Low pressure = wind = waves. Here's a rough guide to understanding low pressure. Isobars make shapes and patterns. When they enclose an area of low pressure they are called a 'low' or 'depression'.

In meteorology, high pressure always flows to low pressure - but the difference ... On the weather map, the pressure lines or “isobars” will be drawn very close together.

while the isobar marked 976 represents an area of low pressure. Not only do isobars tell us whether there is high or low pressure but they also tell us about wind: When the isobars are closer ...