what to pack for hafnarfjörður in august?

August is part of the best season to visit Hafnarfjörður, alongside July. Recent climate records from 2020 to 2024 show that August is the warmest month of the year, with an average temperature of 10.8°C, while July sits at 10.7°C. Because summer temperatures stay around 10°C to 11°C, it remains quite cool, so planning on warm layers is essential when visiting outdoor spots like Kleifarvatn or Helgafell.