The society for people who love the sky
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Today's Cloud-a-Day
Saturday 19th July 2025
Kim Huelsman (Member 53,048) was on a Father’s Day outing when she noticed this fragment of bright prismatic colour in the sky over Escondido, California, US.
It isn’t a rainbow but part of an optical phenomenon known as a circumh…
Cloud of the Month
July 2025
Download Our Free CloudSpotter App
Discover the wonders of clouds with our CloudSpotter app.
Discover the amazing world of clouds with your pocket guide to the wonders of the sky and have your spottings verified as you build a collection of clouds.
Our CloudSpotter app will teach you how to spot 58 different cloud formations and optical effects, from the common ones like Cumulus clouds and rainbows to rare ones like the fleeting fluctus cloud or the hard to spot circumzenithal arc. Learn what makes each formation special with expert text from the Cloud Appreciation Society and stunning reference photographs by our app users around the world.
Build up your own Collection of spottings and use our innovative tools to find out what type of clouds or optical effects you’ve spotted. See New Spottings by other users around the world and say (with our help) if you think they got the clouds right. CloudSpotter can even analyse your image and say what cloud types it thinks you’ve spotted. Becoming an expert cloudspotter has never been easier or more fun!
Cloudspotting for Beginners
A collaboration with award-winning illustrator William Grill, Cloudspotting for Beginners is a stunning introduction to clouds and the sky. We are very proud of this beautiful hardback book. Charming, uplifting, and easy to understand for all ages, Cloudspotting for Beginners will inspire anyone curious about clouds to look up at the sky with a new understanding and appreciation.
Our Memory Cloud Atlas
On Cloud Appreciation Day, Friday September 13th, 2024, friends and members of the Cloud Appreciation Society contributed photographs of their skies to our Memory Cloud Atlas. The Atlas was open for contributions on this day only. It stands as a snapshot of a world looking up and appreciating the sky on one particular day.
New from our Members
A Survival Kit for the Imagination
Our downloadable lesson plans and resources for schools and homeschools teaching about the sky.
News
Noctilucent Clouds: A Citizen Science Project
Celebrating 250 Years of J.M.W. Turner
