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The Ultimate Helsinki Island Hopping Mega-Guide: Vallisaari, Lonna & Suomenlinna

Pure Wilderness in the City

Escape the city with the ultimate Helsinki island hopping guide. Discover how to visit Vallisaari, Lonna, and Suomenlinna like a local using HSL ferries, with tips on saunas, nature trails, and the best island food.

The Soul of the Sea: Why You Must Go Island Hopping

Helsinki is defined by its relationship with the Baltic Sea. With an archipelago of over 300 islands, the “Pure Wilderness in the City” is never more than a short boat ride away.

For a local, island hopping isn’t a luxury tour — it’s an everyday escape. In just 15–20 minutes, you can swap the city’s buzz for historic fortress walls, wild coastal forests, or a secluded seaside sauna. This guide covers the three most iconic stops — Suomenlinna, Lonna, and Vallisaari — and gives you the smart traveler tips to navigate them with ease.

1. Practical Guide: Ferries, Tickets & Piers

To island hop like a professional, you need to know the “HSL Secret.”

The HSL Ferry (The Local Way)

You can reach Suomenlinna (and seasonally Vallisaari) using the standard HSL (Helsinki Regional Transport) ticket. If you have an AB-zone day pass or a single ticket on your HSL App, the ferry ride is included.

• Departure Point: The HSL Suomenlinna ferry leaves from the eastern side of Market Square (Kauppatori), right across from the Presidential Palace.
• Address: Kauppatori, 00170 Helsinki
• The Private Ferries: To reach Lonna or to get a direct route between the islands, you may need a private water bus (e.g., FRS Finland or JT-Line), which departs from the center of Market Square.

Pro Tip: Download the HSL App before you head out to check real-time schedules and buy your ticket digitally.

Link: HSL Journey Planner

2. Suomenlinna: The Living Fortress

A UNESCO World Heritage site since 1991, Suomenlinna is a massive sea fortress built across six islands. It is not just a museum; it’s a living neighborhood with 800 residents.

What to Do

• The Tunnels: Explore the dark, historic stone tunnels (especially near the Kustaanmiekka artillery). Local tip: Bring a small flashlight or use your phone’s light!
• The Lighthouse Church: The Suomenlinna Church is unique because its steeple also serves as a working lighthouse for sea traffic.
• King’s Gate: Walk to the southernmost tip to see the grand ceremonial entrance to the fortress.

Eat & Drink

• Suomenlinna Brewery: Located right by the main jetty, offering locally crafted beers in a historic vaulted cellar.
  • Address: Suomenlinna C1, 00190 Helsinki
  • Website: Suomenlinna Brewery
• Cafe Silo: A cozy spot for a quick coffee and pastry before exploring the walls.
  • Address: Suomenlinna C 31, 00190 Helsinki

3. Lonna: The Relaxing Pit-Stop

Lonna is a tiny island located between Market Square and Suomenlinna. Once a base for demining naval mines, it has been transformed into a bohemian summer oasis.

What to Do

• The Lonna Sauna: This modern wooden sauna is one of the most beautiful in the city. It offers a soft, traditional steam (löyly) and a terrace with stunning views of the outer archipelago. Note: Booking in advance is highly recommended.
  • Website: Lonna Sauna
• The Waffle Bar: Lonna is famous for its sweet and savory waffles — the perfect fuel for an island hopper.
  • Website: Lonna

4. Vallisaari: The Wild Frontier

Vallisaari was a closed military area for decades, allowing its nature to flourish undisturbed. Today, it offers some of the most diverse flora and fauna in the Helsinki archipelago.

What to Do

• The Alexander Tour (3 km): This marked trail takes you through lush forests and old battery ruins.
• The 360-degree View: Head to the Kuninkaansaari lookout point for a breathtaking view of the open Baltic Sea on one side and the Helsinki skyline on the other.

Eat & Drink

• IISI Bistro: This is our top recommendation for the Best Salmon Soup Helsinki has in the archipelago. They serve a rich, creamy lohikeitto with sweet archipelago bread (saaristolaisleipä) on a sun-drenched wooden deck.
  • Address: Vallisaari, 00860 Helsinki
  • Website: IISI Bistro

FAQ: Helsinki Island Hopping

Can I visit the islands in winter?

Suomenlinna is accessible year-round via the HSL ferry. However, Lonna and Vallisaari are primarily summer destinations (open May through September).

Is island hopping accessible for strollers or wheelchairs?

The HSL ferries are accessible. Suomenlinna has a marked “accessible route,” but be prepared for uneven cobblestones in the fortress area. Vallisaari’s main trails are wide but can be hilly.

Can I bring my own food?

Absolutely! Many locals pack a picnic and find a smooth granite rock by the sea to enjoy it. Just remember the local rule: Leave no trace. Bring all your trash back to the city or use the provided recycling bins.

Ready to Explore More?

After returning to the mainland, keep the “Authentic Finland” vibes going:

• The Ultimate Guide to the Best Salmon Soup in Helsinki — learn the secrets of the soup you just ate at IISI Bistro
• Helsinki Public Sauna Guide — if you missed the sauna on Lonna, check out Löyly or Sompasauna
• Helsinki Seaside Walks & Coastal Cafes — discover the best coffee spots on the shoreline, like Cafe Regatta

This guide is updated regularly. Ferry schedules and island opening hours may change — check the HSL App or island websites before visiting.