Surf at Castor, located at Zone 4 near Lanuza elementary school, is named after the landowner. This spot generally offers some good surf, especially at high tide. It's known for its rocky reef, which can be quite sharp and shallow, so surfers need to be cautious when paddling out. It's right in front of the Lanuza Surf Camp, making it accessible for those staying nearby.

Castor is recognized for its gnarly left-handed waves that break primarily over an uneven reef, but there are also some rights to consider. The best swell directions are from the North and Northeast, handling sizes around 2ft (0.6m) effectively. High tide is the sweet spot here, with South winds being ideal to keep the faces clean. This spot is generally recommended for expert surfers, as the waves can be challenging and require good skill to navigate.

When planning your surf session, keep in mind that this spot is further enhanced by its preferred wind conditions and tide heights. Make sure to check the swell forecast beforehand to catch it at its best. Overall, it’s a solid choice for experienced surfers looking for a bit of a challenge.