Tides

Generated by 192.168.0.4

This page links to graphs showing the tides at a number of locations for a range of periods.

• Dartmouth, Devon
  • 3 days   •   7 days   •   14 days   •   28 days
  
  
• Leith, Edinburgh
  • 3 days   •   7 days   •   14 days   •   28 days

The following graph shows the layout used.

• this graph covers a three day period
• dates are shown on the horizontal axis along top of the graph
• times, at 4 hour intervals, are shown along the bottom of the graph
• the current date-time is indicated by a vertical red line
• the time the graph was generated is shown in red in the bottom left corner
• the location the graph was produced for is also shown in the bottom left corner
• the vertical axis shows the tide height in metres
• the heights (high and low) of the Mean Spring Tide are shown as horizontal red lines
• the heights (high and low) of the Mean Neap Tide are shown as horizontal blue dotted lines
• the tidal coefficient is shown along the centre of the graph
  • The tidal coefficient is the tide's amplitude divided by the average Spring tide amplitude expressed as a percentage
  • A very big Spring tide can have a coefficient of 120%, and a very low Neap tide a coefficient of around 20%
• the tidal level itself is shown by the sinuous blue line
• the shaded areas indicate the periods when the sun is set
• the moon icons show the phases of the moon
  • Spring tides occur a few days after New and Full moons
  • Neap tides occur a few days after the first and third quarter (when half of the moon is visible)