New England
Merrimacport
Massachusetts · NOAA station 8440369 · Tide predictions
42.8250, -70.9883
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48-hour outlook
Drag across the curve to inspect any time. Weather icons show the forecast at each high tide.
Drawn from the high/low predictions — NOAA publishes high/low only for this station.
The next seven days
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H = high tide · L = low tide · highs & lows in local time
On the water nearby
Great Bay Buoy buoy · 18 mi N · Station 44074
Wind & wave reports →
Nearby tide stations
- Salisbury Point · 4.2 mi E
- Riverside · 4.8 mi SW
- Newburyport · 5.9 mi E
- Plum Island, Merrimack River Entrance · 8.5 mi E
- Hampton Harbor · 9.9 mi NE
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 8.8 ft — Tue Jul 6 · 2:33 AM
Lowest predicted low tide: -1.0 ft — Sat Jan 23 · 7:37 PM
Biggest single-day swing: 9.5 ft on Tue Jul 6
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Fri Jan 22 | 6:47 PM | -0.9 ft |
| Sat Feb 20 | 6:24 PM | -0.7 ft |
| Wed Aug 4 | 8:59 AM | -0.7 ft |
| Tue Jul 6 | 9:23 AM | -0.7 ft |
| Thu Jan 21 | 5:55 PM | -0.7 ft |
| Tue Aug 3 | 8:11 AM | -0.7 ft |
| Wed Jul 7 | 10:13 AM | -0.7 ft |
| Mon Jul 5 | 8:33 AM | -0.7 ft |
| Thu Aug 5 | 9:47 AM | -0.6 ft |
| Fri Feb 19 | 5:34 PM | -0.6 ft |
149 minus tides (below 0 ft) are predicted here in 2027. The table shows up to the 10 lowest that fall between 7 AM and 7 PM — the ones worth planning a clam dig or tidepool walk around.
About this station
Merrimacport is one of NOAA's reference tide stations — its predictions are computed directly from harmonic analysis of water levels observed here, and other nearby stations are calculated from it.
Rocky shores and the country's biggest northern ranges: Eastport flirts with 20 ft, and the Gulf of Maine funnels weather as much as tide. Harbors here float — or sit in the mud — on the moon's schedule.