Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 2 am 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: Tuesday 25 Aug, 9PM (local time) - 5ft (1.5m), 12s period, S swell with cross-offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 5ft (1.5m), 13s period, SSE swell with 670 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 9PM (local time) - 5ft (1.5m), 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 Tuesday (Aug 25) at 9PM. The primary swell is predicted to be 1.5m and 12s period with a secondary swell of 0.3m and 13s. 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 1.5m 13s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Wednesday (Aug 26) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Tue 25th Aug)5ft (1.5m) 12s
Best Surf 9PM (Tue 25th Aug)5ft (1.5m) 12s
Most Powerful12PM (Tue 25th Aug)5ft (1.5m) 13s

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


The Lowdown

Alright, let’s break it down. The first few days are pretty ordinary, so don’t get too excited just yet. We’ve got a slow start with small waves and tricky winds, but there’s some promise later on if you’ve got patience.

For starters, Tuesday the 25th at Sakawa River is a write-off. Morning sees a 6ft south swell but it’s cross-shore, a bit messy, and the tide might be against you. The combined energy is moderate (1161) but it’s just not coming together. By afternoon it drops off.

Wednesday the 26th is flat and uninspiring – 3ft south early, then 3ft in the afternoon. The afternoon does get a cross-offshore breeze so it’ll be clean, but barely any push. Thursday and Friday are worse – tiny 1-2ft waves and mostly onshore or cross. Friday morning actually has glassy conditions, but the swell’s barely a ripple.

We hit a real lull from Saturday the 29th through Monday the 31st. The swell drops to 1.0-2ft, combined energy down to a weak 32-69. It’s a proper flat spell – not much to even paddle around in. You’d be better off leaving the board at home for those days.

Now here’s where it gets interesting. Tuesday the 1st of September shows a pulse. Morning brings 3ft from the SSE with a long 13-second period and clean cross-offshore wind. The energy’s moderate at 267. It’s not huge, but the quality should be there – long period groundswell like that will line up nicely, especially with the optimum direction being SE, which matches. This is the first real standout. Give it a look if you’re keen.

Then Wednesday the 2nd gets chunky. The morning is a solid 8ft from the SSE, but it’s cross-onshore and borderline for size. The afternoon though – 8ft, glassy wind, and a combined energy of 1259. That’s serious grunt. This is for experienced surfers only – over 8ft is expert territory. If you’re not comfortable in solid waves, sit this one out. But if you are, the glassy conditions will make it special.

Thursday the 3rd goes absolutely mental – 31ft swell with a combined energy of 53657. That’s not surfable at Sakawa River. Too big, period too long (15 seconds), and it’ll close out completely. Only a fool would paddle out that day. Stick to watching from the bank.

After that, it drops right back. Friday the 4th and Saturday the 5th have 2-3ft but with poor wind or glassy but tiny. From the 6th to the 9th, it’s mostly 1-3ft with clean offshore wind from the north – cross-off conditions are consistent, but the swell’s too small to get excited about. Energy stays weak, under 113. It’s frustrating because the wind is good, but there’s just no swell.

So overall: the first week is forgettable. The standout is Tuesday the 1st of September for a clean, long-period swell in the morning, and if you’re an expert, the glassy 8ft on Wednesday afternoon the 2nd is the best of the whole window. After that, it fizzles out. Get in while it’s good, because the rest is a waiting game.

Rusty.

Short Range Forecast

Moderate rain (total 10mm), heaviest on Thu night. Warm (max 31°C on Tue afternoon, min 24°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 8mm), mostly falling on Fri night. Warm (max 28°C on Sat morning, min 24°C on Sat night). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
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
1
2
1
1
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
S
13
1.2
SSE
12
1.4
S
12
1
S
11
0.8
SSW
11
0.7
SSE
8
0.5
S
11
0.5
S
10
0.5
S
10
0.8
S
9
1
SSW
8
1.1
SW
6
0.4
SE
11
0.4
SE
11
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.3
SE
10
0.3
SE
10
0.6
E
6
0.3
SE
10
Wave Graph
Metric surfscale
Energy kJ
1018
418
553
256
164
62
58
54
45
99
131
80
30
31
28
26
27
16
15
22
17
Wind (km/h)
10
SSW
20
SW
10
W
5
SW
20
SW
10
WSW
10
SSW
15
WSW
10
S
5
SW
10
SSW
5
NW
10
ENE
10
SSW
10
NE
5
NE
5
SSE
10
ESE
10
NE
5
E
10
NE
Wind State
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross-off
cross-on
glassy
cross-on
glassy
cross
cross-on
cross
cross
cross-on
cross-on
cross
glassy
cross
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
9:21AM0.30m
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
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
mod rain
part cloud
part cloud
thunderstorm
rain showers
light rain
cloud
part cloud
part cloud
light rain
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
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
4
6
1
2
2
3
Temp °C
30
31
27
30
31
28
30
30
25
27
27
26
28
27
26
27
27
25
25
26
26
Feels °C
32
34
30
33
33
32
32
33
30
30
30
30
31
30
30
30
31
29
28
30
30
  • 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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