Overview
- Early June ensemble output from ECMWF, Copernicus C3S and supporting NOAA guidance shows a high probability of a warmer‑than‑normal June–August across Italy and the Adriatic with long high‑pressure spells.
- Southern regions such as Sicily, Calabria and Apulia are likely to see repeated daytime highs above 40°C and tropical nights that stay near or above 22°C, creating clear health risks for vulnerable people.
- Adriatic sea surface temperatures are trending up and are forecast to reach about 28–29°C in many areas in mid‑to‑late summer, with even higher values in shallow bays that reduce cooling for swimmers.
- The hot, locked‑in pattern will supply energy for abrupt convective outbreaks so that after heat episodes northern Italy, the Alpine edge and some coastal zones face a higher risk of heavy rain, hail and damaging gusts.
- Medical and travel guidance is to avoid midday sun, plan activities for early morning or evening, monitor weather warnings and build flexibility into trips because rising background temperatures make extremes more likely.