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Fotograf: Dieter Wirz CC BY-SA 4.0 Wikimedia Commons

Frösön

Island

Frösön sits in Lake Storsjön by Östersund and carries a runestone and regional cultural sites. Visitors come for summer festivals, lakeside walks and museums linked to local history and composer Wilhelm Peterson-Berger.

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In this guide

Frösön essentials

Address: Frösön, Jämtland County, Sweden (island in Lake Storsjön near Östersund)

About Frösön

Frösön is the principal island in Sweden’s Lake Storsjön, located in Jämtland County immediately adjacent to the city of Östersund. It is the site of the island’s principal historical monuments and is integrated with the local urban area by road.

Visitors find a compact island with a hilltop medieval church and open views across Storsjön, along with cultural and archaeological points of interest tied to the region’s Viking-Age and medieval past. The island’s landscape includes low woodland, shorelines used for recreation and built-up residential areas.

The island has been inhabited since the Viking Age and contains visible evidence from that period, including a notable runestone. Over time the island grew into a modern residential and cultural part of Östersund while retaining its historic sites.

Frösön sits in Lake Storsjön immediately west of central Östersund in Jämtland; it is connected to the mainland by road and is within the municipality of Östersund.

  • Access: The island is the largest island in Lake Storsjön and is effectively contiguous with the town of Östersund by road connections.

What to See#

  • Frösö Church: A medieval stone church located on the island, with visible Romanesque features and a prominent hilltop position overlooking the lake.
  • Frösöstenen (runestone): An inscribed runestone dating to the early 11th century that stands on the island and is associated with the region’s Viking-Age heritage.
When to Go

Best Time to Visit Frösön

Summer offers the best access and local events; winter provides snowscape solitude for experienced travelers.

Summer
June-August · 10-22°C
Warmest time with long daylight and local festivals.
Winter
December-March · -15-0°C
Snow sports in the region; island is quiet and often snowbound.

Weather & Climate near Frösön

Climate

Frösön's climate is classified as Subarctic - Subarctic climate with cool summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -11°C to 18°C. Moderate rainfall (517 mm/year).

Air Quality: AQI 14 Good
Best Time to Visit
JuneAugustJuly
Temperature & Rainfall
Temperature Range
29°
Warmest Month
-33°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor -11° - -4° -12° 29 mm overcast 99% 2.5 m/s 0.0 low 5.4h
February Poor -10° - -3° -11° 22 mm overcast 98% 2.4 m/s 0.0 low 8.4h
March Poor -6° - 1° -7° 22 mm overcast 96% 2.7 m/s 0.2 low 11.5h
April Poor -3° - 5° -2° 30 mm overcast 86% 2.7 m/s 0.5 moderate 14.7h
May Acceptable 3° - 12° 6° 36 mm overcast 81% 2.8 m/s 0.9 moderate 17.8h
June Good 7° - 17° 12° 64 mm overcast 79% 2.8 m/s 1.2 high 19.8h
July Good 10° - 19° 14° 83 mm overcast 82% 2.5 m/s 1.2 high 18.8h
August Good 9° - 17° 13° 61 mm overcast 86% 2.4 m/s 0.8 moderate 15.9h
September Acceptable 5° - 11° 6° 57 mm overcast 89% 2.7 m/s 0.3 low 12.8h
October Poor 1° - 6° 1° 43 mm overcast 94% 2.7 m/s 0.1 low 9.6h
November Poor -4° - 1° -5° 37 mm overcast 98% 2.6 m/s 0.0 low 6.4h
December Poor -8° - -2° -9° 33 mm overcast 99% 2.5 m/s 0.0 low 4.2h
Getting There & Around

How to Get to Frösön

Frösön is connected to Östersund by road (Frösöbron bridge). Östersund is reachable by train and bus services from major Swedish cities; Frösön is a short drive from Östersund centre.

Tips for Visiting Frösön

  • Walk or cycle the small island to take in the church and old fishing hamlets; there are no major tourist facilities
  • Visit during the Frösö Run (if scheduled) or local events for a taste of island community life
  • Combine a visit with a drive along the Storsjöbygden to see medieval rune stones and lakeside views