Iceland in September: Weather, Crowds & What to Expect

Southwest & Reykjavík (Golden Circle)

September’s light shifts noticeably and there’s a crispness in the air; daytime highs often fall to single digits while nights cool quickly. This is the beginning of aurora season-clear nights away from city lights can reward you with northern lights-and the early autumn colours in Þingvellir and coastal lowlands are pleasant. Tourist pressure eases; many summer tours still operate but check schedules for boats and highland road openings. Bring warm mid-layers and a hat for evening outings.

South Coast & Vatnajökull (Vík, Skaftafell, Jökulsárlón)

September’s crisp mornings and fewer tourists make the south coast quietly attractive; daytime highs drop to single digits and the first autumn storms can appear. The light is excellent for photography of the beaches and glaciers; many operators continue running tours into early autumn but check availability. Aurora chances increase toward month’s end on clear nights away from light pollution, so pack a warm jacket for late-evening watches.

East Fjords & Southeast (Egilsstaðir, Höfn)

September’s crisp mornings and clear light make the East Fjords a favorite for photographers: daytime temps decline to single digits while autumn colours start to flush the hillsides. Many summer services begin to wind down by late month, but restaurants remain open in larger towns and hiking conditions are still very good. Occasional storms bring rain and wind; layer up for brisk sea breezes at lookout points.

North Iceland (Akureyri, Mývatn, Húsavík)

September’s cooling temperatures and clear autumn light make the north very satisfying for photographers and hikers; highs fall into single digits and nights lengthen enough to reveal the aurora. Húsavík’s whale season tapers but still often produces sightings, and many guesthouses stay open through the month. Bring warmer layers and a hat for evening aurora watches and be ready for brisk sea breezes.

Westfjords & Northwest (Ísafjörður, Dynjandi, Hornstrandir)

September cools quickly and ferry services start to reduce; cloudless days make for clear landscape photography while stormier spells arrive earlier than in the south. Puffins depart mid-to-late month and hiking into Hornstrandir transitions to more rugged, wind-blasted terrain. Plan accommodations in advance for this shoulder season and bring warm layers for crisp evenings.

Central Highlands & Interior (Landmannalaugar, Kjölur, Kerlingarfjöll)

September sees highland services winding down and the weather turning crisper-many huts close mid-late month and F-roads start to become unreliable again. Daytime temperatures fall, and early snow can interrupt crossings; itineraries need flexibility. This is a quieter month with fewer hikers but increased chance of dramatic weather and a faster-moving tourist season; pack warm layers and be ready to adjust plans.