Are there mushrooms around Isleworth right now
Today's index is 49 out of 100. Poor — something is possible, but do not count on a full basket.
The forecast is computed at the nearest weather point — 6 km from the town. It is an estimate for the country around the town rather than a measurement in it: within half an hour's drive the weather barely changes, though any single wood can still go its own way. Data from 18 September 2026, 11:37 BST.
Isleworth itself is not inside any of our forecast districts: ours are rural, and the town is its own administrative unit. Hertfordshire is the nearest district, and the numbers come from its measurements.
Isleworth and the country around it
The ring marks Isleworth, the dots are the rest of the measurement network in Hertfordshire. The field between points is interpolated; clicking a point opens its town.
Nearest towns
The forecast in these towns can differ — the further away, the more. In brackets, the best edible species today.
The week, species by species
23 species are in season in Hertfordshire right now — ordered by today's index. Another 3 species are out of season: the index reads zero all week.
Boletus edulis
Boletus edulis
Week's best 49 — on Fridayaverage 46by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4918 Sept
- Sat4919 Sept
- Sun4920 Sept
- Mon4921 Sept
- Tue4222 Sept
- Wed4123 Sept
- Thu4124 Sept
Imleria badia
Imleria badia
Week's best 48 — on Fridayaverage 45by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4818 Sept
- Sat4819 Sept
- Sun4820 Sept
- Mon4821 Sept
- Tue4122 Sept
- Wed4023 Sept
- Thu3924 Sept
Leccinum aurantiacum
Leccinum aurantiacum
Week's best 45 — on Fridayaverage 42by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4518 Sept
- Sat4419 Sept
- Sun4420 Sept
- Mon4421 Sept
- Tue4022 Sept
- Wed3823 Sept
- Thu3724 Sept
Amanita muscaria
Amanita muscaria
Week's best 47 — on Mondayaverage 43by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4518 Sept
- Sat4419 Sept
- Sun4520 Sept
- Mon4721 Sept
- Tue4222 Sept
- Wed3923 Sept
- Thu3724 Sept
Leccinum versipelle
Leccinum versipelle
Week's best 45 — on Fridayaverage 42by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4518 Sept
- Sat4419 Sept
- Sun4420 Sept
- Mon4421 Sept
- Tue4022 Sept
- Wed3823 Sept
- Thu3724 Sept
Suillus granulatus
Suillus granulatus
Week's best 45average 43by the weekend steady
Conditions stay poor all week — not worth the trip yet.
- Today4418 Sept
- Sat4419 Sept
- Sun4520 Sept
- Mon4521 Sept
- Tue4322 Sept
- Wed4223 Sept
- Thu4124 Sept
Leccinum scabrum
Leccinum scabrum
Week's best 44 — on Fridayaverage 41by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4418 Sept
- Sat4319 Sept
- Sun4320 Sept
- Mon4321 Sept
- Tue4022 Sept
- Wed3823 Sept
- Thu3724 Sept
Amanita pantherina
Amanita pantherina
Week's best 44 — on Fridayaverage 41by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4418 Sept
- Sat4419 Sept
- Sun4420 Sept
- Mon4421 Sept
- Tue3922 Sept
- Wed3723 Sept
- Thu3624 Sept
Macrolepiota procera
Macrolepiota procera
Week's best 43 — on Fridayaverage 40by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4318 Sept
- Sat4219 Sept
- Sun4220 Sept
- Mon4221 Sept
- Tue3922 Sept
- Wed3723 Sept
- Thu3524 Sept
Russula foetens
Russula foetens
Week's best 43 — on Fridayaverage 40by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4318 Sept
- Sat4319 Sept
- Sun4320 Sept
- Mon4321 Sept
- Tue3822 Sept
- Wed3623 Sept
- Thu3524 Sept
Russula delica
Russula delica
Week's best 42 — on Fridayaverage 39by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4218 Sept
- Sat4119 Sept
- Sun4220 Sept
- Mon4221 Sept
- Tue3622 Sept
- Wed3523 Sept
- Thu3424 Sept
Lactarius deliciosus
Lactarius deliciosus
Week's best 43 — on Mondayaverage 38by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4118 Sept
- Sat4019 Sept
- Sun4120 Sept
- Mon4321 Sept
- Tue3822 Sept
- Wed3423 Sept
- Thu3224 Sept
Xerocomellus chrysenteron
Xerocomellus chrysenteron
Week's best 41 — on Fridayaverage 39by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today4118 Sept
- Sat4119 Sept
- Sun4120 Sept
- Mon4121 Sept
- Tue3722 Sept
- Wed3523 Sept
- Thu3424 Sept
Cantharellus cibarius
Cantharellus cibarius
Week's best 39 — on Fridayaverage 37by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today3918 Sept
- Sat3919 Sept
- Sun3920 Sept
- Mon3921 Sept
- Tue3622 Sept
- Wed3523 Sept
- Thu3424 Sept
Suillus bovinus
Suillus bovinus
Week's best 39 — on Fridayaverage 36by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today3918 Sept
- Sat3819 Sept
- Sun3920 Sept
- Mon3821 Sept
- Tue3422 Sept
- Wed3223 Sept
- Thu3124 Sept
Armillaria mellea
Armillaria mellea
Week's best 40 — on Mondayaverage 37by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today3818 Sept
- Sat3719 Sept
- Sun3920 Sept
- Mon4021 Sept
- Tue3722 Sept
- Wed3423 Sept
- Thu3224 Sept
Lactarius resimus
Lactarius resimus
Week's best 39 — on Mondayaverage 35by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today3818 Sept
- Sat3719 Sept
- Sun3820 Sept
- Mon3921 Sept
- Tue3222 Sept
- Wed3023 Sept
- Thu2824 Sept
Agaricus campestris
Agaricus campestris
Week's best 37average 36by the weekend steady
Conditions stay poor all week — not worth the trip yet.
- Today3718 Sept
- Sat3719 Sept
- Sun3720 Sept
- Mon3621 Sept
- Tue3722 Sept
- Wed3523 Sept
- Thu3324 Sept
Kuehneromyces mutabilis
Kuehneromyces mutabilis
Week's best 35 — on Fridayaverage 33by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today3518 Sept
- Sat3419 Sept
- Sun3420 Sept
- Mon3421 Sept
- Tue3322 Sept
- Wed3123 Sept
- Thu2824 Sept
Marasmius oreades
Marasmius oreades
Week's best 34average 33by the weekend steady
Conditions stay poor all week — not worth the trip yet.
- Today3418 Sept
- Sat3319 Sept
- Sun3320 Sept
- Mon3321 Sept
- Tue3322 Sept
- Wed3223 Sept
- Thu3024 Sept
Lycoperdon perlatum
Lycoperdon perlatum
Week's best 34average 33by the weekend steady
Conditions stay poor all week — not worth the trip yet.
- Today3418 Sept
- Sat3419 Sept
- Sun3320 Sept
- Mon3321 Sept
- Tue3322 Sept
- Wed3123 Sept
- Thu3024 Sept
Collybia nuda
Collybia nuda
Week's best 31 — on Mondayaverage 28by the weekend falling
Conditions are poor: even the week's best day only reaches «slow».
- Today2818 Sept
- Sat2819 Sept
- Sun2920 Sept
- Mon3121 Sept
- Tue2922 Sept
- Wed2623 Sept
- Thu2324 Sept
Collybia personata
Collybia personata
Week's best 24 — on Mondayaverage 21by the weekend falling
Conditions are poor: even the week's best day only reaches «quiet».
- Today2218 Sept
- Sat2219 Sept
- Sun2320 Sept
- Mon2421 Sept
- Tue2222 Sept
- Wed1923 Sept
- Thu1724 Sept
The weather this number came from
On the left, what has already happened; on the right, what is expected. The left half matters more: a flush comes a week to ten days after the rain, not on the same day.
- 11 сент.18°0.6 mm
- 12 сент.17°0.7 mm
- 13 сент.20°1.2 mm
- 14 сент.20°0.3 mm
- 15 сент.18°0.1 mm
- 16 сент.16°0.4 mm
- 17 сент.16°1.7 mm
- 18 сент.15°—
- 19 сент.18°1.2 mm
- 20 сент.17°0.2 mm
- 21 сент.17°—
- 22 сент.20°—
- 23 сент.18°—
- 24 сент.16°—
Boletus edulis near Isleworth: where to look
Boletus edulis: the species in brief
How to tell it
A heavy, solid bolete with a brown cap and a thick stem. Near the top of the stem is a pale, raised net-like pattern. The pores are white when young, then become yellowish and finally olive with age.
Where it grows
With pine, spruce, oak, beech and other host trees, in woodland and along rides and clearings. Widespread across Europe.
In the kitchen
Excellent fried and especially good dried. Drying concentrates its aroma, which is why dried porcini are widely used in stocks, sauces and risotto.
Nutrition
Around 30 kcal per 100 g fresh is a useful rough guide, but values vary. Drying greatly concentrates both nutrients and calories.
This is a note about the species, not about what is in your basket. Full card with lookalikes →
Been out in Isleworth? 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.
Common questions
Are there mushrooms in Isleworth in September 2026?
Today's foraging index is 49 out of 100. It is built from two weeks of rainfall, soil temperature, the length of the dry spell and each species' season, and it updates daily.
Which mushrooms are picked around Isleworth?
There are too few records for this region to name species yet. We will not list them «from the field guide»: an unconfirmed list looks exactly like a confirmed one and is worth something else entirely.
How accurate is this forecast?
It is a model of weather and season, not an observation of the wood. It answers «is this week worth a trip» well, and it does not know what is growing round the next bend. We measure its accuracy against independent records and publish the result — without that number a forecast stays a promise.
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.