Which Syros beach is calm today? On Syros the wind, not the map, decides where you swim. The Meltemi — the dry northerly that blows across the Aegean from late May to early October — is funnelled between Tinos and Mykonos and strikes Syros from the north-northeast, so the south-coast coves stay glassy while the east coast turns to whitecaps. The rule is simple: in a Meltemi, drive south to Vari, Achladi, Megas Gialos or sheltered Galissas; when a rare south wind (sirocco) arrives, flip it and head north-west to Delfini or Kini. Vari is the ultimate refuge — its deep, south-facing horseshoe bay stays bathtub-calm even at Force 7 when the north coast is unswimmable, with free parking and shallow water for children. Galissas is the most reliable all-rounder because a headland topped by the Agia Pakou chapel blocks the N/NE wind, and it has the island's largest free lot. Agathopes and Finikas are south-west Blue-Flag bays well out of the northerly fetch, so they fill fast on windy days; arrive before noon. Kini, a west-coast sunset favourite, holds up to Force 5 but a Force 6+ north wind wraps the headland and blows sand. Azolimnos, the closest sandy beach to Ermoupoli at about 5 km, faces the Tinos–Mykonos strait and becomes a windward trap in the Meltemi — use it on calm days only. The wind has a daily rhythm: lightest at dawn, building through late morning and peaking from about 14:00 to 18:00, so swim early and keep the windy afternoon for the most sheltered southern coves. Distances are approximate drive figures from Ermoupoli port. Most beaches — Vari, Galissas, Kini, Finikas, Agathopes and Megas Gialos — are reached on paved roads suitable for any compact car, and parking at the beaches is free. The exceptions are Delfini and Kokkina, reached by dirt tracks, and the whole northern Apano Meria region: Greek rental contracts exclude unpaved roads from the Collision Damage Waiver, so driving there voids your insurance and exposes you to an excess of roughly €400–900 for economy cars or €1,200–1,900 for SUVs. Park at the paved end and walk. In central Ermoupoli a controlled port zone charges about €0.50–2.00 per hour and tows aggressively in pedestrian lanes, but beach parking elsewhere is genuinely free. Note the 2026 rule change: Greece's new Highway Code, Law 5209/2025 (in force 13 September 2025), abolished the old 50% early-payment discount, so fines are now paid in full within two months via gov.gr. That is the traffic code, not Law 5092/2024, which governs beach sunbeds and coastal access.