In , the three core cities were inhabited by , people, while the Tricity together with its metropolitan area had a combined population of between 1 and 1. The designation has been used informally or semi-formally only. The total population in was 1,,, in an area of 1, Tricity has a temperate climate with warm summers and mild winters. Rain is possible all year round.
Autumns are warmer than springs due to the warming effect of the adjacent Baltic Sea. Winters are wet, windy and mild, compared to the interior of Poland. Sea temperatures have been rising significantly during last decades prolonging the summer season to five months in recent years. Tricity has a number of professional teams, which compete in basketball , volleyball , speedway , handball , rugby union and football.
There is a third top-flight Polish rugby team Ogniwo Sopot , making the Tricity Poland's rugby capital. Arka also fields a men's and women's professional basketball team while Trefl Sopot is the other men's professional basketball club in the Tricity. The Tricity has a well-developed traffic infrastructure and public transport system. In , the Tricity Beltway was constructed. The backbone of the Tricity is the inner highway.
It consists of lanes in each direction. The variety and number of public bus lines and coach connections facilitates the travel around the Tricity and surrounding areas. One of the most popular means of transport in the Pomerania province is the public coach. The high number of bus lines covers every quarter of the three cities within the metropolis. In addition to usual buses, Gdynia also operates trolleybuses which reach Sopot. The rapid transit rail network has achieved since its inception in a unifying effect on the metro area formerly divided by a frontier, by linking the connected localities with a frequent and reliable service.
More recently, a pre-war railway destroyed in by the retreating German army has been reconstructed as the The primary SKM line has been served by overhead-powered electrical multiple units since its inauguration, while the PKM line is currently serviced by oil-powered units, though it is scheduled for imminent electrification. The area is well connected to the rest of the Pomerania region, as well as Poland and the rest of Europe.
