Heatwave Grips Greece: Temperatures Nearing 40°C and Rising

High temperatures dominated much of Greece on Friday, July 4, 2025, especially in the western and southern regions. In several areas, the mercury climbed to 38–39°C.

According to data from the National Observatory of Athens (meteo.gr), 18 weather stations recorded maximum temperatures above 37°C.

Emergency Weather Bulletin Issued

The National Weather Service has issued an emergency bulletin warning of extreme heat lasting four days, from Sunday, July 6, to Wednesday, July 9.

• The heat will intensify starting Saturday in the west and Macedonia, spreading across the country by Sunday.
• Temperatures will peak from Monday, July 7, reaching over 40°C in parts of mainland Greece, especially in the west, central, and northern regions.

Key Points:

• In coastal areas, temperatures will be 2–4°C lower than in inland regions.
• Relative humidity will remain low, between 20% and 30% during midday in central mainland areas.
• Nighttime temperatures in urban centres will remain high, hovering between 26–28°C on Monday, Tuesday, and Wednesday.

Expected Temperatures

Sunday, July 6:

• Macedonia, Thessaly, Epirus, and western Central Greece: 38–39°C, possibly 40°C in some locations.
• Eastern Central Greece and the Peloponnese: 37–39°C.
• Ionian Islands: 35–36°C.

Monday, July 7:

• Mainland Greece: 39–41°C.
• Ionian Islands, Eastern Aegean, and Dodecanese: 36–38°C.

Tuesday, July 8 & Wednesday, July 9:

• Slight cooling in the west and Ionian.
• Slight rise (1–2°C) in the east and Aegean.
• Inland mainland areas may experience 41–42°C.

Forecast for Saturday, July 5

• Weather: Mostly clear. Some local cloud development over the northern highlands by midday, with a chance of isolated showers.
• Winds:
  • West: Light, variable; occasional NW breezes (3–4 Beaufort) in the afternoon.
  • East: Northerly winds (4–6 Beaufort).
• Temperatures:
  • Mainland: 36–38°C, locally 39°C in the north.
  • Ionian & Dodecanese: 35–36°C.
  • Cyclades: Up to 29°C.

Regional Forecasts

Macedonia & Thrace:

• Winds: Variable 3–4 Beaufort; easterly breezes later in the day (4–5 Beaufort).
• Temps: 22–37°C, up to 39°C in central Macedonia. Slightly cooler in the west.

Ionian Islands, Epirus, Western Central Greece & Peloponnese:

• Weather: Mostly sunny. Some clouds over Epirus may bring brief showers.
• Winds: Variable, light. Some coastal NW winds (3–4 Beaufort).
• Temps: 23–38°C inland.

Eastern Central Greece, Euboea, Eastern Peloponnese:

• Winds: North/northeast (3–5, up to 6 Beaufort in the east).
• Temps: 24–37°C.

Cyclades & Crete:

• Winds: Northerly (4–6 Beaufort).
• Temps: 23–29°C, up to 31°C in Crete, 33–34°C in the south.

Eastern Aegean Islands & Dodecanese:

• Winds: Northerly (4–5 Beaufort).
• Temps: 23–36°C.

Thessaly:

• Winds: Light, variable. Northeastern breezes in the Sporades (3–4 Beaufort).
• Temps: 22–37°C inland, 30–31°C in the Sporades.

Attica:

• Winds: North/northeast (4–6 Beaufort).
• Temps: 24–37°C; slightly lower (by 2–3°C) in the east.

Thessaloniki:

• Winds: East/southeast (3–4 Beaufort).
• Temps: 23–36°C.