While the North Shore was featuring waves with 12-foot faces yesterday, the South Shore weighed in with 15-footers and a high-surf warning from the National Weather Service.

Forecaster Tom Birchard said it's not that unusual to have high waves on both the North and South shores at this time of year.

Birchard said the South Shore surf should peak tomorrow and diminish Friday. On either shore, residents and visitors are urged to stay out of the water while surf is big because of dangerous wave action and strong rip currents.

Reach Will Hoover at whoover@honoluluadvertiser.com.