For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

Amlwch tide times and boat scrubbing days

Amlwch is a UK Hydrographic Office tide station in Wales at 53.417°, -4.333°. 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.

2 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: Thu 5 Nov, Fri 6 Nov.

Next 7 days of tidal events at Amlwch (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Thu 5 NovLW 01:32 (1.7 m) HW 07:40 (6.4 m) LW 13:49 (2.1 m) HW 19:50 (6.8 m)✅ Yes
Fri 6 NovLW 02:24 (1.5 m) HW 08:27 (6.6 m) LW 14:39 (1.8 m) HW 20:38 (7.0 m)✅ Yes
Sat 7 NovLW 03:09 (1.4 m) HW 09:06 (6.8 m) LW 15:22 (1.6 m) HW 21:19 (7.1 m)—
Sun 8 NovLW 03:47 (1.3 m) HW 09:42 (7.0 m) LW 16:00 (1.5 m) HW 21:57 (7.1 m)—
Mon 9 NovLW 04:23 (1.3 m) HW 10:17 (7.1 m) LW 16:37 (1.4 m) HW 22:34 (7.0 m)—
Tue 10 NovLW 04:58 (1.4 m) HW 10:51 (7.1 m) LW 17:14 (1.5 m) HW 23:11 (6.9 m)—
Wed 11 NovLW 05:31 (1.6 m) HW 11:26 (7.0 m) LW 17:49 (1.6 m) HW 23:47 (6.7 m)—

Open the Amlwch monthly calendar

Planning a scrub at Amlwch

  • 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.