TidalMap

Boston Tide Times

Massachusetts · Station 8443970 · live gauge · Updated Aug 5, 2026

Boston runs a mean tidal range of about 9.1 ft. This month the highest water, 11.4 ft, comes on the evening of Aug 12, and the lowest, a -0.9 ft minus tide, on the morning of Aug 13.

7.6 ftobserved 2:36 PM

Next high tide 10.3 ft at 4:48 PM

PredictedObserved

Monthly tide calendar

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

🌊 Biggest flood tides at Boston this month: Aug 9, Aug 10, Aug 11, Aug 12, Aug 14, Aug 15. 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 Boston this month: Aug 10, Aug 11, Aug 12, Aug 13, Aug 14, Aug 15, Aug 16, Aug 31. These drain the flats and expose the oyster rock — prime for sight-fishing and clamming.

August 2026

Sun

Mon

Tue

Wed

Thu

Fri

Sat

1H:10.2L:0.2H:9.5L:0.8

2H:10.1L:0.2H:9.7L:0.7

3H:9.9L:0.3H:10.0L:0.6

4H:9.7L:0.5H:10.1L:0.6

5🌗H:9.4L:0.7H:10.3L:0.6

6🌗H:9.1L:0.9H:10.4

7🌗L:0.5H:8.9L:1.1H:10.4

8L:0.4H:8.7L:1.1H:10.6

9L:0.3H:8.8L:1.0H:10.8

10L:-0.1H:9.1L:0.8H:11.1

11L:-0.4H:9.5L:0.4H:11.3

12🌑L:-0.7H:9.9L:0.0H:11.4

13🌑L:-0.9H:10.3L:-0.2

14🌑H:11.3L:-0.8H:10.5L:-0.3

15🌑H:11.1L:-0.6H:10.5L:-0.2

16H:10.6L:-0.2H:10.4L:0.1

17H:10.1L:0.4H:10.2L:0.4

18H:9.5L:1.0H:9.9L:0.8

19🌓H:8.9L:1.5H:9.6L:1.2

20🌓H:8.4L:2.0H:9.3

21🌓L:1.5H:8.0L:2.3H:9.1

22🌓L:1.7H:7.9L:2.4H:9.1

23L:1.7H:7.9L:2.3H:9.2

24L:1.5H:8.1L:2.1H:9.5

25L:1.2H:8.5L:1.8H:9.8

26L:0.8H:8.8L:1.4H:10.0

27🌕L:0.5H:9.2L:1.0H:10.2

28🌕L:0.3H:9.6L:0.6

29🌕H:10.3L:0.1H:9.9L:0.3

30H:10.3L:0.1H:10.2L:0.1

31H:10.2L:0.1H:10.4L:-0.0

Best fishing times (solunar)

Major and minor solunar windows for Boston — 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 🌗	4:55–6:55 AM 5:20–7:20 PM	10:10–12:10 AM 12:25–2:25 PM	34
Thu Aug 6 🌗	5:50–7:50 AM 6:15–8:15 PM	10:49–12:49 AM 1:44–3:44 PM	40
Fri Aug 7 🌗	6:50–8:50 AM 7:15–9:15 PM	— 3:01–5:01 PM	53
Sat Aug 8 🌘	7:53–9:53 AM 8:18–10:18 PM	11:39–1:39 AM 4:11–6:11 PM	66
Sun Aug 9 🌘	8:58–10:58 AM 9:23–11:23 PM	12:41–2:41 AM 5:10–7:10 PM	76
Mon Aug 10 🌘	10:01–12:01 PM 10:26–12:26 AM	1:54–3:54 AM 5:57–7:57 PM	85
Tue Aug 11 🌘	11:00–1:00 PM 11:25–1:25 AM	3:13–5:13 AM 6:34–8:34 PM	92

Predictions & observations: NOAA CO-OPS station 8443970. 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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