Ash Pennell, a former curator at the society's Beverly Begg Observatory, has received more than a dozen telephone calls and other inquiries about sightings.
Venus could be seen as a high, bright crescent about 30 degrees from the Sun in mid-afternoon, and gradually moving towards the western horizon.
For the next two weeks, it could be seen setting in the west several hours after the Sun.
Venus was also moving closer to the Earth, and on October 29 would reach a position called the inferior conjunction, or closest point to Earth, he said.
Venus was about 63 million km away, and was looking like a crescent Moon past last quarter, becoming a brighter and thinner crescent as it approached, he said.
Jupiter, the gas giant, is also clearly visible at night, the brightest object in the northern sky, and last month was the brightest it had been for more than 50 years, astronomers said.
This yellow planet, the largest in the solar system, can be seen to the northeast, after 8pm, rising from about 20 degrees above the horizon, to about 60 degrees by midnight, Mr Pennell says.
Jupiter appeared nearly as bright as Venus, although it is about nine times further away.
