Topography and Climate Although The Hamptons and the North Fork are relatively close together, there are many climatic differences which exist between them. These differences are due to the unique topography of the eastern end of Long Island and the relation of the two forks to the Atlantic Ocean. Most of the climatic data for the eastern end of Long Island is recorded mainly from three weather stations: The Cornell Experimental Station in northern
Riverhead (located on the North Fork), the
Greenport weather station (located on the North Fork), and the Bridgehampton weather station in The Hamptons (located on the South Fork). The Cornell Station at Riverhead has been recording weather data since the 1950's, while the Bridgehampton Station has been operating for almost half a century. There are definite climatic differences which exist between the two forks. The
winter months are colder on the North Fork. There the colder temperatures average colder than The Hamptons. The reason is that the North Fork is further away from the Atlantic Ocean and hence does not receive the warmed southwest ocean winds that The Hamptons receive. In the winter, the prevailing winds from the southwest are warmed by the Atlantic Ocean. The ocean in the winter has a buffering effect due to its accumulation of heat from the summer and fall months. This wind will therefore buffer the temperature of The Hamptons as it passes over them, however, by the time the wind passes over the colder Peconic Bay and reaches the North Fork, it has lost much of its warmth and hence does little to buffer the temperatures of the North Fork. By the time
spring arrives on Long Island, the ocean has cooled somewhat from the low winter temperatures. Breezes coming from the south at this time of year will therefore become cooled by the ocean, and as they pass over the warming land, a
fog will often be produced. This fog will often become trapped on The Hamptons due to the many hills and rolling areas which exist there. Therefore, in the springtime, the North Fork will usually have more sunshine earlier and also have a higher average temperature. This is evident by the fact that the
strawberries,
sweet corn and
potatoes grown on the North Fork begin to grow and ripen earlier than those same
crops grown in The Hamptons. During the summer months the southern breezes coming off the cool ocean will continue to keep average temperatures of The Hamptons lower. As the winds pass over The Hamptons, they travel over the Peconic Bay, which is a smaller body of water and hence warmer. The winds absorb much of the warmth from the bay and therefore cause the average temperatures on the North Fork to be higher than The Hamptons during the summer months. During the summer, the North Fork receives a greater number of
thunder and
lightning storms. These storms usually arrive from the west, and are pushed over towards the North Fork by the prevailing southeast winds. During the fall, The Hamptons can also expect cooler temperatures than the North Fork, especially during the night. Otherwise, both forks have the benefit of enjoying a fall season consisting of a lot of sunshine and normal amounts of
precipitation. The ocean effect, which alters the climates of both the North and South Fork is considerably reduced west of Riverhead, where the island widens. It is this reason along with the increased blending of soil series, which would keep either fork from being considered part of a larger Long Island appellation. Although the amount of sunshine and rainfall can have an effect on the length of the growing season, the single most important factor is the number of days between the spring and fall frosts. In data taken from the Riverhead Station on the North Fork and from the Bridgehampton Station in The Hamptons (South Fork), there are definite differences in the frost dates for both forks. During the 6-year period from 1978-1983 the number of days between frosts, or the length of the growing season averaged 195 days on the North Fork and 182 days in The Hamptons. During those years there were anywhere from 1 to over 3 weeks less time for the growing season in The Hamptons as compared to the North Fork. When this data is further examined, it is seen that this difference occurs mostly between the dates of the last spring frost. The average last frost in The Hamptons is usually around April 23rd, while that on the North Fork occurs around the beginning of April. This spring difference is much greater than the difference between the first fall frosts, which usually occur during the end of October to the beginning of November on both forks. This supports the fact that the growing season gets off to a slower start in The Hamptons. The use of
heat summation of "
Growing Degree Days" is also another standard for determining climatic differences in grape-growing areas. Heat-summation is a standard developed by the
University of California at Davis, and it is the measurement of the mean monthly temperatures of a single area, above 500 F. The average number of degree days for the North Fork (at Riverhead) and The Hamptons (at Bridgehampton) are as follows:
Soils The soils which make up The Hamptons are distinctly different from those of the surrounding areas. The difference in soils occurs fairly abruptly, beginning at the
Peconic River and continues eastward to
Montauk Point. This also designates the northern boundary for "The Hamptons, Long Island" appellation. The predominant soil types which are found on the peninsula land north of The Hamptons, commonly known as the North Fork, are as follows: • Carver-Plymouth-Riverhead Association.These soils are excessively well-drained and are very
sandy. They are located primarily on the perimeter of the North Fork and are usually rolling or sloping in terrain. The natural fertility of these soils is low and the rapid permeability of water through them makes
irrigation a desirable option for vineyards in this area. • Haven-RiverheadAssociationThese soils are characteristically deep and somewhat level. They are well-drained and have a medium texture. Most of these soils have a moderate to high water holding capacity and crops respond well to
lime and
fertilizer when grown in these soils. Due to these factors, this soil association (which is the predominant one of the North Fork) is considered one of the best farming areas in Suffolk County. The soils of The Hamptons on the other hand are somewhat different and many more soil associations are present: • Plymouth-CarverAssociationThese soils are rolling, hilly, deep and excessively drained. Characteristically,
scrub oak and other minor trees are found as cover. Permeability is rapid and natural fertility is low. Most of these soils have never been farmed due to these factors and hence they are known to be poor supporters of crops. • Bridgehampton-HavenAssociation.These soils are deep and excessively drained and have a medium texture. It is its depth, good drainage and moderate to high available water-holding capacity that make this soil well-suited to farming. Most of these areas are currently under cultivation of potatoes and vegetables. These soils are the main reason why potato and vegetable growers in The Hamptons have consistently used less irrigation water than their North Fork counterparts. • Montauk-Montauk, Sandy variant-Bridgehampton Association. These soils are deep and usually very sloping. Its steep slopes, irregular topography and a high water table limit the potential of this area for conventional farming, but may be very suitable for supporting grapes. Presently, most of this area is either idle or wooded. • Montauk, Sandy Variant-Plymouth Association.These soils are excessively drained and coarse textured. Sloping areas within this association also limit conventional farming practices. This loamy-sand is droughty but contains a black surface layer which is high in organic matter content. There is no indication that grapes cannot be grown on these soils. • Montauk-Haven-Riverhead Association.These soils are fairly well-drained and are located mainly on the northern side of The Hamptons along the Peconic Bay. The surface layer is a silt loam, with a fine sandy loam found at deeper levels. These soils are very deep and well suited to cultivation. • Dune-Land-TidalMarsh-Beach Association.The remainder of the soils in The Hamptons consist of these types of soils which make up the beach and marshland areas, both of which are unsuitable for farming. As was previously stated, the soils of the North Fork and The Hamptons are quite different. At the Town of Riverhead where the forks meet, there is still some slight separation of the different soil associations. To the west of The Hamptons, the soil associations of Long Island tend to become less restricted to a distinct geographic area and much more intermingling and blending of soil series can be found. Along with this fact, there are the soils making up the "spine" of Long Island, known as the "
Pine Barrens." These "Pine Barrens" run east and west down the center of Long Island. The Pine Barrens are an untouched pine stand, one of the last wild areas on Long Island. The soils of the "Pine Barrens" can support only short scrubby
pine forests. This is the only vegetation found in the light, extremely sandy and unfertile soils found just west of The Hamptons. This land area is the major ground water recharge basin for Suffolk County. This area is presently being considered by New York State for preservation status, due to its importance for Long Island's water supply. Further west through Nassau County and into New York City, the soil associations become more foreign to those found on the eastern end of Long Island. Of major importance, it must also be pointed out that while various soil types found to the west of The Hamptons may be similar to those found there, the encroachment of dense suburban and industrial development on Long Island has made commercial agriculture and land available for it almost non-existent in the townships west of the viticultural area. The Hamptons contain a greater percentage of silt and loam than the soil series associations found on the North Fork. This accounts for the fact that The Hamptons soils have a greater water-holding capacity than North Fork soils and hence require less irrigation. == References ==