Is It Slippery Jack Season in Valais Right Now?
🇨🇭 Valais, SwitzerlandLive forecast

Slippery Jack forecast for Valais, Switzerland

23%
Updated: 15 October 2026

Slippery Jack: building.

Valais
Temperature, 14 days
11°C

Average 8°, from 4° to 12°

3 Oct16 Oct
Rain, 14 days
21mm

Rainy days: 4. Wettest: 8 Oct

3 Oct16 Oct
Trees for Slippery Jack
758woods
Larch80%
Pine20%

Share of wood area by the tree slippery jack grows with in Valais

Height of the woods
1,115–2,010m

where most of them lie

2,000–2,200 m
11%
1,800–2,000 m
29%
1,600–1,800 m
27%
1,400–1,600 m
13%
1,200–1,400 m
8%
800–1,000 m
5%

Are Slippery Jack out in Valais yet?

The best time for slippery jack in Switzerland is August to November, with the peak normally in the middle of that range. Today they’re at 23% and building in Valais

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.

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.

Strictly associated with pines, so look in conifer plantations and natural pine woods, often on sandy or poor acidic soil. It favours forest edges, paths, grassy verges and young plantations rather than deep shade.

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.

A decent edible with a mild flavour, good in mixed dishes, soups and sauces rather than as the star. Always peel off the slimy cap skin, which can otherwise cause loose stools, and discard the spongy pore layer on older specimens.

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.

FAQ

Where do slippery jack grow in Valais, Switzerland?

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 Valais, Switzerland so you know when it is worth heading out.

How do I know slippery jack season has started in Valais, Switzerland?

The start moves from year to year with the weather, and the first flushes usually appear somewhere in the August to November window. The clearest sign is the live forecast lifting off zero into ‘just starting’ or ‘building‘. For Valais, Switzerland it currently sits at 23% and is building.

Are slippery jack out near me right now in Valais, Switzerland?

Today the slippery jack forecast for Valais, Switzerland is 23% and conditions are building. That is a live read for the region this October, and it shifts with the weather rather than following a fixed calendar. It tells you if it is worth heading out in Valais, Switzerland right now.

What should I look for this week for slippery jack in Valais, Switzerland?

This week in Valais, Switzerland the forecast is 23% and building. 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. The 14-day outlook in the app shows whether conditions are climbing toward a flush or easing off, so you can pick your day.

Is it mushroom season in Valais, Switzerland right now?

For slippery jack in Valais, Switzerland, the typical season is August to November, and today the live forecast reads 23% with conditions building this October. 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 Valais, Switzerland. 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 Valais, Switzerland work?

Every mushroom has its own machine-learning models, trained on years of mushroom records and calibrated for each region. Every day they read the weather of the last three weeks in Valais, Switzerland: temperature, rain, humidity, soil temperature and moisture. Together with the time of year and the kind of woods and soil there, that gives the chance of slippery jack fruiting today. Right now it is 23% and building. The full 14-day outlook is in the app.

When is slippery jack season in Valais, Switzerland?

In Valais, Switzerland, 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 (October) the live forecast for Valais, Switzerland reads 23% and conditions are building.

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.

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