Climate
Cyprus enjoys an intense Mediterranean climate, with long dry summers from mid–May to mid–October, and mild winters from December to February, which are separated by short autumn and spring seasons.
Summer is a season of high temperatures with cloudless skies, but the sea breeze creates a pleasant atmosphere in the coastal areas. Isolated thunder showers are possible mainly over the mountains during early afternoons.
Winters are mild with rain and snow on Troodos Mountains (usually starting before Christmas).
The island enjoys abundant sunshine, and even in December and January, there is an average of six hours of bright sunshine per day, whilst over the six ‘summer’ months, there is an average of 11.5 hours of bright sunshine per day.
Temperatures and Weather Conditions
Daily temperatures during the hottest months of July and August range between 30° C on the central plain, and 24° C on the Troodos Mountains. The average maximum temperatures for these two months range between 38° C and 27° C. In January, the coolest month, the indicative daily temperature is 10° C on the central plain, and 3° C on the higher parts of the Troodos Mountains, while the average minimum temperatures are 5° C and 0° C.
Sea Temperatures
The temperature in the open sea hovers above 22° C from June to November, climbing to 27° C in August. Even during the three coolest months of January to March, average sea temperature are an acceptable 16° or 17° C. Near the coast, the temperature of water three or four metres deep is similar to that of the open sea, ranging from 15° to 17°C in February and from 23° to 28° C in August. There are no significant daily fluctuations in sea water temperatures, except in very shallow waters less than one metre deep.
Source: http://www.visitcyprus.com/index.php/en/practical-information/climate-weather