Conditions at Ikumi in December
December: Long Periods Under Wintry Skies
December rounds out the calendar with a return to winter monsoon patterns. The wind is dominated by WNW (18.9 percent), NNW (16.1 percent), and NW (12.9 percent), making for frequent offshore and cross-offshore conditions; ideal wind is 21 percent. The swell is comparatively small - average height 2ft (0.6m) - but period remains long at 9.2s, giving the waves a clean but underpowered feel. The favourable window still contributes 36.7 percent of total swell (ESE 25.1 percent, E 8.6 percent, ENE 2.4 percent, NE 0.6 percent), while SE (17.2 percent) and WSW (8.5 percent) are secondary. The combination of long period and offshore wind means that on the best swells, the consistency and shape can be surprisingly good for such small sizes - ideal for a mid-length or a slightly bigger board. Air temperature plummets to 10.8°C, water is 18.7°C, and precipitation is low at 2.51 mm/day. December is the last call for quality waves before the deep winter lull of January.
Average Spot conditions at Ikumi in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Ikumi during December. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Ikumi for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ikumi for December. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Ikumi.