One person was taken to hospital after falling from a wall near Glyngarth.
Coastguards from Penmon were called out on Thursday afternoon following an incident near the Gazelle Hotel by the Menai Strait.
The RNLI's inshore lifeboat from Beaumaris, which was already on a training exercse, was also called away to help with the medical evacuation.
The casaulty was taken by ambulance to the green at Beaumaris, where he was transferred by the Wales Air Ambulance on their way to the hospital.
The RNLI lifeboat, which had yet to arrive at the scene, was stood down and returned to its exercise.
A spokesperson for Beaumaris lifeboat station said: "The lifeboat was tasked as a precaution in case of a delay in arrival of the road and/ or the air ambulance. Fortunately, this did not occur and our presence at the scene was therefore not required in this instance."
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