Intense heat continues across Greece during the final week of August, with temperatures having already reached or exceeded 40°C in several areas. On Tuesday, 25 August 2026, conditions will remain largely unchanged, as thermometers climb to 39°C in parts of mainland Greece.
Regional Forecast
According to the Hellenic National Meteorological Service (EMY), temperatures across inland regions will hover between 37°C and 38°C — locally reaching 39°C. In the island regions, readings will range from 34°C to 36°C, rising to 37°C in eastern islands. Cloud cover is expected over mainland areas during midday and afternoon hours, with isolated showers or thunderstorms possible over mountainous terrain — especially in northern regions.
Winds will blow from northerly directions: 3–4 Beaufort in western areas, strengthening to 4–6 Beaufort in the east — locally reaching 7 Beaufort across the Aegean Sea.
Macedonia & Thrace
Generally clear skies, with brief cloud development during midday and afternoon hours. Localized rain or thunderstorms are possible over mountains. Winds will be variable at 3–4 Beaufort, shifting to easterly or north-easterly up to 5 Beaufort in eastern zones. Temperatures will range from 20°C to 36°C — peaking at 37–38°C in central Macedonia.
Ionian Islands, Epirus, Western Sterea, Western Peloponnese
Mostly sunny, with temporary clouds developing over mountains in the afternoon — potentially bringing isolated showers. Winds will be north-westerly at 3–4 Beaufort. Temperatures will range from 24°C to 36°C — up to 38°C inland in Epirus, where overnight lows may be 2–4°C cooler than daytime highs.
Thessaly, Eastern Sterea, Evia, Eastern Peloponnese
Generally clear, with passing afternoon clouds over inland and mountainous areas — raising the chance of isolated showers. Northerly to north-easterly winds will reach 3–4 Beaufort, increasing to 5–6 Beaufort in eastern zones by afternoon. Temperatures will range from 24°C to 38°C — locally hitting 39°C.
Cyclades & Crete
Clear skies dominate. Northerly winds will blow at 5–6 Beaufort, locally intensifying to 7 Beaufort. Temperatures will range from 25°C to 31°C — reaching 34–35°C on Crete.
Eastern Aegean Islands & Dodecanese
Mostly clear. Northerly winds at 5–6 Beaufort, locally gusting to 7 Beaufort. Temperatures will range from 26°C to 36°C — reaching 37°C in some locations.
Attica
Generally clear, with occasional short-lived clouds during midday and afternoon. Northerly to north-easterly winds will range from 3–4 Beaufort — increasing to 5–6 Beaufort in eastern suburbs by afternoon. Temperatures will range from 25°C to 38°C, with coastal areas staying 2–3°C cooler.
Thessaloniki
Mostly sunny, with brief cloud cover in the afternoon — possibly triggering isolated mountain showers near the city. Winds will be variable at 2–4 Beaufort, shifting to southerly in the afternoon at similar intensity. Temperatures will range from 23°C to 35°C.