September might be Iceland’s best kept open secret. The aurora season opens properly while roads remain summer easy, the birches and heathlands turn red and gold, the entire nation goes out to round up its sheep, and prices drop the moment the calendar flips. If you want the northern lights without winter logistics, this is the month built for you.
The September Equation
Daylight falls from 14.5 to 11.5 hours: long enough for full sightseeing days, dark enough for real aurora nights. Temperatures run 43 to 52°F (6 to 11°C). The first highland routes begin closing mid to late month, but the Ring Road and all lowland sights remain fully, comfortably open. Crowds thin by the week.
The Best Things to Do in Iceland in September
1. Hunt the Aurora in Comfort
September is statistically one of the best aurora months: equinox geomagnetic activity, properly dark nights from around 10 pm, and the radical luxury of waiting outside without arctic clothing. Lakes and lagoons, not yet frozen, double every display with reflections; Jökulsárlón under green light is the photograph of the season. Standard rules: vedur.is forecast, dark location, several nights of chances.
2. Réttir: The Great Sheep Roundup
Throughout September, farming communities ride into the mountains to gather the summer’s free range sheep, then sort them in communal stone circles amid singing, coffee, and controlled chaos. Many réttir welcome visitors and some let you help. It is rural Iceland’s biggest social event and the most authentic cultural experience on the travel calendar. Local listings publish dates each year.
3. Autumn Colors With Waterfall Backdrops
Iceland’s autumn is short and vivid: birch woods in gold (Þórsmörk, Ásbyrgi, Hallormsstaður forest in the east), heathlands in deep red, all peaking mid September to early October. The combination of fall color, fresh summit snow, and full flowing waterfalls makes this the photographers’ month.
4. The Ring Road’s Last Easy Lap
Roads remain in summer condition while the views gain autumn drama and the guesthouses regain availability. September is the final month the full circuit qualifies as relaxed rather than weather managed; the East fjords in particular reward the unhurried.
5. Catch the Highlands’ Final Weeks
Landmannalaugar and the main highland routes typically remain reachable into mid or late September before closures begin. Early month visits get autumn colored rhyolite and the hot river nearly to yourself. Check road.is daily; closures arrive with the first storms.
6. Whales, Seals, and Late Birds
Húsavík’s whale season runs strong through September, seals haul out reliably at Ytri Tunga and the Vatnsnes peninsula, and the last pufflings of the Westman Islands fledge in the month’s first days.
7. Berries, Lamb, and Harvest Tables
The crowberry and blueberry carpets of late August extend into September’s first weeks, the new season’s lamb dominates menus (this is objectively the best month to eat in rural Iceland), and harvest dinners appear at farm restaurants.
8. Bathing Weather, Aurora Ceiling
September perfects the lagoon experience: cool air, warm water, and the genuine possibility of northern lights overhead during an evening soak. The Mývatn Nature Baths and Sky Lagoon late sessions are the strategic bookings.
September Practicalities
Pack the layered kit plus a headlamp and tripod (aurora photography demands one). The first storms of autumn appear late month: build one flexible day per week of travel. 2WD still suffices for the Ring Road through most of the month. Book réttir adjacent guesthouses early in farming districts; locals fill them for the same weekends.
Frequently Asked Questions
Is September good for northern lights in Iceland?
One of the two or three best months of the year: dark nights, equinox activity, mild waiting conditions, and reflective water.
Is September still warm in Iceland?
Mild rather than warm: 6 to 11 degrees typically, closer to summer early month and autumn by the end.
Are tours still running in September?
Everything except some highland and puffin offerings runs at full schedule, with better availability than summer.
When is réttir in Iceland?
Throughout September, varying by district, with published schedules each year. Ask locally; visitors are widely welcome.
