Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 8 pm 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
27.1°C
0.9° 

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


Sakawa River surf forecast from 13 Sep 2026:

  • Best quality surf: Saturday 19 Sep, 6PM (local time) - 8ft (2.5m), 12s period, SE swell with cross-offshore winds.
  • Most powerful swell: Saturday 19 Sep, 6AM (local time) - 8ft (2.5m), 14s period, SE swell with 2,775 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 15 Sep, 3AM (local time) - 2.5ft (0.8m), 9s period with SE swell.

Best Forecast Surf Conditions for Sakawa River this week:

The surf forecast for Sakawa River over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 3AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.2m and 13s. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Sakawa River in the next 16 days are 2.5m 14s and forecast to arrive on Saturday (Sep 19) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Friday (Sep 18) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 15th Sep)2.5ft (0.8m) 9s
Best Surf 6PM (Sat 19th Sep)8ft (2.5m) 12s
Most Powerful 6AM (Sat 19th Sep)8ft (2.5m) 14s

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


The Lowdown

Alright, let’s get into it.

The next couple of weeks are a real mixed bag. We’ve got a slow, bumpy start, but there's a proper pulse of energy building for the tail end of the month that looks like the best bet. You’re gonna need to be patient, but there’s some solid potential on the horizon.

Right off the bat, we’re looking at a bit of a flat, messy stretch. The Sakawa River (Japan) has tiny, weak surf in town, but honestly, it’s not worth your time. The swell’s small, wind’s choppy, and there’s no push. We’re talking about a few days of nothing happening – from Monday through Wednesday, the swell is under 1m, with a weak combined energy (around 60-70). It’s just not happening.

Thursday the 18th shows a hint of life, but the period is all over the place – 18 seconds in the morning, but only 4 seconds in the afternoon. It’s still pretty weak (energy around 140) and the wave comment says it's poor. Not worth suiting up.

Then things start to properly wake up. Friday the 19th is where the first real swell hits. We’re seeing 2.5m of SE swell, and the combined energy jumps up to 2467 – that’s a strong pulse. The problem is the wind and the period. It’s a bit raw, and at that size, Sakawa River is going to be a handful. Too big for beginners, for sure. This is more of a look-and-see day.

But here’s the standout, and I mean the real standout – Sunday the 20th. The swell drops slightly to 1.7m, but the period is a solid 10-13 seconds, and the energy is still pumping at 1445. The wind goes glassy in the afternoon. This is looking like the best quality surf of the whole run. Clean, glassy, with real push. This is for experienced surfers – at 1.7m, it’s a proper wave, not for the faint of heart. If you can get out there, this is the day.

The next few days after that hold some size, but the wind and conditions get a bit messy. Monday the 21st has 2m but the wind is cross-onshore, pretty bumpy. Tuesday the 22nd morning is excellent though – glassy, clean, 1.8m of SSW swell, with 13-second period and energy at 1320. That's another great window for the more experienced crew.

After that, the swell fades back down. Wednesday the 23rd has a small clean window in the morning – 1.4m of S swell, glassy, but the energy drops (604). It’s surfable, but nothing special.

Then it goes quiet again. Thursday through Saturday, we’re back to small, weak swell, under 1m, with mostly cross-shore winds. It’s a bit of a dead stretch, a few days of nothing.

But hold on – Monday the 28th and Tuesday the 29th of September are worth watching. The swell rebuilds to around 1-1.3m of SE swell, with a 10-11 second period and energy in the mid-300s. It’s clean in the mornings. This is a promising end to the window, but we’re looking further out, so I’d treat it as a promising possibility, not a guarantee.

So, to sum it up: The best days on offer are Sunday the 20th and Tuesday the 22nd morning. That’s when you want to be in the water. The rest is a waiting game. Keep an eye on that long-range stuff at the end – it might just come together.

Stay salty.

Rusty

Short Range Forecast

Heavy rain (total 24mm), heaviest during Tue morning. Warm (max 29°C on Mon morning, min 22°C on Wed morning). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 20mm), heaviest during Sat afternoon. Warm (max 25°C on Sat morning, min 20°C on Thu night). Wind will be generally light.

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
1
0
1
0
0
0
0
0
0
0
2
3
3
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SE
8
0.6
SE
8
0.6
SE
10
0.8
SE
9
0.8
SE
9
0.8
SE
8
0.8
SE
8
0.7
SE
8
0.6
SE
8
0.6
SE
8
0.5
SE
8
0.4
SE
8
0.3
E
8
0.4
SE
18
1.4
SE
16
2.3
SE
15
2.5
SE
13
2.5
SE
12
2.4
SE
12
Wave Graph
Metric surfscale
Energy kJ
39
44
76
103
107
93
73
55
54
54
30
21
12
121
1042
2278
2467
1789
1557
Wind (km/h)
10
WSW
15
SW
20
SW
10
SW
5
WSW
5
SW
5
NNE
10
NE
10
NE
10
N
15
NNE
20
NNE
20
NNE
20
N
25
NNE
20
NNE
20
NNE
15
NE
10
N
Wind State
cross-off
cross
cross
cross
cross-off
cross
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
High Tide
6:20AM1.46m
6:01PM1.51m
6:59AM1.37m
6:20PM1.49m
7:40AM1.27m
6:39PM1.46m
8:27AM1.16m
6:58PM1.41m
9:36AM1.06m
7:17PM1.35m
7:36PM1.27m
Low Tide
00:01AM0.29m
12:07PM0.58m
00:34AM0.27m
12:29PM0.71m
1:07AM0.28m
12:48PM0.81m
1:43AM0.34m
1:01PM0.91m
2:27AM0.42m
1:02PM0.99m
3:27AM0.51m
clear
clear
cloud
thunderstorm
mod rain
rain showers
light rain
light rain
light rain
light rain
cloud
cloud
light rain
part cloud
part cloud
part cloud
part cloud
heavy rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
5:26
5:26
5:26
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:51
5:50
5:49
5:46
5:45
 mm
2
10
5
3
1
3
2
1
17
16
Temp °C
24
29
28
25
24
24
24
23
22
22
22
22
21
22
24
22
25
23
22
Feels °C
28
30
29
27
27
27
27
25
24
23
22
21
20
21
23
21
25
25
22
  • Map Icons:
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  • 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 Sakawa River Surf forecast

The above surf forecast table for Sakawa River provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sakawa River can be found by selecting the local surf guide option on the grey menu. Our Sakawa River 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 (Sakawa River) 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 Sakawa River 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.

Sakawa River is 2 km (1 miles) from Odawara. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Odawara. Odawara has rooms for a wide range of budgets as well as car hire and transport links.

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