Air temperature There is a high correlation between swimming and maximum air temperature and a fairly high correlation between beach use and maxi mum air temperature.
AMount and intensity of the wind and sun. There is a weak inverse relationship between both swimming and beach use and wind. There is a straight-line correlation between sunshine hours and both swimming and beach use. The correlation is higher than that of maximum air temperature for beach use and lower than for swimming.
Water temperatures, including the temperature range
Cuments, tides, and waves, including their direction, strength, and seasonally. Wave action, and the corresponding erosion, is greater when beaches are exposed to the main channel of a lake. On the other hand, beaches developed on lakes are subject to less erosion when placed on the side of a bayor inlet.
Ecology, including seaweed and fish.
Pollution. In Jersey, the largest of the English Channel lslands, stateoltheart sewage treatment plants use ultraviolet light radiation to destroy bacteria and microorganisms before they pass into the sumounding waters.
Clarity of water. Of the 496 coastal resorts around bathing destinations on the northwest coast ol England, 89 percent passed germ tests and only 146 met standards that are above average for bathing waters.