Climate and monthly weather forecast
Grindavik, Iceland

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The climate of Grindavik

Grindavik, located in the southwest part of Iceland, is classified under the Köppen climate classification as Cfc. This type of climate corresponds to a marine west coast featuring cool summers.

Throughout the year, the weather in Grindavik is characterized by significant changes in temperature, humidity, and precipitation, showing a rich interplay of the town's marine climate aspects. High temperatures range from 4.2°C (39.6°F) in the colder months to 12.2°C (54°F) during the warmest, while the low temperatures swing from 1.3°C (34.3°F) to 9.9°C (49.8°F). Humidity holds relatively steady throughout the year, deviating between 74% and 81%.

January and February feature the highest snowfall, with levels reaching 57mm (2.24") and 50mm (1.97") respectively. Conversely, these months also experience the most snowfall days, with on average 6.8 and 5 days respectively. Rainfall shows a peak of 99mm (3.9") in January with a secondary peak of 86mm (3.39") in September, whereas rainfall days peak at 19.3 in April and are lowest in June at 12.5 days.

The best time to visit Grindavik

An optimal time to visit Grindavik would likely be in the summer months when the temperatures are relatively warm, yet cool enough for comfort. Specifically, July, indicates the highest temperatures with highs reaching 12.2°C (54°F) and lows of 9.9°C (49.8°F). Additionally, this month sees the longest hours of daylight, approximately 19.4 hours, and the highest UV index reading of 4, allowing for plenty of daytime activities.

Despite the relatively high humidity ranging from 80% to 81%, the lower rainfall levels, specifically in June with only 35mm (1.38"), make it a fair period for outdoor activities without the concern of heavy showers. Moreover, July being the windiest month with wind speeds of 20.3km/h (12.6mph), could prove to be quite exhilarating for visitors interested in wind-related activities.

The worst time to visit Grindavik

Conversely, the drawbacks of visiting Grindavik are most pronounced during the winter, particularly in January. This month sees the highest snowfall of the year with 57mm (2.24"), combined with the coldest high and low temperatures of 4.3°C (39.7°F) and 1.9°C (35.4°F) respectively. January also has the shortest amount of daylight per day, estimated at 5.7 hours.

Additionally, this period experiences the highest rainfall of the year, recorded at 99mm (3.9"). The combination of these weather factors would suggest less friendly conditions for outdoor activities, potentially affecting the overall experience for visitors.

Spring weather in Grindavik

Spring in Grindavik transitions from lower to moderately high temperatures. March sees highs of 4.2°C (39.6°F) and lows of 1.3°C (34.3°F), progressing to 7.8°C (46°F) and 5.1°C (41.2°F) in May. Rainfall is relatively moderate compared to other seasons, ranging from 82mm (3.23") in March to 58mm (2.28") in May.

Daylight hours significantly increase during spring, going from 11.8 in March to as long as 18.4 hours in May, offering more time for daytime activities. Snowfall is experienced until April, albeit at a reducing rate of 36mm (1.42") from the 75mm (2.95") observed in March.

Summer weather in Grindavik

The summer months in Grindavik usher in the best weather conditions of the year. From June to August, the highest temperatures increase from 10.5°C (50.9°F) to 12.2°C (54°F) while the low temperatures range from 8.1°C (46.6°F) to 9.8°C (49.6°F). Relative humidity rises to an annual high of 80% to 81% during these months, but the rainfall is among the lowest, at 35mm (1.38") in June and 59mm (2.32") in August.

The hours of daylight peak at 20.6 in June, slowly reducing to 16.3 hours in August. June also experiences no snowfall, making it an ideal period for outdoor activities.

Autumn weather in Grindavik

In autumn, Grindavik experiences a gradual cooling off from the summer's temperatures. High temperatures decline from 10.3°C (50.5°F) in September to 5.8°C (42.4°F) in November. Conversely, low temperatures drop from 8.4°C (47.1°F) to 3.3°C (37.9°F) over the same period. Autumn also witnesses a significant increase in rainfall, from 86mm (3.39") in September to a slightly less amount of 72mm (2.83") in November.

Regarding daylight hours, they begin to decrease in autumn, from 13 hours in September to just 6.6 hours by November. Despite this, the month of September still offers reasonably good weather for visitors before the onset of the harsh winter conditions.

Winter weather in Grindavik

Winter in Grindavik comes with a noticeable drop in temperatures and an increase in snowfall. High temperatures fall from 4.2°C (39.6°F) in December to the year's lowest of 4.2°C (39.6°F) in January and February. Low temperatures also plummet, ranging from 1.3°C (34.3°F) in December and February to 1.9°C (35.4°F) in January.

Snowfall exhibits a significant increase with December receiving 52mm (2.05") and January observing the highest levels of 57mm (2.24"). Daylight hours drop to an annual low, with only 4.5 hours in December. The average pressure readings also dip to the lowest levels of 998mb in December and 996.1mb in January. These factors combined present challenging weather for visitors during Grindavik's winter.

Weather in January

The new year kicks off in Grindavik, Iceland, with winter firmly entrenched, bringing colder temperatures alongside higher levels of both snowfall and rainfall. January brings the highest snowfall levels of 57mm (2.24"), ensuring a winter wonderland experience. Weather in January »

Weather in February

As February rolls in, the winter conditions in Grindavik still persist, yet the daylight gradually increases compared to January. Despite the increase in daylight time, there is a marginal drop in the snowfall levels to 50mm (1.97"). Weather in February »

Weather in March

As March arrives, spring starts to nudge the winter chill in Grindavik. With this change, snowfall levels reach as high as 75mm (2.95"), marking the third month of winter. Visitors possibly can anticipate enjoying sights of lush icy landscapes, punctuated by the first signs of daffodils emerging from the frozen ground. Weather in March »

Weather in April

April marks a noticeable shift in Grindavik's weather, with snowfall tapering off considerably to 36mm (1.42") compared to the previous month. Despite the more temperate conditions, remember to pack warm clothing as the air still retains a nip. Weather in April »

Weather in May

May ushers in the pleasant spring season in Grindavik, providing a welcome break from the bone-chilling winter months. This dramatic change in weather conditions ceases snowfall entirely, heralding teeming life into the previously frozen landscape. Weather in May »

Weather in June

By June, summer lays claim to Grindavik, with temperatures gently rising and no indications of snowfall. As locals and tourists alike appreciate the extended daylight hours amidst the captivating Icelandic environment. Often considered the best time to visit, Grindavik in June offers an array of outdoor activities, be it a dip in the Blue Lagoon or a midnight golfing session under the golden rays of the midnight sun. Weather in June »

Weather in July

July holds the title as the warmest month in Grindavik, with maximum temperatures averaging around 12.2°C (54°F). These conditions offer the perfect excuse to explore the city and its surrounding topography more extensively. Popular activities include fishing in the rich Atlantic waters, hunting down hidden gems in local flea markets, and sampling the culinary delights offered by the bustling food stalls. Weather in July »

Weather in August

August continues Grindavik's mild summer trend, with temperatures slightly dropping from July's highs. This change paves the way for a series of cultural festivals and events that dot the city's calendar at this time of year. As the month progresses, the Northern Lights gradually begin to make their return, delighting both locals and tourists with their magical performances. Weather in August »

Weather in September

September sees a slight cool down in Grindavik's weather, yet the temperatures are still comfortably mild. The gradual decline in temperatures provides an ideal backdrop for enjoying outdoor activities, be it hiking along scenic coastal trails or visiting the local museums. Weather in September »

Weather in October

Grindavik experiences a clear shift towards colder weather in October, with the temperature plunging to lows of 5.4°C (41.7°F). This period signals the onset of the winter season, with increased rainfall and the reappearance of snowfall after a long hiatus. Weather in October »

Weather in November

November sees the Grindavik weather transition towards the colder end of the scale, reminding locals and tourists alike of the approaching winter. Snowfall levels jump up to 23mm (0.91"), painting Grindavik in a pristine white. Weather in November »

Weather in December

December in Grindavik welcomes winter in full swing, with the temperature dropping to its lowest at 1.3°C (34.3°F). Despite the cold, spirits remain high as festive decorations light up the city in preparation for the holiday season. Weather in December »

Frequently asked questions

What is the rainiest month in Grindavik?

January is the month with the most rainfall in Grindavik. Rain falls for 16.7 days and accumulates 99mm (3.9") of precipitation.

How much does it rain in Grindavik?

Throughout the year, in Grindavik, Iceland, there are 193.9 rainfall days, and 833mm (32.8") of precipitation is accumulated.

When does it snow in Grindavik?

Months with snowfall in Grindavik, Iceland, are January through May, October through December.

How much does it snow in Grindavik?

In Grindavik, during the entire year, snow falls for 33.4 days and aggregates up to 297mm (11.69") of snow.

What is the month with the least sunshine in Grindavik?

January has the least sunshine of the year, with an average of 2.3h of sunshine.

When is the lowest UV index in Grindavik?

January through May, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Grindavik, Iceland.

What time of the year is the coldest in Grindavik?

February, March and December, when the average high-temperature reaches 4.2°C (39.6°F), are the coldest months.

When does it snow the most in Grindavik?

March is the month with the most snowfall in Grindavik, Iceland. Snow falls for 8 days and accumulates 75mm (2.95") of snow.

When is the sea coldest in Grindavik?

The month with the coldest seawater in Grindavik, Iceland, is March, with an average sea temperature of 5.8°C (42.4°F).

What is the driest month in Grindavik?

June is the month with the least rainfall. Rain falls for 12.5 days and accumulates 35mm (1.38") of precipitation.

When it does not snow in Grindavik?

June through September are months without snowfall.

When are the longest days in Grindavik?

June has the longest days of the year in Grindavik, with an average of 20h and 36min of daylight.

What part of the year is the hottest in Grindavik?

Grindavik sees its peak of temperatures during July and August, with an average high-temperature of 12.2°C (54°F).

What is the most humid month in Grindavik?

The months with the highest humidity are July and August, with an average relative humidity of 81%.

What month is the sea warmest in Grindavik?

The month with the warmest seawater in Grindavik is July, with an average sea temperature of 11.7°C (53.1°F).

What is the month with the highest UV index in Grindavik?

July is the month with the highest UV index in Grindavik, with an average maximum UV index of 4.

What month has the most sunshine in Grindavik?

With an average of 7.6h of sunshine, August has the most sunshine of the year.

What is the least humid month in Grindavik?

The least humid month in Grindavik is December, with an average relative humidity of 74%.

What is the month with the shortest days in Grindavik?

The month with the shortest days in Grindavik is December, with an average of 4h and 30min of daylight.

Is there Daylight Saving Time (DST) in Grindavik?

Grindavik, Iceland, does not observe Daylight Saving Time (DST). GMT timezone is used over the entire year.

Average temperature
Grindavik, Iceland

Average temperature - Grindavik, Iceland

The warmest months (with the highest average high temperature) are July and August (12.2°C).
The months with the lowest average high temperature are February, March and December (4.2°C).

The month with the highest average low temperature is July (9.9°C).
The coldest months (with the lowest average low temperature) are March and December (1.3°C).

Average pressure
Grindavik, Iceland

Average pressure - Grindavik, Iceland

The month with the highest atmospheric pressure is June (1013.7mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).

Average wind speed
Grindavik, Iceland

Average wind speed - Grindavik, Iceland

The windiest month (with the highest average wind speed) is February (35km/h).
The calmest month (with the lowest average wind speed) is June (20.1km/h).

Average humidity
Grindavik, Iceland

Average humidity - Grindavik, Iceland

The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is December (74%).

Average rainfall
Grindavik, Iceland

Average rainfall - Grindavik, Iceland

The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is June (35mm).

Average rainfall days
Grindavik, Iceland

Average rainfall days - Grindavik, Iceland

The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is June (12.5 days).

Average snowfall
Grindavik, Iceland

Average snowfall - Grindavik, Iceland

The month with the highest snowfall is March (75mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days
Grindavik, Iceland

Average snowfall days - Grindavik, Iceland

The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature
Grindavik, Iceland

Average sea temperature - Grindavik, Iceland

The best month for swimming (with the highest average sea temperature) is July (11.7°C).
The coldest month (with the lowest average sea temperature) is March (5.8°C).

Average daylight / Average sunshine
Grindavik, Iceland

Average daylight / Average sunshine - Grindavik, Iceland

The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).

The month with the most sunshine is August (Average sunshine: 7h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

Average sunshine days
Grindavik, Iceland

Average sunshine days - Grindavik, Iceland

The month with the most sunshine days is June (15 days).
The months with the least sunshine days are March and April (7.1 days).

Average UV index
Grindavik, Iceland

Average UV index - Grindavik, Iceland

The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 2).

Average visibility
Grindavik, Iceland

Average visibility - Grindavik, Iceland

The months with the highest visibility are June and August (10km).
The months with the lowest visibility are January, February, March, April, May, July, September, October, November and December (9km).

Grindavik, Iceland

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