Reykjavík Weather in August
August in Reykjavík 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 109 mm (4.3 in) for the month.
Rainfall in Reykjavík in August
Looking at the last 30 years, the data shows about 18 days with rain, averaging 109 mm (4.3 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Reykjavík in August
In August, expect moderate temperatures in Reykjavík, with highs of 15°C (59°F) and lows of 9°C (48°F) at night. During August, the summer season is in full swing. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Reykjavík in August
With about 154 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.
Wind Speed in Reykjavík 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
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.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June and July typically offer the best weather for Reykjavík.
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 Reykjavík's climate page.
Reykjavík Temperature in August
Min Temperature
9°C (48°F)
Max Temperature
15°C (59°F)
Water Temperature
11°C (52°F)
Chance of Rain
58%
Precipitation
109 mm (4.3 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 Reykjavík 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 Reykjavík in August
Browse day-by-day weather records for Reykjavík spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Reykjavík historical weather extremes in August
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Reykjavík.
- Reykjavík recorded its highest August temperature of 25°C (77°F) on August 11, 2004.
- The coldest August day was on August 27, 1992, with a maximum of 7°C (45°F).
- Reykjavík registered its coldest August night on August 27, 1982, with temperatures dropping to 1°C (34°F).
- The heaviest August precipitation occurred on August 31, 2014, when 49 mm (1.9 in) of precipitation fell.
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 →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Reykjavík in August
The weather can swing between comfortable and chilly in August, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Reykjavík 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 Reykjavík's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Reykjavík climate overview or explore weather in Iceland.
