High and low water times and heights at St. Mary's
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 Marine Data Products 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
Sun 5th
Feb 202304:42
5.22m H11:09
1.25m L17:00
5.09m H23:18
1.25m L
Feb 202304:42
5.22m H11:09
1.25m L17:00
5.09m H23:18
1.25m L
Mon 6th05:15
5.34m H11:42
1.13m L17:32
5.19m H23:49
1.14m L
5.34m H11:42
1.13m L17:32
5.19m H23:49
1.14m L
Tue 7th05:46
5.42m H12:12
1.06m L18:03
5.23m H
5.42m H12:12
1.06m L18:03
5.23m H
Wed 8th00:19
1.08m L06:17
5.44m H12:42
1.04m L18:33
5.23m H
1.08m L06:17
5.44m H12:42
1.04m L18:33
5.23m H
Thu 9th00:50
1.07m L06:47
5.41m H13:12
1.07m L19:03
5.18m H
1.07m L06:47
5.41m H13:12
1.07m L19:03
5.18m H
Fri 10th01:21
1.13m L07:18
5.33m H13:43
1.17m L19:34
5.09m H
1.13m L07:18
5.33m H13:43
1.17m L19:34
5.09m H
Sat 11th01:54
1.25m L07:49
5.20m H14:15
1.32m L20:08
4.95m H
1.25m L07:49
5.20m H14:15
1.32m L20:08
4.95m H
Sun 12th02:28
1.43m L08:25
5.01m H14:52
1.53m L20:47
4.77m H
1.43m L08:25
5.01m H14:52
1.53m L20:47
4.77m H
Mon 13th03:09
1.65m L09:08
4.79m H15:37
1.76m L21:36
4.57m H
1.65m L09:08
4.79m H15:37
1.76m L21:36
4.57m H
Tue 14th04:03
1.88m L10:05
4.54m H16:40
1.97m L22:45
4.39m H
1.88m L10:05
4.54m H16:40
1.97m L22:45
4.39m H
Wed 15th05:20
2.04m L11:24
4.35m H18:08
2.06m L
2.04m L11:24
4.35m H18:08
2.06m L
Thu 16th00:15
4.39m H06:53
1.97m L12:59
4.41m H19:36
1.89m L
4.39m H06:53
1.97m L12:59
4.41m H19:36
1.89m L
Fri 17th01:42
4.64m H08:16
1.65m L14:21
4.70m H20:50
1.54m L
4.64m H08:16
1.65m L14:21
4.70m H20:50
1.54m L
Sat 18th02:51
5.06m H09:23
1.21m L15:24
5.09m H21:49
1.13m L
5.06m H09:23
1.21m L15:24
5.09m H21:49
1.13m L
Sun 19th03:48
5.50m H10:18
0.78m L16:17
5.46m H22:41
0.76m L
5.50m H10:18
0.78m L16:17
5.46m H22:41
0.76m L
Mon 20th04:38
5.87m H11:07
0.45m L17:04
5.73m H23:27
0.49m L
5.87m H11:07
0.45m L17:04
5.73m H23:27
0.49m L
Tue 21st05:24
6.11m H11:52
0.26m L17:48
5.86m H
6.11m H11:52
0.26m L17:48
5.86m H
Wed 22nd00:11
0.36m L06:06
6.18m H12:35
0.25m L18:29
5.84m H
0.36m L06:06
6.18m H12:35
0.25m L18:29
5.84m H
Thu 23rd00:53
0.39m L06:48
6.08m H13:15
0.40m L19:08
5.69m H
0.39m L06:48
6.08m H13:15
0.40m L19:08
5.69m H
Fri 24th01:33
0.57m L07:27
5.83m H13:54
0.70m L19:45
5.43m H
0.57m L07:27
5.83m H13:54
0.70m L19:45
5.43m H
Sat 25th02:12
0.89m L08:06
5.46m H14:33
1.09m L20:24
5.10m H
0.89m L08:06
5.46m H14:33
1.09m L20:24
5.10m H
Sun 26th02:51
1.28m L08:46
5.04m H15:11
1.52m L21:06
4.74m H
1.28m L08:46
5.04m H15:11
1.52m L21:06
4.74m H
Mon 27th03:35
1.71m L09:32
4.60m H15:57
1.93m L21:57
4.38m H
1.71m L09:32
4.60m H15:57
1.93m L21:57
4.38m H
Tue 28th04:32
2.10m L10:33
4.20m H17:01
2.27m L23:14
4.12m H
2.10m L10:33
4.20m H17:01
2.27m L23:14
4.12m H
Wed 1st
Mar 202305:59
2.33m L12:03
3.99m H18:38
2.39m L
Mar 202305:59
2.33m L12:03
3.99m H18:38
2.39m L
Thu 2nd00:54
4.11m H07:38
2.26m L13:38
4.08m H20:06
2.22m L
4.11m H07:38
2.26m L13:38
4.08m H20:06
2.22m L
Fri 3rd02:12
4.35m H08:48
1.98m L14:42
4.36m H21:06
1.92m L
4.35m H08:48
1.98m L14:42
4.36m H21:06
1.92m L
Sat 4th03:05
4.67m H09:36
1.66m L15:28
4.66m H21:48
1.62m L
4.67m H09:36
1.66m L15:28
4.66m H21:48
1.62m L
Disclaimer
While every effort has been made to ensure the accuracy of the information provided, no responsibility can be accepted by the National Oceanography Centre for any consequential loss or damage arising from its use.