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Brant Rock, Green Harbor River Tide Times

Massachusetts · Station 8446009 · Updated Sep 19, 2026

Brant Rock, Green Harbor River runs a mean tidal range of about 8.7 ft. This month the highest water, 10.6 ft, comes on the afternoon of Sep 30, and the lowest, a -0.6 ft minus tide, on the evening of Sep 29.

Nearest gauge measuring live water level: Boston (8443970), about 28 mi away, high and low tides here run on average about 8 min later.

Predictedno live gauge
Next high tide 7.5 ft at 6:06 AM
High 7.5 ft · 6:06 AMLow 2.3 ft · 12:00 PMHigh 8.5 ft · 6:22 PMLow 1.6 ft · 12:47 AM
Predicted
Today's tides
High tide6:06 AM7.5 ft
Low tide12:00 PM2.3 ft
High tide6:22 PM8.5 ft

Monthly tide calendar

Flood & low finder

🌊 Biggest flood tides at Brant Rock, Green Harbor River this month: Sep 7, Sep 8, Sep 9, Sep 10, Sep 11, Sep 12, Sep 13, Sep 28, Sep 29, Sep 30. These spring highs push water up into the grass and over the oyster rock; prime for poling into flooded marsh for tailing reds.

🔻 Negative (minus) low tides at Brant Rock, Green Harbor River this month: Sep 1, Sep 8, Sep 9, Sep 10, Sep 11, Sep 12, Sep 13, Sep 14, Sep 27, Sep 28, Sep 29, Sep 30. These drain the flats and expose the oyster rock, prime for sight-fishing and clamming.

September 2026
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1H:9.4L:0.4H:10.0L:-0.0
2H:9.2L:0.6H:10.1L:0.0
3🌗H:8.9L:0.8H:10.0L:0.1
4🌗H:8.6L:1.1H:9.9
5🌗L:0.3H:8.3L:1.2H:9.9
6🌗L:0.3H:8.3L:1.2H:10.0
7L:0.2H:8.5L:1.0H:10.2
8L:-0.0H:8.9L:0.6H:10.4
9L:-0.3H:9.4L:0.2H:10.6
10L:-0.4H:9.8L:-0.1H:10.6
11🌑L:-0.5H:10.1L:-0.4
12🌑H:10.4L:-0.3H:10.3L:-0.4
13🌑H:10.1L:-0.1H:10.2L:-0.3
14H:9.7L:0.3H:10.0L:-0.0
15H:9.2L:0.8H:9.7L:0.3
16H:8.7L:1.2H:9.4L:0.7
17H:8.2L:1.7H:9.0L:1.1
18🌓H:7.8L:2.1H:8.7L:1.4
19🌓H:7.5L:2.3H:8.5
20🌓L:1.6H:7.4L:2.4H:8.4
21🌓L:1.6H:7.5L:2.3H:8.6
22L:1.5H:7.7L:2.0H:8.8
23L:1.3H:8.1L:1.6H:9.0
24L:1.0H:8.5L:1.2H:9.2
25🌕L:0.8H:9.0L:0.7H:9.4
26🌕L:0.6H:9.4L:0.3
27🌕H:9.6L:0.4H:9.9L:-0.1
28🌕H:9.7L:0.3H:10.2L:-0.4
29H:9.6L:0.3H:10.5L:-0.6
30H:9.5L:0.4H:10.6L:-0.6

Best fishing times (solunar)

Major and minor solunar windows for Brant Rock, Green Harbor River, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).

DayMajor windowsMinor windowsScore
Today 🌓6:29–8:29 PM
6:54–8:54 AM		2:11–4:11 PM
10:50–12:50 AM		41
Sun Sep 20 🌓7:18–9:18 PM
7:43–9:43 AM		2:50–4:50 PM
—		54
Mon Sep 21 🌓8:06–10:06 PM
8:31–10:31 AM		3:22–5:22 PM
11:52–1:52 AM		67
Tue Sep 22 🌔8:51–10:51 PM
9:16–11:16 AM		3:49–5:49 PM
12:56–2:56 AM		77
Wed Sep 23 🌔9:35–11:35 PM
10:00–12:00 PM		4:13–6:13 PM
2:02–4:02 AM		86
Thu Sep 24 🌔10:19–12:19 AM
10:44–12:44 PM		4:34–6:34 PM
3:08–5:08 AM		93
Fri Sep 25 🌕—
—		4:55–6:55 PM
4:15–6:15 AM		96

Predictions & observations: NOAA CO-OPS station 8446009. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.

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