Twice a day, roughly 160 billion tonnes of seawater sweep in and out of the Bay of Fundy — and in Southwest New Brunswick, that daily rhythm dictates what you can do on land and water. Hike the ocean floor at low tide, paddle beneath sea arches at high, and come winter, ski across the same coastline that was open water months earlier.

The historic seaside town of Saint Andrews By-the-Sea makes a natural base. It sits beside one of the planet's most productive marine ecosystems, and the surrounding area packs a lot into a small footprint. The 40-kilometre Lighthouse Trail is the marquee trek, marked by working lighthouses as it threads past cliffs, volcanic rock formations and waterfalls. Shorter and steeper is the forested climb up Chamcook Mountain, a green hike in summer that converts to a snowshoe route once the snow settles. Around Saint George, quiet forest paths near Charlotte County's lakes are so under-visited you're likelier to meet deer, moose or falcons than another hiker.

On the water, the options span from gentle to genuine workout. Sea kayakers can paddle under a carved arch on Grand Manan Island or weave through the islets of Passamaquoddy Bay. The St Croix International Waterway traces the Canada–US border through forested shores, secluded islands and wetlands, mixing slow, loon-soundtracked paddling with Class I to III rapids. Anglers get both worlds: saltwater species like mackerel, pollock and cod offshore, plus bass, pickerel, catfish and more in the Magaguadavic River and county lakes — with solid ice fishing once winter locks things up.

Wildlife is the headline act. Humpbacks, fin whales and the rare North Atlantic right whale pass through these waters, and campers on Grand Manan or Campobello Island can hear the unmistakable exhale of whales in the night.

Winter is the sleeper season. The region turns, as the locals put it, into a snow globe: cross the ocean floor on foot by timing the tides, or ski the gentle coastal loop on Minister's Island, a place you can only reach at low tide. The same coastline delivers a completely different sport depending on the month.

Who it suits: self-directed travellers who like their adventures tide-dependent and crowd-free — hikers, paddlers, anglers and wildlife watchers happy to trade big infrastructure for raw coastline. It's an easy add-on to a Maritime Canada road trip, and the two-season appeal means summer and winter trips here barely overlap.