Is your ferry crossing rough? Route by route
The same stretch of water can be a shrug or a story depending on the route, the boat and the month. A 30 minute hop can outdo an overnight crossing when the water under it is tide-torn or open to ocean swell, and the fast catamaran that saves you an hour is usually the boat that makes you feel every wave. Pick your route below for what drives it, the worst months, which vessel to choose and where to sit.
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Every route at a glance
Reputation summarises what passengers and published marine information commonly report for each route, not a forecast for your sailing. More routes join this list as they are researched.
Three things decide how a crossing feels
The water. Shallow sounds build short steep chop in hours; open-ocean routes carry long swell that outlives the wind; tide-race waters like the Pentland Firth are rough on windless days. The route page names which one you are getting.
The boat. A heavy conventional ferry and a light fast catamaran turn the same sea into two different rides. Where a route offers both, the slower ship is nearly always the steadier one, and it keeps sailing on days the fast craft cancels.
The format. Overnight routes let you cross the roughest water lying down in a midship cabin, which is the position motion is easiest to tolerate. A rough 3 hour afternoon and a rough night you sleep through are very different experiences of the same sea.
Where to sit on each ferry
On every route here, the middle of the vessel on a low passenger deck moves least. By day, pick a seat there with the horizon in view. What changes from route to route is how much it matters and which seats on that boat to skip. For why the bow and stern move more, read bow or stern: where to sit on a boat or ferry.
UK and Ireland
Best: Midship. Skip: Bow (front).
Book a cabin midship and low; on 12 or more hours of open water, cabin position is the difference between sleeping and counting the rolls.
Best: Midship. Skip: Bow (front).
The Superfast ships are large for this water; a midship lounge seat keeps you near the pivot point for the exposed middle hour.
Best: Midship. Skip: Bow (front).
Stay low and central, and pick a seat with a view out. The bow lounges get the most vertical movement when the strait is chopping.
Best: Midship. Skip: Bow (front).
Midship, low, window if you can. On the overnight sailing take the cabin; the ships are big enough that a central berth turns most gales into background noise.
Best: Midship. Skip: Bow (front).
On the fast craft, sit as central and as low as the layout allows; on the big ferries, a midship lounge seat with a window does the job.
Best: Midship. Skip: Bow (front).
Cabins are the point of this route: choose one midship and low, and the southern North Sea's chop becomes something you hear rather than feel.
Best: Midship. Skip: Bow (front).
Cabin choice is the decision that matters: midship, low deck. The panoramic high-deck cabins move the most when the sea is up.
Penzance to St Mary's (Isles of Scilly)
Best: Midship. Skip: Bow (front).
Midship, low, and outside if the weather allows; the open aft deck with the horizon in view is many regulars' choice over the enclosed lounges.
Best: Midship. Skip: Bow (front).
Midship, low deck, horizon in view. On overnight sailings a central cabin low in the ship is the single best purchase on this route.
Best: Midship. Skip: Bow (front).
Midship cabin, low deck, booked early. With two nights at sea, cabin position does more for comfort than anything you can buy on board.
Best: Midship. Skip: Bow (front).
A midship cabin on a low deck is the whole game on a two-night crossing. Motion grows with every deck of height and every metre towards bow or stern.
Best: Midship. Skip: Bow (front).
Midship with a view out. The crossing passes the Old Man of Hoy; watching the cliffs go by gives your eyes exactly the fixed reference they want.
Northern Europe
Best: Midship. Skip: Bow (front).
On a stormy day, the central seating areas on lower passenger decks move least; on calm days, sit wherever the view is.
Best: Midship. Skip: Bow (front).
Book a midship cabin low in the ship and consider it part of the fare, not an upgrade; this is an ocean passage with a ferry timetable.
Best: Midship. Skip: Bow (front).
These ships are hotels with engines, but physics still applies: midship cabins low down move least when the Skagerrak is working.
Best: Midship. Skip: Bow (front).
Midship cabins low in the ship sleep steadiest through the open Aland Sea and Gulf of Finland stretches.
Best: Midship. Skip: Bow (front).
Midship, low deck. The open Baltic leg passes overnight, so a central berth converts most storms into background rhythm.
Best: Midship. Skip: Bow (front).
Position barely matters on the archipelago legs; for the short open section on a stormy day, midship and low as always.
Southern Europe
Barcelona to Palma de Mallorca
Best: Midship. Skip: Bow (front).
Cabin midship and low on overnight sailings; seat passengers should pick central lounges rather than the high forward salons.
Best: Central, low deck. Skip: Front rows.
On the catamarans, the central seats on the lowest passenger deck move least; the forward lounges amplify every wave.
Best: Central, low. Skip: Front rows.
On hydrofoils and fast craft, sit central and low and skip the front cabin; on the ferries, anywhere with a horizon view works.
Best: Midship. Skip: Bow (front).
Book a cabin midship on a lower deck rather than an airline seat high forward; on a meltemi night the difference is the whole night's sleep.
Best: Central, low. Skip: Front rows.
On the catamarans, central low seats ride best; the front rows take the slams on a choppy channel day.
North America
Bar Harbor to Yarmouth (The CAT)
Best: Central, main deck. Skip: Front rows.
Central main-deck seats ride the catamaran's motion best; the forward panoramic rows are the bounciest on a swell day.
Best: Midship. Skip: Bow (front).
Midship on the main deck for the breezy days; the open upper decks are the pleasure of the calm ones.
Fort Myers Beach to Key West (Key West Express)
Best: Central, main deck. Skip: Front cabin.
Central main-deck seats ride best; the open rear decks add horizon and air. The forward cabin is the bounce zone in a front's chop.
Best: Central, main deck. Skip: Front rows.
On the fast boats, central main-deck seats; on the car ferries, midship benches with a window. Both beat the bow in chop.
Best: Central, main deck. Skip: Front cabin.
Central main-deck seats, or the open rear deck with the horizon; the enclosed front cabin over the bows moves most.
North Sydney to Port aux Basques
Best: Midship. Skip: Bow (front).
Book a cabin midship for overnight sailings, and midship seating by day; seven hours rewards the choice on any lively crossing.
Best: Central cabin. No seats to skip on most days.
Seat choice is a scenery decision here, not a motion one; the bow-facing seats give the skyline or the Olympics depending on direction.
Vancouver (Tsawwassen) to Victoria (Swartz Bay)
Best: Central decks. No seats to skip on most days.
On a windy winter day the central seating rides best; the rest of the year, sit wherever the Gulf Islands view is.
Caribbean and Latin America
Buenos Aires to Colonia del Sacramento
Best: Central seating. No seats to skip on most days.
Any seat works most days; on a sudestada day, central seating on the main deck is the steady pick.
Best: Central, lower deck. Skip: Front rows.
Sit central on the lower deck; the upper deck's view costs extra motion, and the front rows take the slams on choppy afternoons.
Australia and New Zealand
Geelong to Devonport (Spirit of Tasmania)
Best: Midship. Skip: Bow (front).
Book a cabin midship on a lower deck rather than a recliner; the mid-strait hours fall around the middle of the night.
Best: Midship. Skip: Bow (front).
Midship with a horizon view for the strait section; the Sounds leg afterwards is calm enough for anything.
Asia
Bali (Padangbai) to Gili Trawangan
Best: Central, low. Skip: Front cabin.
Sit central and low inside, or on the shaded rear deck with the horizon; the front cabin over the bow is the slamming zone.
Best: Midship. Skip: Bow (front).
Midship berths low in the ship sleep steadiest; the shared tatami rooms let you claim a central patch of floor, which works surprisingly well.
Best: Central, low deck. Skip: Front rows.
Book or pick central main-deck seats; the upper-deck and front-row seats amplify the jetfoil's pitching in chop.
Africa
Best: Central, main deck. Skip: Front cabin.
The central main-deck seats ride best; the premium front lounges look inviting and move the most in swell.
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Frequently asked questions
Which ferry routes are the roughest?+
Among routes on this list, the short crossings over tide-driven water (the Pentland Firth routes, Foveaux Strait to Stewart Island) and the open-ocean runs (Hirtshals to the Faroes, the Bay of Biscay ferries, Bass Strait) carry the strongest reputations. Rough is not the same as long: a 30 minute hop across an exposed sound can outdo a 19 hour sheltered cruise ferry. Each route page shows what drives its particular water and which months are worst.
Is a fast catamaran or a conventional ferry better for seasickness?+
Conventional, almost every time it is rough. A light catamaran hull at speed cannot push through short steep waves, so it rides over and slams into them, turning the sea into sharp, high-frequency motion. A heavy displacement ferry shoulders through the same water with a slower roll most people tolerate far better. Fast craft are also the first sailings cancelled when weather arrives, which is the operators' own verdict on the difference.
Do ferries cancel when it is too rough?+
Fast craft and small vessels cancel or re-time first; large conventional ferries sail through most weather and delay only for the severe end. On lifeline routes (island communities, freight corridors) operators run in conditions leisure travellers would not choose. A cancelled fast-ferry sailing with a conventional alternative still running is useful information: take the bigger ship.
Should I take seasickness tablets before a ferry crossing?+
That is a decision for a pharmacist or doctor, who can weigh your health, other medicines and whether you are driving at the other end. The planning fact that matters: most motion sickness medicines are labelled to be taken before departure rather than once symptoms start, so whatever you decide needs deciding at the terminal, not mid-crossing.
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Conditions described across this cluster are typical seasonal patterns drawn from published marine and operator information as of September 2026, not forecasts. Route, vessel and operator names are trademarks of their respective owners; Dizzout is not affiliated with or endorsed by them. This page is informational and not medical advice.