Finally it ends in a swampy delta by the town of Samut Songkhram and empties into the northwestern shore of the Bay of Bangkok, Gulf of Thailand.

[2] The Mae Klong river basin has a tropical savanna climate, and is subject to two major thermal systems, the southwest and the northeast monsoons.

The southwest monsoon brings moisture up from the Indian Ocean beginning in May and climaxing with heavy rains in September and October.

[4][5][6][7] It was later attributed to molasses waste water which leaked from a sugar/ethanol factory in Ban Pong District of Ratchaburi Province on 30 September that continued until 7 October.

The Pollution Control Department will sue Rajburi Ethanol Co for allowing molasses wastewater to leak.