Surf Forecasts:
Sakawa River surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 6AM (local time) - 6ft (1.9m), 8s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 10ft (3.0m), 9s period, SSE swell with 1,455 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 6AM (local time) - 6ft (1.9m), 8s 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 Monday (Sep 07) at 6AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 1.4m and 10s. 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-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Sep 06) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 7th Sep) | 6ft (1.9m) 8s |
| Best Surf | 6AM (Mon 7th Sep) | 6ft (1.9m) 8s |
| 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
Alright, let's take a look at what's on the cards for the Sakawa River over the next couple of weeks.
Honestly, the river is going to be pretty quiet for a while. We've got a long stretch of very ordinary conditions coming up, so don't rush out the door just yet. The first real chance of anything decent won't show up until around Tuesday the 8th of September.
The early part of the window is a write-off. Sunday the 6th and Monday the 7th are a mess with strong onshore winds and lumpy, choppy conditions. The swell energy is weak to moderate (69 to 153) on Sunday, but the wind is just ruining it. Monday the 7th gets a bit more size – up to 10ft from the SSE – but with a fresh cross-onshore breeze, it's just a messy, poor-quality wave. That's a lot of water moving around (combined energy of 1455), but it's not for paddling; that setup looks more interesting for kite surfing than paddle surfing.
The standout window is Tuesday the 8th and Wednesday the 9th. On Tuesday morning, the wind goes glassy, and we've got a clean 6ft swell from the SSE. The energy is solid (565), and the cross-off wind in the afternoon keeps it tidy. It's a decent size, so it might be a bit much for beginners, but for intermediates, this is the pick of the week. Wednesday the 9th is even better – the morning is glassy with a 6ft SSW groundswell (period of 10 seconds), and the combined energy jumps to 1177. That's a strong, powerful swell. The direction is a little off the optimum for the river, which is SE, but with that kind of energy and glassy conditions, it's going to be a proper session. The afternoon stays clean with a light cross-off breeze.
After that, it drops off quickly. Thursday the 10th and Friday the 11th are surfable but very ordinary – small, weak waves in the 3ft to 4ft range with light cross-off winds. The energy is weak (107 to 216). Then from Saturday the 12th right through to the 21st of September, it's mostly poor surf conditions. The swell is tiny, mostly under 3ft, with very weak energy (down to 19 and 20 at times). There's a little spike on the 20th with a 5ft SW windswell, but it's a short period (6 seconds) and the wind is light cross-onshore, so it's going to be a bumpy, weak mess.
So, to sum it up: the best bet is to aim for the 8th and 9th of September. The river is a fairly consistent spot, so it tends not to stay poor for long, but this run is a long one. The water temp is about average for the time of year, nothing unusual.
Rusty.
Short Range ForecastHeavy rain (total 312mm), heaviest during Sun night. Warm (max 26°C on Mon morning, min 21°C on Sat night). Winds decreasing (fresh winds from the SSE on Mon morning, calm by Tue morning). | Days 5-7 Weather SummaryHeavy rain (total 45mm), heaviest during Wed morning. Warm (max 24°C on Wed morning, min 21°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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) | E 4 | ESE 7 | ESE 8 | ESE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSW 10 | SSW 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 21 | 56 | 146 | 554 | 933 | 1455 | 949 | 521 | 397 | 179 | 669 | 586 | 299 | 201 | 191 | 122 | 94 | 76 | 61 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy |
High Tide | 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 | 4:15AM1.53m | 5:05PM1.48m | ||||||||
Low Tide | 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 | 10:43AM0.24m | 10:57PM0.49m | |||||||
 |  |  |  |  | | | |  | | | | | | |  |  | | | |
 | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — |
 | 6:06 | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — |
mm | — | 2 | 18 | 133 | 60 | 16 | 73 | 2 | 8 | 11 | 9 | 5 | 15 | 2 | 1 | 1 | — | 1 | — |
Temp °C | 23 | 22 | 21 | 22 | 26 | 26 | 26 | 25 | 24 | 23 | 24 | 24 | 22 | 21 | 21 | 21 | 21 | 22 | 22 |
Feels °C | 24 | 20 | 20 | 23 | 27 | 28 | 30 | 31 | 26 | 26 | 29 | 28 | 23 | 22 | 22 | 22 | 23 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | ESE 7 | ESE 8 | S 9 | SE 11 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 |
| kJ | 14 | 56 | 146 | 106 | 5 | 1455 | 949 | 521 | 397 | 179 | 388 | 450 | 299 | 201 | 191 | 122 | 94 | 76 | 61 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SSW 8 | S 9 | S 11 | — | — | SE 9 | SE 10 | SE 10 | SSW 9 | SE 8 | ESE 10 | ESE 9 | ESE 11 | ESE 10 | ESE 10 | ESE 10 | SE 10 | ESE 10 |
| kJ | 7 | 7 | 6 | 41 | — | — | 424 | 27 | 27 | 92 | 110 | 10 | 8 | 11 | 19 | 10 | 9 | 14 | 10 |
Swell 3 Height (m) Direction Period (s) | E 9 | SE 12 | S 8 | NNW 5 | — | — | E 8 | SE 10 | SW 11 | ESE 12 | ESE 10 | E 16 | SE 11 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 |
| kJ | 6 | 6 | 1 | 5 | — | — | 91 | 17 | 33 | 13 | 10 | 5 | 5 | 4 | 4 | 16 | 16 | 16 | 14 |
Wind waves Height (m) Direction Period (s) | E 4 | NNE 4 | NNE 5 | ESE 8 | SSE 9 | — | — | — | — | NE 3 | SSW 10 | SSW 9 | NE 3 | NE 3 | NNE 3 | — | — | NE 2 | ENE 3 |
| kJ | 21 | 37 | 56 | 554 | 933 | — | — | — | — | 2 | 669 | 586 | 8 | 5 | 1 | — | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 433 | 450 | 450 | 515 | 191 | 191 | 9 | 0 | 0 | 0 | 0 | 0 | 66 | 0 | 0 | 0 | 0 | 0 | 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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