Whales and dolphins are frequent guests in Scottish offshore waters. Though the most common are Minke whales, one might also come across other species including Orcas, Humpbacks, Fins, and Sperms.
The best site to encounter these mammals is the Inner and the Outer Hebrides inhabited by both whales and dolphins. The Shetland Islands and the Orkney Islands provide whale watching opportunities, whereas Moray Firth is renowned for bottlenose dolphin population. The season runs from April to September, but if you are willing to go further offshore you can spot them as late as November.