True Seers are very rare, and Professor Trelawney...
MINERVA MCGONAGALL BEING DUBIOUS ON SYBILL TRELAWNEY'S INGENUITY AS A SEER
A Seer was a gifted wizard or witch who had the ability to see into the future with their Inner Eye.
Description
Seers predicted prophecies, which were then recorded and stored in the Hall of Prophecy in the Ministry of Magic's Department of Mysteries.
According to Minerva McGonagall, true Seers were extremely rare, and she had doubt that Sybill Trelawney could be considered as one despite her sporadically accurate predictions.
Albus Dumbledore once told Harry Potter that seeing into the future was incredibly difficult because of the complexity of every single action and their consequences.
Centaurs were Seers with their own brand of Divination, which differs from that of humans.
Known Seers
Cassandra Vablatsky
Sybill Trelawney
Gellert Grindelwald
Calchas
Cassandra Trelawney
Inigo Imago
Professor Mopsus
Johan Hoffman
Susie Sooth
Tycho Dodonus
Canadian Seer
Female Seer
Male Seer
Liz Tuttle's mother
Divination
Professors: Sybill Trelawney · Firenze
Known Seers: Calchas · Cassandra Vablatsky · Cassandra Trelawney · Gellert Grindelwald · Inigo Imago · Johan Hoffman · Liz Tuttle's mother · Mopsus · Professor Mopsus · Susie Sooth · Tycho Dodonus · Unidentified Canadian Seer · Unidentified female Seer · Unidentified male Seer
Textbooks: The Dream Oracle · Unfogging the Future
Methods: Astrology · Bibliomancy · Cartomancy · Catoptromancy · Crystal-gazing · Crystal ball · Dream interpretation · Fire-omens · Heptomology · Ichthyomancy · Myomancy · Ornithomancy · Ovomancy · Palmistry · Scrying mirror · Tarot cards · Tessomancy · Xylomancy
Divination at Hogwarts: Divination (class) · Divination Classroom · Divination staircase · Sybill Trelawney's office · Classroom 11 · Xylomancy (class)