Difference Between Neap Tide and Spring Tide

Tides are an important feature of the earth’s oceans and seas, and the cycle of their rise and fall can vary significantly over time. The difference between neap and spring tides is one of the most fundamental aspects of understanding their behaviour. Neap and spring tides are distinguishable by the strength of their rise and fall, which differs based on the alignment of the sun, moon and earth.

What is a Neap Tide?

A neap tide occurs when the moon and sun are at right angles to each other, resulting in a smaller difference between high and low tide heights. During this phase, tides occur relatively close together with low tide coming two hours before or after high tide. Neap tides are the most predictable since they occur at the same time each month.

Neap tides also have a much lower tidal range than normal, so the difference between the high and low tides is not as large and the ocean levels remain relatively constant throughout the day.

What is a Spring Tide?

A spring tide happens when the moon and sun are lined up in the same direction. This causes high tide to reach its highest level, with the tidal range being at its peak. Spring tides occur twice a month, around the times of the new and full moon. The strength of spring tides can have a significant impact on shorelines, as the tidal range is increased substantially.

Spring tides occur when the difference between high and low tide is the greatest and often cause areas to flood in low lying locations. This type of tide is known as a “King Tide” in parts of the world.