Bardsey Island tide times
Gwynedd, Wales
Times shown in UK local time, currently BST.
Tuesday 26th August, 2025
Jump to today →The moon and tides at Bardsey Island
Waxing crescent
11% illuminated, waxing
The moon is a waxing crescent, 11% lit and growing. The next first quarter is in 5 days, on Sunday 31 August.
The moon's monthly cycle drives the size of the tides here. Around the new moon and full moon, the sun and moon line up so their gravity adds together, producing the largest swing between low and high. Those are spring tides. Around the first and last quarter, the sun and moon pull at right angles and partly cancel out, producing the smallest swing. Those are neap tides.
Bardsey Island Tide Clock
Next High Tide
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Next Low Tide
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The hand sweeps once around the dial each tidal cycle, about 12 hours and 25 minutes. Navy numbers mark the next high water. Orange numbers mark the next low. The tide is rising while the hand moves from low towards high, and falling on the way back.
Tides at Bardsey Island run on a twice-daily rhythm, with two highs and two lows most days. The bigger fortnightly cycle that controls how large each swing gets is covered in the spring and neap tides guide.
Bardsey Island Tide Times
Jump to today →No tide data available for this period.
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 Bardsey Island page flags spring and neap days automatically when one is selected in the calendar.
Tide Curve for Bardsey Island
Next 7 days, segmented by day
No tide data available for this period.
The chart plots the predicted water level at Bardsey Island 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.
Bardsey Island Location
52.7602, -4.7899
Bardsey Island sits at 52.7602°N, 4.7899°W, on the coast of Gwynedd, Wales. 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 Bardsey Island
- Aberdaron, 6.6 km NE
- Abersoch, 20 km E
- St. Tudwal's Roads, 22 km E
- Saint Tudwals Islands, 22 km E
- Porth Dinlläen, 27 km NE
- Nefyn, 27 km NE
For a same-day comparison, look at tide times for Aberdaron, Abersoch, or St. Tudwal's Roads. The shape of the cycle is usually similar to Bardsey Island, 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.
About tides at Bardsey Island
Bardsey Island sits on the coast of Gwynedd, Wales. Tide times here follow the local pattern. All heights on this page are measured from chart datum, the lowest the water normally falls.
Common questions about Bardsey Island tide times
- When is the next high tide at Bardsey Island?
- The next high tide is shown in the panel at the top of the page, with the exact time and predicted height in metres above chart datum. Today's full set of tide times is in the table below the calendar.
- How big is the tidal range at Bardsey Island?
- Tidal range varies day to day with the lunar cycle. Spring tides give the biggest swing between low and high water, neap tides the smallest.
- What time zone are these tide times in?
- Times follow UK local time, so they are GMT in winter and BST through the summer.
- Why does high tide happen at a different time each day?
- Tides follow the moon, not the sun. The moon takes about 24 hours and 50 minutes to come back to the same point overhead, so each high water happens roughly 50 minutes later than the day before.
- Can I use these tide times for sailing or coastal planning?
- No. These are astronomical predictions for general reference and educational use only. Don't rely on this site, or any tide table, for sailing, navigation, swimming, fishing, or any decision where the water level matters for safety. Use official sources and a current marine forecast instead.