For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

Castlebay tide times and boat scrubbing days

Castlebay is a UK Hydrographic Office tide station in Scotland at 56.950°, -7.483°. This page lists the next 7 days of official Admiralty high and low water predictions and flags the mornings when high water falls in the 06:30 to 09:00 scrubbing window. The interactive calendar extends this to a full month with harmonic predictions.

One morning in the next 7 days has a high water between 06:30 and 09:00, the ideal window to put a boat on the scrubbing grid or posts: Wed 11 Nov.

Next 7 days of tidal events at Castlebay (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Thu 5 NovHW 03:07 (3.6 m) LW 09:05 (1.5 m) HW 15:20 (3.9 m) LW 21:48 (1.1 m)—
Fri 6 NovHW 03:55 (3.8 m) LW 09:55 (1.3 m) HW 16:06 (4.1 m) LW 22:31 (0.9 m)—
Sat 7 NovHW 04:34 (4.0 m) LW 10:39 (1.2 m) HW 16:46 (4.2 m) LW 23:08 (0.9 m)—
Sun 8 NovHW 05:10 (4.2 m) LW 11:20 (1.0 m) HW 17:24 (4.2 m) LW 23:45 (0.9 m)—
Mon 9 NovHW 05:44 (4.3 m) LW 11:58 (1.0 m) HW 18:00 (4.1 m)—
Tue 10 NovLW 00:19 (0.9 m) HW 06:18 (4.3 m) LW 12:35 (1.0 m) HW 18:32 (4.0 m)—
Wed 11 NovLW 00:52 (1.0 m) HW 06:46 (4.2 m) LW 13:10 (1.1 m) HW 19:02 (3.9 m)✅ Yes

Open the Castlebay monthly calendar

Planning a scrub at Castlebay

  • Aim for a high water between 06:30 and 09:00 so the boat dries out through the morning and refloats on the afternoon flood.
  • Spring tides (around new and full moon) give a larger range and more working time on the grid.
  • Check the height of high water against the depth of your grid or posts; neap tides may not float a deep-keeled yacht on.
  • Predictions beyond 7 days are harmonic estimates. Confirm dates against official tide tables before committing a crane or grid booking.