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Iceland weather in August 2025
Expect 54°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Iceland in August. Check more long-term weather averages for Iceland in August before you book your next holiday to Iceland in 2025/2026.
- 54°F max day temperature
54 - 5 hours of sunshine per day
- 18 days with some rainfall
18 - 45°F min night temperature
45 - 16 hours of daylight per day
16 - No heat & humidity
0 - 3.3 inches of monthly rainfall
3.3 - 3 (Moderate) UV index
3 - 52°F sea temperature
52
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The August weather guide for Iceland (Reykjavik) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Iceland destinations
Below are average maximum temperatures at popular countries, regions and places in Iceland in August. Select a holiday destination to see more weather parameters.
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Metric (°C) | Imperial (°F)
More about Iceland
How warm is it in Iceland in August?
Daytime temperatures usually reach 54°F in Reykjavik, Iceland in August, falling to 45°F at night.
How sunny is it in Iceland in August?
There are normally 5 hours of bright sunshine each day in Reykjavik, Iceland in August - that's 29% of daylight hours.
How warm is the sea around Iceland in August?
The average sea temperature around Reykjavik, Iceland in August is 52°F.
Does it rain in Iceland in August?
There are usually 18 days with some rain in Reykjavik, Iceland in August and the average monthly rainfall is 3.3 inches.
Iceland August sunrise & sunset times
Browse the sunrise and sunset times for Iceland in August 2025. Select a month to view Iceland sunrise and sunset times for the next 12 months. The Iceland sunrise and sunset times shown below are for Reykjavik.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Friday, 1st August 2025 | 04:35 | 22:30 |
| Saturday, 16th August 2025 | 05:22 | 21:39 |
| Sunday, 31st August 2025 | 06:08 | 20:46 |
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