Portnancon tide times and boat scrubbing days
Portnancon is a UK Hydrographic Office tide station in Scotland at 58.500°, -4.700°. 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.
| Day | Tidal events | Scrubbing morning? |
|---|---|---|
| Fri 11 Sept | LW 02:57 (0.5 m) HW 09:00 (5.0 m) LW 15:01 (1.2 m) HW 21:06 (5.5 m) | ✅ Yes |
| Sat 12 Sept | LW 03:35 (0.5 m) HW 09:33 (5.1 m) LW 15:38 (1.1 m) HW 21:40 (5.5 m) | — |
| Sun 13 Sept | LW 04:12 (0.6 m) HW 10:04 (5.0 m) LW 16:14 (1.2 m) HW 22:13 (5.3 m) | — |
| Mon 14 Sept | LW 04:47 (0.9 m) HW 10:33 (4.9 m) LW 16:49 (1.3 m) HW 22:45 (5.1 m) | — |
| Tue 15 Sept | LW 05:19 (1.2 m) HW 11:02 (4.7 m) LW 17:21 (1.5 m) HW 23:17 (4.8 m) | — |
| Wed 16 Sept | LW 05:47 (1.6 m) HW 11:34 (4.5 m) LW 17:53 (1.8 m) HW 23:59 (4.5 m) | — |
| Thu 17 Sept | LW 06:16 (2.0 m) HW 12:16 (4.3 m) LW 18:29 (2.1 m) | — |
| Fri 18 Sept | HW 00:50 (4.1 m) | — |
Open the Portnancon monthly calendar
Planning a scrub at Portnancon
- 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.