Derry tide times

The panel at the top of the page shows the next four turns of the tide for whichever date is selected in the calendar. Each row is one extreme: a "High" or "Low", the time it happens in local time, and the predicted height in metres above chart datum.

The 7 days tab lays the next week out as columns, one per day, with each day's tides stacked top to bottom in the order they happen. The 30 days tab switches to a calendar-row layout for planning further ahead. Both pick up from whatever date the calendar is on.

Tides at most UK ports are semidiurnal: two highs and two lows roughly twelve hours and twenty-five minutes apart. A few stations have a double high water (Poole and Southampton are the well-known ones) or a much smaller secondary peak. If a day in the table only shows three turns instead of four, it's because one of them sat just outside midnight at one end of the day.

The size of the swing between low and high changes through the month, following the spring and neap cycle. The Derry page flags spring and neap days automatically when one is selected in the calendar.

The chart plots the predicted water level at Derry as a smooth curve over the next seven days. Each peak is a high water; each trough is a low water. The shaded bands separate days, and a faint "now" marker shows where the current time falls along the curve.

Hover the chart and a tracker line snaps to the nearest hour, with a tooltip giving the exact time and height. The numbers on the left axis are the height in metres above chart datum, on the same scale as the values in the tide table.

Weeks where the peaks are tall and the troughs deep are spring tides. Weeks where the curve bunches towards the middle are neaps. Predictions are computed from astronomical constituents, so the same shape carries forward as far as the data allows.

Derry sits at 54.9981°N, 7.3093°W, on the coast of Derry and Strabane, Northern Ireland. The marker comes from the tide station coordinates rather than the town centre, so the prediction lines up with the bit of coastline the data is for.

Nearest tide stations to Derry

• Portstewart, 43 km NE
• Coleraine, 44 km E
• Portrush, 48 km NE
• Ballycastle, 71 km E
• Ballycastle Bay, 72 km E
• Cushendall, 80 km E

For a same-day comparison, look at tide times for Portstewart, Coleraine, or Portrush. The shape of the cycle is usually similar to Derry, but the time of high water and the tidal range can shift noticeably along even short stretches of coast.

Browse the full list at UK tide locations for another port, harbour, or beach.