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Grindavík Weather in August
With daytime temperatures of 14°C (57°F) and nighttime lows of 10°C (50°F), August in Grindavík brings moderate temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 108 mm (4.3 in) falls on average.
Rainfall in Grindavík in August
Historically, August sees about 18 days of rain, with a monthly average of 108 mm (4.3 in). This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Grindavík in August
Temperatures in Grindavík in August top out at 14°C (57°F) and drop to 10°C (50°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 10°C (50°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Grindavík in August
The city usually sees around 154 hours of sunlight, indicating a moderately sunny period.For Grindavík itself, July generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Grindavík Temperature in August
Min Temperature
10°C (50°F)
Max Temperature
14°C (57°F)
Chance of Rain
58%
Precipitation
108 mm (4.3 in)
Rainy days
18 days
Humidity
81% *
Sunshine
154 hours *
Percentage Sunshine
31% *
* Data from: Reykjavík, Iceland (41 KM, 25 Miles).
Grindavík Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grindavík - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Grindavík typically stay consistent throughout August, with daily highs averaging around 14°C (57°F). Nights are cool, with lows around 8°C (46°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 records for Grindavík in August
Browse day-by-day weather records for Grindavík spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grindavík historical weather extremes in August
Based on 50 years of weather observations in Grindavík between 1976 and 2026, these are the recorded extremes.
- On August 11, 2004, temperatures climbed to 26°C (79°F), marking the warmest August day on record.
- The coldest August day was on August 27, 1992, with a maximum of 7°C (45°F).
- The coldest night in August in Grindavík was on August 28, 1982, with a minimum of 3°C (37°F).
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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Grindavík 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Grindavík in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling5/10 -
Walking5/10 -
Camping3/10 -
Outdoor sports9/10
Grindavík 3-Day Forecast
More climate data for Grindavík
Temperature Rainfall Sunshine Humidity
See the full Grindavík climate overview or explore weather in Iceland.
Popular in August
Where to go in August - average daytime high across popular destinations.
Hella
16°C (61°F) Selfoss15°C (59°F) Reykjavík15°C (59°F) Kópavogur15°C (59°F) Egilsstadir
13°C (55°F) Keflavík13°C (55°F) Höfn
12°C (54°F) Akureyri13°C (55°F) Bucket list
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