Moonstone beach 5-Day Forecast Summary
Here's how the next 5 days are shaping up at Moonstone beach, Northern California. Each day is rated based on breaking wave height, swell period, and wind — updated hourly from the latest NOAA GFS run.
Sat, May 16: 5–6ft, 14s period, rated Poor. First light looks cleanest — 3-4ft on WNW swell at 7s with 9mph N winds. Wind fills in through the day, pushing up to 18mph from the N and dropping conditions to poor.
Sun, May 17: 6–7ft, 13s period, rated Poor - Fair. Early morning is your best window — 8-9ft waves on WNW swell at 12s with 13mph out of the N. The N wind kicks in by afternoon — 20mph and poor - fair by then.
Mon, May 18: 6–7ft, 9s period, rated Poor - Fair. Dawn patrol is the move — 7-8ft on NW swell at 8s with light ENE winds. The NNW wind kicks in by afternoon — 15mph and poor - fair by then.
Tue, May 19: 5–6ft, 15s period, rated Fair. First light looks cleanest — 7-8ft on NW swell at 8s with light ENE winds. Onshore flow builds through the day to 8mph, bringing conditions down to poor - fair.
Wed, May 20: 6–7ft, 14s period, rated Fair. Early morning is your best window — 6-7ft waves on NW swell at 8s with barely a breath of wind. The WNW wind kicks in by afternoon — 7mph and fair by then.