Updated 12 September 2026
Porcini in Hauts-de-Seine, France: live forecast and 14-day outlook
Mushroom season in Hauts-de-Seine, France is running strong right now, with porcini sitting at 75% today. The typical season runs August to November, and we’re in September now
Fruits after warm, humid spells when soil temperatures sit in the mid teens Celsius and a good soaking rain follows a warm period. A typical trigger is heavy rain after several warm days, with flushes appearing roughly one to two weeks later.
Late summer into autumn, roughly August to November in Britain and Ireland.
Check around the bases of host trees and along sunlit forest edges, returning to productive spots a few days apart through the flush. Cut or twist the stem cleanly, slice each cap to check for maggots, and take only young specimens with white firm flesh.
Can be confused with the bitter bolete (Tylopilus felleus), which has a darker net on the stem, pinkish pores when mature and a strongly bitter taste, and with red pored boletes. Avoid any bolete with red or orange pores or flesh that stains strongly blue.
Hauts-de-Seine wraps around the western edge of Paris, a small, densely built département shaped by the looping meanders of the Seine. Its land is gently undulating: a low alluvial valley floor near 30m rises to wooded plateaus and buttes around Meudon and Ville-d’Avray, close to 180m. Despite the urban sprawl, wooded plateaus survive as the Forêt de Meudon, Forêt de Fausses-Reposes and Bois de Clamart, capped by acidic Fontainebleau sands and clay-with-flints. Sessile oak, sweet chestnut, hornbeam and birch dominate, and the warm, acid, leaf-littered soil makes classic ground for boletes and chanterelles.
The climate is temperate oceanic, softened further by the surrounding city: mild winters, warm humid summers and modest rainfall of around 600-650mm spread evenly through the year. Autumn is the reliable flush, when September and October rains meet soil still warm from summer; damp springs can bring morels. Foraging here is peri-urban and pressured, worked in the leafy folds of Meudon, Clamart and Fausses-Reposes rather than deep wildwood. Under oak and chestnut come ceps, bay boletes, girolles, russulas and amanitas, with parasols and blewits on grassy edges; pick knowingly, for Paris is close.
FAQ
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 porcini are likely to be fruiting in Hauts-de-Seine, France. 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 porcini forecast for Hauts-de-Seine, France work?
We take the usual porcini season for Hauts-de-Seine, France (August to November) and weigh it against the weather right now and over the last few days. That gives you one live number, today 75% and running strong, plus a 14-day outlook and a normal-year line to compare against.
When is porcini season in Hauts-de-Seine, France?
In Hauts-de-Seine, France, porcini 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 Hauts-de-Seine, France reads 75% and conditions are running strong.
Where do porcini grow in Hauts-de-Seine, France?
Grows in mycorrhizal partnership with trees, especially under pine, spruce, birch, beech and oak, on well drained soil. Found in conifer and broadleaf woodland and along woodland edges and tracks. 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 Hauts-de-Seine, France so you know when it is worth heading out.
How do I know porcini season has started in Hauts-de-Seine, France?
Season usually kicks off after a warm spell followed by steady rain, with the first flushes appearing somewhere in the August to November window. The clearest sign is the live forecast lifting off zero into ‘just starting’ or ‘building’. For Hauts-de-Seine, France it currently sits at 75% and is running strong.
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.