Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 2 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
25.9° C
0.0° 

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 19 Jul 2026:

  • Best quality surf: Sunday 26 Jul, 6AM (local time) - 1ft (0.3m), 15s period, SE swell with glassy winds.
  • Most powerful swell: Monday 27 Jul, 6AM (local time) - 2.5ft (0.7m), 10s period, S swell with 106 kJ wave energy.
  • Next surfable swell (1★+): Sunday 26 Jul, 6AM (local time) - 1ft (0.3m), 15s period with SE 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 Sunday (Jul 26) at 6AM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.3m and 15s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Sakawa River in the next 16 days are 0.7m 10s and forecast to arrive on Monday (Jul 27) 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 0.5m 3s period and expected on Tuesday (Jul 21) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sun 26th Jul)1ft (0.3m) 15s
Best Surf 6AM (Sun 26th Jul)1ft (0.3m) 15s
Most Powerful 6AM (Mon 27th Jul)2.5ft (0.7m) 10s

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


The Lowdown

Alright, Rusty here, let’s talk about what’s coming up for the Sakawa River.

First thing you need to know: the river mouth is running flat for the first week. There’s no surf worth even paddling out for through to the end of July. The water temp is sitting at a very normal 79°, so that’s not the issue. The problem is a total lack of size and energy. The combined energy is barely hitting 39 (weak) and swell heights are stuck around 0.7 ft to 1 ft. Winds are light and mornings are mostly glassy, but with no swell, glass just means a flat, pretty lake. Tuesday morning the 21st is glassy and clean, but the wave height is a pathetic 0.7 ft with a long period of 11 seconds, meaning it’s just a gentle groundswell that won’t break properly here. Even the afternoons with a bit more wind are just ripples.

We do get a little pulse of energy on the 27th of July. The combined energy climbs to 220 (moderate) and the swell hits 2 ft from the SE on Monday morning with glassy wind. The guidance says there’s surfable waves but very ordinary conditions, so it’s a tiny step up, but nothing to get excited about.

Now, the real standout is Tuesday the 28th of July. You want to be in the water first thing. Morning glass, the swell jumps to 6 ft from the S, with a period of 14 seconds, and the combined energy is a meaty 1361 (strong). The guidance says excellent surf conditions for experienced surfers, and that’s spot on. At 6 ft, this is too big for beginners, but for an intermediate surfer, this is the best run of the forecast. The wind is glassy, so the river mouth will be clean. The swell direction is S, which is not the optimum SE direction, but at this size and period, it’ll still push in nicely. Expect some long lines and proper sets. The afternoon on the 28th gets a bit messy with cross-onshore wind and a chance of storms, so hit the morning session.

Wednesday the 29th is also a good call. Another glassy morning, 6 ft from the SSW with a 14-second period, and combined energy of 1132 (strong). The guidance says expect very good surf conditions, and with glassy wind, it’s going to be a solid follow-up day. The afternoon holds the same quality with glassy wind again, so you get a full day of fun.

After that, things drop off. Thursday the 30th goes marginal, with 3 ft to 5 ft and cross-onshore wind. The energy is still moderate but the quality drops. Then Friday the 31st gets wild. The swell jumps to 10 ft in the morning and 15 ft in the afternoon from the S, with a very long period of 15 seconds. The combined energy in the afternoon is a massive 11271 (very strong). That is a serious, heavy river mouth wave. The guidance says the swell is predicted to be too big for this break, and I’d agree. At 15 ft, you’d need to be a top-tier expert, and even then, the river mouth setup will be a washing machine. The wind is cross-offshore, which is clean, but the size is just too much for the break. This is more of a situation for the experienced big-wave crew only, and even then, it’s a maybe.

The first week of August sees a steady decline. Saturday the 1st has a 7 ft to 8 ft swell but with fresh onshore winds and heavy rain, it’s messy and not recommended. By Sunday the 2nd, it’s back to 4 ft with weak energy, and by Monday the 3rd, it’s practically flat again.

So, to sum it up: the best surfing is Tuesday the 28th and Wednesday the 29th of July. That’s your window. Get the Sakawa River early, enjoy the glass, and enjoy the strong, clean S swell. The rest of the forecast is a mix of flat, too big, or too messy.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Tue afternoon. Warm (max 31°C on Tue morning, min 27°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 81mm), heaviest during Fri night. Warm (max 31°C on Thu afternoon, min 24°C on Fri night). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
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
0
0
0
0
0
0
0
0
0
0
0
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)
0.4
SE
7
0.3
E
9
0.3
SE
8
0.2
ESE
11
0.2
ESE
11
0.2
ESE
11
0.6
SW
5
0.2
ESE
11
0.2
SSE
11
0.3
SE
10
0.4
SE
10
0.3
SE
18
0.3
SE
18
0.3
SE
17
0.3
SE
16
0.3
SE
16
0.3
SE
16
0.3
SE
15
0.3
SE
15
0.4
SE
14
0.4
SE
14
Wave Graph
Metric surfscale
Energy kJ
14
13
11
12
11
11
14
11
11
16
25
49
49
45
41
40
39
35
41
74
52
Wind (km/h)
5
SSE
10
S
10
W
5
S
10
SSW
10
W
5
SSE
10
S
5
NW
10
E
5
SW
5
N
10
ESE
5
SSW
5
E
10
NE
10
NNE
5
NE
5
SSE
15
S
10
WSW
Wind State
cross-on
cross-on
cross-off
glassy
cross-on
cross-off
on
cross-on
off
cross-on
glassy
glassy
on
glassy
cross-on
cross
cross-off
cross
cross-on
cross-on
cross-off
High Tide
8:47PM1.39m
9:26AM1.10m
9:12PM1.37m
10:59AM1.02m
9:42PM1.35m
1:52PM1.02m
10:23PM1.31m
4:25PM1.11m
11:26PM1.28m
4:24PM1.19m
00:48AM1.28m
4:44PM1.26m
1:59AM1.31m
Low Tide
2:19PM0.59m
3:26AM0.59m
2:44PM0.76m
4:27AM0.55m
3:05PM0.90m
5:40AM0.52m
3:15PM1.02m
6:57AM0.47m
5:07PM1.11m
8:03AM0.40m
7:57PM1.13m
8:56AM0.32m
9:09PM1.09m
clear
clear
clear
clear
thunderstorm
clear
clear
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:41
4:43
4:43
4:43
4:45
4:46
4:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:55
6:54
6:54
6:53
6:52
6:52
6:52
 mm
2
1
2
3
10
1
20
46
1
Temp °C
30
30
28
31
31
29
31
30
28
30
31
27
28
26
25
25
26
25
27
27
26
Feels °C
33
34
32
36
36
34
35
35
33
35
36
32
32
31
30
28
30
28
30
30
30
  • 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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