Hafnarfjördur Weather in August
August in Hafnarfjördur brings moderate temperatures around 15°C (59°F) during the day, dropping to 9°C (48°F) at night, with quite a bit of rainfall expected, averaging around 111 mm (4.4 in) for the month.
Rainfall in Hafnarfjördur in August
Analyzing past climate data, one can expect approximately 18 days of rain, averaging 111 mm (4.4 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Hafnarfjördur in August
Hafnarfjördur in August gets highs of 15°C (59°F) during the day and drops to 9°C (48°F) at night. August is in the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Hafnarfjördur in August
The city usually sees around 154 hours of sunlight, indicating a moderately sunny period.
Wind Speed in Hafnarfjördur in August
August has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.
Average water temperature in August
With water temperatures around 11°C (52°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.Should you favor a climate that's both dry and comfortably warm, June and July typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Hafnarfjördur's climate page.
Hafnarfjördur Temperature in August
Min Temperature
9°C (48°F)
Max Temperature
15°C (59°F)
Water Temperature
11°C (52°F) *
Chance of Rain
59%
Precipitation
111 mm (4.4 in)
Rainy days
18 days
Humidity
81% *
Windspeed
5 m/s (10 knots) *
Sunshine
154 hours *
Percentage Sunshine
31% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hafnarfjördur typically stay consistent throughout August, with daily highs averaging around 15°C (59°F). Nights are cool, with lows typically ranging from 7°C (45°F) to 9°C (48°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Hafnarfjördur in August
Browse day-by-day weather records for Hafnarfjördur spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hafnarfjördur historical weather extremes in August
Based on 49 years of weather observations in Hafnarfjördur between 1976 and 2025, these are the recorded extremes.
- The warmest day in August was on August 11, 2004, with a maximum of 25°C (77°F).
- The lowest daytime temperature in August was 7°C (45°F), recorded on August 27, 1992.
- The coldest night in August in Hafnarfjördur was on August 27, 1982, with a minimum of 1°C (34°F).
- The wettest August day on record brought 47 mm (1.9 in) of precipitation to Hafnarfjördur (August 31, 2014).
Best Places in Iceland in August
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in August →
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What to Wear in Hafnarfjördur in August
The weather can be unpredictable in August, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 11°C (52°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Hafnarfjördur in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Hafnarfjördur's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Hafnarfjördur climate overview or explore weather in Iceland.
