A weak low-pressure system is affecting the area, bringing mostly stable conditions overnight, followed by increasing instability from Tuesday onwards.
Tonight, conditions will be mostly clear. However, coastal areas may see periods of low cloud or patchy mist. Winds will be mainly northwesterly to northeasterly, and locally southeasterly in the northwest, remaining light at around 3 Beaufort. The sea will be calm to slightly rough. Temperatures will fall to around 15°C inland, 16°C along the coast and 8°C in higher mountainous areas.
On Tuesday, after early morning mist and low cloud clear, the weather will become mostly fine. Later in the day, cloud development is expected to bring isolated showers or thunderstorms, mainly over mountainous regions and inland areas. Winds will shift from southwesterly to northwesterly, initially light to moderate at 3 to 4 Beaufort, strengthening locally to 4 to 5 Beaufort. The sea will be calm to slightly rough, becoming locally slightly rough later. Temperatures will rise to around 29°C inland, 24°C along the southern, eastern and northern coasts, 23°C on the western coast and 18°C in the higher mountains.
Tuesday night will be mostly clear, although some areas may again see low cloud or mist. Winds will remain light at around 3 Beaufort, with the sea slightly rough.
From Wednesday through to Friday, intervals of increased cloud cover are expected. During the afternoon hours, cloud build-up is likely to bring isolated showers or thunderstorms, particularly in mountainous and inland areas.
Temperatures are not expected to change significantly through Friday, remaining close to average seasonal levels.