Sainte-Chapelle: when does the light look like the photo?

Questions

What is the best time to see the light inside Sainte-Chapelle?

Deep blue and red light reaches deep inside from 10:35 to 15:25, strongest around 15:05; book the 14:00 slot. That is for 6 November 2026; the time changes through the year, so pick your own date above.

Which months are best for the stained-glass light at Sainte-Chapelle?

For the south windows (old testament stories), January, November, December give the deepest, strongest colour; May, July, June the weakest. Low sun facing the windows throws colour furthest.

Which side of Sainte-Chapelle is lit in the morning and which in the afternoon?

The apse windows (east-south-east, the passion) (deep blue and red) catch the morning sun. The south windows (old testament stories) (deep blue and red) catch the midday sun. The west rose (the apocalypse) (blue, red and gold) catch the late afternoon sun.

Why does the time of day matter so much?

You may read that light only reaches the middle of a church when the sun is between about 18° and 32° high. The idea behind it is right: the lower the sun, the further its light travels across the floor. The exact band depends on how high the windows are and which way they face, so we work it out for each building instead of using one rule.

What if it is cloudy?

Then there are no coloured patches on the floor or columns, only a soft glow in the glass. Check the forecast the day before and keep a flexible ticket if you can.