Iceland in September: where is it warmest?
In September, Reykjavík is the warmest place with 10 °C by day, Ísafjörður the coolest with 8 °C. 0 of 5 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Reykjavík | 15 | 10° | 10° | 4 h | 18 |
| Grindavík | 3 | 10° | 10° | 4 h | 18 |
| Hafnarfjörður | 3 | 10° | 10° | 4 h | 18 |
| Akureyri | 1 | 10° | 8° | 3 h | 17 |
| Ísafjörður | 0 | 8° | 9° | 3 h | 18 |
Iceland in September: quick answers
Iceland in September: where is it warmest?
The warmest places in September are Reykjavík (10 °C), Grindavík (10 °C) and Hafnarfjörður (10 °C).
Iceland in September: where is the sea warmest?
The sea is warmest at Reykjavík (10 °C), Grindavík (10 °C) and Hafnarfjörður (10 °C).
Iceland in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Reykjavík, Grindavík and Hafnarfjörður.
Iceland month by month
Iceland: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences