The average tide in Gloucester Harbor is about 10 feet, or a little over 3 meters.
 
• Use the arrows to change the Max. Height Change to 3 m.
Storms can cause surges of sea level, on top of the tide. In the Great New England Hurricane of 1938, storm surge was as much as 15 feet (5 meters)
 
• Set Storm Height to 5 m, set duration as long as you like, and then check the box next to the day. Watch the animation and the tide chart!
 
 
This animation was created by Interactive Earth for the NOAA Ocean Data Education Project.
The phase of the moon affects the height of the tides: when the moon is full or new, tides are greater (this is called a "spring tide"). When the moon is in the first or third quarter (half full), the tides are smaller ("neap tide")
 
• Note the Lunar Phase in the upper right corner, and how it affects the height of the tide on the graph.
In Massachusetts, sea level is projected to rise between 1.3 and 3.1 feet (0.4 - 0.9 m) by 2050, and between 4 and 10 feet (1.2 - 3.0 m) by 2100.
 
• Increase Sea Level Rise by 1.5 m in the bottom slider. How does this affect the tide? What happens if you add a storm?