Question:
Is it okay to visit a grave every so often?

Answer:
“When the Sabbath was past, Mary Magdalene, and Mary the mother of James, and Salome, had bought sweet spices, that they might come and anoint [the body of Jesus]” (Mark 16:1). These ladies received a great blessing as a result of their desire to visit their Lord’s tomb and to honor Him by anointing His body.

It would certainly seem to be appropriate to visit a loved one’s grave if this helps one to work out his/her grief in the loss of the loved one and to remember that person.
At the same time, if the one who died was saved, we know that the soul and spirit are not in the grave but are now “present with the Lord” (2 Corinthians 5:8), and we can look forward to the day when we, too, shall be present with the Lord and reunited with our loved one who has died. If the grave marker has a Scripture verse or some other testimony to Christ, it is well to visit the grave periodically to make sure that the site is cleared of weeds and debris.