Øyeren Lake

Freshwater lake east of Oslo, Norway

A shallow lake at the Glomma delta east of Oslo, Øyeren supports extensive reedbeds and birdlife; visitors come for birdwatching, fishing, boating and cycling along shore paths.

Main image
Main image

Øyeren at a Glance#

Address: Øyeren (Lake Øyeren), Akershus, Norway - access points in surrounding municipalities (e.g., Lillestrøm, Rælingen)

About Øyeren#

Øyeren is a freshwater lake in southeastern Norway, located within the former Akershus region (now part of Viken county). It forms part of the lower Glomma river system and is a notable inland water body in the Oslofjord hinterland.

The lake’s shoreline and shallow areas provide habitat valued for waterfowl and wetland species, and parts of the lake and its surroundings are managed for nature conservation and flood regulation. Recreational use includes boating and birdwatching where access is available.

Øyeren lies east of Oslo in the broad lowland region northeast of the capital and is connected to regional road networks; the lake occupies a low-lying basin formed by the Glomma river’s course.

  • Hydrology and role: The lake is fed and drained by the Glomma, Norway’s longest river, and functions as part of the river’s lowland widening east of Oslo.

How to Get to Øyeren#

Øyeren is east of Oslo and accessible from the E6 highway. The nearest larger towns include Lillestrøm and Rælingen; local roads and signage guide visitors to public access points and marinas. Trains and buses serve nearby towns, then local taxis or bicycles provide final access.

Tips for Visiting Øyeren#

  • Birdwatchers should visit in spring during migration; the lake supports waterfowl and reed-nesting species.
  • Drive via the E6 and take local roads toward Lake Øyeren; watch for small signage to public access points.
  • If swimming, stick to designated spots - water quality varies seasonally and currents near river deltas can be strong.

Best Time to Visit Øyeren#

Summer for recreation; spring and autumn for birdwatching and quieter scenery.

Summer
June-August · 12-22°C
Warmest time for boating and lakeside picnics; long daylight hours make visits easy.
Spring/Autumn migration
April-May, September-October · 5-15°C
Peak bird migration; good for birdwatching on the lake's shoals and reed beds.

Weather & Climate near Øyeren#

Climate

Øyeren's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in February). Temperatures range from -7°C to 21°C. Moderate rainfall (770 mm/year).

Air Quality: AQI 21 Good
Best Time to Visit
JuneJulyMay
Temperature & Rainfall
Temperature Range
32°
Warmest Month
-31°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor -7° - -1° -8° 53 mm overcast 98% 2.5 m/s 0.0 low 6.7h
February Poor -7° - -1° -8° 37 mm overcast 98% 2.5 m/s 0.1 low 9.0h
March Poor -4° - 3° -4° 49 mm overcast 92% 2.6 m/s 0.3 low 11.6h
April Acceptable 0° - 8° 1° 42 mm partly cloudy 83% 2.6 m/s 0.6 moderate 14.3h
May Good 5° - 15° 9° 49 mm partly cloudy 80% 2.7 m/s 1.0 high 16.8h
June Good 9° - 19° 14° 73 mm partly cloudy 79% 2.7 m/s 1.4 high 18.2h
July Good 11° - 21° 16° 74 mm overcast 82% 2.5 m/s 1.3 high 17.5h
August Good 10° - 19° 15° 78 mm overcast 85% 2.4 m/s 0.9 moderate 15.3h
September Acceptable 7° - 14° 10° 83 mm overcast 88% 2.6 m/s 0.5 low 12.6h
October Poor 3° - 9° 4° 91 mm overcast 94% 2.5 m/s 0.1 low 10.0h
November Poor -2° - 3° -2° 82 mm overcast 97% 2.5 m/s 0.0 low 7.4h
December Poor -5° - 0° -6° 59 mm overcast 97% 2.4 m/s 0.0 low 5.9h