Trolleskär

Best time to dive

January to December; December to April; June to September

What you might see

• Flamboyant cuttlefishLikely
• NudibranchReliably seen

Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.

Certification & difficulty

Advanced Open Water - advanced conditions (currents/depth); dive within your training.

Snorkelling

Not a snorkel site - Limited viability - remote exposed skerry with swell and current make casual snorkelling impractical for most visitors; primarily a scuba dive site, occasional calm-day surface snorkelling only

Safety notes

Strong currents and exposed westerly swell; remote location requiring boat transport and a good weather window; cold water year-round even in summer at depth; site lies within Vaderoarna Nature Reserve with wildlife-protection rules (avoid disturbing seal haul-outs and nesting birds) - confirm current reserve regulations (foreskrifter) with Lansstyrelsen Vastra Gotaland before diving

Permits & fees

No dive-specific permit found required, but the site is within Vaderoarna Nature Reserve (Lansstyrelsen Vastra Gotalands lan); general reserve regulations protecting seals and birds apply - check current restrictions before the trip (VERIFY)

Permits and operators change - confirm before booking.

Location

Nearest hub: Fjällbacka