Surf Forecasts:
Sakawa River surf forecast from 10 Sep 2026:
- Best quality surf: Thursday 10 Sep, 9PM (local time) - 2.5ft (0.7m), 8s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 9PM (local time) - 3.5ft (1.0m), 9s period, SE swell with 163 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 9PM (local time) - 2.5ft (0.7m), 8s 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 Thursday (Sep 10) at 9PM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 10s. Another secondary swell of 0.4m 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 1.0m 9s and forecast to arrive on Monday (Sep 14) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 17) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 10th Sep) | 2.5ft (0.7m) 8s |
| Best Surf | 9PM (Thu 10th Sep) | 2.5ft (0.7m) 8s |
| Most Powerful | 9PM (Mon 14th Sep) | 3.5ft (1.0m) 9s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let's chew the fat on what the next couple of weeks look like.
So, for the Sakawa River, it's gonna be a slow burn for a while. The first handful of days are tiny and messy – nothing over 3 ft, and it's all short-period junk pushed around by the wind. Thursday the 10th and Friday the 11th are a total washout. Saturday and Sunday? Still barely a ripple. We're talking a real quiet spell until things start to kick off mid-month. The water is sitting at 81°, which is a smidge warmer than normal for this time of year, a nice little treat.
Now, Tuesday the 15th morning finally gives us a window. The wind goes dead calm – glassy – and we get a clean 3 ft swell from the SE. It's not epic, but it's surfable, and that glassy surface is hard to beat for the river.
The main event, and I mean the one to circle on the calendar, is Saturday the 19th and Sunday the 20th of September. A proper pulse of energy rolls in. On Saturday morning, we're looking at 10 ft from the SE with a period of 16 seconds – that's a long-period groundswell. The energy is huge. The wind is a clean cross-off from the north-northeast at 16 mph. Sunday morning the 20th is even bigger – 12 ft from the south-southeast. The wind drops to a light 6 mph cross-off, which would make it look pristine. But here's the thing: at 12 ft to 16 ft, the river mouth is going to be a full-on, dangerous closeout. The charts even say it's too big for this break. That's serious, heavy-duty water for experts only.
For a session you can actually paddle into without needing a rescue, aim for Monday the 21st. The swell drops to a more manageable 8 ft from the south-southeast, with the energy still kicking. The wind is a light 6 mph cross-off from the north-northeast, keeping it glassy. The period drops to a punchy 11 seconds. This is your best bet for a clean, solid session, as long as you've got the experience for the size.
After that, it drops off fast. Tuesday the 22nd is back to small stuff, and then it fades into nothing by the 25th.
So, bottom line: be patient. The standout is Monday the 21st for a solid, clean, but sizeable session. Saturday and Sunday the 19th and 20th are for the gun-slingers or just sitting on the bank. That small, glassy window on the 15th is a nice little bonus for the longboarders.
Rusty.
Short Range ForecastHeavy rain (total 36mm), heaviest during Fri morning. Warm (max 25°C on Sun morning, min 19°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Mon morning, min 23°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 8 | S 8 | S 8 | S 8 | SE 10 | SE 10 | ESE 14 | ESE 13 | ESE 13 | ESE 13 | SE 8 | SE 9 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 84 | 61 | 42 | 40 | 28 | 24 | 37 | 69 | 56 | 55 | 61 | 79 | 127 | 156 | 104 | 80 | 84 | 60 | 68 | 54 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-on | cross-on | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross-off |
High Tide | 4:45PM1.46m | 4:15AM1.53m | 5:05PM1.48m | 4:59AM1.54m | 5:24PM1.50m | 5:40AM1.52m | 5:42PM1.51m | 6:20AM1.46m | 6:01PM1.51m | 6:59AM1.37m | 6:20PM1.49m | 7:40AM1.27m | 6:39PM1.46m | |||||||
Low Tide | 10:25PM0.63m | 10:43AM0.24m | 10:57PM0.49m | 11:14AM0.34m | 11:29PM0.37m | 11:42AM0.46m | 00:01AM0.29m | 12:07PM0.58m | 00:34AM0.27m | 12:29PM0.71m | 1:07AM0.28m | 12:48PM0.81m | 1:43AM0.34m | |||||||
 |  |  |  |  | |  |  |  |  |  | | |  | | | | | | | |
 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — |
 | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — |
mm | 1 | 9 | 17 | 6 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 19 | 19 | 20 | 20 | 20 | 21 | 22 | 25 | 26 | 24 | 28 | 28 | 25 | 28 | 26 | 25 | 24 | 24 | 23 |
Feels °C | 21 | 19 | 21 | 21 | 22 | 21 | 23 | 24 | 29 | 30 | 28 | 31 | 30 | 28 | 31 | 28 | 29 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 8 | S 8 | SSW 7 | SE 10 | ESE 13 | ESE 13 | SE 8 | SE 8 | SE 9 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 |
| kJ | 84 | 61 | 42 | 40 | 28 | 18 | 23 | 69 | 56 | 37 | 61 | 79 | 127 | 156 | 104 | 80 | 84 | 60 | 68 | 54 |
Swell 2 Height (m) Direction Period (s) | SE 9 | ESE 4 | ESE 10 | SE 10 | SE 10 | SE 10 | SSW 7 | SSW 7 | SE 9 | ESE 13 | ESE 12 | E 12 | E 12 | E 12 | E 13 | E 13 | E 12 | SE 9 | E 13 | E 12 |
| kJ | 14 | 3 | 9 | 14 | 25 | 24 | 18 | 9 | 28 | 55 | 29 | 11 | 11 | 12 | 13 | 12 | 3 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | E 15 | ESE 10 | ESE 5 | E 14 | E 14 | E 14 | ESE 14 | — | SSW 7 | SSW 7 | S 7 | S 7 | E 15 | S 7 | E 16 | E 12 | E 14 | E 13 | E 11 | S 8 |
| kJ | 17 | 9 | 3 | 16 | 14 | 15 | 37 | — | 5 | 5 | 1 | 1 | 4 | 1 | 5 | 3 | 4 | 3 | 2 | 1 |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 3 | NE 3 | NE 3 | NE 3 | NE 3 | NE 3 | NE 3 | NNE 2 | — | — | — | S 2 | — | — | S 3 | — | — | S 2 | — |
| kJ | 11 | 4 | 1 | 2 | 1 | 3 | 2 | 2 | 1 | — | — | — | 1 | — | — | 5 | — | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 38 | 73 | 110 | 73 | 73 | 73 | 73 | 73 | 50 | 0 | 53 | 68 | 0 | 0 | 0 | 0 | 73 | 73 | 73 |
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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