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Iceland in September: Weather, Fall Colors, & Things to Do

A couple walks hand in hand along a gravel path toward Kvernufoss waterfall, framed by dark volcanic cliffs and golden autumn grass in South Iceland.
There's a special kind of magic to Iceland in September, when fall colors meet the return of darker skies. Pictured: Kvernufoss, South Iceland. Photo: Icelandic Explorer

If you can't decide between summer adventures and cozy fall evenings, September lets you enjoy both. Days are still long enough for road trips, hiking, and sightseeing, while darker nights bring the return of the Northern Lights. Add colorful autumn landscapes to the mix, and it's easy to see why September is such a special time to visit.

Whether you're planning your first adventure or returning to discover more, visiting Iceland in September offers something for every traveler. This guide covers everything you need to know, from the weather to seasonal activities, festivals, and the best places to explore.

Weather in Iceland in September

One thing you'll quickly notice about Iceland in September is how quickly the weather can change. It's not unusual to experience sunshine, light rain, and wind all in the same day. So, dressing in layers is the easiest way to stay comfortable.

Here's what you can expect about the weather in Iceland during September:

  • Average daytime temperatures: 48–54°F (9–12°C)
  • Average nighttime temperatures: 41–46°F (5–8°C)
  • Rain: Passing showers are common throughout the month
  • Wind: Conditions can be breezy, especially along the coast

Weather can vary from one region to the next. You might enjoy sunshine on the South Coast while rain moves across the Reykjanes Peninsula or North Iceland. Before setting out, check the local forecast (via vedur.is) to make the most of your day.

Daylight Hours in Iceland in September

September strikes a nice balance between long days for exploring and darker evenings for stargazing. Daylight hours in Iceland in September gradually decrease throughout the month:

  • Early September: Around 14 hours of daylight
  • Mid-September: Around 12–13 hours of daylight
  • Late September: Around 11–12 hours of daylight

You'll still have plenty of time to hit the road, hike scenic trails, or visit waterfalls. At the same time, the longer evenings create better opportunities to look for the Northern Lights in Iceland.

Best Things to Do in Iceland in September

September is one of those months when you don't have to choose between summer and fall. If you’re visiting Iceland in September, here are some of the best ways to experience the season.

A person stands on a cliff in Iceland, watching vivid green Northern Lights dance across the night sky.
September marks the return of the Northern Lights over Iceland, with every display putting on a slightly different show. Photo: Ragnar Th. Sigurdsson / Arctic Images

1. Chase the Northern Lights

As nights grow longer in September, the odds of catching the Northern Lights start to climb. If the forecast looks promising, head away from city lights, watch the cloud cover, and be patient.

The Northern Lights in Iceland have a habit of appearing when you least expect them. Sometimes they're subtle, while other nights they appear as vivid ribbons of green dancing across the sky. Every display is a little different, making each sighting unique.

2. Witness the annual sheep round-ups (Réttir)

Every September, communities across Iceland come together for Réttir, a centuries-old tradition of bringing sheep down from the mountains. Many sheep round-ups in Iceland welcome visitors, giving you the chance to experience a day of local culture, food, and celebration. The tradition takes place across the country, with North Iceland home to many of the season's best-known round-ups.

3. Pick some wild berries with the locals

September is berry season in Iceland, making it a wonderful time to head into the countryside with a bucket in hand. Wild blueberries and crowberries grow across hillsides and lava fields, and many locals gather them for jams and homemade treats. If you decide to pick your own, remember to respect nature and avoid gathering berries in protected areas.

4. Admire the autumn landscape

As summer fades into fall, Iceland's landscapes begin to change color, and often very fast. Moss-covered lava fields stay green, while shrubs, grasses, and low-growing birch trees begin turning shades of yellow, orange, and red. It's a beautiful time to slow down, take a scenic drive, or simply pause and enjoy the changing season.

Some of the best places to experience Iceland's autumn colors include:

September's fall colors make it a favorite season for photographers.

Aerial view of Miðhús cottages surrounded by golden autumn trees and open countryside near Egilsstaðir in East Iceland.
Autumn brings warm shades of yellow, orange, and red to East Iceland, transforming forests and valleys as the seasons begin to change, like here at Miðhús cottages near Egilsstaðir. Photo: Icelandic Explorer / Visit East Iceland.

5. Hike in the Icelandic Highlands

Want to experience hiking in Iceland? Early September is often one of the last chances to explore the Icelandic Highlands before the F-roads (mountain roads) close for the season. It's a wonderful time to be out on the trails. Cooler days, quieter trails, and the first hints of autumn create a different feel across the landscape.

Popular hiking areas in Iceland in September include:

  • Þórsmörk: Offering lush valleys surrounded by glaciers and rugged peaks
  • Landmannalaugar: With colorful rhyolite mountains and geothermal hot springs
  • Kerlingarfjöll: Boasts geothermal valleys, steaming vents, and striking mountain scenery

Highland conditions can change quickly. So, check the latest road and trail information (via SafeTravel.is) before setting out.

6. Join whale watching tours

Whale watching in Iceland is still going strong in September, making it a wonderful time to get out on the water. Depending on where you travel, you may spot humpback whales, minke whales, white-beaked dolphins, or harbor porpoises. You can hop on a whale-watching boat from Reykjavík, Húsavík, Akureyri, and Dalvík. Every tour is different, so each outing comes with a sense of anticipation.

7. Experience glacier hiking

If you've ever wanted to hike on a glacier, September is an excellent time to do it. Guided tours are still running, and the cooler weather makes for favorable conditions on the ice. You can join guided hikes on Sólheimajökull, Falljökull, and in Skaftafell within Vatnajökull National Park.

Would you rather stay on the water? Guided kayaking tours in Iceland at Jökulsárlón and Fjallsárlón offer another way to experience Iceland's glaciers.

8. Soak in natural geothermal pools

After a day of exploring, few things feel better than soaking in Iceland's naturally heated waters. The cooler September weather makes soaking outdoors even more enjoyable. You can choose a geothermal lagoon, a natural hot spring, or even a seaside soak.

If you want to experience geothermal wellness in Iceland, consider the Blue Lagoon, Sky Lagoon, Vök Baths, or GeoSea. For a more natural setting, there’s the Hrunalaug or Sundlaugin Laugarnesi Birkimel. At Hvammsvík Hot Springs, you can even combine geothermal pools with a refreshing dip in the Atlantic Ocean.

A couple is bathing in an infinity pool overwieving the fjord on a sunny day
Cooler September weather makes soaking in Iceland’s naturally heated waters even more inviting, whether you choose a geothermal lagoon, a natural hot spring, or a seaside soak. At GeoSea in Húsavík. Photo: Visit North Iceland.

Best Places to Visit in Iceland in September

Not sure where to go? These destinations are especially rewarding to visit during September, whether you're planning a weekend getaway or a Ring Road adventure:

  • Reykjavík: Perfect for city breaks with a mix of culture, food, and history. September also brings seasonal events like the Reykjavík International Film Festival (RIFF) in the capital.
  • Golden Circle: Ideal for first-time visitors who want to see some of Iceland's iconic natural attractions in a single day. September's early fall colors make places like Þingvellir National Park especially scenic.
  • South Coast: A great choice if you want to combine sightseeing with adventure. You can visit waterfalls, black sand beaches, glacier lagoons, and even join activities like glacier hiking or kayaking.
  • North Iceland: Perfect for travelers interested in wildlife, volcanic landscapes, and local traditions. September is a great time for whale watching around Húsavík and for experiencing the annual Réttir sheep round-ups.
  • Icelandic Highlands: Best for hikers and outdoor enthusiasts. Early September is often one of the last chances to explore places like Landmannalaugar, Þórsmörk, and Kerlingarfjöll before seasonal F-road closures.

Festivals in Iceland in September

September is also a lively month for arts and culture in Iceland. If your visit lines up with one of these events, it's a great chance to experience another side of Iceland:

  • Nights of Lights (Ljósanótt): Held in Reykjanesbær, this annual festival celebrates the arrival of autumn with concerts, art exhibitions, fireworks, and family-friendly activities.
  • Reykjavík International Film Festival (RIFF): One of Iceland's best-known film festivals. It showcases Icelandic and international cinema through screenings, talks, and special events across the capital.
  • Vaka Folk Art Festival: This celebration of Icelandic arts and crafts takes place in Reykjavík and features exhibitions, workshops, music, and opportunities to meet local artists.
  • Októberfest: Despite its name, this festival begins in late September. It brings together Icelandic beer, traditional Icelandic food, live music, and a festive atmosphere at the University of Iceland.

Driving in Iceland in September

Planning a road trip? September is one of the easiest months to explore Iceland by car. The Ring Road and most other main roads are usually in good condition. And there's still plenty of daylight for scenic drives and spontaneous stops.

Before you set out, it's always a good idea to:

  • Look up the weather forecast at vedur.is.
  • Check the latest road conditions at road.is.
  • Leave extra time for waterfalls, viewpoints, and scenic detours.
  • Confirm that F-roads (mountain roads) are still open if you're planning to visit the Highlands.
  • Drive carefully on gravel roads and adjust your speed to the conditions.

A 2WD is usually all you need in September. If the Highlands are on your itinerary, rent a 4x4, as F-roads require a suitable four-wheel-drive vehicle.

The weather can change quickly, especially in the Highlands region. So, a flexible itinerary will help you make the most of your September adventure.

What to Pack for Iceland in September

September weather in Iceland can shift fast: sunshine, wind, and a passing rain shower can all happen in the same day. The key is layers you can add or peel off as the day changes.

Here's what to wear in Iceland in early fall:

  • Waterproof and windproof jacket
  • Waterproof hiking shoes or boots
  • Thermal base layers (preferably wool)
  • Warm mid-layer, such as a fleece or light insulated jacket
  • Comfortable, water-resistant or waterproof hiking pants
  • Warm hat, gloves, and a light scarf
  • Swimsuit and towel for geothermal pools

If you plan to hike or spend time outdoors after sunset, pack an extra warm layer. You'll be glad to have it when temperatures begin to drop.

A traveller photographs steaming geothermal vents and colourful rhyolite mountains in the Icelandic Highlands.
September is a wonderful time to hike through the Icelandic Highlands, with steaming geothermal vents and colourful mountains around every turn. Photo: Axel Sig.

Experience Early Fall in Iceland in September

Iceland in September is a month of changing seasons. It brings colorful fall landscapes, outdoor adventures, local traditions, and the return of darker nights. It's a time to hike through the Highlands, forage for wild berries, explore glacier lagoons, and soak in geothermal waters. After a day of exploring, you might even be rewarded with a glimpse of the Northern Lights overhead.

No matter where your itinerary takes you, September offers the chance to experience Iceland at a slightly slower pace. All while discovering a different side of the country. Pack a few extra layers, stay flexible, and enjoy everything this early fall season has to offer.

FAQs

Yes. September is one of the best times to visit Iceland, with mild weather, fall landscapes, and plenty of outdoor activities. It's also the start of the Northern Lights season, while experiences like hiking and whale watching are still in full swing.

Yes. September marks the return of the Northern Lights in Iceland after the bright summer months. While sightings are never guaranteed, the darker nights bring your first opportunities to see the aurora again. For the best chance, head somewhere with clear skies and little light pollution.

September is considered a shoulder-season month, so prices may be lower than during Iceland's peak summer season. Costs vary depending on where you stay, how you travel, and how far in advance you book.

Yes, snow is possible in September in Iceland, particularly in the Highlands and at higher elevations. Lower coastal areas usually experience rain rather than snow, especially early in the month.

Daylight in Iceland gradually decreases throughout September. Early in the month, Iceland receives around 14 hours of daylight, while late September has about 11 to 12 hours. The longer nights create favorable conditions for viewing the Northern Lights.

September is generally quieter than the peak summer months. Many attractions still have a lively atmosphere, while the changing season often creates a more relaxed pace for exploring.

Not at all. September is relatively mild, with daytime temperatures typically ranging from 48–54°F (9–12°C). With warm layers and waterproof clothing, it's comfortable for sightseeing and outdoor activities.

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