Portsmouth, New Hampshire — 2027 Tide Poster (Strokes)

Every high tide in Portsmouth Harbor for all of 2027, painted as a year of brushstrokes.

Each row is one day, midnight to midnight. Every stretch of hours when the water stands above half tide is a horizontal stroke, with its time and height printed on it. Because the tide comes about fifty minutes later each day, the strokes braid into diagonals, and one sweep across the page is one lunar month. The colour deepens with the height of the water, so the spring tides after each new and full moon run darkest. The twelve highest tides of the year are picked out in signal red, and the low tides are marked as small open dots. Day numbers and month names run down both margins; weekends are tinted so you can find a Saturday at a glance.

Tide predictions are from NOAA's Portsmouth Harbor station. Highest tide of the year 10.0 ft, mean range 7.7 ft. Moon phases are shown in the margin. For planning the year, not for navigation.

Printed to order in the USA on heavyweight 189 gsm matte paper with archival pigment inks. Ships rolled in a rigid tube, or framed in black wood and ready to hang. Gift note included on request at checkout.

Sizes: 12 x 18, 18 x 24, 24 x 36 inches. Also available in the Currents design.