Devon

Devon's south coast runs the western English Channel from the Dorset border at Lyme Regis around Start Point to Plymouth Sound at the Cornish line. The tide signature here is macrotidal-leaning: mean range about 4.2 metres at Plymouth, climbing close to 5 metres on spring tides, neaps dropping near 2.4. The pattern is semidiurnal, two highs and two lows about twelve and a half hours apart. Plymouth Sound is one of the great natural harbours of the south-west, ringed by the Royal Navy breakwater across its mouth, and the Tamar and the Plym both feed into it on each flood. The rocky shelf at Wembury south-east of Plymouth is one of the better intertidal zones on the coast, opening up on the lowest spring tides for tide pooling. The Tinside sea pool at the foot of the Hoe fills from the tide and rewards the higher half of the cycle. UK Hydrographic Office Admiralty TotalTide is the authoritative British tide product; the gridded predictions on this site are useful for daily planning but not for piloting.