TidalMap

Oceanographic Institution Tide Times

Massachusetts · Station 8447930 · live gauge · Updated Aug 5, 2026

Oceanographic Institution runs a mean tidal range of about 1.7 ft. This month the highest water, 2.9 ft, comes on the evening of Aug 11, and the lowest, a -0.2 ft minus tide, on the morning of Aug 13.

2.4 ftobserved 2:36 PM

Next low tide 0.4 ft at 9:54 PM

PredictedObserved

Monthly tide calendar

Flood & low finder Flood tide ≥ ft Low tide ≤ ft

🌊 Biggest flood tides at Oceanographic Institution this month: Aug 8, Aug 9, Aug 10, Aug 11, Aug 12, Aug 13. 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 Oceanographic Institution this month: Aug 10, Aug 11, Aug 12, Aug 13, Aug 14. These drain the flats and expose the oyster rock — prime for sight-fishing and clamming.

August 2026

Sun

Mon

Tue

Wed

Thu

Fri

Sat

1L:0.3H:1.9L:0.5H:2.1

2L:0.3H:2.0L:0.5H:2.0

3L:0.4H:2.1L:0.5

4H:1.8L:0.4H:2.2L:0.5

5🌗H:1.7L:0.5H:2.3L:0.4

6🌗H:1.6L:0.4H:2.3L:0.3

7🌗H:1.6L:0.4H:2.4

8L:0.2H:1.6L:0.3H:2.6

9L:0.1H:1.7L:0.2H:2.7

10L:-0.0H:1.9L:0.1H:2.8

11L:-0.1H:2.1L:0.0H:2.9

12🌑L:-0.2H:2.2L:-0.0H:2.8

13🌑L:-0.2H:2.3L:-0.0H:2.7

14🌑L:-0.1H:2.4L:0.1H:2.5

15🌑L:0.1H:2.4L:0.2H:2.2

16L:0.3H:2.4L:0.3H:1.9

17L:0.5H:2.3L:0.5

18H:1.7L:0.7H:2.2L:0.6

19🌓H:1.5L:0.8H:2.0L:0.6

20🌓H:1.3L:0.9H:1.9L:0.7

21🌓H:1.2L:0.9H:1.8

22🌓L:0.7H:1.2L:0.9H:1.9

23L:0.7H:1.3L:0.8H:1.9

24L:0.7H:1.4L:0.7H:2.1

25L:0.6H:1.5L:0.6H:2.2

26L:0.5H:1.7L:0.5H:2.2

27🌕L:0.4H:1.8L:0.4H:2.3

28🌕L:0.3H:2.0L:0.3H:2.3

29🌕L:0.3H:2.2L:0.3H:2.2

30L:0.3H:2.3L:0.3H:2.1

31L:0.3H:2.4L:0.3H:2.0

Best fishing times (solunar)

Major and minor solunar windows for Oceanographic Institution — peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).

Day	Major windows	Minor windows	Score
Today 🌗	4:53–6:53 AM 5:18–7:18 PM	10:11–12:11 AM 12:21–2:21 PM	34
Thu Aug 6 🌗	5:48–7:48 AM 6:13–8:13 PM	10:50–12:50 AM 1:39–3:39 PM	40
Fri Aug 7 🌗	6:48–8:48 AM 7:13–9:13 PM	— 2:55–4:55 PM	53
Sat Aug 8 🌘	7:52–9:52 AM 8:17–10:17 PM	11:41–1:41 AM 4:06–6:06 PM	66
Sun Aug 9 🌘	8:57–10:57 AM 9:22–11:22 PM	12:44–2:44 AM 5:05–7:05 PM	76
Mon Aug 10 🌘	10:00–12:00 PM 10:25–12:25 AM	1:56–3:56 AM 5:52–7:52 PM	85
Tue Aug 11 🌘	10:59–12:59 PM 11:24–1:24 AM	3:14–5:14 AM 6:30–8:30 PM	92

Predictions & observations: NOAA CO-OPS station 8447930. 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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