Female turtles return to shore only to lay their eggs, on the same beach where they hatched many years before. Depending on the species, the location, and the temperature, the turtle nesting season varies.
Luckily Turtle Island in Borneo is one of the few places in the world where turtles arrive 365 days of the year to nest. Both green and hawksbill turtles nest at Turtle Island in high numbers which means the chances of seeing a mother laying her eggs are high all year round. The female turtles come ashore every evening to lay eggs, and can number up to 50 at a time during peak season (between July and October). The beaches are vacated each evening so as not to disturb the turtles and to encourage the turtles to return and nest multiple times.
If you wanted to know a bit more about how often a female turtle will nest at Turtle Island most species nest several times during a nesting season every 2-4 years over the course of their lifetime. On average, sea turtles lay 110 eggs per nest, with 2 to 8 nests per season. The largest clutches are of the hawksbills, which can lay more than 200 eggs per nest.
This makes Turtle Island a great place to visit if watching a turtle nest (an amazing experience) is on your 'must-see' list when coming on holiday to Borneo.