The Iceland calendar at a glance
- Cruise season
- Late May to early September
- Puffins ashore
- Mid-May to mid or late August
- Midnight sun
- Around the June solstice
- Northern Lights
- Late September to late March
- Ice caves
- Natural caves roughly October to March
- Highland F-roads
- Roughly late June to September, 4x4 required by law
What Is the Best Time to Visit Iceland?
June and July if you want to sail: the whole coast is navigable, puffins are on the cliffs and the light barely fades. Late September to March if you want the Northern Lights and ice caves, which is a road trip rather than a voyage. The two do not overlap.
| Season | Climate and sea | Wildlife and highlights | What you can do |
|---|---|---|---|
| Peak summer, June to August | Mildest air, 10 to 15°C; calmest seas; near-continuous daylight | Puffins nesting at Látrabjarg and Hafnarhólmi; humpback, minke and blue whales; arctic foxes in Hornstrandir | Full circumnavigations, Zodiac fjord landings, crossing the Arctic Circle at Grímsey |
| Shoulder, May and September | Crisp and variable, 3 to 10°C; quieter; autumn colour in September | Migratory seabird arrivals in May; late-season whale feeding; first aurora from late August | Coastal fjord voyages, hiking, geothermal bathing, early dark-sky aurora attempts |
| Winter and spring, October to April | Cold and snowy, -2 to 4°C; short daylight; rougher seas | Active Northern Lights; natural glacier ice caves under Vatnajökull; snow-covered volcanoes | Land touring, geothermal spas, ice caves, localised coastal excursions — not circumnavigations |
Temperatures are typical ranges rather than guarantees. Aurora and wildlife are never certain in any month.
We have used both ends of the calendar. Our circumnavigation aboard the Ocean Diamond ran from 27 May to 5 June 2022, which put puffins on the cliffs and gave us Zodiac outings still in daylight late in the evening. Our ten-day land tour in April 2023 was a different country: snow still on the ground at the waterfalls, quiet roads, no aurora season left to speak of.
What Is Summer Like for a Circumnavigation?
Mildest air, roughly 10 to 15°C, the calmest seas of the year, and daylight that runs to midnight and beyond around the solstice. Every coastal fjord is navigable, so this is when the full loop and the Hornstrandir landings actually happen.
The practical gain from the light is time. Evening Zodiac operations and late landings are normal in June, which effectively lengthens the day the ship can use — we were ashore at hours that would be impossible anywhere else we sail.
The cost is company. Reykjavík and the south coast are busy, and hotel rates peak. On the ship that matters less than it would on a road trip.
When Is Puffin and Whale Season?
Atlantic puffins come ashore to nest in mid-May and are largely gone by mid or late August, so June and July are the strongest months at Látrabjarg and Borgarfjörður Eystri. Humpback, minke and — on good years — blue whales feed off the north coast through the summer.
Our own puffin photographs are from the very end of May, which is early in the window and already busy on the cliffs. Húsavík, on Skjálfandi Bay, is the whale-watching centre and worth a full day rather than a stop.
Arctic foxes in Hornstrandir are the other summer draw, and they are the reason a Zodiac landing in a roadless reserve is worth the morning — see the Westfjords guide.
Are May and September Worth It?
Yes, with trade-offs. Crisp, variable weather around 3 to 10°C, fewer people, autumn tundra colour in September, and the first dark-sky aurora chances from late August. Migratory seabirds arrive through May. Sailings still run but the weather has more say.
Shoulder months are also where cruise fares soften — see what an Iceland trip costs.
Can You Cruise Iceland in Winter?
Not meaningfully. October to April is cold, dark and rougher, and the expedition fleet is elsewhere. Winter Iceland is a land trip: aurora hunting, natural glacier ice caves under Vatnajökull, geothermal bathing and snow-covered volcanoes, with short daylight and real driving conditions.
Natural ice caves are only accessible roughly October to March, with certified guides, because they form and collapse with the melt cycle. That is a winter-only reason to choose the road.
General aurora planning lives on our Arctic pages rather than being repeated here. Driving conditions and route advice are in the Ring Road guide.
How Do You Choose Between the Two Seasons?
Decide what you cannot go home without. Puffins, a circumnavigation and the midnight sun mean June or July. Aurora, ice caves and empty roads mean the winter half of the year. Trying to split the difference in April or October gets you a milder version of both.
April is a real option and we have used it — but go in knowing what it is. The full ship-against-road decision is in Ring Road or cruise?.
Iceland timing questions
When is puffin season in Iceland?
Puffins come ashore mid-May and are largely gone by mid to late August, so June and July are the strongest months at the Westfjords cliffs and Borgarfjörður Eystri.
When do expedition ships circumnavigate Iceland?
Predominantly late May to early September, when the whole coast is navigable and daylight is long enough for evening operations.
Can you see the Northern Lights on a cruise?
Only at the very edges of the season, from late August into September. The reliable aurora months are late September to late March, which is land-trip territory.
Is April a good month?
It is a reasonable land-trip month — quiet roads, snow still on the ground, some winter sights still open — but it is neither the aurora season nor the sailing season. We drove it in April 2023 and it suited that purpose.
When can you visit natural ice caves?
Roughly October to March, with certified guides. They form and collapse with the melt cycle, which is why they are a winter-only sight.