From about November to March, ʻEhukai is a viewing platform, not a beach you use.
What is safe: standing on the dry sand well back from the water, watching, taking photographs, sitting in the shade of the ironwoods.
What is not: wading, paddling, letting a child play at the waterline, standing with your back to the ocean, or swimming under any circumstances when swell is running.
The specific hazard is the shorebreak. Waves here do not roll up a gentle shelf; they pitch and land on a steep sand face very close in. That mechanism drives people head-first into the sand, which is why the injuries reported on this coast skew towards necks, shoulders and collarbones rather than drownings. Add a lateral current strong enough to move an adult two hundred metres in minutes and you have a beach that punishes ordinary carelessness.
The lifeguards here are among the busiest in the state. When a tower posts a closure, it is closed. When a guard walks down and asks you to move back, move back. There is no negotiation at ʻEhukai in January, and the crews who ask are the ones who will have to come and get you.