virga
Now
+6 h
+1 d
+3 d
+7 d
+14 d
+30 d

The whole sky, thirty days early.

Virga-1 is a foundation model of the atmosphere. It forecasts every square kilometre of Earth, every hour, a month ahead.

Read the model cardGet an API key

One model for the whole atmosphere.

Trained on eighty years of reanalysis and a decade of satellite radiances, Virga-1 rolls the planet forward an hour at a time: a 1 km grid, 37 levels of air, 120 variables.

Console/North Atlantic deskShare
+3 d

Down to your street, not your county.

A global model sees a city as a handful of 9 km squares, and a storm cell can fall between them. Virga sees every kilometre. Move the lens across the squall line.

Under the lens

Virga · 1 km

0.0mm/h

Global · 9 km

0.0mm/h

1 kmgrid spacing, everywhere on Earth

Hourlysteps, out to day 30

64ensemble members, so every number has a spread

Light to heavy rainSample field, not a real observation

Ask for a window, not a forecast.

Tell Virga what the job can tolerate. It scores every hour of the next month by the chance it stays inside your limits.

Best windows

1+1 d · 18:00–00:0091%

2+3 d · 00:00–06:0088%

3+2 d · 18:00–00:0087%

Crane lift · Port of Rotterdam

241 of 720 hours pass · 3 windows

Now+7+14+21+30
00061218
123
More likely inside limitsLikely outsideBest windows

One sky, read four ways.

Hornsea wind farm · output

NEXT 72 H · MW

dip
Now+24 h+48 h+72 h
+1 d · 04:00–11:00

Output dips to 31% of capacity on Tuesday morning as the front stalls over the farm.

Hedge 412 MWhSnooze

Capacity factor, next 7 days

47%

±6% across the ensemble

Graded every morning, in public.

Every run is scored against 11,402 weather stations and the following day’s analysis. This is last year’s card.

Change in forecast error against a leading global physics model, by variable and lead time. Negative is better.
VariableDay 1Day 2Day 3Day 5Day 7Day 10Day 15Day 20Day 30
Z500Geopotential, 500 hPa−4−6−10−16−15−15−12−9−3
T850Temperature, 850 hPa−2−7−9−11−13−14−9−5−3
T2MTemperature, 2 m−4−5−6−10−12−10−7−6−3
U10Wind, 10 m−2−5−10−13−13−14−11−7−2
MSLPSea-level pressure−3−8−9−12−15−16−10−6−4
TP24Rain, 24 h total+1−3−5−9−10−8−6−6−2
Q700Humidity, 700 hPa−1−4−7−9−9−10−8−4−1
TCCyclone track+2+2−3−5−7−7−3−3−3
% change in error vs a leading global physics modelVirga betterVirga worseSample scores, 2025 test year

Wind, 10 m · day 3 · -10%

“Day-three wind is our whole winter. We cut imbalance costs by 18% in the first season.”
Halden Energy · Balancing desk

Rain, 24 h total · day 7 · -10%

“We plan harvest crews off the seven-day rain. Two lost days last year, against eleven the year before.”
Vinhedo Co-op · Growers, 41 farms

Cyclone track · day 7 · -7%

“Track error at a week out is what moves our reserves. Virga gives us an extra two days of notice.”
Meridian Re · Catastrophe desk

One request. Thirty days of answers.

RESTPythonTypeScriptZarr exportWebhooks
curl https://api.virga.example/v1/forecast \
  -H "Authorization: Bearer $VIRGA_KEY" \
  -d lat=51.92 -d lon=4.48 \
  -d vars=t2m,gust,p_rain -d hours=48
Sending…
{  "point": { "lat": 51.92, "lon": 4.48, "name": "Rotterdam" },  "run": "2026-10-23T06:00Z", "model": "virga-1.4",  "hourly": {    "t2m": [10.5, 11.3, 12.1, …],    "gust": [40, 45, 49, …],    "p_rain": [0.08, 0.11, 0.16, …]  },  "spread": { "t2m": [0.4, 0.4, 0.4, …] }}

Rotterdam · next 48 h

Hover a field or a row

t2mTemperature, 2 m

10.5 → 8.3 °C

spread.t2mSpread

±0.4 → ±1.4 °C

gustGusts

peak 53 km/h

p_rainChance of rain

22 wet hours

07:00+24 h+48 h

Pay for the sky you cover.

Drag the circle over the places you care about, and its edge to size it. The ring it fits inside is your plan.

REGION620 km

PLANET · beyond the outer ring

Your area

1.21Mkm²

Forecast points

1.2M/ hour

Start a 30-day trial

This week’s questions.

Seven days, seven things people ask before they sign up. Pick a day.

Mon · forecast

How good is a forecast thirty days out?

Honestly: good for patterns, not for hours. At a month out Virga tells you that the second week of November will run wetter and windier than normal along the North Sea coast, with a probability you can act on. It will not tell you it rains at 15:00 on the 19th, and it says so: the spread on every number widens with lead time.

Days 1–7Hour by hour
Days 8–15Day by day
Days 16–30Weekly anomalies

Ask the sky.

Any place on Earth, any hour in the next thirty days. Try one here, then take a key and ask it a million times.

Free on Field. No card. Or talk to a forecaster about Planet.

When

Lisbon · +7 d

Rain

High

7°

Rain

73%

Wind

23 km/h

Spread±1.9°Medium

Sample output · GET /v1/forecast?place=Lisbon