UK & Ireland Tide Predictions
Current Tide State
Falling tide
↓ Next: 3:09
Low in -1130h
This small Anglesey harbour lies on the island's north coast, where the Menai Strait meets the Irish Sea. Cemaes developed as a working fishing village, and that maritime heritage remains central to its character. The bay's shallow waters and rocky shoreline create distinctive tidal patterns worth monitoring for safe passage. Local boats still work from the harbour, supporting a genuine fishing community rather than a holiday resort. The surrounding landscape of moorland and coastal cliffs offers dramatic views, particularly during onshore swells when Atlantic weather systems arrive.
Next Tide
Low Tide
Time
3:09
Height
1.7m
Sun, 1 Mar 2026
Station ID:
gb-cemaes-bay
Region:
Wales North
Country:
United Kingdom
Continent:
Europe
Latitude:
53.416700°
Longitude:
-4.450000°
Timezone:
Europe/London
Abbreviation:
GMT
Local Time:
6:35
Last Updated:
2026-04-17T05:35:03.691Z
Data Source:
Live APIHeight Unit:
Meters (m)
Complete tidal predictions with Spring/Neap cycle analysis
Tidal Range
6.4m
Spring Tide
- Times shown in GMT
- Spring tides occur when sun and moon align, creating larger ranges
- Heights are relative to Chart Datum
- Weather conditions may affect actual tide levels
The tide chart above shows the height and times of high tide and low tide for Cemaes Bay. The red flashing dot shows the tide time right now. The grey shading corresponds to nighttime hours between sunset and sunrise at Cemaes Bay.
Tide Times are GMT.
Fri 23 Jan (height: 5.59m / 18.3ft)
Wed 04 Feb (height: 5.91m / 19.4ft)
Highest and lowest tide predictions for the week ahead
11:14
4 March 2026
6.8m
High Tide11:49
5 March 2026
6.8m
High Tide10:37
3 March 2026
6.7m
High Tide12:23
6 March 2026
6.6m
High Tide23:37
4 March 2026
6.5m
High Tide17:38
4 March 2026
0.5m
Low Tide17:03
3 March 2026
0.5m
Low Tide18:11
5 March 2026
0.6m
Low Tide16:24
2 March 2026
0.7m
Low Tide5:48
5 March 2026
0.7m
Low TideHighest Tide
6.8m
Lowest Tide
0.5m
Tidal Range
6.4m
Period
7 Days
The next high tide in Cemaes Bay is at 9:11 with a height of 6.07m. High tides occur approximately every 12 hours and 25 minutes due to the lunar cycle. Plan your beach visits, boating activities, and other marine pursuits around these peak water levels.
The next low tide in Cemaes Bay is at 3:09 with a height of 1.66m. Low tides alternate with high tides throughout the day, providing optimal times for beach activities and marine exploration. Use this chart to plan fishing trips, beach visits, boating activities, and other marine pursuits.
The tide chart above shows a 7-day forecast of tide heights for Cemaes Bay. The chart displays both high and low tides with precise times and heights in meters. You can use this chart to plan fishing trips, beach visits, boating activities, and other marine pursuits. The data is updated regularly from official tide monitoring stations to ensure accuracy for your location in United Kingdom.
| Date & Time | Height | Type |
|---|---|---|
1 March 2026 3:09 | 1.7m | Low |
1 March 2026 9:11 | 6.1m | High |
1 March 2026 15:41 | 1.1m | Low |
1 March 2026 21:43 | 5.9m | High |
2 March 2026 3:56 | 1.3m | Low |
2 March 2026 9:57 | 6.5m | High |
2 March 2026 16:24 | 0.7m | Low |
2 March 2026 22:25 | 6.3m | High |
3 March 2026 4:37 | 1.0m | Low |
3 March 2026 10:37 | 6.7m | High |
Cemaes Bay
Wales North
Latitude
53.416700°
Longitude
-4.450000°
Map Type
Street Map
Zoom Level
14x
Latitude
53.4167°
Longitude
-4.4500°
Timezone
Europe/London
Station ID
gb-cemaes-bay
This small Anglesey harbour lies on the island's north coast, where the Menai Strait meets the Irish Sea. Cemaes developed as a working fishing village, and that maritime heritage remains central to its character. The bay's shallow waters and rocky shoreline create distinctive tidal patterns worth monitoring for safe passage. Local boats still work from the harbour, supporting a genuine fishing community rather than a holiday resort. The surrounding landscape of moorland and coastal cliffs offers dramatic views, particularly during onshore swells when Atlantic weather systems arrive.. The tide predictions shown above cover 7 days of high and low tide times, updated daily using professional-grade harmonic tidal analysis. Tide heights are displayed in metres above Chart Datum (CD), the standard reference level used in marine navigation charts.
Tidal patterns at Cemaes Bay are driven by the gravitational forces of the Moon and Sun acting on the local ocean. The timing and height of each tide depends on the shape of the local coastline, water depth, and the position of celestial bodies relative to Earth. Like all coastal locations, Cemaes Bay experiences a full tidal cycle approximately every 24 hours and 50 minutes.
Spring tides — which occur at new moon and full moon — produce the largest tidal ranges at Cemaes Bay, with higher high tides and lower low tides than average. Neap tides, at the quarter moons, produce the smallest ranges. This fortnightly cycle is an important consideration for anyone planning coastal activities in the area.
Cemaes Bay is located in Anglesey, Wales North.
Fish are most active around tide changes, particularly the two hours either side of high and low water. Anglers targeting shore fish near Cemaes Bay use tide predictions to plan sessions when water movement is at its most productive.
Navigating in and out of harbours and estuaries near Cemaes Bay safely requires knowing the state of the tide. Sailors rely on these predictions to avoid running aground in shallow water and to time passage through tidal channels.
Many surf breaks and water sports venues near Cemaes Bay are tide-dependent. Certain breaks work only on a specific tide height, while kayaking and paddleboarding routes can be heavily affected by tidal currents and water depth.
Tidal beaches, coastal paths, and rock pools near Cemaes Bay are accessible only at certain tide states. Checking tide times before visiting ensures you don't get cut off by a rising tide, and helps you find the best time to explore exposed sand and rocky shores.
The tide chart above plots predicted water height (in metres) against time for Cemaes Bay. The curved line rises to peaks (high tide) and falls to troughs (low tide). The height shown is measured above Chart Datum — a reference level set near the lowest predicted astronomical tide level for the area.
All times shown are in the local timezone for Cemaes Bay (Europe/London). Remember that tide times advance by roughly 50 minutes each day, so always check the chart for your specific visit date.
Most coastal locations, including Cemaes Bay, experience two high tides and two low tides every 24 hours and 50 minutes — this is called a semidiurnal tidal pattern. Some regions experience one tide per day (diurnal), or a mixed pattern. The exact cycle for Cemaes Bay is shown in the chart above.
Astronomical tide predictions for Cemaes Bay are typically accurate to within 15–30 minutes and a few centimetres. However, actual water levels can vary due to weather — strong onshore winds raise sea levels, while offshore winds lower them. Storm surges and low atmospheric pressure can add significant height. Always treat predictions as a guide and check local conditions before heading to the coast.
Chart Datum (CD) is the reference level from which all tide heights at Cemaes Bay are measured. It is set close to the Lowest Astronomical Tide (LAT) — meaning tide heights are almost always positive numbers. Chart Datum is also the reference used on nautical charts for water depth, so mariners can add the predicted tide height to the charted depth to calculate the actual depth of water at any given time.
Tides are caused by the Moon's orbit around the Earth, which takes approximately 24 hours and 50 minutes to complete one tidal cycle. This means high and low tides at Cemaes Bay occur about 50 minutes later each day. Over a month, this adds up to a complete shift through the clock. The height of tides also changes through the monthly cycle between spring and neap tides.
Want to learn more about how tides work? Read our complete guide to tide times →