A poetry chapbook that reflects on shifting time and tides through the language of the shoreline. Pattie McCarthy's extraordinary tides occupies a space in the intertidal, the in-between place of not-quite-land and not-quite-sea. The poems reflect on passing time, fluctuating tides, and on our efforts to predict both. Upon a ground that is always in flux beneath us, McCarthy invites us to question if and how we really know where we are. Considering the language of the tides, the poems in this chapbook make a wrackline palimpsest, a seastruck archive, a marginalia of the littoral. McCarthy's extraordinary tides is the winner of the 2021 Omnidawn Poetry Chapbook Contest, chosen by Rae Armantrout.