Churchill sits on Hudson Bay in northern Manitoba, accessible by plane or train, and its dive sites cover the Churchill River estuary, Button Bay, and more remote locations such as the Seal River Estuary. Water temperatures stay at or below freezing from November through June and reach only around ten degrees Celsius at peak in August, so drysuits are required at all sites throughout the year. Visibility varies sharply: the estuary carries silt and tannic acid that limits sightlines, while Button Bay offers clearer conditions. Beluga whales migrate into the bay and estuary during summer, making Churchill one of the few places where divers and snorkellers can encounter these animals underwater. Harbour seals, lumpfish, sea spiders, and pout are also recorded here. Most sites require boat access.
Monthly water temperature across Churchill's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water remains at or below freezing for most of the year and barely exceeds ten degrees Celsius even in August. Drysuits are non-negotiable. The summer beluga migration is the primary draw, and most operators run trips to coincide with it. Visibility in the estuary is persistently low due to silt and tannins; Button Bay offers more favourable conditions.
2 operators
Water temperature around Churchill ranges from about -1°C in January to 10°C in August, based on satellite sea-temperature data for its dive sites.
With water around -1–10°C, a drysuit works in Churchill year-round.
Fin maps 7 sites in Churchill (2 scuba diving sites and 5 snorkelling spots).
7 more sites to explore
