According to expert meteorologists Theodoros Kolydas and Klearchos Marousakis, Greece is currently experiencing a temporary easing in wind intensity and a modest temperature rise. However, this calm pattern is not expected to last. By the weekend, a notable atmospheric disturbance will bring cooler temperatures, increased wind speeds, and heightened instability across much of the mainland.

Short-Term Forecast: Gradual Warm-Up Before a Weather Reversal

• Theodoros Kolydas, former director of the Hellenic National Meteorological Service (HNMS), notes that winds will gradually weaken through midweek, with a slight uptick in temperatures. By the weekend, however, stronger winds are forecast to return, accompanied by a temperature drop of approximately 3°C.
• Kolydas highlights increased atmospheric volatility beginning Friday, especially in continental regions, with scattered rain continuing into Saturday.

Marousakis: Heatwave Peak Followed by Cold Trough Intrusion

• Klearchos Marousakis adds that Thursday and Friday will mark the peak of a heatwave, followed by a rapid change in weather as a cut-off cold low—a mass of colder air aloft—moves from central Europe toward the central Mediterranean.
• This “cold lake”, forming over Italy, will disrupt the general atmospheric flow and funnel cooler air masses southward, setting the stage for destabilized conditions, scattered storms, and a return to seasonal or below-normal temperatures by the weekend.

High Fire Risk Alert in 13 Areas

The General Secretariat for Civil Protection has issued a Category 3 (high) fire risk warning for Tuesday, June 17, in the following regions:

• Attica, southern Evia, Argolida, parts of Corinthia
• Crete, Karpathos, Kassos, Cyclades
• Lesvos, Chios, Psara, Samos, Ikaria

➡️ View the full Fire Risk Forecast Map at civilprotection.gov.gr.

Wind Patterns Visible from Space

Recent Sentinel-3 satellite imagery from June 15, 2025, reveals the dramatic effect of strong northerly winds (meltemi) across the eastern Aegean. Wind gusts exceeded 80 km/h, sculpting distinctive patterns on the sea surface. These images, processed by the METEO unit of the National Observatory of Athens, demonstrate the value of satellite technology in real-time monitoring of high-impact weather systems.

Detailed Weather Forecast: Day-by-Day

Tuesday, June 17

• Weather: Mostly clear skies with localized afternoon clouds and isolated thunderstorms over the Pindos mountain range, Thessaly, and the Peloponnese.
• Temperature: Highs of 34–36°C in Thessaly; cooler in the Ionian and Aegean Islands.
• Winds: North in the Aegean (up to 6 Beaufort); west-northwest in the Ionian (4 Beaufort).

Wednesday, June 18

• Conditions: Partly cloudy in western/northern mainland; scattered rain in Epirus and Western Macedonia.
• Winds: North winds persist in the Aegean (up to 6 Beaufort).
• Temperature: Slight rise, with highs reaching 35°C in the mainland.

Thursday, June 19

• Weather: Mostly clear, with isolated afternoon storms over northern mountains.
• Winds: Westerlies in the west, northerlies in the east, and Aegean.
• Temperature: Further slight increase.

Friday, June 20

• Conditions: Afternoon storms are expected in mainland Greece and Evia, particularly over high terrain.
• Winds: Variable inland; northerly winds up to 5 Beaufort in the Aegean.
• Temperature: Stable.

Saturday, June 21

• Weather: Localized thunderstorms in Central Macedonia and Thessaly; clearer elsewhere with isolated mountain showers.
• Winds: Intensifying northerlies, peaking at 6 Beaufort in the Aegean.
• Temperature: Slight decline, especially in the north.

Final Note

This week will be characterized by a transitional weather pattern: warming conditions early on will give way to significant weekend volatility, driven by an upper-level trough. Residents and visitors should remain vigilant for changing conditions, especially in fire-prone and mountainous areas.

For continuous updates, follow @KolydasT, @klearchosweather, and @meteo_gr on social media, or consult the HNMS and Civil Protection Authority websites.