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Portsmouth Tide Times
Tide table
High & lowLoading NOAA predictions…
48-hour tide chart
MLLW · ft7-day tide forecast
NOAA predictionsLocation
43.0783, -70.7517About the Portsmouth tide station
Portsmouth is a subordinate station on the New Hampshire coast. NOAA derives predictions by applying time and height offsets to a nearby reference station. Its reference station is Portland. Predictions on this page are astronomical — driven by the Moon and Sun — and do not include wind, pressure or storm surge. Where NOAA operates a live sensor, the water level reading shows the real tide right now, which is the best check on conditions.
What time is high tide today at Portsmouth?
The next high tide at Portsmouth is shown in the tide clock at the top of this page and in today's tide table, calculated by NOAA for station 8423745. Times are local to New Hampshire.
What time is low tide today at Portsmouth?
Low tide times for Portsmouth appear in today's tide table and on the day timeline, together with the predicted height in feet above Mean Lower Low Water (MLLW).
When is the best time to visit the beach or tide pools at Portsmouth?
Aim for the 90 minutes either side of a daylight low tide — the 'Beach · tide pools' window on this page. The lower the low, the more sand and rock is exposed; spring tides around new and full moon give the lowest lows.
How accurate are Portsmouth tide predictions?
NOAA's astronomical predictions are typically within a few inches and minutes under normal weather. Strong wind, storm surge and river discharge can push the real water level above or below the prediction, so check the observed level where a live sensor exists.
What does MLLW mean?
Mean Lower Low Water is the average of the lower of the two daily low tides over a 19-year period. A reading of 0.0 ft is a normal low; negative values are unusually low tides.