For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

Narlwood Rocks tide times and boat scrubbing days

Narlwood Rocks is a UK Hydrographic Office tide station in England at 51.650°, -2.600°. 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: Fri 11 Sept.

Next 7 days of tidal events at Narlwood Rocks (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Fri 11 SeptLW 03:50 (0.1 m) HW 08:36 (11.7 m) LW 16:08 (0.0 m) HW 20:53 (12.1 m)✅ Yes
Sat 12 SeptLW 04:35 (-0.1 m) HW 09:17 (11.9 m) LW 16:51 (-0.0 m) HW 21:33 (12.2 m)
Sun 13 SeptLW 05:14 (-0.0 m) HW 09:55 (11.8 m) LW 17:28 (0.1 m) HW 22:09 (11.9 m)
Mon 14 SeptLW 05:47 (0.2 m) HW 10:28 (11.4 m) LW 17:58 (0.3 m) HW 22:40 (11.3 m)
Tue 15 SeptLW 06:11 (0.5 m) HW 10:56 (10.8 m) LW 18:16 (0.6 m) HW 23:07 (10.6 m)
Wed 16 SeptLW 06:21 (0.8 m) HW 11:20 (10.2 m) LW 18:27 (0.8 m) HW 23:30 (9.9 m)
Thu 17 SeptLW 06:33 (0.9 m) HW 11:43 (9.4 m) LW 18:44 (1.0 m) HW 23:55 (9.0 m)

Open the Narlwood Rocks monthly calendar

Planning a scrub at Narlwood Rocks

  • 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.