Estonian developers called Shaka company presented their revolutionary devices known as Shaka Wind Meter and Shaka Weather Station. The device looks like a small key chain in the shape of propeller. The software that does the measuring is available online as a free application.
Meltemi, summer northerly winds, are characteristic for Greek islands. They generally blow from June and July till the end of of September and the beginning of October. Sometimes the meltemi can reach up to 7 or 8 on a Beaufort scale. Be sure to check the weather forecast.