The average height of a large wave can vary significantly depending on various factors, such as the location, weather conditions, and the type of waves being considered (e.g., ocean waves, tidal waves, or surf waves). Additionally, the term "large wave" is subjective and can mean different things to different people.
However, I can provide some general information regarding the average heights of certain types of waves:
Ocean Waves: In the context of ocean waves, the average height is often described in terms of significant wave height. Significant wave height is defined as the average height of the highest one-third of waves in a given wave system. The average significant wave height in the open ocean can range from about 1 to 3 meters (3 to 10 feet) under normal conditions. However, during stormy weather or extreme conditions, significant wave heights can exceed 10 meters (33 feet) or more.
Tidal Waves: Tidal waves, also known as tidal bores or tidal surges, occur when the tidal flow enters a narrow channel or river mouth, causing a large wave to propagate upstream. The height of tidal waves can vary greatly depending on the specific location and tidal conditions. In some cases, tidal waves can reach several meters in height.
Surf Waves: Surf waves are the waves that break near the shoreline and are commonly associated with surfing. The average height of surf waves depends on factors such as the swell size, wind conditions, and the beach or reef configuration. On an average day at a typical surf spot, the wave heights can range from around 0.5 to 2 meters (1.5 to 6 feet). However, during large swells or storm events, surf waves can reach heights of 3 meters (10 feet) or more.
Remember that these figures are general estimates, and actual wave heights can deviate significantly based on specific conditions and locations. It's important to consult local surf reports, weather forecasts, or relevant authorities for more accurate and up-to-date information regarding wave heights in a particular area.