If you’re searching for things to do in Cornwall, planning one of the best days out in the South West, or looking for unique attractions to visit during your stay, the Isles of Scilly offer an experience unlike anywhere else in Britain.
Just 28 miles off the Cornish coast, the Isles of Scilly feel like a world away. Think white sand beaches, crystal clear waters, stunning island scenery and a relaxed pace of life that’s hard to find elsewhere in the UK.
Scillonian III sails from Penzance to St Mary’s between March and November and is the perfect base for exploring during a day trip. If you’re looking for a unique day out in Cornwall, here are 10 reasons why the Isles of Scilly should be at the top of your list.
1. It feels like visiting another country
One of the most remarkable things about the Isles of Scilly is how different they feel. With clear blue water, palm trees and some of Britain’s most breathtaking beaches, it’s hard to believe you’re still in England.
2. You can reach paradise in a day
Many people assume the Isles of Scilly are only for longer holidays, but they’re surprisingly easy to visit for the day.
Travel aboard Scillonian III from Penzance and spend several hours exploring St Mary’s before returning to Cornwall in the evening. It’s one of the most memorable day trips from Cornwall and allows you to experience island life without needing overnight accommodation.
3. Enjoy stunning beaches, without the crowds
Cornwall is famous for its beaches, but the Isles of Scilly take things to another level. Porthcressa, Town Beach and Porthmellon on St Mary’s boast stunning coastal scenery, yet remain blissfully uncrowded compared with many mainland hotspots, even in the height of summer.
4. Incredible wildlife encounters
The islands are a haven for wildlife enthusiasts, and the adventure begins before you even arrive. During the 2 hour 45-minute ferry crossing on Scillonian III, keep watch for seabirds overhead, dolphins playing in the waves and grey seals along the coastline. The route has been named the UK’s top ferry route for marine wildlife for four consecutive years, making the journey an attraction in its own right. Depending on the season, you may even spot puffins or migrating birds that attract visitors from across the UK.
5. Easy to explore
There’s no rush or traffic jams on the Isles of Scilly. Instead, you’ll find friendly locals, independent businesses and a welcoming atmosphere that invites you to slow down.
St Mary’s is easy to explore on foot, with beaches, cafés, shops and historic landmarks all within reach of the quay. If you’d like to venture further, hire a bike or a Scilly cart and discover more of the island’s hidden corners during your day trip.
6. Steeped in rich history
The Isles of Scilly have a fascinating history stretching back thousands of years. On St Mary’s, visitors can explore ancient burial sites and impressive coastal fortifications. A day trip offers the perfect opportunity to uncover a unique part of Cornwall’s heritage.
7. Fantastic food
Dine on freshly landed seafood or delicious artisan ice cream while taking in the sea views. From waterfront restaurants overlooking the harbour to cosy cafés tucked away in Hugh Town, there’s something to suit every taste and budget.
8. It’s an affordable day out
A trip to the Isles of Scilly is more affordable than you might think. With day trip fares on Scillonian III from just £35 for adults and £17.50 for children, it can cost no more than a visit to some of the South West’s most popular family attractions.
Infants can travel from £10.50 and dogs from £15, making it an easy and affordable day out for the whole family.
Instead of spending the day in queues, you’ll enjoy a unique island adventure and peaceful surroundings.
9. Every journey feels like an adventure
Travelling on board Scillonian III transforms an ordinary day out into an adventure. As Cornwall’s coastline disappears behind you and the islands come into view ahead, the excitement begins long before you reach shore. Look out for the famous Minack Theatre and Land’s End as you leave Penzance and the Eastern Isles when you begin to approach St Mary’s.
It’s one of the few affordable days out in Cornwall where the journey itself becomes a highlight.
10. Your last chance to sail on Scillonian III
2026 marks the final season of Scillonian III, which has proudly served the Isles of Scilly route for nearly 50 years. For generations, the iconic passenger ferry has connected holidaymakers with the Isles of Scilly, becoming a much-loved part of the Scilly adventure. This is your final opportunity to experience a crossing aboard this adored vessel before we welcome Scillonian IV in 2027.
Planning your Isles of Scilly day trip
Scillonian III operates between Penzance and St Mary’s from March to November.
To make the most of your day trip, we recommend:
- Book your travel in advance, especially during peak season.
- Taking advantage of our double sailing days, which give you up to eight hours to explore St Mary’s or the opportunity to hop on an inter-island boat to discover Tresco, St Agnes, St Martin’s or Bryher.
- Arriving in Penzance with plenty of time to check in. Check in closes 30 minutes before departure. Stroll to Penzance Quay and enjoy a relaxing start to your day trip adventure.
- Wearing comfortable shoes, as many of St Mary’s highlights are best discovered on foot.
- Bringing binoculars for the crossing, giving you the best chance for spotting wildlife.
Book your Isles of Scilly day trip and discover why this day trip is one of the best days out in Cornwall.