The climate of Öland is Baltic, that is to say, relatively continental, with cold winters and mild summers.
Öland is the second Swedish island and is located a short distance from the south-eastern coast of Sweden. Compared to the mainland, it has a dry and sunny microclimate.
The average temperature of the coldest month (February) is of 0.3 °C (33 °F), that of the warmest month (July) is of 19 °C (66 °F). However, during polar cold spells, the temperature can drop to -20 °C (-4 °F) or below, while in summer, it can reach 28/30 °C (82/86 °F), although rarely. Here are the average temperatures of the northern tip of the island.
Oland - Average temperatures
Min (°C)-1-103812161512741
Max (°C)225914202222181174
Min (°F)303032374654615954453934
Max (°F)363641485768727264524539

Precipitation amounts to 420 millimeters (16.5 inches) per year: it is therefore quite scarce. It ranges from 20 mm (0.8 in) in the driest month (February) to 50 mm (2 in) in the wettest (September). Here is the average precipitation.
Oland - Average precipitation

On average, there are around 2,090 sunshine hours per year. In summer, also due to the length of the days, the sunshine amount is quite good, and definitely better than in Norway. Here are the average sunshine hours per day.
Oland - Sunshine

The sea temperature ranges between 3 °C (37 °F) and 18 °C (64 °F). So, it never becomes warm for swimming. Here are the average sea temperatures.
Oland - Sea temperature
Temp (°C)43348131718151286
Temp (°F)393737394655636459544643


Best Time

The best time to visit Öland is the summer, from June to August, since it is the mildest season. However, you must take into account some rainy days.