Is the Strait of Bonifacio rough? What to expect on the crossing
Often in winter and spring, less so in summer. The crossing is only about 50 minutes, but the strait is 11 km wide at its narrowest and gale-force mistral blows through it. The strait is notorious among sailors for its weather.
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Strait · Corsica and Sardinia · Reputation among passengers: has a long-standing reputation for rough passages.
- Low
- Moderate
- High
- Very high
Roughness summarises typical reported conditions for this crossing, not a forecast for any given sailing.
Mistral squeezed through an 11 km gap
In the Nausea Index table of the 121 sea crossings we cover, the Strait of Bonifacio is rated rough, one of 34 in that band, with 6 rated higher. Full table: the roughest sea crossings, ranked.
Key facts
- The Strait of Bonifacio is a strait, and passenger reports place it in the high roughness band.
- The mechanism behind that reputation: Mistral squeezed through an 11 km gap.
- Conditions are reported roughest in January, February and March.
- The calmest months are usually June, July and August.
- It is also known as Bocche di Bonifacio.
Why is the Strait of Bonifacio so rough?
The strait is 11 km wide at its narrowest, no more than 100 m deep, and divides the Tyrrhenian Sea from the western Mediterranean. The EUMeTrain weather course says gale-force mistral can create high sea states across the western and central Mediterranean, especially when it blows through the Strait of Bonifacio between Corsica and Sardinia. The Sea of Sardinia lies just west of the strait. A 40-year Mediterranean wave climatology says the western basin has the largest typical waves of any basin in every season except summer, particularly the Sardinian Sea, where the mistral blows persistently.
When is the Strait of Bonifacio roughest?
EUMeTrain says the mistral is most common in winter and in spring, with the strongest episodes between those two seasons, and that gale-force events can occur year-round. A 40-year Mediterranean wave climatology finds the stormy period from November to March, with January the peak, and the calm period from June to August. EUMeTrain adds that most mistrals last one to three days.
| Roughest water in Jan | Roughest water in Feb | Roughest water in Mar | Roughest water in Apr | Roughest water in May | Roughest water in Jun | Roughest water in Jul | Roughest water in Aug | Roughest water in Sep | Roughest water in Oct | Roughest water in Nov | Roughest water in Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Roughest | Roughest | Roughest | Rough | Mixed | Calm | Calm | Calm | Mixed | Mixed | Rough | Rough |
Typical seasonal pattern, not a forecast. Any month can deliver a calm crossing or a bad one. Check the marine forecast for your sailing date. Select a month to see every sea and ferry crossing ranked for it.
Where to be on board
Front to back
- Bow (front)Avoid
- MidshipBest
- Stern (aft)OK
The crossing: About 50 minutes
Roughest stretch: Mid-strait, away from both coasts
Midship on a low deck. The crossing is only about 50 minutes, so choose a seat with a clear view of the horizon and stay in it.
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The crossings that cross it
| Route | Typical duration | What to know |
|---|---|---|
| Santa Teresa Gallura to Bonifacio (Moby) | about 50 minutes | A daytime crossing from Sardinia to Corsica. Moby says several sailings run each day and lists the route from 2 April 2026. |
| Bonifacio to Santa Teresa Gallura (Moby) | about 50 minutes | The same water southbound. Moby says you can go and return in a day. |
What helps on this crossing
- Sit midship on a low deck and keep your eyes on the horizon. The crossing is about 50 minutes, so the rough part is short.
- Look at the mistral forecast before you book. EUMeTrain says most mistrals last one to three days, so moving the crossing by a day or two can change the sea you get.
- Put your phone away and breathe slowly through the mid-strait stretch, where the mistral blows through the gap between the two islands.
For the full toolkit see the seasickness guide, or what to do once it has already started. For what the trials actually say about the oldest trick on that list, see the verdict on looking at the horizon. If the rocking follows you ashore afterwards, that is land sickness, which is normal, and it passes.
Frequently asked questions
Is the Strait of Bonifacio rough in July?
July is in the calm period. A 40-year Mediterranean wave climatology puts June to August within a few percent of the minimum wave height. EUMeTrain still says gale-force mistral events can occur year-round.
Is the Strait of Bonifacio rough in March?
March is among the rougher months. The wave climatology counts November to March as the stormy period, and EUMeTrain says the strongest mistral episodes tend to come in the transition between winter and spring.
Why is the Strait of Bonifacio rough?
It is only 11 km wide at its narrowest and 100 m deep at most, and the mistral blows through it. The EUMeTrain course says that wind can create high sea states across the western and central Mediterranean, especially where it blows through this strait.
How long is the ferry from Santa Teresa Gallura to Bonifacio?
Moby lists the crossing at 50 minutes and says several sailings run each day, so a day trip between Sardinia and Corsica is possible.
Is the Strait of Bonifacio rough in winter?
Usually, yes. In a typical year, December is rated rough, January roughest and February roughest. This is the typical pattern, not a forecast for any sailing.
Other crossings
Sources & further reading
Sea conditions described here are typical patterns drawn from published marine and operator information as of July 2026, not a forecast: conditions on any given sailing depend on the weather that day, and any month can deliver a calm crossing or a bad one. Route and operator names are trademarks of their respective owners; Dizzout is not affiliated with or endorsed by them. Seasickness sensitivity varies from person to person; this page is informational and not medical advice.