Usami Surf Break

Lat Long: 35.00° N 139.08° E

Usami WaveFinder

Issued: 2 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Usami sea temperature is
27.6°C
0.4° 

Usami surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Usami surf forecast from 25 Aug 2026:

  • Most powerful swell: Saturday 29 Aug, 12AM (local time) - 3.5ft (1.1m), 6s period, SW swell with 80 kJ wave energy.

Best Forecast Surf Conditions for Usami this week:

The most powerful waves expected at Usami in the next 16 days are 1.1m 6s and forecast to arrive on Saturday (Aug 29) at 12AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 13s period and expected on Tuesday (Aug 25) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12AM (Sat 29th Aug)3.5ft (1.1m) 6s

Table - best surf conditions forecast for Usami over the next 16 days.


  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
Nearest locationNearest