New England
Brant Rock
Green Harbor River · Massachusetts · NOAA station 8446009 · Tide predictions
42.0833, -70.6467
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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
Boston buoy · 18 mi N · Station 44013
Wind & wave reports →
Nearby tide stations
- Duxbury, Duxbury Harbor · 3.3 mi S
- Damons Point, North River · 6.9 mi NW
- Plymouth · 8.6 mi S
- Scituate, Scituate Harbor · 9.2 mi NW
- Cohasset Harbor (White Head) · 13.4 mi NW
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 11.5 ft — Tue Jul 6 · 1:12 AM
Lowest predicted low tide: -1.6 ft — Sat Jan 23 · 5:54 PM
Biggest single-day swing: 12.9 ft on Sat Jan 23
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sat Jan 23 | 5:54 PM | -1.6 ft |
| Sun Jan 24 | 6:43 PM | -1.6 ft |
| Fri Jan 22 | 5:04 PM | -1.4 ft |
| Wed Aug 4 | 7:15 AM | -1.3 ft |
| Tue Jul 6 | 7:36 AM | -1.3 ft |
| Sun Feb 21 | 5:34 PM | -1.3 ft |
| Wed Jul 7 | 8:27 AM | -1.3 ft |
| Thu Aug 5 | 8:04 AM | -1.2 ft |
| Mon Feb 22 | 6:20 PM | -1.2 ft |
| Fri Oct 1 | 6:57 PM | -1.2 ft |
178 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
Brant Rock, Green Harbor River 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.