Surf Forecasts:
Sakawa River surf forecast from 29 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 12PM (local time) - 11ft (3.5m), 17s period, SE swell with cross-onshore winds.
- Most powerful swell: Wednesday 5 Aug, 9AM (local time) - 13ft (4.0m), 16s period, SSE swell with 8,649 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 9PM (local time) - 2.5ft (0.8m), 6s period with SW 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 Thursday (Jul 30) at 9PM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.4m and 7s. Another secondary swell of 0.3m and 10s is also forecast. 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 4.0m 16s and forecast to arrive on Wednesday (Aug 05) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Aug 05) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 30th Jul) | 2.5ft (0.8m) 6s |
| Best Surf | 12PM (Tue 4th Aug) | 11ft (3.5m) 17s |
| Most Powerful | 9AM (Wed 5th Aug) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here again for the imperial version. Let’s break it down for the Sakawa River.
It’s a slow start. Through the end of July and into the first of August, we’ve got nearly nothing. Tiny 1ft to 2ft slop, weak energy (46), and light winds that don’t do much. You’re better off staying home.
The first real chance comes on Sunday, August the 2nd. The morning is the one to target. A clean 3ft swell from the ESE, with a long 16-second period – that’s true groundswell. The energy is building (446), and the wind is glassy. This is a river break, so that long period will wrap in nicely. It’s small but clean. The afternoon picks up to 4ft, but the wind turns cross-onshore and there’s a risk of storms. Still, the morning is the highlight of the smaller days.
Then it gets big. From Monday the 3rd we see 7ft to 8ft ESE swell, and by Tuesday the 4th we’re looking at 10ft to 12ft SE swell with a long 17-second period. The energy is massive (5337, then 7286). The wind is light and favourable, but at these sizes, the Sakawa River is for experts only. The files say it’s too big for the break, and I’d back that. It’s more of a kite-surfing show at that point.
Through the second week, the swell drops back. Friday the 7th has some 8ft leftovers, but the wind is cross-onshore. From the 8th onward it fades to poor, choppy, and inconsistent conditions. The energy drops to under 300 by the end, with moderate breezes messing up the surface. Not worth your time.
So, your best bet is Sunday morning, August the 2nd for a clean, small session. If you’re an adrenaline junkie, Tuesday the 4th has the size for experts.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Fri night. Warm (max 31°C on Thu morning, min 26°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Warm (max 31°C on Sun afternoon, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | S 7 | S 6 | S 6 | SSW 7 | SE 9 | ESE 15 | ESE 16 | ESE 16 | SE 15 | SE 16 | ESE 17 | SE 17 | SE 17 | SE 17 | SE 17 | SE 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 27 | 23 | 18 | 23 | 22 | 19 | 9 | 12 | 21 | 177 | 430 | 530 | 1031 | 2378 | 3146 | 3730 | 5337 | 7286 | 7637 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-off | glassy | cross-on | glassy | on | cross-on | glassy | glassy | cross-on | cross | cross | on | cross | cross-on | on | cross |
High Tide | 4:21AM1.46m | 6:13PM1.42m | 5:00AM1.48m | 6:35PM1.44m | 5:38AM1.47m | 6:56PM1.46m | 6:18AM1.43m | 7:18PM1.46m | 7:00AM1.37m | 7:41PM1.46m | 7:48AM1.28m | 8:05PM1.45m | |||||||
Low Tide | 10:59PM0.90m | 11:21AM0.13m | 11:31PM0.83m | 11:50AM0.15m | 00:04AM0.75m | 12:19PM0.20m | 00:38AM0.68m | 12:47PM0.29m | 1:15AM0.61m | 1:15PM0.41m | 1:55AM0.55m | 1:44PM0.55m | 2:41AM0.50m | ||||||
 |  |  |  |  | | | | | | | |  | | | | | | | |
 | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — |
 | 6:50 | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | — | — | 1 | 1 | — | — | 2 | — | 1 | 1 | — | 1 | — | — | — | — | — | — | — |
Temp °C | 29 | 31 | 30 | 29 | 31 | 31 | 27 | 29 | 30 | 27 | 30 | 31 | 28 | 29 | 30 | 26 | 29 | 30 | 27 |
Feels °C | 32 | 33 | 33 | 34 | 34 | 34 | 32 | 34 | 34 | 32 | 34 | 35 | 34 | 32 | 33 | 30 | 31 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | S 7 | S 6 | SE 9 | SSW 7 | S 5 | ESE 15 | ESE 16 | ESE 16 | SE 15 | SE 16 | ESE 17 | SE 17 | SE 17 | SE 17 | SE 17 | SE 16 |
| kJ | 27 | 17 | 18 | 23 | 22 | 14 | 9 | 2 | 21 | 177 | 430 | 530 | 1031 | 2378 | 3146 | 3730 | 5337 | 7286 | 7637 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 13 | ESE 9 | SE 9 | SSW 6 | SE 8 | SSE 9 | SE 9 | E 15 | E 14 | E 14 | ENE 14 | — | — | — |
| kJ | 23 | 23 | 14 | 14 | 14 | 7 | 8 | 12 | 4 | 10 | 8 | 41 | 38 | 16 | 36 | 62 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 12 | SE 12 | SE 12 | SE 13 | SE 11 | SE 11 | ESE 3 | SE 9 | ESE 4 | SSE 9 | SSE 9 | — | — | — | — | — | — | — |
| kJ | 8 | 6 | 6 | 6 | 6 | 5 | 5 | 1 | 12 | 2 | 8 | 17 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | S 6 | ESE 3 | — | ESE 4 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 19 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 50 | 50 | 100 | 50 | 50 | 99 | 477 | 477 | 53 | 0 | 0 | 27 | 27 | 27 | 27 | 22 | 40 | 27 | 22 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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