Sakawa River Surf Break

Sakawa River Surf Forecast and Surf Report

Lat Long: 35.24° N 139.15° E

Issued: 8 am 06 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sakawa River sea temperature is
23.6° C

Slightly cooler than normal

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 6 Jul 2026:

  • Best quality surf: Wednesday 8 Jul, 12AM (local time) - 5.5ft (1.7m), 16s period, SSE swell with glassy winds.
  • Most powerful swell: Friday 10 Jul, 9PM (local time) - 8ft (2.4m), 16s period, S swell with 2,972 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 7 Jul, 3AM (local time) - 2.5ft (0.8m), 12s 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 Tuesday (Jul 07) at 3AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.7m and 7s. 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 2.4m 16s and forecast to arrive on Friday (Jul 10) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Jul 07) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 7th Jul)2.5ft (0.8m) 12s
Best Surf12AM (Wed 8th Jul)5.5ft (1.7m) 16s
Most Powerful 9PM (Fri 10th Jul)8ft (2.4m) 16s

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


Updates in  hr  min  s Forecast update imminent

Alright, Rusty here. Let’s have a look at the Sakawa River.

Right off the bat, we’ve got a bit of a slow start, with the first real hope showing up Monday afternoon on July 6th. The swell is small, only 3ft from the SE, but the wind goes glassy, and the energy is sitting at 320 (moderate). That’s your first chance to get a clean, tiny wave on a river mouth setup. It won’t be big, but if you’re after a cruisy session with no wind, that’s your window. Water temp is 75°, which is about normal for this time of year, nothing weird.

Tuesday July 7th picks up a bit with a 3ft SSE swell and a period of 15 seconds – that’s proper long-period groundswell, so the energy jumps to 629 (moderate). The morning has a cross-shore wind from the NE, so it’ll be a little tricky, but still surfable. The afternoon sees cleaner conditions with a light offshore from the SE, and the wave height bumps to 5ft (moderate size but still fine for intermediates). The swell direction is SE, which lines up nicely with the optimum for the river mouth. This could be a decent day.

Wednesday July 8th brings more size: 5ft SE in the morning, glassy offshore wind, and energy at 1936 (strong). That’s a big jump in power, but the period is still 14 seconds, so it’s groundswell. The afternoon gets bigger at 7ft from the SSE, but the wind turns cross-onshore, so expect some chop. The river mouth should handle this well, but it’ll be getting solid for beginners.

Thursday July 9th and Friday July 10th see the swell hold in the 6ft to 8ft range, with long periods (15-16 seconds) and strong energy readings (1972 to 3385). The wind stays mostly cross-onshore or light offshore, so it’s not perfect but still rideable. By Saturday July 11th, the swell peaks at 8ft from the S with energy at 3385 – that’s very strong. However, the wind is cross-onshore and the period is 16 seconds, so this long-period swell might break a bit straight at the river mouth, and the crowd factor is “sometimes” busy, so keep that in mind. This is expert territory at 8ft and up.

Sunday July 12th things drop off fast: 4ft SSW with choppy cross-onshore wind. The energy plummets to 555 (moderate). After that, we go into a quiet spell from Monday July 13th through to Thursday July 17th. Swell sizes are under 3ft, periods drop to 9-11 seconds, and energy is low (164 to 292). The wind is mostly cross-onshore or glassy at times, but the surf is pretty ordinary. This is a gap of about 5 days with nothing worth paddling out for.

Then Friday July 18th afternoon shows a pulse of new swell: 8ft SE with a 12-second period and energy at 1649 (strong). The wind is light cross-onshore, so it’s not pristine but it’s a real uptick. Saturday July 19th keeps that momentum with 8ft ESE in the morning, period at 12 seconds, and strong energy (1683). That’s a solid, powerful swell, but it’s only for experienced surfers at that size, and the direction isn’t quite optimum. The afternoon drops to 7ft but with lighter offshore wind, so it could clean up by the end of the day.

By the final days (July 20th to 22nd), the swell fades quickly: 3ft and below, weak energy (108 to 314), and mostly cross-onshore or offshore winds. Not much to get excited about.

The standout here is Wednesday July 8th morning: 5ft SE swell, glassy offshore wind, strong energy (1936), and the swell direction matches the optimum. That’s your best bet for clean, powerful waves on a river mouth that handles groundswell well. Friday July 10th afternoon is another strong option with 8ft S swell, but the cross-onshore wind knocks it down a notch.

Overall, it’s a pulsey two weeks. Get on it early July, then expect a lull, and maybe score again around the 18th-19th.

Rusty.

Short Range Forecast

Light rain (total 7mm), mostly falling on Mon morning. Warm (max 26°C on Tue afternoon, min 21°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Thu morning, min 22°C on Thu night). Wind will be generally light.

Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
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
2
1
1
2
4
3
3
4
3
2
4
3
2
3
2
1
3
1
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)
0.6
SE
14
0.8
SE
14
0.8
SE
12
0.9
SSE
15
1.4
SE
15
1.7
SSE
16
1.6
SE
14
2.1
SSE
16
1.5
SSE
14
1.8
SSE
15
2.1
S
15
2.2
S
16
2.3
S
15
2.4
S
16
2.4
SSW
16
2.2
SSW
17
1.9
SSW
16
1.5
SSW
16
1.2
SSW
14
1
SSW
13
0.8
S
10
Wave Graph
Metric surfscale
Energy kJ
169
238
217
367
773
1322
1016
2107
886
1480
2012
2280
2383
2936
2816
2579
1762
1041
519
367
133
Wind (km/h)
10
ESE
5
ESE
10
NE
15
NE
10
SE
5
ENE
5
ESE
10
SSE
5
SW
5
SE
10
S
5
SW
10
SSE
15
S
10
SSW
10
SSE
15
S
10
WSW
10
S
20
S
10
SW
Wind State
on
glassy
cross
cross
on
glassy
on
cross-on
glassy
on
cross-on
glassy
on
cross-on
cross
cross-on
cross-on
cross-off
cross-on
cross-on
cross-off
High Tide
9:08PM1.40m
8:58AM1.15m
9:41PM1.39m
10:25AM1.08m
10:19PM1.38m
12:24PM1.08m
11:05PM1.37m
2:22PM1.17m
00:00AM1.38m
3:42PM1.29m
1:04AM1.41m
4:37PM1.39m
2:07AM1.45m
Low Tide
2:20PM0.45m
3:25AM0.70m
2:59PM0.60m
4:28AM0.62m
3:45PM0.76m
5:38AM0.51m
4:48PM0.92m
6:49AM0.38m
6:20PM1.05m
7:55AM0.23m
7:58PM1.11m
8:54AM0.09m
9:12PM1.12m
light rain
light rain
rain showers
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:33
4:33
4:35
4:35
4:35
4:37
4:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:00
7:00
7:00
7:00
6:59
 mm
3
2
2
Temp °C
22
22
22
25
26
23
24
25
23
26
25
23
26
25
23
24
25
23
26
26
23
Feels °C
24
25
24
26
27
26
26
26
26
28
27
26
28
27
25
26
26
26
27
26
24
Swell 1
Height (m)
Direction
Period (s)
0.9
SE
7
0.8
SE
14
0.8
SE
12
0.9
SSE
15
1.4
SE
15
1.7
SSE
16
1.6
SE
14
2.1
SSE
16
1.5
SSE
14
1.8
SSE
15
2.1
S
15
2.2
S
16
2.3
S
15
2.4
S
16
2.4
SSW
16
2.2
SSW
17
1.9
SSW
16
1.5
SSW
16
1.2
SSW
14
1
SSW
13
0.8
S
10
Energy kJ
77
238
217
367
773
1322
1016
2107
886
1480
2012
2280
2383
2936
2816
2579
1762
1041
519
367
133
Swell 2
Height (m)
Direction
Period (s)
0.6
SE
14
0.1
SW
7
0.8
ESE
7
0.8
SE
12
0.3
SSE
20
0.9
SSE
16
1.1
SSE
18
0.8
ESE
8
1.2
S
16
0.8
S
19
0.8
ESE
8
0.4
ESE
8
0.4
ESE
8
0.6
SSW
22
0.2
ESE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.3
SE
11
0.5
SW
13
Energy kJ
169
2
61
158
80
475
808
87
774
455
85
24
24
314
9
28
35
28
18
80
Swell 3
Height (m)
Direction
Period (s)
0.1
S
7
0.1
S
7
0.4
SE
18
0.7
ESE
7
0.2
WSW
6
0.9
ESE
8
0.7
ESE
8
0.5
ESE
8
0.9
ESE
10
0.2
ESE
9
0.1
SE
15
0.2
ESE
9
0.3
ESE
9
0.3
SE
10
Energy kJ
1
1
78
40
4
112
58
37
135
9
8
8
16
17
Wind waves
Height (m)
Direction
Period (s)
0.9
SE
7
0.9
ESE
6
0.5
S
3
Energy kJ
79
64
5
Nearest Offshore or Glassy
Rating
(10 max)
1
2
1
2
2
4
4
5
4
3
4
4
5
4
7
5
4
3
4
4
1
Distance (km)
454
0
22
30
41
0
30
53
0
40
58
0
53
114
100
58
114
0
100
68
0
Best forecast wave conditions in Kanagawa
Rating
(10 max)
2
1
2
2
4
4
5
4
4
4
5
4
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
2
3
4
3
4
5
5
5
5
4
5
9
9
7
5
9
5
4
4
3
Header Global
Rating
(10 max)
6
7
8
7
5
5
9
6
9
9
5
6
5
4
5
5
4
5
4
4
5
  • 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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