For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

COWES tide times and boat scrubbing days

COWES is a UK Hydrographic Office tide station in England at 50.767°, -1.300°. 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.

No high water falls between 06:30 and 09:00 in the next 7 days. The monthly calendar shows the next suitable scrubbing mornings.

Next 7 days of tidal events at COWES (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Fri 11 SeptHW 01:47 (4.1 m) LW 05:16 (0.7 m) HW 11:54 (4.4 m) HW 13:51 (4.4 m) LW 17:37 (0.8 m)
Sat 12 SeptHW 00:03 (4.4 m) HW 02:09 (4.2 m) LW 05:54 (0.6 m) HW 12:30 (4.4 m) HW 14:36 (4.4 m) LW 18:13 (0.7 m)
Sun 13 SeptHW 00:40 (4.4 m) HW 02:53 (4.2 m) LW 06:30 (0.6 m) HW 13:06 (4.4 m) HW 15:14 (4.4 m) LW 18:47 (0.8 m)
Mon 14 SeptHW 01:16 (4.3 m) HW 03:28 (4.2 m) LW 07:04 (0.8 m) HW 13:42 (4.4 m) HW 15:44 (4.3 m) LW 19:21 (0.9 m)
Tue 15 SeptHW 01:54 (4.2 m) HW 03:56 (4.1 m) LW 07:37 (1.0 m) HW 14:19 (4.3 m) HW 15:35 (4.2 m) LW 19:54 (1.1 m)
Wed 16 SeptHW 02:35 (4.1 m) HW 04:00 (4.0 m) LW 08:09 (1.2 m) HW 14:28 (4.1 m) HW 17:03 (4.0 m) LW 20:27 (1.3 m)
Thu 17 SeptHW 02:45 (3.9 m) HW 05:25 (3.8 m) LW 08:43 (1.5 m) HW 15:01 (3.9 m) HW 17:36 (3.8 m) LW 21:02 (1.6 m)

Open the COWES monthly calendar

Planning a scrub at COWES

  • 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.