Climate and monthly weather forecast
Seltjarnarnes, Iceland

Shooting westwards into the Atlantic from the country's main island, Seltjarnarnes, Iceland, falls within the Köppen climate classification of 'Cfc'. This classification describes the prevelant climatological features as a marine west coast climate, with a cool summer. Over the year, the nature of climatological elements in Seltjarnarnes swings from stark contrasts between extended daylight drenched summers and dark winters to consistency in sea temperatures.

Daylight hours vary from the relatively short 4.4 hours of December to the extensive 20.9 hours in June, reflecting the stark contrast between extended Icelandic summers and dark winter months. Where this contrasts less is with the sea temperature in Seltjarnarnes, as it maintains limited fluctuation between 4.3˚C in March to 11.3˚C in the summer months of July and August. This range, though narrow, is a natural effect of the town's geographic positioning on the brink of the North Atlantic.

The weather patterns of Seltjarnarnes bring their own uniqueness tied to each month. Daylight hours peak in June and then decline gradually, while the sea temperature, in an interesting anomaly, reaches its maximum in July and August, after the peak of daylight hours.

The extended daylight hours, running from 15.2 hours in April to 19.6 in July, combined with the warmest sea temperatures of 9.3˚C to 11.3˚C within May to August, make this period the most favourable to visit Seltjarnarnes. Visitors can enjoy both outdoor and sea activities, embracing the town's captivating scenery while basking in comparatively comfortable temperatures and ample daylight.

The period beginning from November to March earns the distinction of being the least attractive for outdoor activities given the scanty daylight hours and cool sea temperatures. Daylight shrinks from 6.5 hours in November to a meagre 4.4 hours in December, while sea temperature decelerates from 6.9˚C to 4.3˚C between November and March.

As spring arrives in Seltjarnarnes, the climate witnesses a convergence of gradually warming sea temperatures and increasing daylight hours. The sea temperature climbs from 5.6˚C in March to 6.9˚C in May, while daylight expands from 11.8 hours to 18.5 hours from March to May. The reach of daylight and rising sea temperatures encourage the spring bloom, painting the coastal town in vibrant hues.

Summer is golden in Seltjarnarnes with daylight reaching its peak. Between June and August, daylight hours range from 19.6 hours to 20.9 hours offering generous sunlight. Simultaneously, sea temperatures peak at 11.3˚C in July and August, marking the warmest period of the year.

Through September to November, daylight in Seltjarnarnes begins to recede, with hours dropping from 13 hours to 6.5 hours. Concurrently, sea temperatures drop from 9.7˚C in September to 6.9˚C in November. Autumn brings lower temperatures, shortened daylight, and the onset of a cooler climate.

Winter descends upon Seltjarnarnes from December to February, as brisk sea temperatures and minimum daylight dominate the season. Daylight plummets to its shortest at 4.4 hours in December, while sea temperature drops to a yearly low of 4.3˚C in March. The winters are typically long, dark, and filled with the serenity of the quiet town.

January in Seltjarnarnes, Iceland is a deep winter month, marked by short daylight hours and a chilling sea breeze. The weather during this time is typified by frigid temperatures, coupled with the seaside town's location on the coast of Iceland's Snaefellsnes Peninsula. Weather in January »

In February, Seltjarnarnes still finds itself in the grip of winter with temperatures that can chill to the bone. The town experiences an increase in daylight hours compared to January, signalling the beginning of a slow transition towards spring. Weather in February »

As Seltjarnarnes progresses into March, there are noticeable changes in weather conditions, setting the stage for the arrival of spring. The frigid temperatures of winter start to loosen their grip, offering a subtle perception of the warmer days ahead. Weather in March »

April introduces a tangible change in Seltjarnarnes's weather with a more distinct lean into spring's embrace. The seaside town experiences a shift in the climate, trading the winter chill for modest warmth. Sea temperature sees a rise to 5.6°C (42.1°F), complementing the increase in daylight hours. Weather in April »

In May, Seltjarnarnes witnesses a significant advance into the spring season. Residents start to enjoy noticeably longer daylight hours and warmer temperatures, keeping the winter memories in the rear-view mirror. Progress in sea temperature is evident as it climbs to an average of 6.9°C (44.4°F). Weather in May »

June in Seltjarnarnes signals the official arrival of summer, unfolding with longer daylight hours and warmer temperatures. The increase in sea temperature to an average of 9.3°C (48.7°F), suggests more pleasant conditions for locals and tourists alike. Weather in June »

Residing in Seltjarnarnes in July means experiencing the epitome of Icelandic summer, with weather conditions at their peak. The month presents the highest sea temperature for the year, reaching up to 11.3°C (52.3°F). July's pleasant weather differentiates it from June, providing ample daylight hours and warmer temperatures. Weather in July »

By the time August rolls around in Seltjarnarnes, summer gradually begins to wind down. Despite maintaining the same sea temperature peak of 11.3°C (52.3°F) as July, a slight regression in daylight hours commences. August successfully retains much of the warmth and brightness of July. Weather in August »

September in Seltjarnarnes embodies the onset of fall, a noticeable contrast to the summer warmth of August. The average sea temperature starts to retreat to a cooler 9.7°C (49.5°F) indicating the arrival of the fairly milder months. Weather in September »

The full force of autumn arrives in Seltjarnarnes in October, underlining the change from the previous month. Sea temperature continues its descent settling at an average of 8.2°C (46.8°F), underscoring the further cooling of weather conditions. Weather in October »

In November, Seltjarnarnes's weather begins to lean heavily towards winter temperatures, indicating a shift from the previous month of October. A continued decrease in sea temperature to an average of 6.9°C (44.4°F) reiterates the escalating cold conditions. Weather in November »

Concluding the year, December in Seltjarnarnes unveils winter in all its might, making the shift from November's weather more pronounced. A decrease in sea temperature to an average of 6.4°C (43.5°F) paints a clear picture of the weather's severity. Weather in December »