FungRadar

Foraging forecast: Cornwall

Yes — conditions in Cornwall in September 2026 are good, index 61 out of 100, with penny bun furthest along. That is a reading of weather, woodland and season: it does not promise you a full basket, but this is one of the weeks worth going out.

A seven-day index for the species whose records are confirmed here — 26 of them right now. Flush phases and the factors behind the number, instead of a "chance of finding" percentage we cannot measure. Data updated 18 September 2026, 11:37 BST.

The map is built from the measurement network — one point per sizeable town and more in between. A detailed 2.5 km grid is computed for one region so far: it needs its own run for every cell.

Biting insects: mosquitoes — noticeable. What to bring.

Best today

Penny Bun

Boletus edulis

Buildingconfidence 49%

Flush phase

  1. Quiet
  2. Starting
  3. Building
  4. Peak
  5. Fading

Updated 18 September 2026, 11:37 BST

Map

Where to look: Cornwall

Values are computed at measurement points and interpolated between them. Clicking a point opens that town.

Open the interactive map

By species

The week, species by species

Each row is its own seven days. Today is outlined.

Penny Bun — botanical illustration

Penny Bun

Boletus edulis

Building61 today

Week's best 61 — on Fridayaverage 56by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today6118 Sept
  2. Sat6119 Sept
  3. Sun6120 Sept
  4. Mon5921 Sept
  5. Tue5122 Sept
  6. Wed5123 Sept
  7. Thu5124 Sept
Honey Fungus — botanical illustration

Honey Fungus

Armillaria mellea

Building50 today

Week's best 52 — on Sundayaverage 50by the weekend steady

Conditions are best on Sunday.

  1. Today5018 Sept
  2. Sat5119 Sept
  3. Sun5220 Sept
  4. Mon5221 Sept
  5. Tue4822 Sept
  6. Wed4823 Sept
  7. Thu4724 Sept
Weeping Bolete — botanical illustration

Weeping Bolete

Suillus granulatus

Building55 today

Week's best 57 — on Sundayaverage 54by the weekend steady

Conditions are best on Sunday.

  1. Today5518 Sept
  2. Sat5619 Sept
  3. Sun5720 Sept
  4. Mon5621 Sept
  5. Tue5322 Sept
  6. Wed5223 Sept
  7. Thu5124 Sept
Oyster Mushroom — botanical illustration

Oyster Mushroom

Pleurotus ostreatus

Quiet0 today

Week's best 0average 0by the weekend steady

Conditions stay poor all week — not worth the trip yet.

  1. Today018 Sept
  2. Sat019 Sept
  3. Sun020 Sept
  4. Mon021 Sept
  5. Tue022 Sept
  6. Wed023 Sept
  7. Thu024 Sept
Velvet Shank — botanical illustration

Velvet Shank

Flammulina velutipes

Quiet0 today

Week's best 0average 0by the weekend steady

Conditions stay poor all week — not worth the trip yet.

  1. Today018 Sept
  2. Sat019 Sept
  3. Sun020 Sept
  4. Mon021 Sept
  5. Tue022 Sept
  6. Wed023 Sept
  7. Thu024 Sept
Brown Birch Bolete — botanical illustration

Brown Birch Bolete

Leccinum scabrum

Building55 today

Week's best 55 — on Fridayaverage 52by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5518 Sept
  2. Sat5519 Sept
  3. Sun5520 Sept
  4. Mon5421 Sept
  5. Tue4922 Sept
  6. Wed4823 Sept
  7. Thu4724 Sept
Orange Oak Bolete — botanical illustration

Orange Oak Bolete

Leccinum aurantiacum

Building56 today

Week's best 56 — on Fridayaverage 52by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5618 Sept
  2. Sat5619 Sept
  3. Sun5620 Sept
  4. Mon5521 Sept
  5. Tue4822 Sept
  6. Wed4823 Sept
  7. Thu4724 Sept
Chanterelle — botanical illustration

Chanterelle

Cantharellus cibarius

Building50 today

Week's best 50 — on Fridayaverage 47by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5018 Sept
  2. Sat5019 Sept
  3. Sun4920 Sept
  4. Mon4821 Sept
  5. Tue4522 Sept
  6. Wed4523 Sept
  7. Thu4424 Sept
Lactarius resimus — botanical illustration

Lactarius resimus

Lactarius resimus

Building51 today

Week's best 51 — on Fridayaverage 47by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5118 Sept
  2. Sat5119 Sept
  3. Sun5120 Sept
  4. Mon4921 Sept
  5. Tue4222 Sept
  6. Wed4223 Sept
  7. Thu4224 Sept
Saffron Milkcap — botanical illustration

Saffron Milkcap

Lactarius deliciosus

Building56 today

Week's best 57 — on Sundayaverage 54by the weekend falling

Conditions are best on Sunday.

  1. Today5618 Sept
  2. Sat5619 Sept
  3. Sun5720 Sept
  4. Mon5721 Sept
  5. Tue5122 Sept
  6. Wed5023 Sept
  7. Thu5024 Sept
Bay Bolete — botanical illustration

Bay Bolete

Imleria badia

Building60 today

Week's best 60 — on Fridayaverage 55by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today6018 Sept
  2. Sat6019 Sept
  3. Sun6020 Sept
  4. Mon5821 Sept
  5. Tue5022 Sept
  6. Wed5023 Sept
  7. Thu5024 Sept
Sheathed Woodtuft — botanical illustration

Sheathed Woodtuft

Kuehneromyces mutabilis

Starting44 today

Week's best 45 — on Saturdayaverage 43by the weekend falling

Conditions are poor: even the week's best day only reaches «slow».

  1. Today4418 Sept
  2. Sat4519 Sept
  3. Sun4520 Sept
  4. Mon4521 Sept
  5. Tue4122 Sept
  6. Wed4023 Sept
  7. Thu3824 Sept
Field Blewit — botanical illustration

Field Blewit

Collybia personata

Starting33 today

Week's best 36average 34by the weekend steady

Conditions stay poor all week — not worth the trip yet.

  1. Today3318 Sept
  2. Sat3419 Sept
  3. Sun3520 Sept
  4. Mon3621 Sept
  5. Tue3422 Sept
  6. Wed3323 Sept
  7. Thu3224 Sept
Wood Blewit — botanical illustration

Wood Blewit

Collybia nuda

Starting41 today

Week's best 45 — on Mondayaverage 42by the weekend steady

Conditions are poor: even the week's best day only reaches «slow».

  1. Today4118 Sept
  2. Sat4219 Sept
  3. Sun4420 Sept
  4. Mon4521 Sept
  5. Tue4222 Sept
  6. Wed4123 Sept
  7. Thu4024 Sept
Field Mushroom — botanical illustration

Field Mushroom

Agaricus campestris

Starting47 today

Week's best 48 — on Saturdayaverage 46by the weekend falling

Conditions are poor: even the week's best day only reaches «slow».

  1. Today4718 Sept
  2. Sat4819 Sept
  3. Sun4820 Sept
  4. Mon4821 Sept
  5. Tue4622 Sept
  6. Wed4523 Sept
  7. Thu4224 Sept
Fairy Ring Champignon — botanical illustration

Fairy Ring Champignon

Marasmius oreades

Starting43 today

Week's best 44 — on Saturdayaverage 42by the weekend falling

Conditions are poor: even the week's best day only reaches «slow».

  1. Today4318 Sept
  2. Sat4419 Sept
  3. Sun4420 Sept
  4. Mon4421 Sept
  5. Tue4222 Sept
  6. Wed4123 Sept
  7. Thu3824 Sept
Parasol — botanical illustration

Parasol

Macrolepiota procera

Building53 today

Week's best 54 — on Sundayaverage 50by the weekend falling

Conditions are best on Sunday.

  1. Today5318 Sept
  2. Sat5319 Sept
  3. Sun5420 Sept
  4. Mon5221 Sept
  5. Tue4822 Sept
  6. Wed4723 Sept
  7. Thu4524 Sept
Common Puffball — botanical illustration

Common Puffball

Lycoperdon perlatum

Starting44 today

Week's best 44 — on Fridayaverage 42by the weekend falling

Conditions are poor: even the week's best day only reaches «slow».

  1. Today4418 Sept
  2. Sat4419 Sept
  3. Sun4420 Sept
  4. Mon4421 Sept
  5. Tue4222 Sept
  6. Wed4123 Sept
  7. Thu3824 Sept
Red Cracking Bolete — botanical illustration

Red Cracking Bolete

Xerocomellus chrysenteron

Building52 today

Week's best 52 — on Fridayaverage 49by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5218 Sept
  2. Sat5219 Sept
  3. Sun5220 Sept
  4. Mon5121 Sept
  5. Tue4522 Sept
  6. Wed4423 Sept
  7. Thu4424 Sept
Bovine Bolete — botanical illustration

Bovine Bolete

Suillus bovinus

Starting49 today

Week's best 49 — on Fridayaverage 46by the weekend falling

Conditions are poor: even the week's best day only reaches «slow».

  1. Today4918 Sept
  2. Sat4919 Sept
  3. Sun4920 Sept
  4. Mon4821 Sept
  5. Tue4222 Sept
  6. Wed4223 Sept
  7. Thu4124 Sept
Milk White Brittlegill — botanical illustration

Milk White Brittlegill

Russula delica

Building53 today

Week's best 53 — on Fridayaverage 49by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5318 Sept
  2. Sat5319 Sept
  3. Sun5320 Sept
  4. Mon5121 Sept
  5. Tue4422 Sept
  6. Wed4423 Sept
  7. Thu4424 Sept
Black Morel — botanical illustration

Black Morel

Morchella elata

Quiet0 today

Week's best 0average 0by the weekend steady

Conditions stay poor all week — not worth the trip yet.

  1. Today018 Sept
  2. Sat019 Sept
  3. Sun020 Sept
  4. Mon021 Sept
  5. Tue022 Sept
  6. Wed023 Sept
  7. Thu024 Sept
Fly Agaric — botanical illustration

Fly Agaric

Amanita muscaria

Building59 today

Week's best 60 — on Sundayaverage 56by the weekend falling

Conditions are best on Sunday.

  1. Today5918 Sept
  2. Sat5919 Sept
  3. Sun6020 Sept
  4. Mon5921 Sept
  5. Tue5322 Sept
  6. Wed5223 Sept
  7. Thu5124 Sept
Panthercap — botanical illustration

Panthercap

Amanita pantherina

Building56 today

Week's best 56 — on Fridayaverage 52by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5618 Sept
  2. Sat5619 Sept
  3. Sun5520 Sept
  4. Mon5421 Sept
  5. Tue4822 Sept
  6. Wed4723 Sept
  7. Thu4624 Sept

Orange Birch Bolete

Leccinum versipelle

Building56 today

Week's best 56 — on Fridayaverage 52by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5618 Sept
  2. Sat5619 Sept
  3. Sun5620 Sept
  4. Mon5521 Sept
  5. Tue4822 Sept
  6. Wed4823 Sept
  7. Thu4724 Sept

Stinking Brittlegill

Russula foetens

Building54 today

Week's best 54 — on Fridayaverage 50by the weekend falling

Today is as good as it gets — conditions do not improve later this week.

  1. Today5418 Sept
  2. Sat5419 Sept
  3. Sun5420 Sept
  4. Mon5321 Sept
  5. Tue4722 Sept
  6. Wed4623 Sept
  7. Thu4524 Sept

Numbers are taken at the measurement point nearest the centre of the region — a real calculation at one place, not an average over the whole area. A town an hour away will read differently, and its own page says so.

Been out in Cornwall? Tell us how it went

No sign-up, five seconds. Reports are visible to everyone and help us check the forecast — where people say “nothing out there” and the model promises a flush, the model is wrong.

How much did you find?
When were you out?

This form does not ask for coordinates. What gets published is the name, the rating and the text — nothing else.

Common questions

Are there mushrooms in Cornwall in September 2026?

Yes — conditions in Cornwall in September 2026 are good, index 61 out of 100, with penny bun furthest along. That is a reading of weather, woodland and season: it does not promise you a full basket, but this is one of the weeks worth going out.

Which mushrooms are out in Cornwall right now?

The species list for this region is built from confirmed records in GBIF. As soon as there are enough of them, the species appear here with their own forecast — we do not add a species to a region on a guess.

How is the index calculated?

An index from 0 to 100, built from the last month of weather, satellite woodland data, terrain and the seasonal window of each species. It is not a probability of finding anything: it is how well conditions match what that species needs.

When is the best day to go in Cornwall?

Use the seven-day index on this page: pick the day with the higher number, and watch the flush phase — «Building» and «Peak» are the ones worth the drive. Today reads 61 out of 100.

The index is high but I found nothing — why?

The index reads weather and season — things that are the same for tens of kilometres around. It does not know your particular wood, and that is where the mushroom grows. The usual reasons: wrong trees — every species has its own, and no weather makes up for the wrong stand; the wood was felled recently or is young — the mycelium takes years to recover; the spot is picked out — everything near a road or a car park goes over a weekend; the flush has been taken — you came a day after those who came on time; or the flush passed and slugs and larvae got there first, which the model cannot see. The reverse holds too: a low index does not mean an empty wood. It means the conditions are against you, not that there is nothing there.

How the index is calculated, and what the model cannot promise — on the about page.