For UK boat owners

Scrubbing off Calendar

Monthly view • Harmonic predictions • Boat scrubbing day finder

Porth Ysgaden tide times and boat scrubbing days

Porth Ysgaden is a UK Hydrographic Office tide station in Wales at 52.900°, -4.650°. 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: Fri 6 Nov, Sat 7 Nov, Sun 8 Nov, Mon 9 Nov.

Next 7 days of tidal events at Porth Ysgaden (UK local time, heights in metres above Chart Datum)
DayTidal eventsScrubbing morning?
Thu 5 NovLW 00:27 (1.3 m) HW 06:14 (3.9 m) LW 12:44 (1.6 m) HW 18:23 (4.2 m)—
Fri 6 NovLW 01:17 (1.1 m) HW 06:58 (4.1 m) LW 13:31 (1.4 m) HW 19:08 (4.4 m)✅ Yes
Sat 7 NovLW 01:59 (1.0 m) HW 07:34 (4.2 m) LW 14:12 (1.2 m) HW 19:46 (4.4 m)✅ Yes
Sun 8 NovLW 02:36 (0.9 m) HW 08:08 (4.4 m) LW 14:49 (1.1 m) HW 20:21 (4.5 m)✅ Yes
Mon 9 NovLW 03:10 (1.0 m) HW 08:40 (4.4 m) LW 15:24 (1.0 m) HW 20:56 (4.4 m)✅ Yes
Tue 10 NovLW 03:44 (1.0 m) HW 09:12 (4.5 m) LW 16:00 (1.1 m) HW 21:30 (4.3 m)—
Wed 11 NovLW 04:17 (1.2 m) HW 09:45 (4.4 m) LW 16:35 (1.2 m) HW 22:04 (4.2 m)—

Open the Porth Ysgaden monthly calendar

Planning a scrub at Porth Ysgaden

  • 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.