Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 8 am 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
27.2° C
0.6° 

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 30 Jul 2026:

  • Best quality surf: Tuesday 4 Aug, 6PM (local time) - 11ft (3.5m), 16s period, SE swell with cross-onshore winds.
  • Most powerful swell: Thursday 6 Aug, 6AM (local time) - 13ft (4.0m), 17s period, SSE swell with 10,234 kJ wave energy.
  • Next surfable swell (1★+): Thursday 30 Jul, 6PM (local time) - 3.5ft (1.1m), 6s period with SW 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 Thursday (Jul 30) at 6PM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.5m and 7s. Another secondary swell of 0.3m and 10s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Sakawa River in the next 16 days are 4.0m 17s and forecast to arrive on Thursday (Aug 06) 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 0.8m 4s period and expected on Wednesday (Aug 05) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 30th Jul)3.5ft (1.1m) 6s
Best Surf 6PM (Tue 4th Aug)11ft (3.5m) 16s
Most Powerful 6AM (Thu 6th Aug)13ft (4.0m) 17s

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


The Lowdown

Alright, it's Rusty. Let's talk about what's cookin' at the Sakawa River for the next couple of weeks.

Right now, the first few days are a total washout. From Thursday, 30 July through Saturday, 1 August, it's pretty much flat. The combined energy is tiny, like 20 to 40 – that's barely a breath of wind on the water. Mornings are glassy, which is cruel, but the swell is just too weak and short to do anything with. Don't bother.

Then things flip the script. On the morning of Sunday, 2 August, the Sakawa River wakes up with a 1.0m swell from the ESE, a 16-second period – that's proper groundswell – and the energy jumps to 538. Glassy winds that morning mean it'll be peaky and clean. That SE direction is exactly what this spot likes. This is the standout: Sunday, 2 August morning. Not a huge wave, but for a river break, that long-period, clean, glassy 1.0m swell is money.

After that, the swell goes nuts. Monday, 3 August brings 1.9m from the ESE with cross-shore wind, energy near 2000. By Tuesday, 4 August it's 3.0m, and Wednesday and Thursday (5 and 6 August) we're lookin' at 3.5m to 4.0m with energy over 8,000. That's way too big for this river. The notes say wind and tide are favorable, but the swell is predicted to be too big for this break. It'll be a dangerous, washing machine mess for anyone but absolute experts, and the cross-shore winds will chop it up.

The swell drops a bit but stays big and messy into Friday and Saturday, 7 and 8 August. 2.5m to 3.0m, onshore winds, rough conditions. Not a good look.

The next real chance is Sunday morning, 9 August. The swell has dropped to a manageable 1.1m from the ESE, 14-second period, and – you guessed it – glassy winds. The energy is 695, and the forecaster says "expect very good surf conditions." That's another standout session. Good, long waves at the river mouth.

After that, Monday and Tuesday (10 and 11 August) drop right off. Small, weak, poor. Another little bump comes in on Wednesday, 12 August morning – 1.4m from the ESE with 13-second period, but the wind is cross-shore, so it's just okay. By Wednesday afternoon it gets bigger to 2.2m but with cross-onshore wind, so it's choppy.

The rest of the second week, right through Friday, 14 August, keeps some size – 1.3m to 1.7m – but the wind stays cross-on or onshore, and the period drops to 10 seconds. The energy is moderate, but the quality isn't there. It's messy.

So, bottom line: Your best bets are the glassy, clean mornings on Sunday, 2 August and Sunday, 9 August. The mid-week stuff is big and ugly. Watch those Sunday windows.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Thu afternoon. Warm (max 31°C on Thu morning, min 27°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Sun afternoon. Warm (max 31°C on Sun afternoon, min 25°C on Sun night). Wind will be generally light.

Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
AM
PM
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
0
0
0
0
2
2
1
2
2
2
3
4
3
!
!
!
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
10
0.3
SE
10
0.6
S
7
0.5
S
6
0.5
S
6
0.4
S
6
0.4
SSW
7
0.2
ESE
15
0.7
ESE
17
1
ESE
16
1.1
SE
15
1.5
ESE
16
1.9
ESE
17
2.2
SE
17
2.4
SE
17
3
SE
16
3
SE
16
3.5
SE
16
3.5
SSE
16
4
SSE
17
4
SSE
17
Wave Graph
Metric surfscale
Energy kJ
23
17
34
21
21
13
15
21
261
525
496
1170
1970
2746
3298
4107
5105
5351
6569
8387
9569
Wind (km/h)
5
E
10
S
10
NNW
5
SSE
10
S
5
NE
5
SE
10
S
0
ENE
5
ESE
10
SSE
15
NE
15
NE
15
ENE
15
NE
15
ENE
10
E
10
ENE
15
ENE
10
SE
10
NE
Wind State
glassy
cross-on
cross-off
glassy
cross-on
glassy
glassy
cross-on
glassy
glassy
on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
on
cross
High Tide
6:13PM1.42m
5:00AM1.48m
6:35PM1.44m
5:38AM1.47m
6:56PM1.46m
6:18AM1.43m
7:18PM1.46m
7:00AM1.37m
7:41PM1.46m
7:48AM1.28m
8:05PM1.45m
8:47AM1.18m
8:33PM1.43m
Low Tide
11:21AM0.13m
11:31PM0.83m
11:50AM0.15m
00:04AM0.75m
12:19PM0.20m
00:38AM0.68m
12:47PM0.29m
1:15AM0.61m
1:15PM0.41m
1:55AM0.55m
1:44PM0.55m
2:41AM0.50m
2:14PM0.72m
part cloud
rain showers
thunderstorm
part cloud
part cloud
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:50
4:50
4:50
4:52
4:52
4:52
4:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:47
6:46
6:45
6:45
6:44
6:43
 mm
1
2
1
1
1
3
Temp °C
31
31
29
31
31
28
30
30
29
30
31
27
27
29
26
29
30
26
30
30
27
Feels °C
34
34
33
34
34
33
34
34
35
35
35
31
29
31
27
30
32
30
32
32
32
  • 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 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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