When Will Slippery Jack Appear in County Cork? August to November Outlook
🇮🇪 County Cork, IrelandLive forecast

Slippery Jack forecast for County Cork, Ireland

22%
Updated: 15 October 2026

Slippery Jack: building.

County Cork
Temperature, 14 days
11°C

Average 13°, from 10° to 16°

3 Oct16 Oct
Rain, 14 days
31mm

Rainy days: 6. Wettest: 11 Oct

3 Oct16 Oct
Trees for Slippery Jack
1,075woods
Pine97%
Larch3%

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

Height of the woods
45–295m

where most of them lie

200–400 m
33%
0–200 m
65%

Is it Slippery Jack season in County Cork right now?

This week’s slippery jack forecast for County Cork, Ireland reads 22% and building.

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.

It has a distinct membranous ring or partial veil remnant on the stem, an unusual feature among the slippery-capped Suillus boletes.

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.

County Cork is Ireland’s largest county, ranging from a deeply indented Atlantic coastline of long peninsulas like Beara, Sheep’s Head and Mizen Head to the rolling farmland of its fertile river valleys. Inland it rises into sandstone uplands such as the Shehy and Caha Mountains, with Knockboy the highest point at 706 m. Mixed deciduous woodland of oak, ash, birch and hazel survives in sheltered valleys and demesnes, alongside extensive Sitka spruce and pine plantations like those at Gougane Barra forest park. Damp leaf litter under broadleaves, mossy stream banks and the edges of conifer stands are the most productive ground for fungi.

Cork has a mild, humid oceanic climate softened by the Atlantic, with cool summers, frost-free coasts and heavy rainfall spread through much of the year. This near-constant moisture keeps woodland floors damp and gives a long autumn fruiting season. Expect a generous mushroom season from late summer well into November, with chanterelles and ceps in the older oak woods and waxcaps studding the unimproved coastal grasslands. Much of the land is farmed or fenced, so stick to forest parks, public woodland and recognised access points and always ask permission on private ground.

FAQ

How do I know slippery jack season has started in County Cork, Ireland?

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 County Cork, Ireland it currently sits at 22% and is building.

Are slippery jack out near me right now in County Cork, Ireland?

Today the slippery jack forecast for County Cork, Ireland is 22% 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 County Cork, Ireland right now.

What should I look for this week for slippery jack in County Cork, Ireland?

This week in County Cork, Ireland the forecast is 22% 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 County Cork, Ireland right now?

For slippery jack in County Cork, Ireland, the typical season is August to November, and today the live forecast reads 22% 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 County Cork, Ireland. 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 County Cork, Ireland 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 County Cork, Ireland: 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 22% and building. The full 14-day outlook is in the app.

When is slippery jack season in County Cork, Ireland?

In County Cork, Ireland, 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 County Cork, Ireland reads 22% and conditions are building.

Where do slippery jack grow in County Cork, Ireland?

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 County Cork, Ireland so you know when it is worth heading out.

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.

Related forecasts

Get the app

Open the region in the app for the 14 days ahead, the woods around you and an alert when it peaks. Free to start with 4 species.

Scan to install