For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

Portmahomack tide times and boat scrubbing days

Portmahomack is a UK Hydrographic Office tide station in Scotland at 57.833°, -3.833°. 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 Portmahomack (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Fri 11 SeptLW 07:00 (0.5 m) HW 12:58 (4.1 m) LW 19:08 (1.0 m)
Sat 12 SeptHW 01:01 (4.3 m) LW 07:40 (0.4 m) HW 13:38 (4.1 m) LW 19:46 (0.9 m)
Sun 13 SeptHW 01:42 (4.3 m) LW 08:13 (0.5 m) HW 14:16 (4.1 m) LW 20:18 (0.9 m)
Mon 14 SeptHW 02:24 (4.3 m) LW 08:45 (0.7 m) HW 14:50 (4.0 m) LW 20:48 (1.0 m)
Tue 15 SeptHW 03:00 (4.1 m) LW 09:13 (1.0 m) HW 15:19 (3.8 m) LW 21:18 (1.2 m)
Wed 16 SeptHW 03:31 (3.9 m) LW 09:42 (1.3 m) HW 15:48 (3.7 m) LW 21:51 (1.4 m)
Thu 17 SeptHW 04:06 (3.6 m) LW 10:14 (1.6 m) HW 16:20 (3.5 m) LW 22:30 (1.7 m)

Open the Portmahomack monthly calendar

Planning a scrub at Portmahomack

  • 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.