Onjuku 61.8
#3368 of 5753 surf spots in the world · 🇯🇵 Japan · Chiba · near Kawasaki
Works almost every day, wind is the enemy here, no off season.
Works all yearIntermediate
Surf score61.8 /100
Surfable days98% of the year
Clean days9% groundswell + friendly wind
Groundswell11% period 11 s+
Typical size1.6 m 5.4 ft median
Water21°C a 2 mm shorty
Best time to surf Onjuku
The best time to surf Onjuku is January, September, October. It rarely works. In January the water sits around 17°C, so pack a 3/2 wetsuit, and the typical wave is 1.8 m. The nearest airport is NRT (64 km) and the nearest town is Kawasaki (70 km).
| Month | Surfable | Clean | Size | Water | Suit |
|---|---|---|---|---|---|
| Jan | 97% | 22% | 1.8 m | 17°C | 3/2 |
| Feb | 99% | 9% | 1.8 m | 16°C | 4/3 |
| Mar | 97% | 5% | 1.9 m | 15°C | 4/3 |
| Apr | 97% | 7% | 1.8 m | 17°C | 3/2 |
| May | 100% | 0% | 1.5 m | 19°C | 2mm |
| Jun | 100% | 4% | 1.4 m | 22°C | vest |
| Jul | 99% | 4% | 1.4 m | 26°C | boardies |
| Aug | 98% | 8% | 1.4 m | 27°C | boardies |
| Sep | 98% | 13% | 1.6 m | 26°C | boardies |
| Oct | 97% | 13% | 1.9 m | 24°C | vest |
| Nov | 99% | 11% | 1.7 m | 21°C | 2mm |
| Dec | 99% | 13% | 1.8 m | 20°C | 2mm |
Why 61.8
Seven parts, each normalised 0 to 1 and weighted; the sum is scaled so the best spot in the world is 100.
Consistency 26%
26.0
Clean days 24%
4.7
Groundswell 12%
1.8
Season spread 10%
10.0
Wave size 8%
4.8
Water comfort 10%
5.6
Access 10%
7.3
The detail
Faces 155° with 33% open water around it. Friendly morning wind 80% of days. Mean peak period 8.9 s. Days over 3 m: 8%. Mellow days (0.4 to 1.2 m): 21%. Months that work: 12 of 12. Coordinates 35.187, 140.350 (OpenStreetMap).
Spots nearby
Taito🇯🇵 Japan · score 57.6Kamogawa, Chiba🇯🇵 Japan · score 57.2Hanakago🇯🇵 Japan · score 57.6Katagai🇯🇵 Japan · score 58.4
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