TidalMap

South Yarmouth, Bass River Tide Times

Massachusetts · Station 8447504 · Updated Aug 5, 2026

South Yarmouth, Bass River runs a mean tidal range of about 2.6 ft. This month the highest water, 3.3 ft, comes on the morning of Aug 13, and the lowest, a -0.3 ft minus tide, on the morning of Aug 13.

Nearest gauge measuring live water level: Chatham Harbor, Aunt Lydias Cove (8447435), about 12 mi away — high and low tides here run on average about 44 min later.

Predictedno live gauge

Next high tide 3.0 ft at 6:36 PM

Predicted

Monthly tide calendar

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

🌊 Biggest flood tides at South Yarmouth, Bass River this month: Aug 9, Aug 10, Aug 12, 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 South Yarmouth, Bass River 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:3.0L:0.1H:2.8L:0.2

2H:2.9L:0.1H:2.8L:0.2

3H:2.9L:0.1H:2.9L:0.2

4H:2.8L:0.1H:2.9

5🌗L:0.2H:2.7L:0.2H:3.0

6🌗L:0.2H:2.6L:0.3H:3.0

7🌗L:0.2H:2.6L:0.3H:3.0

8L:0.1H:2.5L:0.3H:3.1

9L:0.1H:2.6L:0.3H:3.1

10L:-0.0H:2.6L:0.2H:3.2

11L:-0.1H:2.8L:0.1

12🌑H:3.3L:-0.2H:2.9L:0.0

13🌑H:3.3L:-0.3H:3.0L:-0.1

14🌑H:3.3L:-0.2H:3.0L:-0.1

15🌑H:3.2L:-0.2H:3.1L:-0.1

16H:3.1L:-0.1H:3.0L:0.0

17H:2.9L:0.1H:3.0L:0.1

18H:2.7L:0.3H:2.9

19🌓L:0.2H:2.6L:0.4H:2.8

20🌓L:0.4H:2.4L:0.6H:2.7

21🌓L:0.4H:2.3L:0.7H:2.6

22🌓L:0.5H:2.3L:0.7H:2.6

23L:0.5H:2.3L:0.7H:2.7

24L:0.4H:2.4L:0.6H:2.8

25L:0.3H:2.5L:0.5

26H:2.8L:0.2H:2.6L:0.4

27🌕H:2.9L:0.2H:2.7L:0.3

28🌕H:3.0L:0.1H:2.8L:0.2

29🌕H:3.0L:0.0H:2.9L:0.1

30H:3.0L:0.0H:3.0L:0.0

31H:3.0L:0.0H:3.0L:-0.0

Best fishing times (solunar)

Major and minor solunar windows for South Yarmouth, Bass River — 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 🌗	4:51–6:51 AM 5:16–7:16 PM	10:08–12:08 AM 12:20–2:20 PM	34
Thu Aug 6 🌗	5:46–7:46 AM 6:11–8:11 PM	10:48–12:48 AM 1:37–3:37 PM	40
Fri Aug 7 🌗	6:46–8:46 AM 7:11–9:11 PM	— 2:54–4:54 PM	53
Sat Aug 8 🌘	7:50–9:50 AM 8:15–10:15 PM	11:38–1:38 AM 4:04–6:04 PM	66
Sun Aug 9 🌘	8:55–10:55 AM 9:20–11:20 PM	12:41–2:41 AM 5:04–7:04 PM	76
Mon Aug 10 🌘	9:58–11:58 AM 10:23–12:23 AM	1:54–3:54 AM 5:51–7:51 PM	85
Tue Aug 11 🌘	10:57–12:57 PM 11:22–1:22 AM	3:11–5:11 AM 6:28–8:28 PM	92

Predictions & observations: NOAA CO-OPS station 8447504. 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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