Bowcast

Guides

Rainbows are not luck. They are geometry plus weather, and both can be read. Field guides from the Bowcast project:

• How to photograph a rainbow Settings, timing, and the polarizer trick that can double or erase a bow
• The best places on Earth to see rainbows Hawaii's daily bows, Ireland's shower-light, and rainbows you can schedule

City forecasts

Live rainbow odds for places where the sky earns its reputation: browse all city forecasts.