Updated 11 September 2026
Is it Slippery Jack season in Stockholm right now?
This week’s slippery jack forecast for Stockholm, Sweden reads 67% and looking good. The 14-day outlook decides whether to go now or wait, so check https://shroomcast.net/forecast/slippery-jack-forecast-for-stockholm-sweden/ before you set out
It fruits after warm late-summer and autumn rain, typically when day temperatures sit around 10 to 20C and the ground stays damp. A good soaking followed by mild nights usually brings flushes within a week or two.
Cap is chestnut to dark brown, smooth and very slimy when wet. The underside has fine pale yellow pores rather than gills, and the stem carries a distinct ring with small brown dots above it. The flesh is pale and the smell is mild.
Always peel off the slimy cap skin and remove the spongy pore layer first, as both can upset the stomach. Slice and fry in butter for a soft side dish, add to risotto or stews where the texture suits, or dry the cleaned pieces and grind into a savoury mushroom powder for stocks and sauces.
Other Suillus boletes such as the larch bolete (Suillus grevillei) and weeping bolete, all of which are also edible, so there are no dangerous poisonous lookalikes. The slimy brown cap, yellow pores and ringed stem set it apart from any toxic gilled mushroom.
Stockholm sits where Lake Mälaren spills into the Baltic, a low, glacier-worn landscape of rocky islands, inlets and shallow bays that fan out into the vast archipelago. Inland the terrain is gently rolling, with smooth granite outcrops, scattered lakes and bands of forest threaded between fields and suburbs. The woods are typically Nordic: Scots pine on the dry rocky ridges, Norway spruce in the damper, mossier hollows, and birch, oak and aspen mixed in. Spruce stands and mossy ground are the place to look for chanterelles and porcini, while the oaks and birches host a wide range of boletes and other edibles.
The climate is humid and fairly cool, tempered by the surrounding sea, with no real summer drought and steady rainfall from late summer into autumn. Warm, wet August and September weather after the first cooler nights is what reliably triggers the main flush. Foraging is woven into local life here, with public forest freely open under allemansrätten (the right of public access). Chanterelles, porcini and funnel chanterelles are the classic prizes, and you rarely have to drive far from the city to reach productive woodland or take a boat out to the islands.
FAQ
Is it mushroom season in Stockholm, Sweden right now?
For slippery jack in Stockholm, Sweden, the typical season is August to November, and today the live forecast reads 67% with conditions looking good this September. So yes or no depends on the day and the weather, which is exactly what the forecast tracks.
Does ShroomCast tell me if a mushroom is safe to eat or identify it for me?
No. ShroomCast only forecasts timing, so it tells you when slippery jack are likely to be fruiting in Stockholm, Sweden. It does not identify mushrooms, and it cannot tell you whether anything you pick is safe to eat. Always confirm your own identification from a reliable source before eating anything.
How does the live slippery jack forecast for Stockholm, Sweden work?
We take the usual slippery jack season for Stockholm, Sweden (August to November) and weigh it against the weather right now and over the last few days. That gives you one live number, today 67% and looking good, plus a 14-day outlook and a normal-year line to compare against.
When is slippery jack season in Stockholm, Sweden?
In Stockholm, Sweden, slippery jack season usually runs August to November. The exact start shifts year to year with rain and temperature, so some years they show up early and some years late. Right now (September) the live forecast for Stockholm, Sweden reads 67% and conditions are looking good.
Where do slippery jack grow in Stockholm, Sweden?
Grows in conifer woods, almost always with pine, on sandy or poor soil and often along forest tracks and clearings. Common in young plantations and appears in groups. They tend to come back to the same kinds of ground year after year, so once you find good cover it is worth checking again. ShroomCast does not share exact spots; it tells you the timing for Stockholm, Sweden so you know when it is worth heading out.
See the live regional forecast in the ShroomCast app.
This page shows today. The app gives you the full 14-day outlook for your area and all 14 species, so you can pick the right day before you drive out.
Scale: 0-20% very low · 20-40% low · 40-60% moderate · 60-80% high · 80-100% excellent. ShroomCast forecasts fruiting probability from weather, soil, forests and years of observations – a guide, not a guarantee of finds.
ShroomCast forecasts the region and the time of year. It cannot identify mushrooms for you, so confirm any species with a reliable source before eating it.