Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 2 pm 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
27.5°C
0.5° 

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 25 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 12AM (local time) - 4.5ft (1.4m), 12s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 26 Aug, 12AM (local time) - 4.5ft (1.4m), 12s period, S swell with 553 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 12AM (local time) - 4.5ft (1.4m), 12s period with S 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 26) at 12AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.6m and 10s. Another secondary swell of 0.7m 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 1.4m 12s and forecast to arrive on Wednesday (Aug 26) at 12AM. 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 26) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Wed 26th Aug)4.5ft (1.4m) 12s
Best Surf12AM (Wed 26th Aug)4.5ft (1.4m) 12s
Most Powerful12AM (Wed 26th Aug)4.5ft (1.4m) 12s

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


The Lowdown

Alright folks, Rusty here. Let’s talk about what’s up with the Sakawa River over the next couple of weeks. Honestly, the start of this forecast period is a bit of a slow burn. We’ve got waves on offer, but the quality is pretty ordinary for the first week or so, with a lot of "marginal" or "poor" labels on the tables. There’s a notable gap with no real recommendations for a solid stretch from late August right into early September.

The first real hint of something interesting doesn’t hit until Tuesday, 1st of September, when a sizeable bump in energy arrives. The combined energy of all swells directed here jumps to 532, which is moderate energy, and the swell comes in at 3 ft from the S with a very long period of 16 seconds. That’s proper groundswell. At Sakawa River, a long-period S swell like that will wrap in nicely, but that period is so long it might want to straighten out a bit. It’s a river break, so it should handle that better than a beachie. Wind is from the NE at 6 mph, making it a light cross-shore, which means those ripples will be small. It’s not clean perfection, but it’s the most promising we’ve seen.

The real standout, though, looks to be Wednesday, 9th of September. We’re seeing the biggest swell of the entire forecast, with a 6 ft swell from the S, period of 13 seconds, and a huge combined energy of 1473 – that’s strong wave energy. The wind is NNE at 12 mph, giving us a clean cross-offshore breeze. That’s a massive positive, meaning the river mouth should have some clean, peeling lines. This is definitely the best session on offer. Keep in mind it’s over a week away, so the exact positioning might change, but the ingredients are there for a proper day. The water temperature is running at 82°F, which is about normal for this time of year.

Before that, you’ve got some smaller windows. Wednesday morning, 3rd of September, sees 4 ft from the S, but it’s a cross-onshore wind, so not as clean. And by the weekend of the 6th and 7th, we get another rise in energy with 3 ft to 4 ft swells and cross-offshore winds on the 7th, but those are still carrying a "marginal" tag. The 6 ft on the 9th is the pick of the fortnight. Keep an eye on that one.

Stay salty,
Rusty.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Thu morning. Warm (max 31°C on Tue afternoon, min 24°C on Thu afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 13mm), heaviest on Sat morning. Warm (max 28°C on Fri afternoon, min 22°C on Sun morning). Wind will be generally light.

Tue
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
3
1
1
1
1
1
0
1
0
0
0
0
0
0
0
0
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)
1.2
SSE
12
1.4
S
12
1
S
11
0.8
SSW
11
0.7
SSE
8
0.5
S
11
0.6
S
10
0.7
S
10
0.6
S
9
0.9
SSW
8
0.6
S
7
0.4
SE
11
0.4
SE
11
0.4
SE
11
0.4
SE
10
0.3
SE
10
0.3
SE
10
0.6
SSW
9
0.6
S
12
0.8
S
11
Wave Graph
Metric surfscale
Energy kJ
418
553
256
164
64
58
78
87
56
108
35
30
31
29
26
18
16
59
95
149
Wind (km/h)
20
SW
10
W
5
SSW
20
SW
10
WSW
5
NNE
5
SW
10
SW
5
WSW
10
SW
10
N
10
NNE
10
NE
10
NNE
5
NNE
5
NNE
5
NNE
5
E
10
SSW
5
NE
Wind State
cross
cross-off
cross-on
cross-off
cross-off
cross-off
glassy
cross
glassy
cross
cross-off
cross-off
cross
cross-off
glassy
glassy
glassy
glassy
cross-on
glassy
High Tide
4:35PM1.33m
2:52AM1.35m
4:51PM1.38m
3:36AM1.42m
5:08PM1.43m
4:16AM1.47m
5:27PM1.46m
4:55AM1.50m
5:45PM1.49m
5:33AM1.50m
6:05PM1.51m
6:13AM1.47m
6:25PM1.51m
Low Tide
9:43PM0.95m
9:55AM0.23m
10:11PM0.85m
10:25AM0.20m
10:39PM0.74m
10:54AM0.20m
11:08PM0.63m
11:22AM0.24m
11:38PM0.52m
11:50AM0.32m
00:10AM0.43m
12:17PM0.43m
00:44AM0.36m
clear
rain showers
clear
clear
rain showers
mod rain
mod rain
light rain
part cloud
part cloud
thunderstorm
mod rain
light rain
cloud
light rain
cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:11
5:11
5:11
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:21
6:19
6:17
6:16
6:15
6:14
6:13
 mm
1
1
7
6
1
3
6
2
2
Temp °C
31
27
30
31
28
26
24
25
28
28
27
24
23
23
23
24
24
27
27
26
Feels °C
34
30
34
33
32
31
28
30
31
31
31
27
26
26
26
28
28
30
30
31
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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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