Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 8 am 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
27.8°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 9 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 6PM (local time) - 8ft (2.5m), 9s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 8ft (2.5m), 9s period, SSW swell with 955 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 6PM (local time) - 8ft (2.5m), 9s period with SSW 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 (Sep 09) at 6PM. The primary swell is predicted to be 2.5m and 9s period with a secondary swell of 2.0m and 9s. Another secondary swell of 0.1m and 16s 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 9s and forecast to arrive on Wednesday (Sep 09) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 10) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Wed 9th Sep)8ft (2.5m) 9s
Best Surf 6PM (Wed 9th Sep)8ft (2.5m) 9s
Most Powerful 6PM (Wed 9th Sep)8ft (2.5m) 9s

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


The Lowdown

Alright, let’s get into it.

Right off the bat, the Sakawa River isn’t really offering much for the first week or so. It’s a pretty bleak run from Wednesday the 9th through to the Thursday the 17th. There are a few days where the swell is just non-existent, down around 1ft to 2ft, and we’ve got weak energy readings in the 50s and 60s. That’s not surf, that’s just a lake. The wind is mostly cross or light cross-off, but with no swell to push around, it doesn’t matter. It’s a real flat spell. The water is sitting at 82°, which is a touch warmer than normal for this time of year, that’s a small comfort if you’re just going for a paddle.

We finally see a pulse of energy arrive late on Friday the 18th. The morning is still messy, but by the afternoon, the wind swings to a cross-off from the NNE and the swell jumps up to 3ft with a longer period of 15 seconds. That’s got some life to it. The energy number jumps up to 415, which is a start. It’s not big, but it’s clean.

Then Saturday the 19th is where things get interesting. The swell builds to 5ft, coming from the SSE with a 14-second period, and the energy is up around 1357 to 1635. That’s moderate to strong. The morning is the pick with a clean cross-off breeze. This is a river break, and that long period groundswell with that direction will be linking up nicely. This is looking like the first real standout.

Sunday the 20th is the big one though. We’ve got a proper groundswell pushing through. The morning shows 7ft from the south with a 16-second period, and the energy is a strong 2480. The wind is a light cross-off from the NNE. It’s clean, powerful, and organized. The afternoon gets even better with a glassy, 7ft southerly swell and a 15-second period. The energy is still strong at 1788. This is the best day on offer, no doubt.

Monday the 21st keeps the momentum, with the morning seeing 7ft from the south, a 16-second period, and energy at 2596. The cross-off wind is light. This is board-shortening territory. The afternoon gets a bit messier with a cross-shore wind and the swell swinging to the SSW, but the morning is the window.

Tuesday the 22nd is still solid, with 7ft from the SSW in the morning, but the afternoon is where I’d be. The wind goes glassy, and we still have a 6ft swell with 14 seconds of period. That’s excellent.

Now, for the caveat. This river break is handling a lot of size, but when it gets over 8ft, it can get tricky, and on the 23rd we’re seeing a solid 13ft southerly swell with a short 9-second period and a fresh 30 km/h cross-shore wind. That’s blown out and maxed out. That’s not for us; that looks more like a kiteboarding zone than a surf break. A messy, oversized, wind-blown river mouth isn't a fun paddle.

After that, on Thursday the 24th, it drops right back down again. The morning is glassy with a clean 3ft south swell, but the energy is dropping fast, and it just fades out from there.

So, to wrap it up. Look to Saturday the 19th for a taste, but the real standout is Sunday the 20th. Big, clean, long-period south groundswell with next to no wind. Monday morning is a close second. Get on it.

Rusty.

Short Range Forecast

Heavy rain (total 45mm), heaviest during Wed night. Warm (max 28°C on Wed afternoon, min 20°C on Thu morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 28°C on Mon morning, min 21°C on Sat morning). Wind will be generally light.

Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
1
0
1
1
0
0
0
0
0
1
0
0
1
0
0
1
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SSW
8
2.5
SSW
9
1.5
S
9
1.1
S
8
0.9
S
8
0.7
S
8
0.6
S
8
0.6
S
8
0.4
SE
10
0.4
SE
10
0.3
ESE
14
0.5
ESE
13
0.5
SE
9
0.6
SE
9
0.7
SE
9
0.8
SE
9
0.9
SE
9
0.9
SE
8
0.8
SE
9
0.8
SE
9
0.8
SE
8
Wave Graph
Metric surfscale
Energy kJ
936
1081
349
167
107
61
41
40
28
24
37
99
41
62
77
106
118
120
93
104
75
Wind (km/h)
15
SW
15
SW
20
NNE
15
NE
15
NNE
10
NNE
10
NE
10
NE
10
NNE
10
NNE
5
NE
10
NNE
10
NE
5
ENE
5
NNW
10
SSW
15
SSW
10
WSW
5
W
15
SSW
10
WSW
Wind State
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross
cross-off
cross-off
cross
cross-off
cross-off
cross-on
glassy
cross-on
cross
cross-off
cross-off
cross
cross-off
High Tide
4:25PM1.43m
3:26AM1.47m
4:45PM1.46m
4:15AM1.53m
5:05PM1.48m
4:59AM1.54m
5:24PM1.50m
5:40AM1.52m
5:42PM1.51m
6:20AM1.46m
6:01PM1.51m
6:59AM1.37m
6:20PM1.49m
Low Tide
9:30AM0.17m
9:53PM0.79m
10:09AM0.18m
10:25PM0.63m
10:43AM0.24m
10:57PM0.49m
11:14AM0.34m
11:29PM0.37m
11:42AM0.46m
00:01AM0.29m
12:07PM0.58m
00:34AM0.27m
12:29PM0.71m
1:07AM0.28m
thunderstorm
thunderstorm
heavy rain
cloud
light rain
heavy rain
light rain
light rain
cloud
cloud
light rain
light rain
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
5:22
5:22
5:22
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
5:59
5:57
5:55
5:53
5:52
5:51
 mm
2
4
23
1
13
1
1
1
1
2
Temp °C
27
28
22
21
20
20
21
21
20
22
23
22
25
26
25
28
27
26
26
26
25
Feels °C
30
32
22
21
20
20
23
22
21
23
25
24
28
29
29
29
29
30
28
28
28
  • 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 
submit an eyeball surf report

Quick surf report for Sakawa River:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sakawa River surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest