The pair tied the knot in April but had to delay their romantic break because of work commitments.
Speaking to People magazine at the time, Rimes said, 'We have to go back to work right away. The next four to five weeks hopefully, we'll be able to take a honeymoon. That's the plan.'
But they were spotted walking hand-in-hand along the beach in Cabo San Lucas, Mexico on Monday, where they are staying at the Esperanza Resort, and Rimes took to Twitter to share her holiday excitement.
'Beautiful night on the beach!!!!' she wrote. 'Going to sleep to the waves tonight!!!!'
'We've been out for 2 hrs on the beach and in the pool!'