Big spring tides gift generous sand highways but punish late returns with racing channels and wet ankles. Modest neaps shrink options yet soften the clock. Matching route ambition to the fortnightly cycle keeps crossings friendly and ensures photography, picnics, and rock‑pool wanders happen without frantic glances at the watch.
Instead of memorizing fractions, picture the ocean breathing: a slow first hour, a fast middle, a slowing finish. Start across coves early in the ebb, never midway. Check local range, adjust for headlands, and give yourself daylight padding, because fatigue and conversation both steal minutes invisibly.