Everyday weather, done properly.
Forecasts up to 4 days ahead for any place in the world, with global satellite imagery, sea state and air quality on the same map. Where available you can also follow precipitation on radar; in Europe you also get pollen and the reliability of the forecast, and in Italy the hail radar. All free.
🌍 The whole world, and the best model for every European country
The map doesn't stop at the border: zoom out and you get the whole continent — from Lapland to Gibraltar, from Lisbon to Istanbul — and then the rest of the world, where the forecast comes from global models. In Europe we don't stretch one global model over the continent: ExtremeCast compares several sources and picks, for each area, the best high-resolution model available, merging everything into its own reading.
Local detail
Where a high-resolution national model exists, you get its detail — down to 1 km in the Alps and Scandinavia — instead of a continental average.
One reading
Several sources compared and merged by ExtremeCast into a single, consistent forecast: no gaps, no jumps at the borders.
Agreement shown
Every European card carries a reliability index: how much the models agree here, right now.
Every place gets the best source available for it, and your card stays complete everywhere — up to 4 days ahead.
Rain probability and reliability — our own numbers
In Europe, two values in every location card come from our processing, not from a single model. Outside Europe the card shows the global model's forecast, without these two numbers.
Rain probability
Built from several independent models and from the behaviour of the surrounding area — because a shower is a local affair: what the number really tells you is how likely rain is around you.
Reliability index
How much the models agree on your spot. High = solid forecast; low = the atmosphere is uncertain here, worth checking again later. We show uncertainty rather than hiding it.
The map layers: sky, temperature, rain
One tap changes how you read the map. Sky shows cloud cover and weather type; Temperature paints the continent in thermal bands; Rain highlights where and how much it will rain, staying transparent where it stays dry. Under More you also find Wind (including upper levels), Snow (snowfall, fresh snow and snow depth), Visibility, Sea, Pollen and Air, and Temperature can be read aloft too, from 925 to 500 hPa. Then there is Radar, which shows what is happening rather than what is forecast — see below.
Weather radar: Europe, the United States, Canada, Taiwan
The Radar layer is the odd one out: it isn't a forecast at all. It shows observed precipitation — where it is raining right now — and it covers Italy and the rest of Europe, the United States (including Alaska, Hawaii and Puerto Rico), Canada and Taiwan, each from its national radar network. Zoom out and you can follow a front crossing France, showers over the British Isles and storms along the Alps in a single view. Where a country does not share radar data the map has no radar: there the satellite imagery, available worldwide, and the forecast rain help. The hail radar is available for Italy.
Tap a point where there is an echo and you get its intensity in dBZ, with a plain-language reading next to it: below 20 dBZ a weak echo, 20–30 light precipitation, 30–38 moderate, 38–45 heavy, above 45 very heavy. Higher numbers mean a more intense echo — not a heavier forecast.
Pollen, species by species
The Pollen view doesn't stop at a single "pollen level". Tap a point and you get each available species on its own line, with its value in gr/m³ and its own rating — so if you only react to one of them, you don't have to guess from a combined index.
Available for Europe. Source: the CAMS Europe model (Copernicus). These are modelled values, not readings from monitoring stations, and the per-species thresholds are indicative.
Air quality
The Air view colours the map by PM2.5, worldwide, and for the point you pick gives you the main pollutants:
Source: the CAMS models (Copernicus) — CAMS Europe over Europe, CAMS Global elsewhere. Modelled values, not monitoring stations.
Sea and waves
The Sea view colours the world's seas by wave height and, when you tap a point offshore, gives you the three numbers that actually decide a day on the water:
Wave models from DWD: EWAM over Europe, GWAM elsewhere. Values are offshore — closer to the coast, waves are lower.
Search anywhere, then click
Type "Paris", "München", "Den Haag" or "L'Aia": the search knows 70,000+ European places and thousands more worldwide, in local names and Italian exonyms alike. Or just click anywhere on the map — a Pyrenean village, a Norwegian fjord or a city on another continent — and the full card opens: temperature and feels-like, wind, humidity and cloud cover, plus rain probability and reliability in Europe.
The interactive meteogram
From the location card you can open the detailed trend: one chart with temperature, feels-like, rain, cloud cover, wind, humidity and pressure, hour by hour over the coming days. Hover it (or touch it) to read the exact values at any hour and see when the weather turns.
How often it updates
The map is rebuilt every 3 hours, and each source is refreshed as soon as a new run is published. The location card you open with a click is live: it is computed on the spot, so it always reflects the freshest data available.
Data: Open-Meteo and national weather services (DWD, Météo-France, MeteoSwiss, GeoSphere, KNMI, DMI, MET Norway, CHMI, UK Met Office, ARPAE) — CC-BY licence. Model selection, rain probability and reliability index: ExtremeCast processing. Radar: Italian Civil Protection Department (Italy), EUMETNET/OPERA (rest of Europe), NOAA MRMS (United States), Environment and Climate Change Canada, Central Weather Administration (Taiwan). Satellite: EUMETSAT, NOAA GOES, JMA Himawari. Pollen: CAMS Europe; air quality: CAMS Europe and CAMS Global (Copernicus). Waves: DWD EWAM and GWAM.
Also in ExtremeCast — Italy only
Two more products live inside ExtremeCast and are, today, available for Italy only: the severe-storm risk map (hail, damaging gusts, torrential rain, storm cells, e-mail alerts) and Mountain (weather at the real altitude of 46,000 peaks, huts, passes and trails, with a winter ski mode). Both are built on ground truth we can verify — Italian radar, 3,750+ ground stations and human storm reports — which is exactly why we don't pretend they work elsewhere yet. Their pages are in Italian: severe risk · mountain.