Temperatures in Greece are expected to remain high until Saturday, according to meteorologist Nikola Ziakopoulou. However, a significant drop in temperatures is predicted for Sunday and Monday, with strong north winds, rain, and even snow at lower altitudes, especially in northern regions. The forecast for Thursday indicates cloudy weather with minor rains in the west and eastern Aegean, while Attica will experience brief clouds and mild temperatures. Friday will see similar conditions with local clouds and fog.