Simple Tides / Guides / Portsmouth Tides
Portsmouth Tide Chart
Portsmouth — New Hampshire’s historic seacoast city on the Piscataqua River — feels an eight-foot semidiurnal tide, predicted from the NOAA station on Seavey Island just across the river in Kittery, Maine.
Upcoming tides in Portsmouth
Live NOAA predictions for station 8419870 (Seavey Island).
| Day | Time | Tide | Height |
|---|---|---|---|
| Loading live tide predictions… | |||
Heights in feet above MLLW, station local time. See the full interactive tide map.
The pattern
Two highs and two lows daily with around eight feet of range — big New England water. The Piscataqua is one of the fastest-flowing tidal rivers in the country, ripping past the downtown waterfront twice a day.
Seacoast fishing
Striped bass run the river on the tide; the rocky coast gives up tautog and pollock. The working harbor — tugs, tankers, and the naval shipyard — shares the river with some of the region’s best shore fishing.
Boating
The Piscataqua’s current is the boss — several knots on a big ebb, with standing waves at the bridges. Time harbor transits near slack. For the region, see our New England tides guide.