For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

Rona tide times and boat scrubbing days

Rona is a UK Hydrographic Office tide station in Scotland at 59.133°, -5.817°. 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.

4 mornings in the next 7 days have a high water between 06:30 and 09:00, the ideal window to put a boat on the scrubbing grid or posts: Sun 8 Nov, Mon 9 Nov, Tue 10 Nov, Wed 11 Nov.

Next 7 days of tidal events at Rona (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Thu 5 NovHW 04:35 (2.6 m) LW 10:34 (1.1 m) HW 16:38 (2.9 m) LW 23:06 (0.4 m)—
Fri 6 NovHW 05:22 (2.8 m) LW 11:16 (0.9 m) HW 17:29 (3.0 m) LW 23:44 (0.3 m)—
Sat 7 NovHW 06:02 (2.9 m) LW 11:54 (0.7 m) HW 18:13 (3.1 m)—
Sun 8 NovLW 00:19 (0.3 m) HW 06:39 (3.0 m) LW 12:31 (0.6 m) HW 18:53 (3.1 m)✅ Yes
Mon 9 NovLW 00:52 (0.4 m) HW 07:13 (3.0 m) LW 13:07 (0.5 m) HW 19:31 (3.1 m)✅ Yes
Tue 10 NovLW 01:25 (0.5 m) HW 07:46 (3.1 m) LW 13:43 (0.5 m) HW 20:07 (3.0 m)✅ Yes
Wed 11 NovLW 01:58 (0.6 m) HW 08:17 (3.0 m) LW 14:19 (0.6 m) HW 20:42 (2.9 m)✅ Yes

Open the Rona monthly calendar

Planning a scrub at Rona

  • 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.