Our apologies. The webcam is having technical difficulties. We hope to have the tugs back soon.
River traffic. Piscataqua River currents restrict travel by tankers and other large vessels to slack tide, roughly four hours a day. See chart below for slack tide at the entrance to Portsmouth Harbor. The entrance is nearly three miles from the location of the PortsmouthNH.com's HarborCam. Slack tide at the Harbor Cam is roughly a half hour later. A schedule of shipping in the Piscataqua is not available.
Currents. The swift currents of the Piscataqua River make it among he fastest flowing tidal waterways in the Continental United States (NOAA list of 50 fastest in North America; look for "Nobles Island, north of"). The ice-free deep-water channel has been used for shipping since the 1600s.
Piscataqua River Currents|
Sat 02:39am EST -1.85 knots Max Ebb
Sat 06:23am EST 0.00 knots Slack, Flood Begins
Sat 06:35am EST Moonrise
Sat 06:44am EST Sunrise
Sat 07:32am EST New Moon
Sat 08:32am EST 1.50 knots Max Flood
Sat 12:13pm EST -0.00 knots Slack, Ebb Begins
Sat 03:07pm EST -2.17 knots Max Ebb
Sat 04:13pm EST Sunset
Sat 04:42pm EST Moonset
Sat 07:05pm EST 0.00 knots Slack, Flood Begins
Sat 09:01pm EST 1.29 knots Max Flood
Sun 12:38am EST -0.00 knots Slack, Ebb Begins
Sun 03:24am EST -1.92 knots Max Ebb
Sun 06:45am EST Sunrise
Sun 07:05am EST 0.00 knots Slack, Flood Begins
Sun 07:37am EST Moonrise
Sun 09:18am EST 1.59 knots Max Flood
Sun 12:51pm EST -0.00 knots Slack, Ebb Begins
Sun 03:52pm EST -2.27 knots Max Ebb
Sun 04:12pm EST Sunset
Sun 05:33pm EST Moonset
Sun 07:48pm EST 0.00 knots Slack, Flood Begins
Sun 09:47pm EST 1.39 knots Max Flood
About the Piscataqua River. This Piscataqua River is a 13-mile long tidal estuary formed by merging of the Salmon and Cocheco rivers. The river, which separates Maine and New Hampshire, also drains Great Bay, a National Estuarine Research Reserve site. The last 8.8 miles of the Piscataqua River constitute Portsmouth Harbor, which stretches across New Castle, Portsmouth, and Newington, and the Maine communities of Kittery and Eliot.
New Hampshire-Maine border. The N.H.-Maine border lies in the middle of the Piscataqua River. Its exact location was the subject of a long-running dispute settled by the U.S. Supreme Court.
What kind of name is Piscataqua (piss-cat-a-qwa)? Easy for you to say, but not so easy to spell. See an extended examination of the origin of the word at SeacoastNH.com and 20 ways to spell Piscataqua.
More information. For more about the Piscataqua River, see the Army Corps of Engineers Water Resources web page.