October in Point Calimere is the build-up month before the season reopens. The NE monsoon arrives in force from mid-month — 250-350mm of rain across 12-14 wet days recharges the lagoon system rapidly. By the third week of October, lagoon water levels hit 70-90 percent capacity and the Great Salt Swamp returns to its NE-monsoon-fed Ramsar wetland state. The first migratory flamingo arrivals typically come late October as the Rann of Kutch return-migration begins. TN Forest Department conducts pre-reopening surveys mid-October; the sanctuary typically reopens for visitors in the first or second week of November once the flamingo population reaches a threshold (~5,000+ birds) and lagoon levels stabilise. Cyclone watch on the Coromandel coast at peak — Cyclone Thane hit Cuddalore (130km north) on December 30, 2011; Cyclone Gaja landed directly at Vedaranyam (16km north) on November 16, 2018. The Forest Department's reopening is conditional on cyclone-watch clearance. For birders aiming for first-reopening: monitor TN Forest Department announcements via forests.tn.gov.in. The strong call: mid-November onward.

Why October scores 4.0/10