The Ilulissat glacier fjord: navigating at the foot of a UNESCO-listed glacier

At the mouth of the Sermeq Kujalleq, icebergs accumulate in a chaos of ice before drifting towards the Atlantic. Some weigh several million tonnes. Navigating into the heart of the Ilulissat glacier fjord is to physically measure what 'glacier' really means.

The Ilulissat glacier fjord, a UNESCO World Heritage site since 2004, extends about 40 kilometres west of Greenland, not far from the town of Ilulissat, the country's third largest settlement. At its eastern end, the Sermeq Kujalleq — one of the fastest and most productive glaciers in the Northern Hemisphere — discharges an amount of ice equivalent to 46 cubic kilometres into the fjord each year. This figure is not an abstraction: it translates, at sea, into a density of icebergs unmatched outside Antarctica.

Disko Bay, into which the fjord flows, is one of the few places in the world where you can approach tabular icebergs several hundred metres high from a reasonably sized vessel. Navigation here requires caution and experience: the submerged masses of ice sometimes represent seven to eight times the volume visible above the surface. It is precisely this dimension — a landscape that commands respect without easily yielding — that makes Ilulissat a unique destination for an adventure cruise in Greenland.

The Sermeq Kujalleq: understanding the glacier that feeds the fjord

The Sermeq Kujalleq is what glaciologists call a calving glacier: it ends directly in the water, allowing it to calve icebergs almost continuously. Its calving front rises more than 80 metres above the water's surface, while the submerged part descends to depths of up to 600 metres in places. The glacier advances at a speed of about 20 to 25 metres per day, making it one of the most dynamic in the world. This productivity explains why the fjord remains permanently cluttered with ice, sometimes to the point of being impassable even for small vessels.

Glacial congestion is at its peak in early summer, when the winter ice of Disko Bay releases the icebergs accumulated since autumn. For an adventure cruise, the ideal window is between June and August: the sea ice is sufficiently reduced for navigation, the icebergs are still numerous, and the polar light offers exceptional photographic conditions. Understanding what one sees requires researching the mechanisms of calving and drift — a task that the Escales Polaires team prepares in advance, during onboard briefings, so that each passage in front of an iceberg is informative and not just spectacular. 

To go further in reading glacial landscapes, the article dedicated to observing glaciers in the Arctic offers useful references: HERE

Navigating in Disko Bay: what one experiences on board

Navigation in Disko Bay and around the glacial fjord of Ilulissat is coastal and insular navigation, conducted at a moderate pace in waters protected by the geographical configuration of the bay. 

From the M/S Tarmo or the M/S Isbjørnen II, the work of the officer on watch consists as much of reading the ice as of following a route. Icebergs drift, pivot, and sometimes turn over without warning: caution requires a safety distance that the zodiacs can then compensate for, approaching the ice masses more closely for the passengers.

Zodiac landings near the fjord provide access to high observation points, particularly from the ridges that overlook the mouth of the fjord on the south side. These walks allow for an overall perspective: the narrow fjord, the icebergs piled against each other for miles, and the blue-white line of the glacier in the background. The town of Ilulissat itself — with its colourful houses and lively port — can be the subject of a stopover, allowing for an encounter with contemporary Greenlandic culture in addition to the natural programme. The cruises in Greenland by Escales Polaires systematically articulate these two dimensions: landscape and human presence.

Marine wildlife and icebergs: what can be observed in Disko Bay

Disko Bay is renowned for the richness of its marine wildlife. The upwelling of cold nutrient-rich waters attracts krill and small fish, which in turn attract a complete food chain. The presence of humpback whales, minke whales, and narwhals is possible in these waters, particularly between June and August. 

These observations are never guaranteed — the Arctic wildlife moves according to the conditions — but the bay is among the most favourable areas in western Greenland for this type of encounters.

Seabirds are also well represented: Brünnich guillemots, three-toed gulls, and northern fulmars nest on the coastal cliffs and feed near the icebergs, where the mixing of the water promotes concentrations of prey. The ringed seal and the bearded seal can be seen lurking or swimming freely in the channels between the ice. For attentive passengers, these observations punctuate the navigation and give it an additional dimension, beyond just the mineral spectacle. Wildlife never puts on a show, which makes each appearance all the more memorable. Sea kayaking, when offered as an option, is the most silent and respectful way to move through this environment.

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