The phrase "accurately guess" is correct and can be used in written English.
It means to make a prediction or estimate with a high level of accuracy or correctness. Example: The meteorologist was able to accurately guess the weather forecast for the weekend based on the current atmospheric conditions.
How the heck can you accurately guess when you'll die?
Is it possible for people to accurately guess the pain number associated with each photo?
Children who accurately guess how much was in their piggy bank get a prize, and free lollies are handed out when the coins are exchanged for banknotes.
But the data needed to create software that can accurately guess at an individual cop's future actions is surely much scarcer.
At the bar, they made a bet over which of them could accurately guess from their vantage point what it was that another table of guests was snacking on.
Still, though polls will not perfectly predict the US election, state by state and down to the decimal point, they are likely to accurately guess who will win nationally, especially if Clinton has a large enough lead.
"Bologna on white," Lily accurately guesses, in a moment meant to reveal her deep grasp of human nature.
In four separate experiments, participants more accurately guessed the pictured emotion based on body language — alone or combined with facial expressions — than on facial context alone.
He accurately guessed what audience members were thinking about (a dead cat called Candy), what actress Angela Griffin had in a sealed box (some big school pants, a piggy bank decorated by her daughter).
A few people have accurately guessed Ruth Bourdain's identity, but Mr. Friedland managed to deflect them, often changing his cellphone number, using voice-cloaking software to do radio interviews in character, and compelling editors and some reporters to sign nondisclosure agreements.
Accurately guessing when an approaching object will hit you is an important survival skill.
