tide
rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth
atmospheric tide
global-scale periodic oscillations of the atmosphere, analogous to ocean tides
high tide
instance of water rising to its highest level
storm surge
offshore rise of water associated with a low pressure weather system
ebb tide
fall of sea level for several hours, exposing intertidal zone
dead tide
when difference in water height between high tide and low tide is minimal
low tide
lowest sea level due to tide
flood tide
raising of sea level for several hours, covering the intertidal zone
mean high water spring
highest level that spring tides reach on average over a period of time