In Thessaloniki and Halkidiki, the bites start at dusk. Plan your evenings around them.

Yes, mostly from dusk into the night. Thessaloniki and the Halkidiki peninsulas sit in Central Macedonia, where house mosquitoes spread West Nile to 111 people in 2026, most of them on the farm plains that visitors rarely see. Greece has had no local dengue, chikungunya or Zika, and CDC recommends no malaria medicine, so an evening repellent habit and a closed room cover the visit.

West Nile in Central Macedonia

West Nile virus travels on Culex pipiens, the house mosquito, which bites from dusk through the night. Central Macedonia had Greece's 2010 outbreak, and a study put 81.5% of the country's human cases in 2022 in the region. As of October 21, 2026, the European Centre for Disease Prevention and Control (ECDC) counted 111 locally acquired cases in the region's seven regional units, out of 457 in Greece: Imathia 39, Pella 27, Thessaloniki 19, Pieria 14, Serres 6, Kilkis 4 and Chalkidiki, which covers Halkidiki, 2.

That was a sharp rise from 2025, when the region had 5 cases and Halkidiki none, and close to 2024, when the Thessaloniki area had 23 and Halkidiki 12. ECDC counts cases by regional unit, so it isn't known whether the 19 Thessaloniki cases were caught in the city or the farmland around it. There is no vaccine, and ECDC reports most cases in men 65 and older, so older travelers should be most careful. Greece's record season centered on Athens, and our Greece briefing covers the rest of the country.

Greece's public health agency has reported occasional locally acquired malaria in rural wetland areas since 2009, including the Delta municipality west of the city, and CDC's Greece page lists no malaria medicine. On yellow fever it says "Vaccine is not recommended" and "Vaccine is not required." CDC also lists leishmaniasis, spread by sand flies that bite from dusk to dawn, and has no travel notice for Greece.

Waterfront evenings and Halkidiki nights

House mosquitoes come out just as drinks start on the Thessaloniki waterfront and dinner on the taverna terraces of Ladadika and the Upper Town, and they keep biting through the night in rooms with open windows. The tiger mosquito, which ECDC's April 2026 map shows established in Thessaloniki and Halkidiki, adds daytime bites in gardens and shade. A day of sightseeing tends to bring few bites.

Halkidiki has a reputation as good mosquito country in summer, greener than the dry south of Greece and buggier after rain. Beach-hotel gardens, pools and campsites under the pines on Kassandra and Sithonia are the likely spots, so bring your own repellent and ask for a room with screens that close properly. West of the city, the rice fields and marshes of the Axios delta are the region's big mosquito breeding ground; birders and cyclists should go in the morning, cover up and leave before dusk.

From July to September, put repellent on ankles, arms and neck before evening drinks or dinner, reapply after an evening swim, and sleep with the windows shut and the air conditioning on, or a plug-in vaporizer by the bed. Our repellent timing guide shows how long one coat lasts. June is the easiest month, and late July to mid-September carries the most West Nile risk. Mosquitoes are out from May to October, so a spring or fall trip still calls for the evening spray, with less West Nile.

Where you're going

How the city and the peninsulas compare for a June–September trip.

Flying on to Athens? Our Athens briefing covers the capital's record West Nile year. Driving north? The North Macedonia briefing covers the country next door.

What travelers report

Paraphrased from TripAdvisor threads and reviews and linked so you can read them in full. Only one is dated, to 2006, none describes the 2026 season, and bites vary with the rain, the wind and whether your window has a screen.

• Halkidiki · October · 2006

  A reviewer whose October trip was mostly overcast found the area pleasant in sunshine but said wasps swarmed in the sunny spells and the mosquitoes were worse than anywhere else they had been, and could not recommend it. TripAdvisor ↗

• Halkidiki · summer

  A longtime poster said northern Greece has more vegetation than the drier south, so there are more mosquitoes in summer, especially after rain; resorts in Halkidiki and Thassos use repellents, but guests are advised to bring their own protection and ask for screened rooms. TripAdvisor ↗

• Afytos (Kassandra)

  Asked about mosquitoes in Afytos, a reply said the warm climate and greenery all around make it a good environment for mosquitoes, and that carrying repellent is enough. TripAdvisor ↗

• Thermi dam (Panorama, near Thessaloniki)

  A reviewer who liked this countryside spot near Thessaloniki advised avoiding the dam area in the hour before dusk because of mosquitoes. TripAdvisor ↗

One rule outlasts the trip. A fever with headache, a stiff neck, confusion or a rash during or within two weeks after the trip means a doctor visit, and you tell the doctor you were in northern Greece.

Traveler questions