Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 2 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
27.9° C
1.2° 

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 2 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 12AM (local time) - 11ft (3.5m), 16s period, SE swell with cross-offshore winds.
  • Most powerful swell: Thursday 6 Aug, 6PM (local time) - 13ft (4.0m), 16s period, S swell with 7,297 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 12AM (local time) - 11ft (3.5m), 16s 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 Wednesday (Aug 05) at 12AM. The primary swell is predicted to be 3.5m and 16s period. 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 4.0m 16s and forecast to arrive on Thursday (Aug 06) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Aug 05) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Wed 5th Aug)11ft (3.5m) 16s
Best Surf12AM (Wed 5th Aug)11ft (3.5m) 16s
Most Powerful 6PM (Thu 6th Aug)13ft (4.0m) 16s

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


The Lowdown

Alright, sit down and let’s talk about what’s coming. The only spot in the picture is the Sakawa River, and it’s a wild ride ahead.

The water is sitting at 82°, which is warmer than average for this time of year, so you’ll be comfy in a spring suit.

First surf shows up on Sunday afternoon, August 2nd. It’s a shaky start: a 4ft swell from the SE with a long 15-second period, and light onshore wind. The wave energy is moderate (517), but conditions are marginal. Not much to get fired up about.

Things start building Monday morning, August 3rd. We get a 5ft SE swell, period stretching to 16 seconds, and clean cross-offshore winds. The energy jumps to 1256 – solid. By Monday afternoon, it’s up to 6ft, still clean, with strong energy at 2082. Tuesday morning, August 4th, is the real standout: 8ft of SE swell, 16-second period, clean cross-off wind, and big energy at 3132. This is the best window for an intermediate surfer – it’s solid but still manageable.

Monday and Tuesday mornings are the picks for the first week. The long-period groundswell will give good shape, and the river mouth setup should handle it nicely. Crowds are possible, so get out early.

After Tuesday, it gets heavy. Tuesday afternoon, the swell hits 10ft and the wind goes cross-onshore and choppy – not worth it. Wednesday and Thursday mornings (5th and 6th) see a massive 12ft swell from the SSE, with energy readings over 6000 (very strong). The wind is favourable, but this is expert-only territory. At 12ft and a 16-second period, it’s going to be big, powerful, and only for the brave. The afternoons during this stretch are blown out.

Friday the 7th is still big at 12ft in the morning, with a gentle cross-shore breeze, but it’s still too big for most. The afternoon drops to 8ft but with onshore wind and rain – messy.

From Saturday the 8th onward, the swell starts to fade quickly. We get a 6ft SSW swell Saturday morning, but it’s cross-onshore and choppy. By Sunday the 9th, it’s down to 5ft and the wind is poor. The second week (from August 10th) is a real lull. Swell drops to around 4ft or less, with weak energy in the low hundreds to mid hundreds. Winds are often clean, but the waves are small and ordinary. There’s a brief moment on Thursday the 13th morning with glassy conditions and 3ft SSW swell, but it’s tiny and weak. After that, it’s a long stretch of flat, poor surf through to the 17th.

So, the standout is definitely Tuesday morning, August 4th: 8ft SE swell, 16-second period, clean cross-off wind, and strong energy. Monday the 3rd is also a good one. After that, it’s a big, powerful week for experts only, then a long, slow fade-out.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sun night. Warm (max 31°C on Sun afternoon, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 47mm), heaviest during Fri night. Warm (max 31°C on Thu morning, min 25°C on Wed night). Wind will be generally light.

Sun
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
3
3
3
0
!
!
!
!
!
0
!
!
3
3
2
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SE
15
1.3
ESE
15
1.6
SE
16
1.8
SE
16
2.2
SE
17
2.5
SE
16
3
SE
16
3.5
SE
16
3.5
SE
16
3.5
SSE
16
3.5
SSE
16
3.5
SSE
16
3.5
SSE
16
3.5
S
16
3.5
S
16
2.5
S
15
2.1
SSW
14
1.9
SSW
14
1.8
SSW
14
1.6
SSW
14
Wave Graph
Metric surfscale
Energy kJ
489
750
1239
1672
2794
3097
4467
6029
6365
6330
5882
6735
7172
6952
5631
2830
1704
1322
1173
947
Wind (km/h)
10
SSE
20
NE
20
NE
20
NE
20
NNE
20
NNE
25
ENE
20
NNE
20
NNE
20
NE
15
NNE
20
NE
20
ESE
15
NE
15
NE
15
E
10
NE
15
E
10
ESE
10
NE
Wind State
on
cross
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
cross-off
cross
cross-off
cross
cross-on
cross
cross
cross-on
cross
cross-on
on
cross
High Tide
7:18PM1.46m
7:00AM1.37m
7:41PM1.46m
7:48AM1.28m
8:05PM1.45m
8:47AM1.18m
8:33PM1.43m
10:12AM1.09m
9:05PM1.40m
12:46PM1.07m
9:50PM1.36m
3:24PM1.19m
11:07PM1.33m
Low Tide
1:15AM0.61m
1:15PM0.41m
1:55AM0.55m
1:44PM0.55m
2:41AM0.50m
2:14PM0.72m
3:38AM0.47m
2:46PM0.88m
4:53AM0.43m
3:24PM1.05m
6:23AM0.36m
5:48PM1.18m
thunderstorm
light rain
part cloud
part cloud
clear
clear
part cloud
cloud
part cloud
clear
rain showers
clear
rain showers
rain showers
rain showers
thunderstorm
rain showers
rain showers
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:52
4:52
4:54
4:54
4:56
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:44
6:43
6:43
6:42
6:39
 mm
2
2
1
2
9
4
8
16
7
4
Temp °C
31
26
27
27
25
28
28
24
28
30
26
31
30
26
26
28
26
28
29
26
Feels °C
35
28
27
27
25
27
27
24
28
30
27
32
31
29
28
31
30
31
32
29
  • 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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