Swimmers diving into the Oslofjord from the wooden Sørenga harbour-bath deck, the Bjørvika skyline beyond on a summer evening.
Photo by Eirik Skarstein / Unsplash
NorwayNorway · Eastern Norway

Oslo

Fjord capital with islands you swim off — though Oslo itself catches the odd heatwave.

At the seaOSL
7-day weather window · 7-night trip
Too cold

Below our comfortable coolcation range. Pack for cold weather.

9°Day
4°Night
5.7hSun/day
13°
T
12°
F
8°
S
9°
S
8°
M
8°
T
6°
W
5°
T
4°
F
2°
S
3°
S
3°
M
3°
T
3°
W
SunRainCloudSolid: days 1–5 · faded: 6–10 · hatched: 11–14, a rough guess

Forecast updated 29 Oct, 04:25 UTC. Best 7-night window: 29 Oct – 5 Nov. Rated on comfort alone: daytime highs in the 12–22°C band, steady and dry score best.

Days 1–5 are usually reliable, 6–10 drift, 11–14 are the model guessing. Check again the day before you fly — more on what this can and can't do.

When to go

From our 2026 climate study, not the live forecast.
RecommendedThis month

Usually 22–24°C in summer with the Oslofjord islands (Hovedøya, Langøyene) a public-ferry ride from City Hall. The honest caveat on this list: inland-ish Oslo can hit 30°C+ in a real heat dome (2018 was brutal) — it is the warmest of the Norwegian cities here, not a guaranteed refuge.

Common questions about Oslo

When is the best time to visit Oslo?

May–September is when we'd go. The live forecast on this page shows what the next two weeks look like.

Is Oslo worth visiting in May?

Yes. May sits inside the best stretch (May–September). Once your dates fall within the next two weeks, the forecast above gives you the real picture.

Is Oslo good in October?

October sits between the windows in Oslo. Good weather happens; the odds are simply better in May–September. For dates inside the next two weeks, trust the forecast above over any season rule.