Climate and monthly weather forecast
Þorlákshöfn, Iceland

The geographical positioning of Þorlákshöfn marks its climate as marine west coast with cool summers, technically known as Cfc under the Köppen climate classification. Throughout the year, the region is characterized by moderate temperatures and considerable oceanic influence. Variations in weather parameters including sea temperature and daylight hours can be observed.

Analysis of the data shows that the sea temperature remains quite steady during the year, with the lowest value being 5.7°C (42.3°F) in March and the highest reaching 11.8°C (53.2°F) in July. The average annual sea temperature ranges from 5.8°C (42.4°F) to 11.8°C (53.2°F). Similarly, there is significant variability in daylight hours as the year progresses. With the progression of winter into spring, there is an observable increase in daylight hours from 5.7 hours in January to 15.1 hours in April. The peak of daylight is reached in June at 20.6 hours per day, following which it gradually decreases.

Unique weather patterns can be detected in Þorlákshöfn, particularly in the months of June and December. June has the maximum daylight hours (20.6 hours), while December, countered by the winter solstice, is marked by the shortest daylight span of the year at only 4.5 hours.

The prime time to visit Þorlákshöfn is generally between late spring and early summer, specifically May to July, when the weather conditions are most encouraging. At this time, the sea temperature has warmed to between 7.6°C (45.7°F) and 11.8°C (53.2°F), providing a comfortable environment for seaside activities. Furthermore, daylight hours reach their zenith during these months, ranging 18.4 hours to 20.6 hours per day.

It is generally advised that the least favorable time for touring Þorlákshöfn is in the heart of winter particularly from November to January. In these months, sea temperatures can fall to as low as 5.8°C (42.4°F) to 7.2°C (45°F) which can make seaside activities far less pleasurable. Furthermore, daylight hours are notably short, limiting outdoor activities with them ranging just from 4.5 to 6.6 hours per day.

During the spring months, from March to May, Þorlákshöfn experiences a gradual warming up. Sea temperatures rise slowly from 5.7°C (42.3°F) in March to 7.6°C (45.7°F) in May. Accompanying this, daylight hours experience a significant increase over the same period, escalating from 11.8 hours to 18.4 hours, heralding the onset of brighter and longer days.

The summer months, from June to August, witness the warmest sea temperatures, ranging from 9.7°C (49.5°F) in June to a peak of 11.8°C (53.2°F) in July, then slightly dropping to 11.6°C (52.9°F) in August. These months also enjoy the longest daylight hours in the year, with the peak in June at 20.6 hours, and daylight periods remaining extensive from 19.4 hours to 16.3 hours through August.

As autumn sets in from September to November, Þorlákshöfn experiences a cooling trend. The sea temperatures fall from 9.9°C (49.8°F) in September to 7.5°C (45.5°F) in November. Correspondingly, daylight hours also start reducing, shrinking from 13 hours in September to 6.6 hours by November.

Winter declines bring further cooling in Þorlákshöfn, with the months of December to February experiencing the chilliest sea temperatures, transiting between 7.2°C (45°F) and 5.8°C (42.4°F). Daylight hours are at their least during these winter months, with the shortest amount of daylight of 4.5 hours in December, slightly increasing to 5.7 hours by February.

January in Þorlákshöfn, Iceland, ushers in the full depth of winter, with chilly air and potentially inclement conditions. As the harshest winter month, temperatures average around a chilly 5.8°C (42.4°F) in the sea. An increase in layered clothing is obligatory as brisk Arctic winds drift from the North Atlantic, markedly reducing the perceived temperature. Weather in January »

The tail end of winter is experienced in February, and as one transitions from January, a slight elevation of sea temperatures can be felt as it averages 5.9°C (42.6°F). Despite this rise, the climatic conditions remain challenging due to lingering frosty winds. Weather in February »

The onset of March marks the beginning of a transition from winter to spring in Þorlákshöfn, Iceland. When compared to February, there is a minute drop in the average sea temperature, decreasing to 5.7°C (42.3°F). Despite this apparent retreat, the promise of spring is palpable with the increasing daylight hours. Weather in March »

As Þorlákshöfn transitions into spring, April brings a noteworthy rise in climatic conditions, with the sea temperature reaching an average of 6.3°C (43.3°F). Longer days become the norm, providing ample time for outdoor recreation and wildlife spotting. Weather in April »

May brings considerable changes to the Þorlákshöfn weather pattern, as Iceland kicks into the spring season properly. Sea temperatures hike up to an average of 7.6°C (45.7°F) and daylight hours increase significantly. As a result, May is a pleasant time to wander around and enjoy the blooming lupine fields that cover the country. Weather in May »

June is the door to the Icelandic summer and brings the first surge of tourist activity to Þorlákshöfn. The sea at this time averages around 9.7°C (49.5°F). With days extending dramatically, the region experiences a unique phenomenon known as the midnight sun. Weather in June »

July, being the middle of the Icelandic summer, marks the peak of visitor influx in Þorlákshöfn. Despite a slight reduction in daylight hours from June, the region still experiences the midnight sun, with daylight averaging around 19.4 hours. Weather in July »

August in Þorlákshöfn, Iceland, signals the close of the summer and the commencement of autumn preparations. A drop in sea temperature to 11.6°C (52.9°F), albeit minor, is noticeable from the July peak. Despite reduced sunlight hours, days are still considerably long, facilitating outdoor endeavors. Weather in August »

Au revoir to summer, welcome fall. September in Þorlákshöfn is marked by further drops in sea temperatures, reaching 9.9°C (49.8°F). Light diminishes, yet days are not extremely short, giving a dazzling display of autumn colors throughout the country. Weather in September »

Þorlákshöfn, Iceland, brings in October with a definitive shift into the autumn-winter transition. Sea temperatures continue on their fall trail, recording an average of 8.6°C (47.5°F) in October. As daylight hours dwindle, the transformation of colors is mesmerizing, adorning the city in shades of orange, red, and yellow. Weather in October »

November ushers in the onset of winter in Þorlákshöfn, as seas register average temperatures of 7.5°C (45.5°F). The shift in weather patterns from October is evident, with the onset of dull skies and increasingly colder temperatures. Weather in November »

December in Þorlákshöfn marks the commencement of winter in its fullest intensity. An evident drop in sea temperature, settling at an average of 7.2°C (45°F), pronounces the winter season. Though daylight hours are scant, averaging just 4.5 hours, this does not dampen the holiday spirit. Weather in December »