Used to say that something is likely to happen, though not completely certain.
“Since the man is holding an umbrella, it will probably rain in a few minutes.”
“The kids are running toward the pool, so they will probably jump in soon.”
In Speaking Task 4, you must predict what happens next in a picture, and 'will probably' is one of the safest and most natural ways to make a prediction without sounding too certain. Use it right after describing what you see in the image, e.g., 'Since the sky is getting dark, it will probably rain soon.' Examiners want to hear clear future predictions, so pair this phrase with a reason from the picture to sound confident and logical.
Synonyms: is likely to, will likely, is probably going to