internet1.cz

Radar CZ

The Czech weather radar on Apple Maps, with a timeline and widgets.

Radar CZ on an iPhone: the ČHMÚ radar composite over a map of Czechia, a band of heavy rain over Moravia, and the timeline at the bottom on the latest image.Playback zoomed in on central Bohemia, the timeline scrubbed back 28 minutes while the animation runs.The same radar overlay on the hybrid satellite map.The radar legend sheet: a colour scale from drizzle at 4 dBZ to storm above 52 dBZ.The settings sheet: overlay opacity at 75 percent and the switch between max reflectivity and surface rain.
Radar data: ČHMÚ, CC BY 4.0. Real data from 24 September 2026, replayed.
01

What it does

Radar CZ draws the ČHMÚ radar composite over Apple Maps, so you can see where it rains right now and where the rain is heading.

  • A timeline with play and pause. Drag it to step through the last 30 minutes to 3 hours, one image every five minutes.
  • Home Screen and Lock Screen widgets that show the radar around a place you pick.
  • A surface rain mode that hides echoes unlikely to reach the ground.
  • A button that shows your location on the map, and a colour legend from drizzle to storm.
  • Standard, satellite and hybrid maps.
  • Settings for overlay opacity, history length, playback speed and map style.

Radar data: Czech Hydrometeorological Institute, opendata.chmi.cz, CC BY 4.0, images modified.

02

Support

Write to support@internet1.cz. Tell us your iPhone or iPad model and iOS version, and what you expected to see. We answer within one working day.

Known limitations

  • The radar covers the Czech Republic and a strip of the neighbouring countries. Outside that area the map shows no rain.
  • A new image arrives every five minutes, and ČHMÚ publishes it a few minutes after the scan. The newest frame is never quite live.
  • The app shows measured rain only. It does not forecast.
  • Without a network connection the app cannot load new images.
03

Privacy

Radar CZ does not use analytics, advertising or tracking. Read the Radar CZ privacy policy.