Merrimack R 0.3 nm US Rt 125 at Haverhill — MA, United States

Tide times & tide chart

-0.7 ft3:07am2.3 ft8:05am-0.4 ft2:43pm3.1 ft8:34pmNow
Tide predictions for Merrimack R 0.3 nm US Rt 125 at Haverhill, computed from harmonic constituents. High 3.1 feet on Mon 19 Oct 2026 at 20:30, low -0.7 feet on Mon 19 Oct 2026 at 03:10, above MLLW, the chart datum.
↑7:02am↓5:55pm

Predictions are not observations — conditions vary with weather and river flow. Not for navigation.

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Tide times for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Merrimack R 0.3 nm US Rt 125 at Haverhill (America/New_York). Heights are in feet above MLLW.
DayTideTimeHeight
Mon 19 Oct 2026Low-0.7 ft
Mon 19 Oct 2026High2.3 ft
Mon 19 Oct 2026Low-0.4 ft
Mon 19 Oct 2026High3.1 ft
Tue 20 Oct 2026Low-0.7 ft
Tue 20 Oct 2026High2.3 ft
Tue 20 Oct 2026Low-0.4 ft
Tue 20 Oct 2026High3.1 ft
Wed 21 Oct 2026Low-0.7 ft
Wed 21 Oct 2026High2.5 ft
Wed 21 Oct 2026Low-0.5 ft
Wed 21 Oct 2026High3.2 ft
Thu 22 Oct 2026Low-0.7 ft
Thu 22 Oct 2026High2.9 ft
Thu 22 Oct 2026Low-0.5 ft
Thu 22 Oct 2026High3.4 ft
Fri 23 Oct 2026Low-0.6 ft
Fri 23 Oct 2026High3.3 ft
Fri 23 Oct 2026Low-0.5 ft
Sat 24 Oct 2026High3.6 ft
Sat 24 Oct 2026Low-0.5 ft
Sat 24 Oct 2026High3.9 ft
Sat 24 Oct 2026Low-0.5 ft
Sun 25 Oct 2026High3.9 ft
Sun 25 Oct 2026Low-0.4 ft
Sun 25 Oct 2026High4.4 ft
Sun 25 Oct 2026Low-0.5 ft

Station facts

Position
42.7728° N, 71.0831° W
Time zone
America/New_York
Datum
MLLW datum · computed from harmonic constituents
Source
Harmonic constituents from TICON-4
Region
MA, United States

Heights are measured above chart datum. A negative height means there is that much less water than the charted depth shows.

Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data

How we check predictions — dated samples and their limits.

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