
Surf Forecasts:
Sakawa River surf forecast from 13 Sep 2026:
- Best quality surf: Saturday 19 Sep, 6PM (local time) - 8ft (2.4m), 12s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 3AM (local time) - 8ft (2.4m), 14s period, SE swell with 2,383 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 12AM (local time) - 2.5ft (0.8m), 9s 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 Tuesday (Sep 15) at 12AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.2m and 13s. 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 2.4m 14s and forecast to arrive on Saturday (Sep 19) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Friday (Sep 18) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 15th Sep) | 2.5ft (0.8m) 9s |
| Best Surf | 6PM (Sat 19th Sep) | 8ft (2.4m) 12s |
| Most Powerful | 3AM (Sat 19th Sep) | 8ft (2.4m) 14s |
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 the Sakawa River has in store for us over the next couple of weeks. To be straight with you, the start of this period is a bit of a dud. We've got a lot of days with minimal, weak swell and messy winds, so don't expect much until we get deeper into the forecast.
Looking at the overall pattern, there’s a real standout on the horizon. The best bet by a long shot is shaping up for Saturday, September 21st, on the morning session. We're looking at a clean 4ft swell pushing in from the SSW with an 11-second period. The wind is forecast to be glassy – absolutely dead calm – which is a massive positive. This will result in clean, smooth waves at the river mouth. The combined energy is moderate (479), suggesting there's some real push behind it. For a river break, that long-period groundswell should wrap in nicely, offering better shaped waves with longer gaps between sets, making the paddle out a bit easier. Water temps are around 81°, which is about average for this time of year, so you won't need the thick rubber.
Now, the other day that has some potential is Tuesday, September 22nd, but with a serious caveat. The morning is looking glassy again with a 5ft S swell, but a short period of 7 seconds, so it’ll be a bit fat and less powerful. The real issue is the afternoon: the swell is forecast to jump to a massive 12ft from the south with a combined energy of 1679. That's strong. While the wind is light, that size is simply too big for this break and is really only for experts, if anyone at all. The data suggests it'll be too big for this spot, so I'd be very cautious.
Aside from those two windows, the rest of the two weeks looks pretty bleak. From now until the 19th, we've got tiny swells, mostly under 3ft, with weak energy (values under 112) and poor wind directions keeping the surface messy. There's a brief window on the afternoon of Friday, September 19th where the swell bumps up to 8ft from the SE with a strong 2180 energy reading, but the wind is cross-off and moderate. It's a big, powerful swell, but the quality is marginal at best for this spot.
After the 22nd, it drops right off again. From the 23rd through to the 27th, we're looking at a mix of onshore winds and tiny, weak swell, so you can pretty much write that week off for any decent waves. The very last day, Monday, September 28th, shows some promise with a clean 5ft SE groundswell (13 secs) and light offshore winds from the west. The combined energy is a solid 870, which is moderate to strong. That could be a nice end to the run, but it's a long way out.
So to sum it up: don't bother paddling out until next weekend. Your window is Saturday morning, September 21st for the cleanest, most user-friendly waves of the forecast. That's your standout. If you're an expert and feel like a challenge, you could look at the 22nd, but be aware of the size. Otherwise, it's a waiting game.
Stay stoked,
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Tue afternoon. Warm (max 28°C on Mon morning, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed morning. Warm (max 23°C on Wed morning, min 21°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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) | ESE 13 | ESE 13 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 20 | SE 17 | SE 15 | SE 13 | SE 12 | SE 11 |
Wave Graph | |||||||||||||||||||||
56 | 55 | 39 | 44 | 76 | 122 | 91 | 84 | 77 | 57 | 57 | 54 | 31 | 28 | 14 | 140 | 861 | 2341 | 2180 | 1632 | 1053 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross | cross | cross-off | cross | cross | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:42PM1.51m | 6:20AM1.46m | 6:01PM1.51m | 6:59AM1.37m | 6:20PM1.49m | 7:40AM1.27m | 6:39PM1.46m | 8:27AM1.16m | 6:58PM1.41m | 9:36AM1.06m | 7:17PM1.35m | 7:36PM1.27m | |||||||||
Low Tide | 11:42AM0.46m | 00:01AM0.29m | 12:07PM0.58m | 00:34AM0.27m | 12:29PM0.71m | 1:07AM0.28m | 12:48PM0.81m | 1:43AM0.34m | 1:01PM0.91m | 2:27AM0.42m | 1:02PM0.99m | 3:27AM0.51m | |||||||||
5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | |
— | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | — | 5:46 | — | — | 5:45 | — | |
mm | — | — | — | — | — | 2 | 1 | 2 | 3 | 4 | 2 | — | — | — | — | — | — | — | — | 1 | 14 |
Temp °C | 25 | 25 | 24 | 28 | 28 | 25 | 26 | 26 | 25 | 23 | 23 | 22 | 22 | 22 | 21 | 22 | 22 | 22 | 25 | 26 | 23 |
Feels °C | 28 | 28 | 27 | 29 | 30 | 27 | 28 | 29 | 28 | 26 | 25 | 23 | 23 | 22 | 20 | 20 | 20 | 21 | 25 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 20 | SE 17 | SE 15 | SE 13 | SE 12 | SE 11 |
56 | 39 | 39 | 44 | 76 | 122 | 91 | 84 | 77 | 57 | 57 | 54 | 31 | 28 | 9 | 140 | 861 | 2341 | 2180 | 1632 | 1053 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | ESE 13 | ESE 12 | E 12 | E 12 | E 13 | E 13 | E 13 | S 6 | S 6 | S 6 | E 12 | E 12 | S 9 | ESE 8 | SE 8 | SE 8 | ESE 9 | — | S 9 | S 15 |
21 | 55 | 29 | 25 | 11 | 12 | 13 | 12 | 6 | 6 | 2 | 3 | 3 | 2 | 14 | 16 | 30 | 111 | — | 2 | 17 | |
Swell 3 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SW 7 | S 7 | E 15 | S 7 | E 16 | E 14 | E 12 | E 13 | E 13 | S 5 | E 12 | E 12 | SE 9 | SE 9 | E 11 | — | — | — | — |
5 | 5 | 2 | 1 | 4 | 1 | 5 | 16 | 3 | 3 | 3 | 1 | 3 | 3 | 3 | 3 | 2 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NE 3 | — | — | — | S 3 | WSW 3 | — | — | — | — | — | NE 3 | NE 3 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NE 4 | — |
2 | — | — | — | 8 | 3 | — | — | — | — | — | 3 | 5 | 11 | 32 | 46 | 46 | 39 | 35 | 7 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 58 | 67 | 68 | 481 | 0 | 67 | 67 | 66 | 73 | 73 | 89 | 451 | 191 | 191 | 191 | 111 | 433 | 433 | 30 | 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.










