Usami Surf Break

Lat Long: 35.00° N 139.08° E

Usami Surf Forecast and Surf Report

Issued: 2 pm 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Usami sea temperature is
27.9° C
1.0° 

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


Usami surf forecast from 3 Aug 2026:

  • Best quality surf: Tuesday 4 Aug, 3PM (local time) - 10ft (3.0m), 16s period, SE swell with offshore winds.
  • Most powerful swell: Tuesday 4 Aug, 9PM (local time) - 10ft (3.0m), 16s period, SE swell with 4,959 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 3PM (local time) - 10ft (3.0m), 16s period with SE swell.

Best Forecast Surf Conditions for Usami this week:

The surf forecast for Usami over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 04) at 3PM. The primary swell is predicted to be 3.0m and 16s period with a secondary swell of 0.3m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Usami in the next 16 days are 3.0m 16s and forecast to arrive on Tuesday (Aug 04) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 16s period and expected on Wednesday (Aug 05) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Tue 4th Aug)10ft (3.0m) 16s
Best Surf 3PM (Tue 4th Aug)10ft (3.0m) 16s
Most Powerful 9PM (Tue 4th Aug)10ft (3.0m) 16s

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


The Lowdown

Alright, let me tell you about the surf outlook for Usami. This is a reef break that's pretty exposed to the east, but it’s a tricky one because it rarely breaks. We’ve got a window of opportunity here, but it’s not for the faint of heart.

The water is sitting at a warm 82°, about 2° above average for this time of year, so it’s a touch toastier than usual.

The first bit of action is on Monday, the 3rd of August. We’ve got a solid 6ft swell rolling in from the southeast with a very long 16-second period. That’s a lot of energy in the water (2068), and it’s coming from the east, which is a good direction for this spot. However, the wind is a cross-offshore from the northeast at 16 mph, which is okay but not perfect. The report says it’s marginal, and I’d agree – it’s a bit of a gamble with the tide and that strong wind.

Now, the standout is Tuesday afternoon, the 4th of August. This is the one to circle. The swell is pumping at 10ft from the southeast, with a 16-second period. That’s a massive amount of energy (4259), but the key here is the wind. It’s a clean offshore breeze from the east-northeast at 16 mph. This is going to groom those waves into some proper barrels. At 10ft, this is strictly for experts. If you’re not dialed in, this will spit you out. It’s a rare break that rarely breaks, so when it fires like this, it’s a special thing.

After that, things get messy. There’s a big gap from Wednesday the 5th through to Friday the 7th where the surf is either flat or poor. We get a little bump on Thursday afternoon with a 5ft swell from the east-southeast and offshore wind, but it’s not enough to get excited about.

Next up, we have a decent window on Saturday the 8th. The morning starts with a 7ft swell from the east-southeast, building to 7ft in the afternoon. The wind is offshore and light, from the east-southeast at 9 mph. The combined energy is moderate at 969 and 1115. This is good for advanced surfers, but it’s not the quality of Tuesday.

The second week is a bit of a letdown. From Sunday the 9th onward, the swell drops off significantly. There’s a small window of hope on Saturday the 15th of August. The afternoon brings a 7ft swell from the east-southeast with a good 11-second period, and the wind is offshore at 12 mph. The energy is moderate (890), and it’s a promising late-season pulse, but it’s a long way out.

Overall, the best bet is without a doubt Tuesday afternoon, the 4th of August. It’s a rare, heavy, and powerful swell with perfect wind. For the rest of the period, it’s a waiting game with a few smaller, more ordinary days.

Rusty

Short Range Forecast

Light rain (total 3mm), mostly falling on Wed night. Warm (max 29°C on Thu morning, min 22°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 17mm), heaviest on Fri night. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Wind will be generally light.

Mon
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
2
4
0
0
0
0
0
2
0
0
0
2
2
3
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SE
16
2.2
SE
17
2.5
SE
17
3
SE
16
3.5
SE
16
3.5
SE
16
3.5
SSE
16
1.4
E
10
1.1
E
10
1.4
ESE
10
0.9
ESE
10
1.4
SE
9
1.4
SE
9
2
ESE
9
2
ESE
9
2.1
ESE
9
1.5
SE
9
1.3
ESE
13
0.9
ESE
12
1.2
ESE
13
Wave Graph
Metric surfscale
Energy kJ
1672
2794
3723
4228
0
0
0
392
255
402
151
353
294
604
591
691
365
497
276
539
Wind (km/h)
25
NE
30
NE
25
NE
25
ENE
25
NE
25
NE
25
NE
20
NE
20
NE
20
ESE
20
NE
20
NE
20
NE
10
E
15
E
15
ESE
10
ENE
25
ENE
15
ESE
30
NE
Wind State
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-off
cross-off
cross-off
High Tide
8:01PM1.47m
8:16AM1.31m
8:25PM1.45m
9:15AM1.20m
8:51PM1.43m
10:41AM1.11m
9:22PM1.40m
1:34PM1.10m
10:02PM1.36m
4:15PM1.22m
11:11PM1.32m
4:28PM1.32m
00:54AM1.32m
Low Tide
2:17AM0.56m
2:08PM0.63m
3:04AM0.53m
2:35PM0.79m
4:01AM0.52m
3:01PM0.95m
5:15AM0.50m
3:16PM1.09m
6:44AM0.44m
5:53PM1.21m
8:02AM0.36m
8:44PM1.20m
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
rain showers
rain showers
clear
rain showers
rain showers
clear
rain showers
rain showers
clear
part cloud
light rain
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:54
4:54
4:56
4:56
4:56
4:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:44
6:43
6:42
6:40
6:39
6:38
 mm
2
1
4
1
7
4
1
Temp °C
25
23
26
26
24
26
28
26
29
28
25
27
28
26
28
28
26
27
27
25
Feels °C
25
21
23
24
23
25
28
28
30
29
27
28
29
29
30
30
30
28
29
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Usami Surf forecast

The above surf forecast table for Usami provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Usami can be found by selecting the local surf guide option on the grey menu. Our Usami surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Usami) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Usami may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Usami is 4 km (2 miles) from Ito. If you plan a holiday in Shizuoka, look for hotels and other accommodation in Ito. Ito has rooms for a wide range of budgets as well as car hire and transport links.

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