The Finnish Archipelago is ideal for observing seasonal sky phenomena, like the midnight sun, starry autumn nights, and even the northern lights.

A man looking at the sky.
With little light pollution and wide-open views, Saaristo offers some of the best places in southern Finland to experience seasonal sky phenomena. Keep on reading for tips and tricks for skywatching in the world's largest archipelago.
The midnight sun over the water.
A girl touching flowers.

The Midnight Sun

When: Around summer solstice (mid-June to early July)

Where: Entire archipelago, especially open-view shores and cliffs

How: Stay up late; no need for gear

Cultural tie: Juhannus, Finland’s midsummer celebration, honors light and nature. Bonfires, swimming, traditional midsummer rituals and sauna are part of the experience.

Good places to experience it: Ruissalo cliffs, glamping spots, sauna decks by the sea, local midsummer festivals.


A starry sky.

Stargazing

When: August to early April (best visibility September to December). Best seen after 10 PM on moonless nights.

Where: Anywhere with low light—outer islands, nature cabins, open rocky bays How: Choose a dark, clear night; no equipment needed

Tip → Stay under the stars in tentsiles with Naawa Nature or a cabin with sea views at Project Ö.

Check sky conditions here: Ilmatieteen laitos aurora & night sky forecasts


Northern lights.

Northern Lights

When: If there is activity, visibility is best in the darkest months from October to February.

Where: Even though very rare in Southern Finland, northern lights can sometimes be seen from high lookout spots on clear nights.

How: Track activity at Ilmatieteen laitos aurora forecast.

Mythology: In Finnish folklore, revontulet (fox fires) were created when a magical fox ran across the snow, sending sparks into the sky with its tail.


A sunset in Saaristo.

Sunsets


When: Late July to September (best views during calm evenings)

Where: West-facing shores, open cliffs, sea-view saunas, harbors

How: Arrive before 9 PM, bring a seat or towel and some snacks or drinks!

Note: After midsummer, the sun starts dipping below the horizon again, creating long golden evenings and colourful skies reflected in the sea.

→ Combine with: Evening sauna, outdoor dinner, or shoreline walk