Reykjavík weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Fair
Best time to visit: July
What is the weather like in Reykjavík in August?
In August, Reykjavík is cool: daytime highs average 14 °C, and nights cool down to about 8 °C. The sea averages 11.6 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. It rains often – on about 15 days, adding up to 97 mm. All in all, August is a so-so month for a holiday in Reykjavík.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 59 | 49 | 18 |
| Day | 15° | 14° | 10° |
| Night | 8° | 8° | 5° |
| Sea | 11° | 12° | 10° |
| Sun | 7 h | 6 h | 5 h |
| Rain days | 14 | 15 | 18 |
More details for August
- Daylight
- 16 h 33 min05:16 – 21:49
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 21 km/haverage daily peak
- Cloud cover
- 76 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+0Atlantic/Reykjavik
How the score comes together
- Temperatureweight 50 %62 %
- Sunshineweight 20 %55 %
- Few rainy daysweight 30 %21 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in August
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Reykjavík in August: quick answers
Is Reykjavík hot in August?
No. In August, Reykjavík is cool: daytime highs average 14 °C and nights drop to about 8 °C.
Can you swim in Reykjavík in August?
Only if you don't mind cold water: in August the sea averages just 11.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Reykjavík in August?
It rains often – on about 15 days, adding up to 97 mm.
Reykjavík month by month
The whole year in ReykjavíkAll destinations: IcelandWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)