Garðabær Weather in August
August in Garðabær sees daytime temperatures around 15°C (59°F) and lows of 9°C (48°F) at night. With around 111 mm (4.4 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Garðabær in August
On average, there are about 18 days with rain during this month, averaging 111 mm (4.4 in). Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Garðabær in August
In August, Garðabær sees moderate temperatures, with highs of 15°C (59°F). Nights drop to around 9°C (48°F). The summer season takes place during August. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. 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 Garðabær in August
The area enjoys a moderate level of sunlight, with around 154 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Garðabær in August
Average wind conditions reach 5 m/s (10 knots) in August. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.
Average water temperature in August
The water temperature is only 11°C (52°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.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 Garðabær's climate page.
Garðabær 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 Garðabær 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 Garðabær in August
Browse day-by-day weather records for Garðabær spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Garðabær historical weather extremes in August
The extremes listed below come from historical weather data collected in Garðabær from 1976 through 2025.
- Garðabær recorded its highest August temperature of 25°C (77°F) on August 11, 2004.
- Garðabær experienced its chilliest August day on August 27, 1992, reaching only 7°C (45°F).
- The lowest overnight temperature recorded in August was 1°C (34°F) (August 27, 1982).
- Peak precipitation in August occurred on August 31, 2014, when 48 mm (1.9 in) of precipitation was measured.
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 Garðabær in August
Pack for changing conditions in Garðabær in August. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 11°C (52°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Garðabær 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 Garðabær's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Garðabær climate overview or explore weather in Iceland.
