Tomorrow, Friday 15 May, much of Greece will see increased cloud cover with scattered rain showers or thunderstorms, according to the Hellenic National Meteorological Service (EMY). The detailed forecast indicates that clouds will temporarily thicken across the country, bringing isolated rain or thunderstorms — especially during the early morning hours in western Greece and central Macedonia, and again in the afternoon across other inland mountainous areas.
Visibility and Fog
Visibility will be locally reduced during early morning and evening hours over inland regions, where fog is expected to form overnight and into the morning.
Winds and Temperatures
Winds will blow from the west and southwest at 3–5 Beaufort, reaching up to 6 Beaufort locally in southern areas before easing by nightfall. Temperatures will remain largely stable: highs of 22–24°C in western and northern Greece; 24–25°C elsewhere; and up to 26°C in parts of eastern mainland Greece.
Macedonia and Thrace
In Thrace, skies will be mostly clear. Elsewhere in the region — including central and western Macedonia — cloud cover will increase temporarily during the afternoon and evening, bringing isolated rain or showers, and possibly isolated thunderstorms in mountainous zones. Winds will be variable at 3–4 Beaufort, shifting to southerly or south-easterly in the afternoon at similar intensity. Temperatures will range from 11°C to 23–24°C, dropping 2–3°C in western Macedonia.
Ionian Islands, Epirus, Western Central Greece, Western Peloponnese
Clouds will periodically thicken, especially in the early morning over coastal and marine areas — bringing isolated rain or thunderstorms — and again in the afternoon and evening over inland mountainous zones. Winds will be westerly to south-westerly at 3–5 Beaufort, turning southerly by night at the same strength. Temperatures will range from 12°C to 24–25°C, falling 3–4°C in inland Epirus.
Thessaly, Eastern Central Greece, Evia, Eastern Peloponnese
Skies will start mostly clear, with clouds increasing briefly during the afternoon and evening — leading to isolated rain or showers, and possibly isolated thunderstorms in higher elevations. Winds will be variable at 3–4 Beaufort, becoming westerly to south-westerly at 4–6 Beaufort in southern areas before weakening overnight. Temperatures will range from 10°C to 25–26°C.
Cyclades and Crete
Cloud cover will be light and intermittent, occasionally thickening. Winds will come from western directions at 4–6 Beaufort. Temperatures will range from 17°C to 23°C, reaching up to 25°C in parts of Crete.
Eastern Aegean Islands and Dodecanese
Skies will be partly cloudy, with occasional thicker cloud patches. Winds will be westerly to south-westerly at 4–5 Beaufort, reaching 6 Beaufort locally in the Dodecanese. Temperatures will range from 14°C to 22–23°C, climbing to 25°C in some southern areas.
Attica
Cloud cover will be light and intermittent, occasionally intensifying. Winds will be westerly to north-westerly at 4 Beaufort in the morning, shifting to southerly in the afternoon at the same strength. Temperatures will range from 15°C to 25°C, reaching 26°C locally.
Thessaloniki
Skies will be mostly clear with occasional cloud increases, bringing brief, isolated rain or showers — first in the morning and again in the afternoon and evening.