Updated 11 September 2026
Slippery Jack in Scottish Borders, Scotland: live forecast and 14-day outlook
Mushroom season in Scottish Borders, Scotland is building right now, with slippery jack sitting at 34% today. The typical season runs August to November, and we’re in September now
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.
Late summer through autumn, roughly August to November.
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.
The Scottish Borders is a country of rolling hills and broad river valleys, from the rounded Cheviot, Lammermuir and Moorfoot uplands down to the fertile haughs of the River Tweed and its tributaries. A short, dramatic North Sea coastline around Eyemouth and St Abb’s Head gives way inland to a patchwork of sheep moor, pasture and farmland. Conifer plantations of Sitka spruce and pine cloak much of the higher ground, while mixed and broadleaf woods of oak, beech, birch and hazel line the Tweed valley and the old estate policies. Look for fungi along the leaf-littered riverbanks, in the shelter of plantation edges and among the grassy clearings and old pasture.
Sheltered by the uplands to the west, the Borders are somewhat drier than much of western Scotland, but the climate is still cool, moist and changeable, with damp autumns that keep the woodland floor reliably humid. Mild, wet spells through September and October set up the main flush. Autumn is the prime season here, with chanterelles and ceps under the conifers and birches, and the unimproved grasslands and old pastures producing colourful waxcaps. Much of the land is sheep farm and forestry, so foragers should stick to access land and tracks and respect Scotland’s right of responsible access.
FAQ
Are slippery jack out near me right now in Scottish Borders, Scotland?
Today the slippery jack forecast for Scottish Borders, Scotland is 34% and conditions are building. That is a live read for the region this September, and it shifts with the weather rather than following a fixed calendar. It tells you if it is worth heading out in Scottish Borders, Scotland right now.
What should I look for this week for slippery jack in Scottish Borders, Scotland?
This week in Scottish Borders, Scotland the forecast is 34% 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 on the page shows whether conditions are climbing toward a flush or easing off, so you can pick your day.
Is it mushroom season in Scottish Borders, Scotland right now?
For slippery jack in Scottish Borders, Scotland, the typical season is August to November, and today the live forecast reads 34% with conditions building 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 Scottish Borders, Scotland. 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 Scottish Borders, Scotland work?
We take the usual slippery jack season for Scottish Borders, Scotland (August to November) and weigh it against the weather right now and over the last few days. That gives you one live number, today 34% and building, plus a 14-day outlook and a normal-year line to compare against.
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.