Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 2 am 11 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 11 Aug 2026:

  • Best quality surf: Sunday 16 Aug, 3AM (local time) - 3ft (0.9m), 11s period, ESE swell with glassy winds.
  • Most powerful swell: Sunday 16 Aug, 6AM (local time) - 3.5ft (1.0m), 11s period, E swell with 242 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 6PM (local time) - 2ft (0.6m), 10s 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 Tuesday (Aug 11) at 6PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 11s. Another secondary swell of 0.6m 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 1.0m 11s and forecast to arrive on Sunday (Aug 16) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Sunday (Aug 16) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Tue 11th Aug)2ft (0.6m) 10s
Best Surf 3AM (Sun 16th Aug)3ft (0.9m) 11s
Most Powerful 6AM (Sun 16th Aug)3.5ft (1.0m) 11s

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


The Lowdown

G’day, Rusty here. Look, I’ll level with ya – the next couple of weeks are looking pretty flat and ordinary for the Sakawa River. We’ve got a long stretch of small, weak, messy surf ahead, so don’t get your hopes up for anything juicy. The first real sniff of something with a bit of size doesn't show up until late in the run, and even then, the conditions aren’t doing us any favours.

For the start, from Tuesday the 11th right through until basically the end of the third week of August, it’s a slow grind. The swell is tiny – mostly around 1ft to 2ft – with combined energy readings struggling to get above 200 (low moderate at best, often under 100, which is weak). The wind is a real pain: mostly cross, cross-on, or cross-off breezes, and the odd glassy moment pops up on a few morning windows, but the waves themselves are just too small and weak to get excited about. We get a few clean-looking mornings, like Wednesday the 12th, Thursday the 13th, and Saturday the 22nd, but the swell is barely a ripple. The water temp is a warm 82°F, about average for this time of year, so at least you won’t freeze while you’re waiting.

Around Tuesday the 25th, we finally see a pulse of better swell – a longer-period groundswell from the south with a 4ft to 5ft face and period up to 16 seconds. The combined energy jumps into the strong range (577 to 788). That’s the standout window, but here’s the kicker: the wind is a moderate to fresh cross-shore from the southwest, kicking up a cross-chop. It’s clean-ish, but not glassy, and that long-period south swell can be a bit tricky on a river mouth – tends to shut down or break too straight. This is really only for the experienced crew; 5ft might be a bit much for beginners, especially with that chop. The Sakawa River is fairly consistent but exposed to the east, and the optimum swell for it is from the southeast, but we’re getting it from the south. It’s the best we’ve got, but it’s not a home run.

Crowds are “sometimes” a thing here, so you might bump into a few others if you do paddle out on the 26th. Otherwise, it’s a long wait. Honestly, for most of this 16-day outlook, the conditions are so poor and the swell so weak, you’d be better off keeping the board in the car and checking back in a week.

Rusty.

Short Range Forecast

Heavy rain (total 30mm), heaviest during Tue night. Warm (max 28°C on Thu morning, min 21°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Fri afternoon. Warm (max 29°C on Fri morning, min 24°C on Sat night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
1
1
0
1
0
1
1
0
0
0
0
0
0
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)
0.6
E
11
0.6
SSW
11
0.5
SSW
10
0.5
SSW
10
0.5
SSW
10
0.4
SSW
10
0.5
S
10
0.5
S
9
0.6
E
11
0.5
E
10
0.5
E
10
0.5
E
10
0.7
SE
9
0.9
ESE
10
0.9
ESE
10
0.8
E
11
0.5
E
11
0.5
S
10
0.4
SE
11
0.4
SE
11
0.4
SSW
9
Wave Graph
Metric surfscale
Energy kJ
86
94
58
58
59
39
49
45
82
52
56
51
79
132
163
149
58
46
30
32
25
Wind (km/h)
10
SW
20
SW
15
SE
10
NNE
10
NNW
15
N
15
NNE
10
ENE
10
NNE
15
NNE
20
NE
15
N
20
NNE
15
ENE
10
NE
10
S
10
S
5
W
5
E
10
S
5
W
Wind State
cross
cross
on
cross-off
off
cross-off
cross-off
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross
cross
cross-on
cross-on
cross-off
glassy
cross-on
cross-off
High Tide
5:04PM1.45m
3:16AM1.49m
5:30PM1.47m
4:10AM1.55m
5:55PM1.48m
4:59AM1.57m
6:17PM1.48m
5:45AM1.54m
6:38PM1.48m
6:30AM1.47m
6:58PM1.47m
7:14AM1.36m
7:18PM1.46m
Low Tide
9:44AM0.04m
10:06PM0.99m
10:28AM0.00m
10:44PM0.87m
11:08AM0.03m
11:20PM0.74m
11:43AM0.11m
11:56PM0.62m
12:15PM0.24m
00:33AM0.52m
12:43PM0.39m
1:10AM0.46m
1:08PM0.55m
1:49AM0.43m
cloud
part cloud
heavy rain
light rain
light rain
rain showers
rain showers
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
clear
part cloud
part cloud
part cloud
clear
rain showers
clear
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
5:00
5:01
5:01
5:03
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:36
6:35
6:34
6:32
6:31
6:30
 mm
19
3
2
2
1
1
2
5
4
1
2
Temp °C
26
25
24
22
24
23
28
28
26
29
29
25
29
29
25
27
28
26
29
29
27
Feels °C
28
26
25
24
25
23
30
31
30
31
30
27
29
30
26
30
32
30
33
33
32
  • 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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