Weather

The Isles of Scilly, located 28 miles off the Cornish coast in England's southwestern most region, enjoy a mild maritime climate.

The weather is mild year-round due to the surrounding sea, but each season has its own unique characteristics. Here’s a seasonal overview of the weather in the Isles of Scilly, along with top tips to ensure you have the best experience no matter when you visit.

For the latest weather information, please visit the Met Office website.

BY SEASON

Spring (March to May)

• Temperature: 9–14°C (48–57°F)
• Overview: Spring arrives early in the Isles of Scilly compared to mainland Britain. The islands burst into colour with blooming flowers, particularly daffodils and the fragrant narcissi, which thrive here.
• Rainfall: Moderate, but there are plenty of dry, sunny spells.
• Winds: Generally light to moderate, though occasional Atlantic breezes can be felt.
• What to Expect: A peaceful time to visit with fewer tourists and pleasant weather for outdoor activities such as walking or exploring gardens like Tresco Abbey Garden. It also kick-starts the islands’ annual programme of festivals with Walk Scilly (April) and the World Pilot Gig Championships (May).

Summer (June to August)

• Temperature: 15–21°C (59–70°F)
• Overview: Summers are warm but rarely over hot, with long daylight hours. The sea temperature also warms up, making it an excellent time for water activities such as kayaking, sailing, wild-swimming and snorkelling.
• Rainfall: Relatively low compared to other seasons, but occasional showers may occur.
• Winds: Light breezes provide cooling relief.
• What to Expect: The busiest season for tourism, with a lively atmosphere, plenty of outdoor activities, markets, and al fresco dining. Exploring Scilly’s beaches and scenic coastal walks are especially popular.

Autumn (September to November)

• Temperature: 11–17°C (52–63°F)
• Overview: Autumn in the Isles of Scilly is mild and often sunnier than on the mainland. September often feels like an extension of summer.
• Rainfall: Increases slightly as the season progresses.
• Winds: Winds can pick up, particularly in late autumn.
• What to Expect: A tranquil vibe returns to the islands. The scenery is stunning, with golden hues and opportunities to spot migrating birds, making it a great time for nature enthusiasts.

Winter (December to February)

• Temperature: 7–12°C (45–54°F)
• Overview: Winters are mild and wet, with few frosts or snow. Despite the season, the Isles of Scilly remain one of the warmest places in the UK.
• Rainfall: Higher than in other seasons, with occasional stormy weather.
• Winds: Stronger winds are more common, especially during Atlantic storms.
• What to Expect: A peaceful, off-season experience with dramatic coastal scenery and cosy places to stay. While some attractions and services may be closed, it’s a great time for storm-watching or quiet retreats.

General Tips

• Packing: Layers, a waterproof jacket, and sturdy shoes are essential year-round. Get ready to explore!
• Travel: Check transport schedules, especially in winter, as weather conditions such as low cloud or fog and strong winds can sometimes disrupt ferry or flight services.
• Seasonal Highlights: Spring for flowers, summer for beach activities, autumn for birdwatching, and winter for a serene escape.