Kedah

Kedah sits on the northwestern coast of Peninsular Malaysia, sharing the Thai border at the north and running south along the Strait of Malacca toward Penang. The state's coastline includes the long mainland paddy-belt shore around Kuala Kedah and the Langkawi archipelago of 99 islands sitting offshore in the Andaman Sea. The tide signature varies between the mainland coast inside the strait and the offshore islands of Langkawi exposed to the open Andaman. Mean range on the Langkawi side runs around 2.0 to 2.7 metres, larger than Penang to the south because the Andaman exposure carries more open-ocean tidal energy than the funnelled strait. Spring tides around new and full moons can push toward 3.0 metres; neaps compress toward 1.5. The pattern is semidiurnal — two highs and two lows about twelve and a half hours apart. Kuah jetty on the southeastern coast of Pulau Langkawi handles the ferry traffic from Kuala Perlis and Penang. The Kilim Geoforest Park on the eastern coast runs mangrove-channel tours that depend on the tide for navigation through the limestone karst lagoons. Pantai Cenang on the western coast is the main beach strip and the local sailing centre. Pulau Dayang Bunting, the second-largest island in the archipelago, contains a freshwater lake separated from the sea by a thin limestone wall. The Mahsuri tomb at Kampung Mawat is one of the oldest cultural sites on the island. Anglers work the channel between Pulau Tuba and Pulau Dayang Bunting for grouper and snapper on the changing tide. The Department of Survey and Mapping Malaysia (JUPEM) and the National Hydrographic Centre publish the authoritative Malaysian tide tables. Open-Meteo Marine drives the gridded predictions on this site.