Batumi Coast

Georgia's Black Sea coast is, in the astronomical sense, non-tidal. The gravitational tide range is under 10 cm — below the noise floor of wave action and atmospheric forcing. What drives water level here is wind. A sustained onshore southwesterly pushes 20–30 cm of setup against the coast; a prolonged offshore wind drains it. The Batumi coast is subtropical by Caucasus standards: palms line the Boulevard, summer sea temperatures reach 26–28 °C, and the beaches are wide grey-sand and pebble strips. Batumi itself is a major port and rapidly expanding resort city. Poti, 75 km north, sits at the mouth of the Rioni River with freshwater influence shaping its nearshore environment. Kobuleti occupies a long sandy peninsula 20 km north of Batumi, the quieter alternative to the city beach.