Kogin Tweed ƙaramin kogi ne na hakika Marlborough a gundumar a kan da Kudancin tsibirin wanda yake yankin New Zealand.

Yana zubar da tafkin McRae, Carters da Robinson Saddles a gefen kudu maso yamma na Inland Kaikoura Range kuma yana ciyarwa cikin kogin Waiau Toa / Clarence . Kogin Tweed yana cikin iyakokin tashar Molesworth .