Free tool

Sun path diagram

Pick a city or type coordinates and see where the sun is at every hour on the solstices and the equinox, with sunrise, sunset, the highest sun and the length of the day.

Draw the sun path Shadows on a real site

Try it here, free

No account. Nothing to install.

Place

Sunrise

03:44

Sunset

20:22

Highest sun

61.9° at 12:02

Daylight

16.6 h

London, 51.51°, -0.13°. Times in standard local time (UTC+0), without daylight saving. Sun positions from the NOAA solar equations.

How to read it

The rim is the horizon and the centre is straight overhead; rings mark 30° and 60° above the horizon. Each line is the sun’s track on one day, with a dot for every hour.

Using it in design

Place windows, terraces and courtyards where the sun is when you need it, and shade where it is too strong. For shadows on the real site and its neighbours, run a sun and shadow study.

Questions

How accurate is it?

Positions use the NOAA solar equations, accurate to about a tenth of a degree. Times are standard local time without daylight saving.

What is the highest sun?

The sun’s altitude at solar noon, when it crosses the meridian, highest at the summer solstice.

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