The year at the mouth of the fjord
The climate figures are those of Baie-Comeau, on the same north shore. The scoring criterion is not temperature: it is what can be seen and whether boats are running.
There is a very specific point on the north shore of the St. Lawrence where the river stops being a river. It is the mouth of the Saguenay fjord, and something happens there that turns a stretch of cold water into one of the best places in the world to see cetaceans without going out to open sea.
The area has been protected as a marine park for years — 1,245 square kilometres, Canada's first park dedicated to a purely marine environment — and more than a thousand species of flora and fauna have been counted in it.
01 Why they gather here
The explanation is underwater. The fjord runs more than 105 kilometres long and reaches 275 metres deep, and where it empties it meets the estuary and a very uneven sea floor. That encounter forces a continuous upwelling of cold water from below.
The rising water brings nutrients, the nutrients feed plankton and the plankton concentrates krill and capelin in enormous quantities. That is why up to thirteen cetacean species turn up in a small area close to shore.
02 The ones that stay all year
Only two marine mammals live here all twelve months: the harbour seal and the St. Lawrence beluga. The latter is a population endemic to Canada, geographically and reproductively isolated from the rest of its species because it occupies the southern end of the species' range.
There are around 900 individuals and their situation is delicate. The population was listed as endangered in 1983, moved to threatened in 1997 and returned to endangered in 2014. Until the early 2000s it grew very slowly; since then it has been declining by around 1% a year.
This has a practical consequence for travellers: the beluga is not a species you can chase. It is protected and boats face restrictions on approaching it. Seeing one is possible, but as something that happens, not as something you book.
03 The season's two halves
The other species are visitors: minke whale, fin whale, blue whale, humpback, killer whale, harbour porpoise, dolphins and several more. And here is the nuance that is almost never explained: they do not all arrive in May and all leave in October.
Food is what rules. The concentration of krill and capelin takes weeks to build, and the largest animals — the ones that need higher prey densities for the journey to pay off — tend to show up once that concentration is in place, in the second half of summer and in autumn.
How the season divides up
Boats already running, empty villages and low prices. What you mostly see are minke whales, seals and, with luck, belugas. June adds 237 hours of sunshine and average highs of 18.3 degrees. If what you want is the coast and the fjord more than one particular animal, this is your moment.
The warmest month, with average highs of 21.3 degrees, and also the year's wettest: 110.8 millimetres across 15.7 days with precipitation. It coincides with the holidays, so accommodation needs booking ahead and sightings are still irregular.
Rain falls back to 81.9 millimetres, sunshine holds at 238 hours and the share of possible sunshine reaches 53.5%, the year's best. This is when the food concentration is in place and the odds of seeing large rorquals are highest.
September keeps the animals and empties the villages; on top of that the forest starts to change colour. The trade-off is light: sunshine hours fall from 238 in August to 163.8 in September and 123.4 in October, and the season ends around mid-October.
04 What the weather does
Even in a good month the day may not cooperate, and there is a figure worth internalising: the share of possible sunshine does not exceed 53.5% even in the year's best month. Translated: roughly half the daylight hours are cloudy even in August.
The other figure is about clothing. In the middle of August the average low is 9.9 degrees, and out on the water, moving, it feels considerably less. The clothes you need for an afternoon trip in summer are those of a cool autumn day on land.
05 Choosing the trip
There are two formats and they do not give the same experience. Fast inflatables get there sooner and move around more, but you are exposed and wearing a flotation suit. Larger boats are steadier, more comfortable and better if the sea is rough or if you are travelling with children or someone elderly.
And there is a third option almost nobody considers: staying on land. From several shoreline lookouts you can see cetaceans without boarding anything, free and without disturbing them. It is not as spectacular, but it works surprisingly well, and it is all that is left if the sea keeps the boats in port.
06 The months that do not work
From November to April there is no season. The figures explain it on their own: 342.9 centimetres of snow fall on this coast each year, January has a daily mean of −13.4 degrees and the recorded cold record drops to −47.2.
The belugas and seals are still there, but no boats go out to see them and the coast switches to another mode entirely. If your trip falls in those months, this is not the plan: change the objective and save the whales for another visit.
_and_Common_heather_(Calluna_vulgaris)_with_a_%22million%22_Highland_midges_(Culicoides_impunctatus)_in_the_background%2C_Locheynort%2C_Isle_of_South_Uist%2C_The_Outer_Hebrides%2C_Scotland.jpg?width=1600)
Thomas Andy Branson In the Highlands the calendar is not decided by the weather but by an insect
will standring In Tasmania the year's best spectacle happens at night and you have to look south
Daniel Lu