They are fairly fine with low light, but they can't see well in pitch blackness as people can. Guinea pigs have very limited vision at night.
Guinea pigs sleep at night and are most active during the day, so having good night vision is unnecessary. Have you ever seen your Guinea Pig roaming around the cage or house at night?
Nocturnal animals absorbs light but replaces it rapidly, allowing the eyes to perform well at night.
The question is, how well can a guinea pig see at night? Scientifically, it is not entirely clear how well a guinea pig sees in the dark, but we do know they can navigate in the dark.
Although guinea pigs are diurnal, they may have some degree of night vision. The guinea pig relies on scent and memory to compensate for its limited night vision.
A guinea pig's eyes are set on the side of its head, allowing it to see over 340 degrees. This wide field of vision is perfect for spotting any creature, but it impairs in-depth vision.
How do Guinea Pigs compensate for their poor vision? The guinea pig relies on memory and scent to navigate in the dark - this is also true during the day!
Due to guinea pigs' poor vision, they rely heavily on signs and scents to navigate their surroundings during the daytime as well.
Summary of your Guinea Pig's Observations: Your guinea pig can see in the dark, and while that vision is limited, it gets support from the sound, memory, and tactile whiskers on its muzzle.