High and low water times and heights at Holyhead

Tidal predictions

Tidal predictions are available for the next 28 days. For information beyond this period, please consider using the POLTIPS·3 software package, available for purchase from the Applications Team.

Times in GMT, heights in metres above chart datum. For times in BST, add one hour.
Predictions DO NOT include meteorological effects.
(H - high water, L - low water)

© National Oceanography Centre, Liverpool
Mon 22nd Sep 201403:09 1.30m L 09:18 5.14m H 15:16 1.43m L 21:28 5.42m H 
Tue 23rd03:40 1.11m L 09:48 5.32m H 15:46 1.23m L 21:58 5.56m H 
Wed 24th04:09 0.99m L 10:17 5.45m H 16:15 1.08m L 22:28 5.64m H 
Thu 25th04:39 0.93m L 10:46 5.54m H 16:46 1.00m L 23:00 5.67m H 
Fri 26th05:09 0.93m L 11:18 5.57m H 17:18 1.00m L 23:32 5.63m H 
Sat 27th05:40 0.99m L 11:51 5.55m H 17:51 1.06m L 
Sun 28th00:06 5.54m H 06:13 1.11m L 12:26 5.47m H 18:28 1.19m L 
Mon 29th00:42 5.39m H 06:50 1.28m L 13:05 5.33m H 19:09 1.37m L 
Tue 30th01:24 5.19m H 07:33 1.51m L 13:51 5.14m H 20:00 1.59m L 
Wed 1st Oct 201402:15 4.94m H 08:29 1.78m L 14:48 4.93m H 21:04 1.80m L 
Thu 2nd03:24 4.71m H 09:42 2.01m L 16:03 4.79m H 22:25 1.88m L 
Fri 3rd04:54 4.62m H 11:07 2.03m L 17:29 4.85m H 23:49 1.72m L 
Sat 4th06:22 4.79m H 12:26 1.81m L 18:45 5.11m H 
Sun 5th01:00 1.38m L 07:30 5.10m H 13:29 1.45m L 19:44 5.45m H 
Mon 6th01:59 0.98m L 08:22 5.41m H 14:21 1.08m L 20:34 5.78m H 
Tue 7th02:48 0.64m L 09:07 5.68m H 15:07 0.75m L 21:19 6.03m H 
Wed 8th03:32 0.41m L 09:48 5.86m H 15:51 0.53m L 22:03 6.17m H 
Thu 9th04:15 0.32m L 10:30 5.95m H 16:33 0.43m L 22:46 6.18m H 
Fri 10th04:57 0.37m L 11:12 5.93m H 17:16 0.49m L 23:30 6.04m H 
Sat 11th05:39 0.57m L 11:54 5.80m H 18:00 0.68m L 
Sun 12th00:15 5.78m H 06:21 0.88m L 12:36 5.59m H 18:45 0.98m L 
Mon 13th00:59 5.44m H 07:03 1.25m L 13:18 5.32m H 19:33 1.34m L 
Tue 14th01:45 5.07m H 07:49 1.65m L 14:04 5.03m H 20:26 1.70m L 
Wed 15th02:37 4.71m H 08:42 2.04m L 14:59 4.75m H 21:28 2.02m L 
Thu 16th03:42 4.42m H 09:47 2.35m L 16:09 4.55m H 22:45 2.18m L 
Fri 17th05:04 4.30m H 11:09 2.48m L 17:32 4.52m H 
Sat 18th00:02 2.13m L 06:28 4.40m H 12:26 2.38m L 18:47 4.67m H 
Sun 19th01:06 1.93m L 07:28 4.64m H 13:24 2.14m L 19:39 4.91m H 
Prediction chart

UK & Ireland


While every effort has been made to ensure the accuracy of the information provided, no responsibility can be accepted by the Natural Environment Research Council for any consequential loss or damage arising from its use.