A “day” on Venus (one full spin on its axis) is about 243 Earth days long, and it spins backward compared to Earth’s rotation.

Quick Scoop: How long is a day on Venus?

  • One Venus day (rotation period) ≈ 243 Earth days.
  • That’s longer than a Venus year, which is about 225 Earth days.
  • Because of its slow, backward spin, the solar day (noon to noon) on Venus is about 116–117 Earth days.
  • Detailed radar studies give an average of 243.0226 Earth days , and it can vary by up to about 20 minutes from measurement to measurement.

So if you’re asking “how long is a day on Venus?” in the usual rotational sense, the headline answer is:

A day on Venus lasts about 243 Earth days – almost eight months for a single spin.

Information gathered from public forums or data available on the internet and portrayed here.