seven days

12/25
Thursday
Moderate rain
12°C/5.8°C
12/26
Friday
Patchy rain nearby
6.7°C/3.2°C
12/27
Saturday
Patchy rain nearby
6.9°C/4°C
12/28
Sunday
Sunny
8.5°C/5.2°C
12/29
Monday
Sunny
11°C/4.6°C
12/30
Tuesday
Patchy rain nearby
11.4°C/9.1°C
12/31
Wednesday
Sunny
9.5°C/6.5°C

Seto Ohashi Bridge Frequently Asked Questions and Useful Information for Travel

How long is the Seto Ohashi Bridge?

The Seto Ohashi Bridge is a remarkable long-span bridge measuring 9.4 kilometers (5 miles) in length. It elegantly connects the mainland of Japan to Shikoku Island, gracefully arching over the beautiful Seto Inland Sea and its numerous islands.

What is the history behind the Seto Ohashi Bridge?

The Seto Ohashi Bridge was constructed to replace an older drawbridge system that caused significant traffic delays whenever ships needed to pass. The new bridge revolutionized travel by eliminating these halts, ensuring a smoother flow of traffic between the mainland and Shikoku Island.

What makes the Seto Ohashi Bridge unique?

The Seto Ohashi Bridge is a marvel of engineering, designed to offer uninterrupted passage. It rises elegantly over the Nakaumi lake, creating a stunning visual experience as it links Matsue and Sakaiminato, offering a more efficient and modern way to traverse the region.

Is the Seto Ohashi Bridge a safe structure?

Yes, the Seto Ohashi Bridge is a very safe and robust structure. While it has an impressive and towering presence that allows ships to pass underneath with ease, it is engineered to the highest safety standards, providing a secure passage for all travelers.

What are the best ways to experience the Seto Ohashi Bridge?

Visitors can best experience the Seto Ohashi Bridge by driving or taking a train across it. Enjoy the breathtaking panoramic views of the Seto Inland Sea from the bridge. Consider visiting local observation points for unique photo opportunities of this architectural wonder.