Surf Forecasts:
Sakawa River surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 3PM (local time) - 11ft (3.5m), 10s period, SSE swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 11ft (3.5m), 10s period, SSE swell with 2,884 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 3AM (local time) - 2ft (0.6m), 9s period with SSW 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 Saturday (Sep 05) at 3AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.6m 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 3.5m 10s and forecast to arrive on Monday (Sep 07) at 3PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Sunday (Sep 06) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 5th Sep) | 2ft (0.6m) 9s |
| Best Surf | 3PM (Mon 7th Sep) | 11ft (3.5m) 10s |
| Most Powerful | 3PM (Mon 7th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s comin’ down the line for the Sakawa River.
Alright, so the first few days are basically a write-off. Saturday the 5th through Sunday the 6th, it’s just small, weak, and messy. We’re talkin’ tiny waves with poor conditions, not worth paddling out for. You’re better off waxing your board and waiting.
Then things get interesting. Monday the 7th is where it’s at. The swell jumps up, and we’ve got a solid 8ft to 12ft groundswell from the south-southeast, with a period of 10 seconds. The energy is massive – we’re talking 4885 (combined energy) for the afternoon. That’s a lot of water moving. Now, the morning sees a clean 8ft with offshore wind, but it’s also heavy rain. The afternoon? Glassy conditions, 12ft, with the wind flat calm. That’s a recipe for perfection, but only for the experienced crew. This is too big for beginners. It’s a river mouth, so with that long-period groundswell, it’ll be a bit wonky and straight at times, but the power will be there. This is the standout session of the whole outlook.
Tuesday the 8th drops back a bit, with 7ft and 7ft from the SSE, but the wind is light cross-shore and the tide is looking questionable. It’s surfable, but nothing special compared to Monday.
Wednesday the 9th and Thursday the 10th see the swell settle into a nice, clean 5ft to 4ft range. The wind goes glassy or light offshore, and it cleans right up. Good for intermediates, with consistent, clean waves. A solid run of days.
From Friday the 11th onward, it’s a slow fade. The swell drops, the energy fades, and by the weekend of the 13th and 14th, we’re back to small, weak, and mostly cross-onshore junk. The second week is a total bust. From Saturday the 12th all the way through to Sunday the 20th, the forecast is just poor surf conditions with tiny, weak swells and no energy. A long gap of nothing.
The water temp is about average for this time of year, so no surprises there.
The call: If you’re an experienced surfer and you can handle some rain, Monday the 7th is your one and only standout. The afternoon session looks glassy with a mountain of swell. Don’t waste your energy on the rest.
Rusty.
Short Range ForecastHeavy rain (total 273mm), heaviest during Sun night. Warm (max 25°C on Fri night, min 21°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 65mm), heaviest during Tue night. Warm (max 25°C on Mon night, min 21°C on Thu morning). Wind will be generally light. | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | SSW 9 | S 9 | ESE 7 | ENE 4 | ESE 8 | ESE 8 | ESE 8 | S 10 | SSE 10 | SSE 11 | SSE 10 | SSE 10 | S 10 | S 9 | S 9 | S 9 | S 10 | S 9 | S 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 66 | 42 | 54 | 20 | 66 | 73 | 473 | 1019 | 2884 | 1841 | 934 | 794 | 573 | 372 | 282 | 436 | 347 | 229 | 145 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | glassy | glassy | cross | cross | cross | glassy | glassy | glassy | cross-off | cross-off | cross-off |
High Tide | 8:45PM1.32m | 3:36PM1.25m | 10:48PM1.25m | 3:45PM1.33m | 1:09AM1.28m | 4:04PM1.39m | 2:29AM1.38m | 4:25PM1.43m | 3:26AM1.47m | 4:45PM1.46m | |||||||||
Low Tide | 4:23AM0.38m | 6:11AM0.37m | 7:15PM1.21m | 7:42AM0.29m | 8:41PM1.09m | 8:43AM0.22m | 9:20PM0.95m | 9:30AM0.17m | 9:53PM0.79m | 10:09AM0.18m | 10:25PM0.63m | ||||||||
 |  |  |  |  |  |  | | |  |  | | |  | | | | |  | |
 | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — |
 | 6:07 | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — | — | 5:59 | — |
mm | 50 | 6 | — | — | — | 11 | 106 | 85 | 15 | 7 | 2 | 5 | 19 | 5 | 9 | 9 | 6 | 3 | 4 |
Temp °C | 25 | 22 | 22 | 21 | 23 | 21 | 22 | 24 | 24 | 25 | 24 | 24 | 23 | 24 | 24 | 24 | 22 | 21 | 21 |
Feels °C | 27 | 23 | 23 | 20 | 20 | 19 | 20 | 26 | 28 | 30 | 26 | 27 | 26 | 29 | 29 | 29 | 23 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | S 9 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | S 12 | SE 8 | SSE 10 | SSE 11 | SSE 10 | SSE 10 | S 10 | S 9 | S 9 | S 9 | S 10 | S 9 | S 9 |
| kJ | 66 | 42 | 54 | 19 | 66 | 73 | 259 | 613 | 1846 | 1841 | 934 | 794 | 573 | 372 | 282 | 436 | 347 | 229 | 145 |
Swell 2 Height (m) Direction Period (s) | SE 6 | ESE 7 | SSW 9 | SSW 8 | S 8 | SSE 8 | ESE 11 | S 10 | E 9 | E 9 | SSW 11 | SSW 11 | E 18 | SE 12 | SE 8 | SE 11 | ESE 11 | ESE 11 | ESE 10 |
| kJ | 10 | 18 | 26 | 14 | 5 | 13 | 12 | 689 | 155 | 106 | 24 | 73 | 6 | 6 | 119 | 5 | 11 | 22 | 18 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SSE 8 | SSE 8 | SE 12 | S 10 | — | — | — | — | SE 14 | E 9 | E 10 | E 17 | E 16 | E 16 | E 15 | E 15 | E 14 |
| kJ | 12 | 12 | 7 | 7 | 6 | 2 | — | — | — | — | 46 | 41 | 2 | 6 | 5 | 5 | 4 | 17 | 16 |
Wind waves Height (m) Direction Period (s) | NE 3 | E 4 | NE 3 | ENE 4 | NE 4 | NNE 5 | ESE 8 | S 10 | SSE 10 | — | NE 3 | NE 3 | NNE 3 | NNE 3 | NE 3 | NE 3 | NE 4 | NNE 4 | NNE 4 |
| kJ | 4 | 10 | 2 | 20 | 44 | 61 | 473 | 1019 | 2884 | — | 2 | 4 | 8 | 4 | 2 | 2 | 14 | 19 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 38 | 42 | 0 | 450 | 450 | 515 | 472 | 0 | 29 | 0 | 9 | 41 | 9 | 0 | 0 | 0 | 0 | 0 | 0 |
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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