Shonan Surf Forecast
Free surf forecast for Shonan, Japan — 1 surf spot. Wave height, swell, wind, tide and live buoy conditions with a 16-day outlook, no subscription, updated daily on SwellByte.
Best surf spot in Shonan by day
Top-rated of 1 spot each day
SunSep 13Kugenuma★★★★★1.4ftMonSep 14Kugenuma★★★★★1.7ftTueSep 15Kugenuma★★★★★1.4ftWedSep 16Kugenuma★★★★★1.5ftThuSep 17Kugenuma★★★★★0.0ftFriSep 18Kugenuma★★★★★5.4ftbest 3pmSatSep 19Top pickKugenuma★★★★★6.2ftbest 9pmSunSep 20Kugenuma★★★★★6.5ftMonSep 21Kugenuma★★★★★5.7ftTueSep 22Kugenuma★★★★★10.2ftWedSep 23Kugenuma★★★★★16.3ftThuSep 24Kugenuma★★★★★3.0ftFriSep 25Kugenuma★★★★★3.1ftSatSep 26Kugenuma★★★★★2.1ftSunSep 27Kugenuma★★★★★4.2ftMonSep 28Kugenuma★★★★★5.4ft
Surf spots in Shonan
Best wind spot in Shonan
Where the wind is best for kitesurfing, wing foiling and windsurfing over the next few days — rated on cross-shore direction and strength in knots, not on waves.
Monthly conditions in Shonan
How often each surf size shows up by month, 2020–2024, measured near Kugenuma. Bars fill from the bottom by the share of days reaching each surf size; white at the top is smaller days. The percentage is the chance of a surfable day.
2–4ft4–6ft6–8ft8–12ft12ft+
Jan
9%
Feb
20%
Mar
25%
Apr
27%
May
23%
Jun
13%
Jul
13%
Aug
27%
Sep
24%
Oct
17%
Nov
27%
Dec
23%
Swell period
7s
9s
9s
10s
9s
8s
8s
10s
9s
11s
9s
8s
Water temp
62°F
60°F
61°F
63°F
66°F
71°F
77°F
82°F
80°F
75°F
71°F
65°F