13th Beach • Surf Spot Statistics

Best Surf Season (April - September)

13th Beach is a classic Southern Ocean-influenced stretch of sand, and the heart of the surf year runs from April through September. As autumn sets in, the westerly storm track shifts north and the Bass Strait gets an almost endless supply of long-period SSW and SW groundswell. At the same time, the inland temperature contrast sets up more frequent offshore flow from the N, NNE, NE and NNW quadrants. This is the sweet spot: average wave heights sit between 5ft and 6ft (1.5-1.8m), periods stretch to 12-12.6s, and ideal offshore wind frequencies climb to 23-29%. The waverose is dominated by SW-SSW pulses, with the best months seeing a high percentage of groomed, powerful, long-period beachbreak waves. Water temps in July and August bottom out around 11.2°C, so full winter rubber is mandatory, but the quality more than justifies the cold.

Fair Surf Season (March, October & November)

The shoulder months are transition periods where 13th Beach can still deliver excellent sessions, but with less consistency. March is the first real upgrade from summer, with periods climbing above 11.9s and the onshore seabreeze starting to weaken. October retains the long-period winter swell - often some of the biggest groundswell of the year - but the daily onshore cycle begins to re-establish itself, and ideal wind frequencies drop to around 20%. November is the tail end of the shoulder, as the S/SSE seabreezes become more persistent and the average period dips back to 11.5s. These months are all about timing: catch a clean morning before the seabreeze, or a window when a strong high-pressure system holds the northerlies in place.

Low Surf Season (December - February)

Summer is the annual low tide for surf quality at 13th Beach. December through February brings a persistent daily S to SSE seabreeze that blows straight onshore into the SSW-facing beach. Onshore wind frequencies jump to a seasonally dominant 45-50%, while offshore flow from the north and northwest drops to just 11-12%. The average wave period falls to 11.1-11.3s, and although SW and SSW groundswell still appear on the charts, the combination of shorter-period swell and a daily afternoon chop makes for messy, junky conditions. The saving grace is the early morning, when the seabreeze is still asleep and a clean 3-5ft (1-1.5m) SW groundswell can be absolutely fun. Water temps climb to a warm 19-21°C, making it the most comfortable time of year for a paddle, but surfers need to hunt hard for the limited windows.