Numbers become living things: surge, retreat, the moon's pull on the Pacific. Then you go see what was hiding.
Tidal literacy is a portal into marine science. Finding a nudibranch you predicted would be there is one of life's small joys.
NOAA Tides & Currents app · Between Pacific Tides (Ricketts & Calvin) · any coastal area near you
Perfect for: beachgoers, scientists-at-heart, patient people