FungRadar

Foraging forecast: Karlovacka

Yes — conditions in Karlovacka in September 2026 are good, index 68 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.

The region is even today: 68 to 69 across all 4 stations. There is no point picking a spot by the weather — the difference is noise. This is weather, not a catch: a higher number means better conditions, and the mushroom grows in one particular wood.

Biting insects: mosquitoes — noticeable. What to bring.

Best today

Penny Bun

Boletus edulis

Buildingconfidence 50%

Flush phase

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

Updated 18 September 2026, 11:37 BST

Map

Where to look: Karlovacka

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

Building68 today

Week's best 73 — on Sundayaverage 71by the weekend steady

Conditions are best on Sunday.

  1. Today6818 Sept
  2. Sat7019 Sept
  3. Sun7320 Sept
  4. Mon7321 Sept
  5. Tue7322 Sept
  6. Wed7223 Sept
  7. Thu6624 Sept
Honey Fungus — botanical illustration

Honey Fungus

Armillaria mellea

Building53 today

Week's best 64 — on Wednesdayaverage 59by the weekend rising

Conditions are best on Wednesday.

  1. Today5318 Sept
  2. Sat5519 Sept
  3. Sun5920 Sept
  4. Mon6021 Sept
  5. Tue6222 Sept
  6. Wed6423 Sept
  7. Thu6024 Sept
Weeping Bolete — botanical illustration

Weeping Bolete

Suillus granulatus

Building60 today

Week's best 71 — on Wednesdayaverage 66by the weekend steady

Conditions are best on Wednesday.

  1. Today6018 Sept
  2. Sat6219 Sept
  3. Sun6820 Sept
  4. Mon6921 Sept
  5. Tue7022 Sept
  6. Wed7123 Sept
  7. Thu6424 Sept
Oyster Mushroom — botanical illustration

Oyster Mushroom

Pleurotus ostreatus

Quiet0 today

Zero all week: this species is not fruiting now.

Velvet Shank — botanical illustration

Velvet Shank

Flammulina velutipes

Quiet0 today

Zero all week: this species is not fruiting now.

Brown Birch Bolete — botanical illustration

Brown Birch Bolete

Leccinum scabrum

Building60 today

Week's best 67 — on Tuesdayaverage 64by the weekend steady

Conditions are best on Tuesday.

  1. Today6018 Sept
  2. Sat6219 Sept
  3. Sun6620 Sept
  4. Mon6621 Sept
  5. Tue6722 Sept
  6. Wed6623 Sept
  7. Thu6024 Sept
Orange Oak Bolete — botanical illustration

Orange Oak Bolete

Leccinum aurantiacum

Building62 today

Week's best 68 — on Sundayaverage 65by the weekend steady

Conditions are best on Sunday.

  1. Today6218 Sept
  2. Sat6419 Sept
  3. Sun6820 Sept
  4. Mon6821 Sept
  5. Tue6822 Sept
  6. Wed6723 Sept
  7. Thu6124 Sept
Chanterelle — botanical illustration

Chanterelle

Cantharellus cibarius

Building54 today

Week's best 58 — on Tuesdayaverage 56by the weekend steady

Conditions are best on Tuesday.

  1. Today5418 Sept
  2. Sat5619 Sept
  3. Sun5720 Sept
  4. Mon5721 Sept
  5. Tue5822 Sept
  6. Wed5623 Sept
  7. Thu5324 Sept
Lactarius resimus — botanical illustration

Lactarius resimus

Lactarius resimus

Building56 today

Week's best 60average 58by the weekend steady

The week is flat — no day to pick, conditions are the same throughout.

  1. Today5618 Sept
  2. Sat5719 Sept
  3. Sun5820 Sept
  4. Mon5821 Sept
  5. Tue6022 Sept
  6. Wed6023 Sept
  7. Thu5724 Sept
Saffron Milkcap — botanical illustration

Saffron Milkcap

Lactarius deliciosus

Building61 today

Week's best 68 — on Wednesdayaverage 64by the weekend rising

Conditions are best on Wednesday.

  1. Today6118 Sept
  2. Sat6219 Sept
  3. Sun6420 Sept
  4. Mon6421 Sept
  5. Tue6622 Sept
  6. Wed6823 Sept
  7. Thu6624 Sept
Bay Bolete — botanical illustration

Bay Bolete

Imleria badia

Building67 today

Week's best 72 — on Sundayaverage 70by the weekend steady

Conditions are best on Sunday.

  1. Today6718 Sept
  2. Sat6919 Sept
  3. Sun7220 Sept
  4. Mon7221 Sept
  5. Tue7222 Sept
  6. Wed7223 Sept
  7. Thu6724 Sept
Sheathed Woodtuft — botanical illustration

Sheathed Woodtuft

Kuehneromyces mutabilis

Starting47 today

Week's best 56 — on Mondayaverage 52by the weekend steady

Conditions are best on Monday.

  1. Today4718 Sept
  2. Sat4919 Sept
  3. Sun5520 Sept
  4. Mon5621 Sept
  5. Tue5622 Sept
  6. Wed5523 Sept
  7. Thu4624 Sept
Field Blewit — botanical illustration

Field Blewit

Collybia personata

Starting38 today

Week's best 50 — on Wednesdayaverage 44by the weekend rising

Conditions are best on Wednesday.

  1. Today3818 Sept
  2. Sat4019 Sept
  3. Sun4520 Sept
  4. Mon4621 Sept
  5. Tue4822 Sept
  6. Wed5023 Sept
  7. Thu4424 Sept
Wood Blewit — botanical illustration

Wood Blewit

Collybia nuda

Starting44 today

Week's best 56 — on Wednesdayaverage 51by the weekend rising

Conditions are best on Wednesday.

  1. Today4418 Sept
  2. Sat4619 Sept
  3. Sun5120 Sept
  4. Mon5221 Sept
  5. Tue5422 Sept
  6. Wed5623 Sept
  7. Thu5224 Sept
Field Mushroom — botanical illustration

Field Mushroom

Agaricus campestris

Building50 today

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

Conditions are best on Monday.

  1. Today5018 Sept
  2. Sat5219 Sept
  3. Sun5620 Sept
  4. Mon5721 Sept
  5. Tue5722 Sept
  6. Wed5723 Sept
  7. Thu4724 Sept
Fairy Ring Champignon — botanical illustration

Fairy Ring Champignon

Marasmius oreades

Starting46 today

Week's best 54 — on Wednesdayaverage 50by the weekend steady

Conditions are best on Wednesday.

  1. Today4618 Sept
  2. Sat4819 Sept
  3. Sun5220 Sept
  4. Mon5221 Sept
  5. Tue5322 Sept
  6. Wed5423 Sept
  7. Thu4424 Sept
Parasol — botanical illustration

Parasol

Macrolepiota procera

Building58 today

Week's best 66 — on Mondayaverage 62by the weekend steady

Conditions are best on Monday.

  1. Today5818 Sept
  2. Sat5919 Sept
  3. Sun6520 Sept
  4. Mon6621 Sept
  5. Tue6622 Sept
  6. Wed6523 Sept
  7. Thu5624 Sept
Common Puffball — botanical illustration

Common Puffball

Lycoperdon perlatum

Starting46 today

Week's best 54 — on Tuesdayaverage 50by the weekend steady

Conditions are best on Tuesday.

  1. Today4618 Sept
  2. Sat4819 Sept
  3. Sun5220 Sept
  4. Mon5321 Sept
  5. Tue5422 Sept
  6. Wed5423 Sept
  7. Thu4424 Sept
Red Cracking Bolete — botanical illustration

Red Cracking Bolete

Xerocomellus chrysenteron

Building58 today

Week's best 64 — on Sundayaverage 62by the weekend steady

Conditions are best on Sunday.

  1. Today5818 Sept
  2. Sat6019 Sept
  3. Sun6420 Sept
  4. Mon6421 Sept
  5. Tue6422 Sept
  6. Wed6423 Sept
  7. Thu5824 Sept
Bovine Bolete — botanical illustration

Bovine Bolete

Suillus bovinus

Building55 today

Week's best 61 — on Tuesdayaverage 58by the weekend steady

Conditions are best on Tuesday.

  1. Today5518 Sept
  2. Sat5719 Sept
  3. Sun6020 Sept
  4. Mon6021 Sept
  5. Tue6122 Sept
  6. Wed6023 Sept
  7. Thu5424 Sept
Milk White Brittlegill — botanical illustration

Milk White Brittlegill

Russula delica

Building59 today

Week's best 65 — on Tuesdayaverage 62by the weekend steady

Conditions are best on Tuesday.

  1. Today5918 Sept
  2. Sat6119 Sept
  3. Sun6420 Sept
  4. Mon6421 Sept
  5. Tue6522 Sept
  6. Wed6423 Sept
  7. Thu5824 Sept
Black Morel — botanical illustration

Black Morel

Morchella elata

Quiet0 today

Zero all week: this species is not fruiting now.

Fly Agaric — botanical illustration

Fly Agaric

Amanita muscaria

Building63 today

Week's best 71 — on Wednesdayaverage 67by the weekend steady

Conditions are best on Wednesday.

  1. Today6318 Sept
  2. Sat6519 Sept
  3. Sun6820 Sept
  4. Mon6821 Sept
  5. Tue7022 Sept
  6. Wed7123 Sept
  7. Thu6624 Sept
Panthercap — botanical illustration

Panthercap

Amanita pantherina

Building62 today

Week's best 68 — on Mondayaverage 65by the weekend steady

Conditions are best on Monday.

  1. Today6218 Sept
  2. Sat6419 Sept
  3. Sun6720 Sept
  4. Mon6821 Sept
  5. Tue6822 Sept
  6. Wed6623 Sept
  7. Thu6024 Sept

Orange Birch Bolete

Leccinum versipelle

Building62 today

Week's best 68 — on Sundayaverage 65by the weekend steady

Conditions are best on Sunday.

  1. Today6218 Sept
  2. Sat6419 Sept
  3. Sun6820 Sept
  4. Mon6821 Sept
  5. Tue6822 Sept
  6. Wed6723 Sept
  7. Thu6124 Sept

Stinking Brittlegill

Russula foetens

Building60 today

Week's best 66 — on Sundayaverage 63by the weekend steady

Conditions are best on Sunday.

  1. Today6018 Sept
  2. Sat6219 Sept
  3. Sun6620 Sept
  4. Mon6621 Sept
  5. Tue6622 Sept
  6. Wed6523 Sept
  7. Thu5924 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 Karlovacka? 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 Karlovacka in September 2026?

Yes — conditions in Karlovacka in September 2026 are good, index 68 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 Karlovacka 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 Karlovacka?

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 68 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.