St Ives, Cornwall tide times

The hero block shows the next high tide at St Ives in local UK time (GMT in winter, BST in summer). The 7-day table covers all the highs and lows. High water at St Ives is close to in-phase with Newquay further down the north coast and arrives about an hour ahead of the Bristol Channel ports further east.

Mean range is about 4.5 metres, climbing past 6.5 metres on the largest spring tides and dropping near 2.5 metres on neaps. The pattern is cleanly semidiurnal — two highs and two lows of comparable size each day, twelve and a half hours apart, the standard north Cornish signal. The Hayle estuary across the bay drains almost completely on each ebb.

Open-Meteo Marine, a gridded global ocean model. Useful for daily planning around St Ives Bay, the Hayle estuary, and the open Atlantic coast. For authoritative British tide data, the UK Hydrographic Office's Admiralty TotalTide product is the navigation-grade reference, and the National Tide and Sea Level Facility operates the gauge network.

The rocky shore around the Island (the headland north-west of the harbour) and the cliff base east of the harbour both open up reliably on the lowest tides of the month, around new and full moons when the predicted low drops below 0.5 metres above chart datum. The granite intertidal at the western tip of Cornwall is among the best in southern England — go an hour either side of the lowest predicted low and stay above the rising flood.

No. For piloting in or out of St Ives Harbour, transiting the Hayle bar, or working the open Atlantic coast use UKHO Admiralty charts and TotalTide predictions, the local harbour-master's guidance, and the Falmouth Coastguard's notices to mariners. The Hayle bar in particular is a working hazard at low water and in onshore swell.