Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 8 am 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
27.9°C
1.0° 

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 29 Aug 2026:

  • Best quality surf: Monday 31 Aug, 9PM (local time) - 1.5ft (0.4m), 13s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Thursday 3 Sep, 9PM (local time) - 2.5ft (0.8m), 11s period, S swell with 149 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 9PM (local time) - 1.5ft (0.4m), 13s period with ESE 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 Monday (Aug 31) at 9PM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.3m and 9s. Another secondary swell of 0.2m and 6s 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 0.8m 11s and forecast to arrive on Thursday (Sep 03) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Saturday (Sep 05) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 31st Aug)1.5ft (0.4m) 13s
Best Surf 9PM (Mon 31st Aug)1.5ft (0.4m) 13s
Most Powerful 9PM (Thu 3rd Sep)2.5ft (0.8m) 11s

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


The Lowdown

Alright, Rusty here, breaking down the Sakawa River stretch for the next couple of weeks. First thing: the water is sitting at about 82°, which is a degree warmer than usual for this time of year – feels like a hot tub.

The first few days, from Saturday the 29th through Monday the 31st of August, are a total dud. Tiny swell, messy wind, and just poor conditions. Don’t bother.

Tuesday the 1st of September shows a slight pulse. The morning goes glassy with a 2ft swell from the east, period at 12 seconds – that’s proper groundswell. The combined energy is moderate at 149. It’s clean, but the waves are still very ordinary. Ankle-high stuff for beginners.

A few more average days follow. Wednesday and Thursday offer small waves with cross-onshore winds. Thursday the 3rd has a glassy morning with 2ft from the south, but the period is short at 9 seconds, so not much push.

The first real standout pops up on Sunday the 7th of September. The afternoon brings a 5ft swell from the east-southeast, 10-second period, and strong combined energy of 501. The wind is cross-off from the north-northeast, keeping it clean. This is the first “good surf conditions” note. Waist-to-chest high, clean, and with some power.

The action continues into Monday the 8th with similar size, but the wind shifts more cross-shore, so Sunday is the better session.

Then we hit the best wave of the whole outlook on Wednesday the 10th of September. The morning is glassy with a 5ft swell from the east-southeast, period at 13 seconds, and combined energy pumping at 593. That’s a strong groundswell with dead calm wind. This is the one. A bit overhead for beginners, but for intermediates and up, it’s firing. The long period (13 seconds) means good shape and power, though at a river mouth it can run a bit straight along the sandbars.

After that, the swell drops off. The rest of the second week – Thursday the 11th through Sunday the 13th – is back to small, weak, or onshore conditions. There’s a glassy Saturday morning with 3ft from the southeast, but it’s ordinary.

The final standout is that same Wednesday the 10th morning. Crowds at Sakawa River are listed as “sometimes,” so on a good swell like that, expect a few heads out, but not a zoo.

Bottom line: The first week is a wash. Circle Sunday the 7th of September afternoon and especially Wednesday the 10th of September morning. That glassy groundswell Wednesday is the real deal.

Rusty, out.

Short Range Forecast

Light rain (total 3mm), mostly falling on Sat morning. Warm (max 27°C on Mon morning, min 22°C on Sat afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Wed night. Warm (max 29°C on Wed morning, min 25°C on Tue night). Wind will be generally light.

Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
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
1
1
0
1
0
0
1
1
0
1
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)
0.4
SE
11
0.8
SW
6
0.4
SE
11
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.3
SE
10
0.3
ESE
14
0.4
ESE
13
0.6
E
12
0.6
ESE
12
0.6
E
11
0.5
E
10
0.5
ESE
10
0.7
SE
7
0.6
S
9
0.8
SE
7
0.8
S
10
0.7
S
10
0.7
S
10
0.5
S
10
Wave Graph
Metric surfscale
Energy kJ
30
43
29
26
27
26
19
36
56
106
111
88
53
58
47
56
55
135
92
92
51
Wind (km/h)
5
N
15
NNE
10
NNE
5
NE
5
S
5
NNE
10
ENE
10
NE
5
NNE
5
SE
10
S
5
WSW
5
ESE
15
S
10
WSW
5
SW
15
SSW
5
W
15
NE
15
NE
15
NE
Wind State
glassy
cross-off
cross-off
cross
cross-on
glassy
cross
cross
cross-off
glassy
cross-on
glassy
cross-on
cross-on
cross-off
glassy
cross-on
cross-off
cross
cross
cross
High Tide
5:45PM1.49m
5:33AM1.50m
6:05PM1.51m
6:13AM1.47m
6:25PM1.51m
6:56AM1.41m
6:47PM1.51m
7:44AM1.31m
7:09PM1.49m
8:44AM1.20m
7:34PM1.45m
10:22AM1.10m
8:03PM1.40m
Low Tide
11:22AM0.24m
11:38PM0.52m
11:50AM0.32m
00:10AM0.43m
12:17PM0.43m
00:44AM0.36m
12:44PM0.57m
1:22AM0.32m
1:11PM0.72m
2:06AM0.32m
1:35PM0.87m
3:03AM0.35m
1:53PM1.01m
light rain
light rain
cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
rain showers
light rain
cloud
cloud
cloud
light rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:13
5:13
5:15
5:15
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:14
6:13
6:10
6:09
6:07
6:07
 mm
2
1
1
2
2
28
Temp °C
24
24
22
24
26
24
27
27
25
27
28
26
29
29
26
29
28
27
26
24
21
Feels °C
28
26
23
27
29
28
30
30
28
32
31
31
32
32
30
32
30
31
28
25
22
  • 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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