Shikoku Kisen's own cancellation notices, plus the wind and fog on the Uno and Takamatsu crossings — the weather that stops the boats to a bridge-less island.
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Naoshima has no bridge — every trip on or off the island is a ferry, and fog, strong wind and typhoons do cancel them. This page pulls Shikoku Kisen's own operation notices together with the wind and fog on each crossing, so you can see the weather coming and check the official word before you set out.
Right now
No operation notices from Shikoku Kisen right now
Shikoku Kisen — operation status (運航情報) posts any cancellations as they happen — always check it before you travel.
The weather on the crossings
Uno ⇄ Miyanoura
The frequent, late-running link to Uno (Okayama). The last car ferry off Miyanoura is at 20:25, the last passenger boat around 21:15 — with a night sailing around 00:15.
Right now: a gentle breeze (about 13 km/h), clear (over 10 km).
When
Strongest wind
Lowest visibility
Today · Mon 12 Oct
a gentle breeze (about 16 km/h, gusts to 22)
dense fog (150 m)
Tomorrow · Tue 13 Oct
a gentle breeze (about 14 km/h, gusts to 25)
dense fog (200 m)
The day after · Wed 14 Oct
a moderate breeze (about 23 km/h, gusts to 42)
misty (2 km)
Forecast updated .
Takamatsu ⇄ Miyanoura
The longer, more exposed run across Bisan-Seto to Takamatsu (Kagawa). The last high-speed boat off Miyanoura is around 19:45.
Right now: light air (about 1 km/h, gusts to 7), clear (over 10 km).
When
Strongest wind
Lowest visibility
Today · Mon 12 Oct
a moderate breeze (about 19 km/h, gusts to 24)
clear (7 km)
Tomorrow · Tue 13 Oct
a gentle breeze (about 17 km/h, gusts to 26)
clear (6 km)
The day after · Wed 14 Oct
a fresh breeze (about 33 km/h, gusts to 55)
misty (2 km)
Forecast updated .
The official word
Fog, strong wind and typhoons are what stop the boats here — the Seto Inland Sea is sheltered, so it is rarely the waves. Whether a sailing runs is Shikoku Kisen's decision, and the captain's, usually made about an hour before departure; there is no fixed wind or visibility figure that cancels a boat. This page reads the weather and shows the operator's own notices — it does not make the call, and it is not a substitute for checking the operation-status page before you travel. In a typhoon, expect planned suspensions announced a day ahead.
Shikoku Kisen posts cancellations (欠航) and planned typhoon suspensions (計画運休) to this page, usually the evening before or the morning of a disruption. It is the authoritative word — this tool links straight to it.
Wind and visibility are open-water model forecasts for each crossing, not readings from a boat — conditions near the shore and in the channels differ, and the figures come on a coarse (~25 km) grid. The wind follows the Beaufort scale and the visibility the WMO/NWS fog scale; they describe the air and water, and are never a judgement that a crossing will run or is safe. Weather data by Open-Meteo (CC BY 4.0); operation notices by Shikoku Kisen.