TidalMap

Plum Island Sound (south end) Tide Times

Massachusetts · Station 8441241 · Updated Aug 5, 2026

Plum Island Sound (south end) runs a mean tidal range of about 8.5 ft. This month the highest water, 10.5 ft, comes on the morning of Aug 13, and the lowest, a -0.7 ft minus tide, on the morning of Aug 13.

Nearest gauge measuring live water level: Seavey Island (8419870), about 26 mi away — high and low tides here run on average about 13 min later.

Predictedno live gauge

Next high tide 9.6 ft at 5:15 PM

Predicted

Monthly tide calendar

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

🌊 Biggest flood tides at Plum Island Sound (south end) this month: Aug 8, Aug 9, Aug 10, Aug 11, Aug 13, 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 Plum Island Sound (south end) this month: Aug 10, Aug 11, Aug 12, Aug 13, Aug 14, Aug 15, Aug 16. 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:9.3L:0.4H:8.6L:0.8

2H:9.2L:0.3H:8.9L:0.7

3H:9.1L:0.4H:9.2L:0.5

4H:8.9L:0.5H:9.4L:0.4

5🌗H:8.7L:0.6H:9.6L:0.3

6🌗H:8.4L:0.8H:9.7

7🌗L:0.3H:8.2L:0.9H:9.8

8L:0.2H:8.1L:0.9H:10.0

9L:0.0H:8.2L:0.8H:10.2

10L:-0.2H:8.4L:0.5H:10.3

11L:-0.4H:8.7L:0.2H:10.5

12🌑L:-0.6H:9.0L:-0.0

13🌑H:10.5L:-0.7H:9.3L:-0.2

14🌑H:10.4L:-0.7H:9.6L:-0.3

15🌑H:10.1L:-0.5H:9.7L:-0.2

16H:9.7L:-0.2H:9.7L:-0.1

17H:9.3L:0.2H:9.5L:0.2

18H:8.8L:0.6H:9.3L:0.5

19🌓H:8.3L:1.0H:9.1L:0.8

20🌓H:7.9L:1.4H:8.8

21🌓L:1.1H:7.5L:1.7H:8.6

22🌓L:1.2H:7.3L:1.8H:8.5

23L:1.3H:7.3L:1.8H:8.6

24L:1.2H:7.3L:1.7H:8.7

25L:1.0H:7.5L:1.5H:8.9

26L:0.9H:7.8L:1.3H:9.0

27🌕L:0.7H:8.1L:1.0H:9.2

28🌕L:0.5H:8.5L:0.7

29🌕H:9.3L:0.4H:8.9L:0.4

30H:9.3L:0.3H:9.3L:0.2

31H:9.3L:0.3H:9.6L:0.0

Best fishing times (solunar)

Major and minor solunar windows for Plum Island Sound (south end) — 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	10:07–12:07 AM 12:25–2:25 PM	34
Thu Aug 6 🌗	5:49–7:49 AM 6:14–8:14 PM	10:46–12:46 AM 1:44–3:44 PM	40
Fri Aug 7 🌗	6:49–8:49 AM 7:14–9:14 PM	— 3:01–5:01 PM	53
Sat Aug 8 🌘	7:52–9:52 AM 8:17–10:17 PM	11:36–1:36 AM 4:12–6:12 PM	66
Sun Aug 9 🌘	8:57–10:57 AM 9:22–11:22 PM	12:39–2:39 AM 5:11–7:11 PM	76
Mon Aug 10 🌘	10:00–12:00 PM 10:25–12:25 AM	1:52–3:52 AM 5:57–7:57 PM	85
Tue Aug 11 🌘	10:59–12:59 PM 11:24–1:24 AM	3:10–5:10 AM 6:34–8:34 PM	92

Predictions & observations: NOAA CO-OPS station 8441241. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.

Open Plum Island Sound (south end) on the live chart →

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