National Network of Regional Coastal Monitoring Programmes

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Note that these are real-time data and are not quality-controlled. Long-range graphs are plotted from a randomised subsample of half-hourly data.

Port Isaac

Tide Levels and Harmonics

 


Latest Tide Data (Predicted Tide Table)

Time (GMT)ElevationResidual
13-12-2025 15:503.61-0.19
 Next HWNext LW
00:36, 5.87 18:34, 2.54
Date Highest 2025 Date Lowest 2025
05-11 8.38m 30-03 -0.05m

Port Isaac Predicted Tide Table (Chart Datum)

13-12-202514-12-202515-12-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High12:00
6.12m
High00:36
13:04
5.87m
6.08m
High01:40
14:04
5.97m
6.15m
Low05:51
18:34
2.60m
2.54m
Low06:56
19:35
2.61m
2.50m
Low07:57
20:31
2.51m
2.36m
16-12-202517-12-202518-12-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High02:36
14:57
6.19m
6.30m
High03:24
15:44
6.44m
6.48m
High04:07
16:25
6.68m
6.64m
Low08:51
21:20
2.32m
2.17m
Low09:39
22:03
2.10m
1.98m
Low10:21
22:41
1.90m
1.81m