Weather in April
April presents a significant shift in the atmospheric temperament of
Kópavogur. Both daylight hours and sea temperature show substantial increases, with the sea warming up to 5.9°C (42.6°F) from the cooler 5.1°C (41.2°F) of
March. This period marks the emergence of more spring-like conditions, featuring extended daylight hours that supplement the slightly warming sea. When
May comes around, residents can anticipate an even greater leap in sea temperatures.
Sea temperature
In Kópavogur, in April, the average water temperature is 5.9°C (42.6°F).
Note: It is advised against swimming in 5.9°C (42.6°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
In Kópavogur, the average length of the day in April is 15h and 9min.
On the first day of April in Kópavogur,
Iceland, sunrise is at 06:42 and sunset at 20:19. On the last day of the month, sunrise is at 05:00 and sunset at 21:48 GMT.