Sakawa River Surf Break

Lat Long: 35.24° N 139.15° E

Sakawa River Surf Forecast and Surf Report

Issued: 8 am 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
24.8° C
0.8° 

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 17 Jul 2026:

  • Most powerful swell: Friday 24 Jul, 12AM (local time) - 1ft (0.3m), 18s period, SE swell with 49 kJ wave energy.

Best Forecast Surf Conditions for Sakawa River this week:

The most powerful waves expected at Sakawa River in the next 16 days are 0.3m 18s and forecast to arrive on Friday (Jul 24) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12AM (Fri 24th Jul)1ft (0.3m) 18s

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


The Lowdown

Alright, let’s get into it. The Sakawa River is a river mouth setup, fairly exposed, and it needs a good SE swell to work. Right now, we’ve got a long stretch of nothing much happening. The first week is basically a write-off, with tiny swell and poor conditions. The real action doesn’t start until Sunday the 26th, so we’re looking at over a week of flat, crummy surf before anything worthwhile shows up.

The first few days, from Friday the 17th through to the 25th, are all coming in under 2ft with weak, messy wind. The swell is tiny, mostly from the SE, with periods all over the shop but no energy to speak of. The combined energy is barely cracking 40 or 50 – that’s weak, weak stuff. Winds are mostly cross-onshore or onshore, and the conditions are consistently called “poor.” It’s not worth a paddle. There’s a little spike in period on the 24th and 25th, hitting 18 seconds, but only 1ft of swell, so it’s all period and no push. Just a tease.

Then, Sunday the 26th morning, things start to shift. We get a jump to 3ft, SSE swell, with a 12-second period, and the combined energy jumps to 278, which is moderate. It’s still cross-onshore wind, though, so it’s messy. The rating is only a 1, and it’s described as “marginal.” The afternoon gets bigger, up to 4ft, but the wind picks up to 9 mph from the SSW, making it choppy. Not great.

Monday the 27th is where it gets interesting. The swell jumps to 7ft on the morning from the S, with a 14-second period, and the combined energy is a massive 2462. That’s strong, serious energy. Wind is light from the SSW, cross-onshore, but it’s manageable. The rating is a 3. This is the standout of the whole forecast. The swell is correctly from the optimum direction, and the size is solid for intermediate to advanced surfers. Afternoon sees 8ft, S swell, with a cross-shore wind, and the energy hits 3183. That’s very strong. It’s going to be a proper, powerful, long-period groundswell, perfect for the river mouth. The period is 14 seconds, so it’s a long-period groundswell – it should wrap in nicely and offer some good shaped waves. The caveat is that with a river mouth, the long period might make it a bit walled, but it’s still the best wave on offer.

Tuesday the 28th is still solid, with 7ft and 6ft from the S, 13-second period, and the energy is still very strong (1738 and 1207). Winds are light and onshore in the morning, shifting to onshore in the afternoon. Still a good option, but the wind is cleaner on Monday.

The end of the month, the 31st (Friday) morning, has a glimmer of hope. 7ft from the S, with a 9-second period, and the wind is light and cross-offshore. The conditions are called “clean,” and the score is 3. That’s a promising pick, but the period is shorter, so it’ll be a bit more wind-swell in nature. It’s a good second option.

After that, August 1st drops off quickly with the swell fading back to 3ft and 4ft and weak energy.

So, to sum it up: the first week and a half is a total bust. The real winner is Monday the 27th of July – that’s the day to circle. Big, powerful S swell, long period, and manageable wind. The Sakawa River mouth will be pumping. Tuesday the 28th is a solid follow-up, and the morning of Friday the 31st is a dark horse with clean, cross-offshore conditions. For the rest, it’s either too small, too windy, or just gone.

She’s a quiet start, but when it turns on, it turns on. Keep your eyes on the 27th.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Fri morning. Warm (max 29°C on Fri morning, min 25°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Wed afternoon. Warm (max 31°C on Wed afternoon, min 26°C on Mon night). Wind will be generally light.

Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
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
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SE
10
0.3
SE
10
0.3
ESE
9
0.4
SE
9
0.4
SE
8
0.4
ESE
10
0.4
ESE
10
0.4
SE
8
0.4
SE
7
0.4
ESE
9
0.3
ESE
9
0.3
E
9
0.3
E
10
0.2
ESE
11
0.6
SSW
6
0.4
SSW
6
0.5
S
6
0.3
SE
11
0.4
SE
10
0.4
SE
10
0.3
SE
18
Wave Graph
Metric surfscale
Energy kJ
15
15
15
31
25
31
31
21
19
28
16
14
18
12
21
13
15
18
26
25
49
Wind (km/h)
5
SE
10
SSE
10
SE
5
SE
10
S
10
S
10
S
15
S
5
WSW
5
S
10
S
10
WSW
10
SSW
10
SSW
10
W
5
S
10
S
10
NNE
5
ENE
5
E
10
ENE
Wind State
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-off
cross-on
cross-on
cross-off
cross
cross-on
cross-off
cross-on
cross-on
cross-off
cross-on
cross-on
cross
High Tide
7:33PM1.44m
6:35AM1.46m
7:58PM1.42m
7:26AM1.35m
8:23PM1.41m
8:21AM1.23m
8:47PM1.39m
9:26AM1.10m
9:12PM1.37m
10:59AM1.02m
9:42PM1.35m
1:52PM1.02m
10:23PM1.31m
Low Tide
12:43PM0.08m
1:00AM0.77m
1:19PM0.24m
1:45AM0.69m
1:50PM0.42m
2:33AM0.63m
2:19PM0.59m
3:26AM0.59m
2:44PM0.76m
4:27AM0.55m
3:05PM0.90m
5:40AM0.52m
3:15PM1.02m
thunderstorm
thunderstorm
rain showers
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
rain showers
thunderstorm
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:39
4:41
4:41
4:41
4:43
4:43
4:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:57
6:55
6:55
6:54
6:54
6:53
 mm
2
2
2
1
1
3
2
2
3
3
Temp °C
29
28
26
28
28
25
28
28
26
29
29
27
30
30
28
30
31
28
29
29
26
Feels °C
34
32
31
31
31
29
31
31
30
33
33
31
35
34
32
35
36
33
33
33
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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