New Brunswick, the gateway to Atlantic Canada. From whale-watching to fishing, and camping, the moderate climate here offers year round activities for the outdoor enthusiasts. Among the most popular tourist spots are Magnetic Hill, the reversing falls of Saint John, and the Flowerpot Rocks on the Bay of Fundy. New Brunswick has two national parks, Fundy and Kouchibouguac. In addition, some 48 provincial parks and recreation areas allow for camping in nearly every part of the province.

The province's major rivers and its many smaller streams radiate outward from the interior highlands. The most important stream, the St. John River, rises in Maine and flows southeast to the Bay of Fundy. The extremely high tides of the Bay of Fundy flow upstream, causing the famous phenomenon known as the reversing falls of Saint John. Other major rivers include the Restigouche, which has headwaters in the Chaleur Uplands and empties into Chaleur Bay, and the Miramichi, which cuts across the Maritime Plain to its outlet on the Gulf of St. Lawrence. Many small lakes and a few larger ones occur in the glaciated upland regions. The largest natural lake is Grand Lake, which is only 7 ft above sea level, even though it is more than 43 mi from the open sea.

The north half of New Brunswick has a distinctly continental climate, with cold winters and warm summers. The south half has a more moderate maritime climate, with milder winters and slightly cooler summers. The average annual temperature ranges from 2.8° C (37° F) in the north to 5° C (41° F) in the south. Precipitation is fairly evenly distributed throughout the year. Fog is common in the spring and early summer along the Bay of Fundy coast.