Why Do Orcas Attack Yacht Rudders? A Skipper's Guide to the Iberian Orcas

Last updated: 10 October 2026

Do orcas really attack yachts? Yes. Since 2020, a small group of orcas off Spain and Portugal has been ramming sailing yachts, and several boats have sunk. But the strangest part isn't that they hit boats. It's what they hit: almost always the rudder.

Where this is happening

Almost every interaction has been reported around the Iberian Peninsula: the Strait of Gibraltar, the Gulf of Cadiz, the Portuguese coast and, more recently, Galicia in north-west Spain.

The orcas involved belong to the small Iberian population, around 50 animals. Only about 15 of them interact with boats, and most of those are young.

The pattern started in 2020 and turned serious in July 2022, when the first sinkings happened. By October 2025, seven yachts had been sunk. In July 2026, another yacht sank off Estaca de Bares in Galicia after orcas repeatedly hit its rudder. The two people on board were rescued unharmed.

Why the rudder?

This is the real mystery. In most reports, the orcas ignore the hull, the keel and the people. They go for the rudder, push it, bite it and turn the boat with it.

Researchers still don't fully agree why. The main theories:

• Play. Young orcas are curious and social. A moving rudder may simply be an interesting toy.
• A learned fad. Orcas copy each other. One behaviour can spread through a group, like a trend.
• Sound and vibration. Some think the steering system itself, moving and vibrating, draws their attention.
• Food. Some researchers link the timing and area to the bluefin tuna migration, which the orcas follow.

What skippers do agree on: once the rudder stops moving, or breaks, the orcas often lose interest and leave. That suggests they're not targeting the yacht. They're targeting the steering.

Why boats sink

A rudder is not just a blade hanging off the back. It goes through the hull on a shaft called the rudder stock. If the orcas push hard enough, they can bend the stock or break the rudder bearings. That can crack the hull around it and let water in.

Spade rudders, the most common type on modern production yachts, have no skeg in front of them for protection, so they take the full force.

When and where the risk is highest

Peak season overall is April to August. In recent seasons, reports have tended to start near Gibraltar and the Gulf of Cadiz, then move north along Portugal towards Galicia as the summer goes on.

Most interactions have been in water deeper than 40 metres, but in 2025 orcas were also reported in shallower water and inside the Galician rias.

The safer route past Gibraltar

The main advice from the Spanish and Portuguese authorities and from sailing organisations is simple:

1. Avoid April to August in the risk areas, if your plans allow it.
2. Stay shallow. Keep within about 2 nautical miles of the coast, in water less than 20 metres deep.
3. Follow the 20-metre line along the coast towards Gibraltar via Cadiz, instead of cutting across open water.
4. Watch the lee shore. Hugging the Portuguese coast in an onshore wind brings its own risks. Plan your weather carefully.
5. Check the latest reports before you leave. The Cruising Association runs a long-term database of interactions, and Noonsite publishes updates.

If orcas approach your boat

Official advice has changed over the years, so check current guidance before your passage. Common points from authorities and experienced skippers:

• Stay calm, keep everyone inside the cockpit or the cabin, and hold on.
• Report your position on VHF, and call for help early if steering or the hull is damaged.
• Check the bilge and the rudder area for water as soon as it's safe.
• Never try to hurt the orcas. They're a protected and endangered population. Throwing objects, using firecrackers or other deterrents is illegal and can make things worse.
• Report the interaction afterwards, even if nothing happened. Every report helps researchers.

Captain's note

The Iberian orcas aren't monsters, and they're not hunting sailors. They're one of the strangest wildlife stories at sea right now. Respect them, plan your route around them, and keep your rudder and your crew safe.

See you on the water,
Captain Phil

Sources: Noonsite, Euro Weekly News.