Best Time for a Mostraumen Fjord Cruise: Weather, Waterfalls & Winter Sailings

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From May to September, with daylight well into the evening, there is time to pair the cruise with a full-day trip to Flåm and the UNESCO-listed Nærøyfjord, a glacier-lake day in Folgefonna National Park, or the Ulriken cable car above Bergen. In winter the short days suit shorter trips like the Mostraumen cruise itself. The tours below are all bookable from the city.

The Mostraumen cruise month by month

If the cruise is one part of a wider Bergen trip, the long, mild days from May to August are also the easiest time for walking the city and its mountains; winter is a very different trip, with short days, frequent rain and a much smaller choice of tours. On the fjord itself, the number of departures, the daylight and the look of the mountainsides change a great deal between seasons. The notes below say what each part of the year is like on the water.

January to March: winter sailings

Each operator sails once a day, in the morning, and the boats are back in Bergen by early afternoon. Days are short, from about 6½ hours of daylight in mid-January to 11½ hours by mid-March, and Bergen’s average highs are only about 5 to 7°C. Snow falls often on the mountains around the city and around the fjord, while the city itself usually gets rain; Bergen has snow on the ground on about 7 to 9 days in an average January or February. On the coldest days the brackish water at the head of the fjord can freeze, and the captain then chooses another route. January is the quietest month of the year for overnight visitors in Bergen.

April: the second sailing returns

From April the operators add an afternoon departure. Days pass 14 hours by mid-month, average highs reach about 11°C, and rain falls on about 14 days, a little less often than in winter. Easter can fill departures even this early in the year, although the city is still far quieter than in summer.

May and June: less rain and snowmelt

May is the driest month in Bergen, with about 109 mm of rain on 13 days, against 290 mm in December. By mid-May the days last about 17 hours, and in June almost 19; around midsummer the sky never gets fully dark, although the sun does set. As the snow clears from the mountains in late spring, the meltwater feeds the waterfalls along the fjord. Average highs are about 15°C in May and 18°C in June, cooler than July and August, and June is busier in Bergen than May: the Bergen International Festival runs from late May into June, and the cruise-ship season is in full swing.

July and August: the most departures

The operators run their fullest timetables, with three departures a day from both Rødne and Guided Fjord Tours, including a 5 p.m. sailing that returns in the long evening light. Average highs are about 19 to 20°C, the warmest of the year, but rain becomes more frequent, with about 158 mm in July and 208 mm in August. These are the busiest months for overnight visitors in Bergen, the traditional Norwegian common holiday falls in July, and June to August is the port’s cruise-ship high season. After a long spell of dry, sunny weather the smaller waterfalls can shrink.

September and October: autumn colour and heavy rain

September still has two departures a day with all three operators, and the fjord sides start to turn red and yellow as autumn arrives. It is also the start of the wettest part of the year: about 248 mm of rain on 17 days in September, and 268 mm in October, when the waterfalls are often at their fullest after rain. Days shorten quickly, from about 13 hours in mid-September to about 10 in mid-October. September is not quieter than May in Bergen: overnight stays in the two months are almost the same.

November and December: short days and Christmas

One departure a day again, with daylight down to about 7½ hours in mid-November and under 6 hours in mid-December, when the sun sets at about 3:30 p.m. The morning departures still return in daylight. November and December are among the wettest months, and Bergen’s Christmas market runs from late November to just before Christmas. Departures around Christmas can sell out, and Fjordcharter does not sail on December 24.

Rain is the average total for the whole month, with the number of days that get at least 1 mm. It says nothing about how many hours it rained: a month with a few stormy days and a month of light showers can total the same, and in Bergen a wet day often still has dry spells. May’s 109 mm is well under half of December’s 290 mm. The temperatures are averages for the city, not a promise about your day, and the inner fjord is usually a little colder in winter.

Which cruise suits your month

All three catamaran cruises follow much the same route: out of Bergen harbour, up the 27-kilometre Osterfjord and through the narrow Mostraumen strait towards Modalen, where the boat noses up to a waterfall, then back, in about 3 to 3½ hours. There is no stop ashore. The differences are the departure quay, the departure times and the size of the boat.

Rødne’s original Mostraumen cruise leaves from Zachariasbryggen by the Fish Market, sails daily all year, and has the most departure times in summer; it is rated 4.7 out of 5 from 10,371 reviews. Rødne is the only operator that already publishes its departures for all of 2027. Fjordcharter’s cruise with a live guide leaves from the same quay at 11 a.m., with a 3 p.m. sailing added from April to September, and is rated 4.7 from 2,993 reviews. Guided Fjord Tours’ Mostraumen cruise leaves from Strandkaien 13 on a smaller boat carrying fewer than 100 passengers, rated 4.6 from 4,490 reviews, and in July and August it adds the 5 p.m. evening sailing. Our full breakdown of the cruises →

The Mostraumen RIB safari is a different kind of trip: 2½ hours on an open, fast boat with no cabin, wearing a flotation suit, rated 4.8 from 178 reviews. Its operator says it runs year-round, although Visit Bergen lists it on Fridays to Sundays only from November 2026. On a cold or wet day the enclosed catamarans are the more comfortable choice. RIB or catamaran? →

Waterfalls through the year

The waterfall the boat approaches, and the dozens you pass on the way, are fed mainly by rain, and the operators say they get bigger on rainy days. After heavy rain the falls are at their most dramatic, and from the heated cabin you can watch them without getting soaked.

Snowmelt adds to them in late spring. Fjord Norway, the regional tourism board, says the region’s waterfalls are “never bigger than in May and June”, when the snow clears from the mountains. In western Norway the biggest river floods come with the autumn rain, not the spring melt, which is why the waterfalls can also be at their fullest from September to December. The smaller streams shrink after a long spell without rain, and in July 2026 some travellers found the waterfall “dry” after two weeks of sun. No one publishes a flow record for the cruise’s waterfall, so treat its size on any given day as a matter of recent weather.

Winter sailings and ice on the fjord

The cruises run all winter, with one departure a day from each operator: Rødne at 10 a.m., Guided Fjord Tours at 10:30 a.m. and Fjordcharter at 11 a.m. The indoor cabins are heated, and Rødne describes them as “well heated, even during the coldest days of winter”. The open decks are cold once the boat is moving, so bring a warm, windproof layer, a hat and gloves.

Ice is possible and never certain. At the head of the fjord fresh river water mixes with seawater, and on the coldest days this brackish water can freeze. The operators then take another route. Guided Fjord Tours’ own terms say a route change for ice gives no refund on tickets bought directly from it; a GetYourGuide booking can be cancelled free up to 24 hours before departure. Visit Bergen says ice can occasionally stop the boat reaching Mostraumen itself, and that this typically happens only a handful of times each year; Fjordcharter says the fjord freezes more rarely now than it once did. Snow on the mountainsides is far more common than ice on the water. Our winter cruise guide covers what a winter trip is like on board.

Daylight and the best departure time

Bergen is about 690 km south of the Arctic Circle, so it has no midnight sun, but around midsummer the sun sets after 11 p.m. and the sky does not get fully dark. From April to September every scheduled departure, including the 5 p.m. summer sailing, comes back in daylight, so choose the time that suits the rest of your day. Late October is the exception: after the clocks go back on the last Sunday of the month, Rødne’s 2 p.m. departure, which its timetable lists into October, returns after sunset, so take the morning sailing if you want the whole route in daylight.

In winter the single morning departures fit the short days: even in mid-December, when the sun rises at about 9:40 a.m. and sets at about 3:30 p.m., a 10, 10:30 or 11 a.m. departure is back before sunset. The sun stays low all day in December and January, and the steep fjord sides can keep parts of the water in shade. The date checker above shows sunrise and sunset for your date and flags any departure that would return after dark.

Weather on the fjord

The boats sail in most weather. Rødne says it runs “every day, rain or shine”, and all three operators have heated indoor cabins with large windows, open decks and a kiosk, so rain changes where you sit rather than whether you see the fjord. It can even help: the waterfalls get bigger on rainy days. The operators can change the route or, in genuinely dangerous weather, cancel; Fjordcharter says that happens only in rare cases of extreme weather.

Low cloud is the bigger problem for the views: it can hide the upper mountains and flatten the scenery even when the cruise runs normally. It is also usually windier on the open water than in Bergen’s streets, and on a windy day the open deck can feel much colder than the city forecast. The inner fjord lies about 48 km from central Bergen, among mountains up to about 1,200 m, and nearby stations suggest it is often colder than Bergen in winter and at least as wet. MET Norway publishes no monthly wind average for the fjord, so this page gives none; the date checker shows the forecast gusts for your day instead. For packing, Bergen’s average highs are about 5°C from December to February and about 18 to 20°C from June to August, and the open deck feels colder than either.

How busy Bergen gets

August and July are the busiest months for overnight visitors in Bergen, with about three times January’s guest nights. May and September sit close together, well below the summer peak, and January is the quietest month. The summer peak is mostly visitors from abroad; overnight stays by Norwegian guests change much less through the year.

These figures count people staying in Bergen’s hotels, hostels, campsites and cabin villages, not passengers on the boats, day visitors or cruise-ship passengers who sleep on board. Read them as a guide to how busy the city is. Bergen’s port allows at most four cruise ships and 8,000 cruise passengers a day, and the port calls June, July and August its high season. Visit Bergen says some fjord departures sell out, particularly in summer and around Christmas and Easter, so book ahead for those dates. Bergen’s schools have their autumn break on October 5–9, 2026 and their winter break on March 1–5, 2027.

Frequently asked questions

Sources and methodology