Surf Forecasts:
Sakawa River surf forecast from 7 Sep 2026:
- Best quality surf: Monday 7 Sep, 3PM (local time) - 10ft (3.0m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 10ft (3.0m), 9s period, S swell with 1,372 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 3PM (local time) - 10ft (3.0m), 9s period with S 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 (Sep 07) at 3PM. The primary swell is predicted to be 3.0m and 9s period with a secondary swell of 2.5m and 9s. Another secondary swell of 2.0m and 9s 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 3.0m 9s and forecast to arrive on Monday (Sep 07) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Wednesday (Sep 09) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Mon 7th Sep) | 10ft (3.0m) 9s |
| Best Surf | 3PM (Mon 7th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 3PM (Mon 7th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Right, let’s have a look at what’s on offer at the Sakawa River.
We’ve got a bit of a tease to start the week. Monday morning is looking decent with a solid 6ft swell from the south, pushing through with a 10-second period. The water’s sitting at 82°, which is a touch warmer than normal for this time of year. The wind is glassy from the WSW at just 3 mph, so the surface will be clean. The combined energy is moderate at 889, and it’s a river mouth, so the longish period should wrap in nicely. That’s a good session for intermediate surfers. Monday afternoon, the swell jumps to 10ft from the south, period drops to 9 seconds, but the wind swings to a light cross-off – that’s going to be a big, powerful wave, only for experienced surfers. The energy is very strong (3076).
Tuesday morning starts with a clean 5ft south swell, glassy calm, and good energy (441). That’s another solid window for intermediates. Tuesday afternoon gets a bit messy with a cross-shore wind and a risk of storms, so it’s a bit of a write-off.
Wednesday offers a split. The morning has a 6ft SSW swell but a 9 mph cross-shore wind, making it look choppy and average. Wednesday afternoon, the wind drops to glassy from the north, and the swell is back up to 7ft from the south with 9 seconds and strong energy (1298). That’s the standout window of the week – clean, powerful, and consistent. It’s getting into the expert zone, but for those who know the river, it’ll be firing.
Thursday drops off quickly. The swell is down to 4ft in the morning and 3ft in the afternoon, with light cross-off winds. It’s surfable, but ordinary. From Friday morning onward, the swell collapses. We’re looking at tiny waves, mostly under 3ft, for the rest of the 16-day window. The period drops, the energy is weak (down to 80 or less), and the wind is inconsistent. There’s a real gap from Friday, 11 September, all the way through to the end of the period on 22 September – that’s almost two weeks of flat, poor conditions.
The best call is Wednesday afternoon, 9 September. That 7ft south swell with glassy offshore wind is the only real highlight. The river mouth will handle that longish period well, so it’s worth a paddle. After that, it’s a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 94mm), heaviest during Mon morning. Warm (max 29°C on Wed morning, min 21°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Thu morning. Warm (max 25°C on Sat afternoon, min 20°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
AM | PM | 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) | S 10 | S 9 | SSE 9 | S 9 | SSW 10 | SSW 10 | SSW 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | SE 10 | ESE 14 | ESE 13 | ESE 13 | SE 9 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 654 | 1372 | 627 | 421 | 332 | 522 | 641 | 777 | 291 | 165 | 104 | 61 | 55 | 54 | 27 | 24 | 37 | 69 | 56 | 61 | 73 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | glassy | cross | cross-off | cross | glassy | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | glassy | glassy | glassy | cross-on | glassy |
High Tide | 3:45PM1.33m | 1:09AM1.28m | 4:04PM1.39m | 2:29AM1.38m | 4:25PM1.43m | 3:26AM1.47m | 4:45PM1.46m | 4:15AM1.53m | 5:05PM1.48m | 4:59AM1.54m | 5:24PM1.50m | 5:40AM1.52m | 5:42PM1.51m | ||||||||
Low Tide | 8:41PM1.09m | 8:43AM0.22m | 9:20PM0.95m | 9:30AM0.17m | 9:53PM0.79m | 10:09AM0.18m | 10:25PM0.63m | 10:43AM0.24m | 10:57PM0.49m | 11:14AM0.34m | 11:29PM0.37m | 11:42AM0.46m | 00:01AM0.29m | ||||||||
 | |  |  |  |  | | |  |  |  |  |  | |  | |  |  | | | | |
 | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — |
 | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:53 | — |
mm | 45 | 11 | 3 | — | 6 | 2 | — | 4 | 23 | 8 | 3 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 24 | 25 | 28 | 27 | 26 | 29 | 28 | 22 | 22 | 22 | 21 | 21 | 22 | 22 | 23 | 25 | 24 | 28 | 28 | 26 |
Feels °C | 27 | 28 | 30 | 32 | 31 | 31 | 32 | 33 | 23 | 24 | 23 | 22 | 23 | 24 | 25 | 26 | 29 | 28 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | S 10 | SSE 9 | SSE 9 | S 9 | SSE 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | S 7 | ESE 13 | SE 9 | SE 9 | SE 9 |
| kJ | 654 | 1073 | 627 | 421 | 326 | 240 | 399 | 492 | 291 | 165 | 104 | 61 | 55 | 54 | 27 | 15 | 15 | 69 | 29 | 61 | 73 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | SSW 9 | SSW 9 | ESE 10 | ESE 10 | SE 8 | ESE 10 | SE 10 | ESE 10 | ESE 11 | ESE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 10 | SSW 7 | ESE 13 | E 13 | SSW 11 |
| kJ | 235 | 631 | 315 | 10 | 10 | 104 | 10 | 24 | 10 | 11 | 10 | 14 | 9 | 10 | 19 | 24 | 23 | 9 | 56 | 29 | 23 |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 11 | ESE 10 | ESE 10 | ESE 10 | SE 12 | E 16 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | ESE 14 | S 8 | SSW 7 | SSW 7 | E 12 |
| kJ | — | — | 24 | 10 | 10 | 10 | 6 | 5 | 5 | 4 | 17 | 16 | 16 | 16 | 14 | 15 | 37 | 5 | 9 | 5 | 12 |
Wind waves Height (m) Direction Period (s) | N 3 | S 9 | SSW 9 | — | SSW 10 | SSW 10 | SSW 9 | S 9 | NE 4 | NE 4 | NE 3 | NNE 3 | NNE 3 | NNE 3 | NE 3 | NE 2 | NNE 3 | — | — | — | — |
| kJ | 3 | 1372 | 445 | — | 332 | 522 | 641 | 777 | 22 | 8 | 5 | 8 | 4 | 4 | 1 | 1 | 1 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 68 | 0 | 100 | 0 | 0 | 0 | 0 | 0 | 58 | 66 | 50 | 50 | 50 | 0 | 0 | 58 | 0 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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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