Surf Forecasts:
Sakawa River surf forecast from 29 Aug 2026:
- Best quality surf: Monday 31 Aug, 9PM (local time) - 1.5ft (0.4m), 13s period, ESE swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 3PM (local time) - 2ft (0.6m), 12s period, E swell with 103 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 9PM (local time) - 1.5ft (0.4m), 13s period with ESE 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 Monday (Aug 31) at 9PM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.3m and 9s. Another secondary swell of 0.3m and 3s 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 0.6m 12s and forecast to arrive on Tuesday (Sep 01) at 3PM. 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 Sunday (Aug 30) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 31st Aug) | 1.5ft (0.4m) 13s |
| Best Surf | 9PM (Mon 31st Aug) | 1.5ft (0.4m) 13s |
| Most Powerful | 3PM (Tue 1st Sep) | 2ft (0.6m) 12s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what’s heading for the Sakawa River.
Right now, it’s a slow start. For the first week and a half, it’s flat out. The waves are tiny and the wind is all over the place, so don’t bother. There’s a long gap of nothing until the 7th of September.
The real action starts to build towards the second week of September. The first sign of life is around Monday the 7th of September. The swell is pushing through, with a 4ft SE swell (combined energy of 301), but it’s a bit crossed-up with the wind. It’s not clean. By Monday afternoon, the swell jumps to 7ft from the ESE, and the energy is up to 949, but the wind is blowing straight onshore, making it a messy, choppy mess. Tough paddle.
The 8th and 9th of September keep the size up, with 6ft to 4ft SE swells, but the wind is either cross-onshore or onshore, and the period is 11 to 12 seconds. It’s a grind. The water temp is about average for this time of year.
Now, here’s the standout. The morning of the 10th of September. The Sakawa River is looking like the pick. We’ve got a 6ft SE swell, with a period of 12 seconds, and the wind is coming from the north at 16 mph, which is a clean cross-offshore breeze. The combined energy is a solid 1114, so there’s plenty of power. The swell direction is SE, and the spot likes an optimum SE swell direction, so it’s a perfect match. It’s a fairly consistent break, so you can expect some waves, but crowds can be a factor sometimes. For intermediate surfers, this is the best on offer.
The 13th of September morning is another one to circle. The swell drops a touch to 5ft from the SSW, but the wind goes glassy, and the period is a long 14 seconds. The combined energy is 1095, so it’s got grunt. That long period is a groundswell, and it’ll be powerful, but it might be a bit too straight for a river mouth. It’s a promising one, but we’re a way out, so it’s less certain.
After that, the swell hangs around but the wind gets messy again. The 14th of September sees a 3ft SSW swell with light cross-shore wind, but it’s fading. So, if you’re chasing the good stuff, lock in the morning of the 10th of September for the Sakawa River. That’s the one.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 29°C on Tue afternoon, min 21°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Thu night. Warm (max 29°C on Wed morning, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 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 11 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 14 | ESE 13 | E 12 | E 12 | ESE 11 | ESE 10 | ESE 8 | ESE 7 | SE 7 | S 8 | SE 6 | SE 7 | ESE 9 | ESE 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 29 | 25 | 18 | 16 | 19 | 36 | 56 | 73 | 103 | 97 | 86 | 22 | 37 | 48 | 43 | 43 | 23 | 30 | 35 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | glassy | cross | cross | cross-off | cross-on | cross-on | glassy | glassy | cross-on | cross-off | cross-on | cross | cross | cross-on | glassy | cross |
High Tide | 5:33AM1.50m | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | 6:56AM1.41m | 6:47PM1.51m | 7:44AM1.31m | 7:09PM1.49m | 8:44AM1.20m | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | |||||||
Low Tide | 11:38PM0.52m | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | 12:44PM0.57m | 1:22AM0.32m | 1:11PM0.72m | 2:06AM0.32m | 1:35PM0.87m | 3:03AM0.35m | 1:53PM1.01m | |||||||
 |  | |  |  | | |  | |  | | | | |  |  | | | | |
 | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — |
 | 6:15 | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 7 | — | — | 2 |
Temp °C | 22 | 24 | 26 | 25 | 26 | 27 | 26 | 28 | 29 | 27 | 29 | 29 | 27 | 29 | 28 | 26 | 23 | 24 | 24 |
Feels °C | 24 | 28 | 30 | 30 | 29 | 31 | 30 | 31 | 32 | 32 | 32 | 32 | 31 | 31 | 30 | 29 | 26 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SE 10 | SE 9 | ESE 13 | E 12 | E 12 | ESE 11 | ESE 10 | ESE 8 | ESE 7 | SE 7 | SE 7 | SE 6 | SE 7 | ESE 9 | ESE 6 |
| kJ | 18 | 18 | 18 | 10 | 15 | 14 | 56 | 73 | 103 | 97 | 86 | 22 | 33 | 43 | 37 | 43 | 23 | 30 | 35 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 10 | SE 10 | SSW 7 | SSW 7 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 8 | S 8 | ESE 10 | SSW 8 | SSW 8 | SE 6 | S 8 |
| kJ | 29 | 25 | 16 | 16 | 11 | 11 | 15 | 14 | 14 | 14 | 22 | 22 | 35 | 48 | 19 | 21 | 20 | 14 | 4 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | E 11 | ESE 9 | E 5 | ESE 14 | ESE 14 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | E 10 | SE 10 | SE 10 | SE 9 | SSW 8 | SE 9 |
| kJ | 9 | 2 | 8 | 1 | 19 | 36 | 14 | 16 | 16 | 16 | 17 | 20 | 37 | 17 | 15 | 15 | 12 | 24 | 12 |
Wind waves Height (m) Direction Period (s) | NNE 3 | NE 3 | — | — | — | NNE 3 | NE 3 | NE 3 | — | — | — | S 2 | SSW 2 | — | S 8 | — | ENE 3 | NE 3 | NE 3 |
| kJ | 4 | 2 | — | — | — | 1 | 1 | 1 | — | — | — | 1 | 1 | — | 43 | — | 8 | 2 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 96 | 82 | 50 | 82 | 96 | 50 | 0 | 50 | 50 | 0 | 0 | 114 | 0 | 68 | 68 | 100 | 66 | 9 | 66 |
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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