Sussex

Sussex sits on the central English Channel coast between Hampshire to the west and Kent to the east. The tide here is the moderate Channel signal: cleanly semidiurnal, two highs and two lows of comparable size each day, twelve and a half hours apart. Mean range at Brighton is about 4 metres, climbing past 5 on spring tides and dropping near 2.6 on neaps. The classic Sussex shoreline alternates between the white chalk of the Seven Sisters and Beachy Head, the shingle and pebble of Brighton, Eastbourne, and the long banks at Camber, and the wide sand of West Wittering and the Manhood Peninsula at the western end of the county. The shingle steepens fast under the tidal swing — a metre of vertical change covers ten or fifteen metres of beach width — so cold-water swimming groups, paddle-boarders, and sailors out of Chichester Harbour and Brighton Marina each read the table for different windows. The Channel's tide signal is well-resolved by harmonic prediction, and UK Hydrographic Office Admiralty TotalTide is the authoritative product. Open-Meteo's gridded predictions on this site are useful for daily planning but not for piloting.