Tidal Current

A tidal current is the horizontal movement of seawater caused by the rise and fall of the tide. It is described by its direction and speed, often setting one way on the flood and reversing on the ebb. In channels, harbour entrances, headlands, and shallow banks, tidal currents can accelerate rapidly and create challenging conditions.

For boaters, tidal current affects speed over ground, fuel use, course to steer, and safe timing through restricted waters. A favourable Current can shorten a passage, while an adverse Tidal Stream may stop progress or increase leeway. Where Wind against Current occurs, seas can become steep, confused, and hazardous.

Tidal currents should be checked alongside tide times, local pilotage notes, and forecast wind and wave conditions. PredictWind tidal charts and stream maps help visualise flow direction and strength for coastal routing, anchoring decisions, and departure windows, complementing a traditional Tidal Atlas.