The Irish Sea experiences a moderate current with Peak Spring Tidal Currents between 1-2m/s. Local bathymetry influences the current strengths. The tidal currents are generally low along the west and south coasts.

The density currents form a north-going flow of water through the Irish Sea which bifurcates around the Isle of Man, most of it passing to the west of the Isle. Southerly-type winds also maintain a northwards flow through the Sea, most of this passing to the east of the Isle.