Tide
Rise and fall of the sea level, about twice a day. Each spot works best at a certain stage of the tide.
Other terms
Bathymetry · Beach break · Breaking height · Confidence · Cross-shore wind · Crossed swells · Ensemble forecast · Forecast model · Gusts · Iribarren (breaker type) · Offshore wind · Onshore wind · Peak period · Period · Persistence · Point break · Range · Reef · Rip currents · Seabed relief (EMODnet) · Set · Shorebreak · Submarine canyon · Swell · Swell direction · Tidal range · Tide coefficient · Wind sea