Christmas Island National Park

Christmas Island has fantastic weather all year around, with little variation in temperatures throughout the year.

Temperatures reach an average high of 28°C in April and an average low of around 22°C in August. Humidity is lowest during the middle of the year (dry season), while you might get some showers from November to April (wet season).

Most of the island’s activities can be enjoyed all year round, including diving, snorkelling, bushwalking, birdwatching and golf.

When to see the red crab migration

Possible red crab spawning dates for 2019/20

Red crabs spawn during the last quarter of the moon at the start of the wet season.

We can’t predict exactly when the crabs will spawn, but the regular cycles of the moon mean we can narrow it down to a few possible dates.

Possible spawning dates for 2019

  • 22–24 November 2019
  • 21–23 December 2019

Possible spawning dates for 2020

  • 11–13 October 2020
  • 10–12 November 2020
  • 9–11 December 2020

The crabs will start migrating 4–5 weeks before the spawning date in response to suitable rainfall.

The red crab migration and spawning is a spectacular bucket-list event that you don’t want to miss. The crabs start marching to the ocean to spawn at the start of the wet season, usually around October or November.

A month after spawning, the baby crabs emerge from the ocean and head for the forest. When baby numbers are high, this part of the migration is even more spectacular than the event that spawned it.