Clifford Bay is a large, open coastal bay on the northeastern coast of New Zealand's South Island, situated south of Cloudy Bay. It is a significant marine feature influenced by the outflow of the Awatere River. The bay is characterized by its exposed coastline, dominated by the prominent White Bluffs, which are sheer cliffs offering little opportunity for landing and with breakers that can extend well offshore. The coastline transitions to a shallow sloping beach at Marfell Beach, where a Department of Conservation campground is located. This beach can be difficult to identify from the water until close to shore. Other potential shoreline access points include Flemings Road and Cable Station Road.

Paddling in Clifford Bay is an advanced undertaking due to significant and dynamic wind exposure. Conditions can change rapidly, with winds lifting from 10 to 25-30 knots in a short period. Strong easterlies and northerlies are common, and significant gusts are frequently forecast. The bay has a long fetch, leading to wave heights that can require considerable experience. Water temperatures are consistently cold, averaging between 10.5°C and 11.7°C, presenting a year-round risk of hypothermia. Tidal currents are present, with a northerly flow noted during a transit, which can slow progress. The combination of wind, waves, and cold water defines this as a challenging environment suitable only for well-prepared, experienced paddlers with appropriate safety gear.

A notable route is a transit from Cloudy Bay, past White Bluffs, across Clifford Bay to Marfell Beach. This is an open-water crossing requiring careful navigation, with Cape Campbell serving as a key landmark. The area is used by motorhomes and campers at Marfell Beach. The aesthetic is one of a rugged, dynamic coastline with limited shelter.