Operational aviation weather overview for Greek FIRs covering 16 – 22 August 2026. Peak late-summer high-pressure dominance across mainland FIRs keeps daytime temperatures elevated, requiring continued density altitude monitoring at Athens (LGAV) and Thessaloniki (LGTS). Simultaneously, active Meltemi wind regimes deliver steady northerly flow across Aegean island gateways at Heraklion (LGIR) and Rhodes (LGRP), ensuring clear skies and predictable VFR operational conditions.