Jellyfish sightings in Scotland are most common during July and August, a period considered peak season for the creatures. This increase is influenced by factors such as sea temperatures, the availability of plankton for feeding, and ocean currents, according to Anna Bunney of the Marine Conservation Society.
Sea temperatures tend to be warmest in August and September, lagging behind maximum air temperatures which usually occur in July and August. Warmer sea conditions contribute to an increase in jellyfish numbers and distribution, as breeding speed rises and calmer ocean conditions push them towards the shore.
While jellyfish stings in Scotland are generally not life-threatening, they can be very painful. The Lion's Mane jellyfish, a brownish-orange species prevalent in Scotland's coastal waters during summer, has long tentacles that can deliver a sore sting. Even jellyfish washed ashore can still sting, so it is important not to touch them.
The Marine Conservation Society advises caution around jellyfish and recommends swimming calmly away from them. Most species found in Scotland have mild stings, causing only minor irritation, and some are completely harmless. The society encourages people to learn about different species and report sightings.