Surf Forecasts:
Sakawa River surf forecast from 14 Aug 2026:
- Best quality surf: Saturday 15 Aug, 12AM (local time) - 2ft (0.6m), 10s period, ESE swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 9AM (local time) - 4.5ft (1.3m), 10s period, E swell with 332 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 12AM (local time) - 2ft (0.6m), 10s period with ESE 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 (Aug 15) at 12AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 11s. Another secondary swell of 0.6m and 4s 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 1.3m 10s and forecast to arrive on Saturday (Aug 15) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 18) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 15th Aug) | 2ft (0.6m) 10s |
| Best Surf | 12AM (Sat 15th Aug) | 2ft (0.6m) 10s |
| Most Powerful | 9AM (Sat 15th Aug) | 4.5ft (1.3m) 10s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, let’s get into it. The next 16 days here on the Sakawa River are looking pretty bleak for the most part. We’ve got a long stretch of nothing special, but there’s a little window further out that might get us a bit excited.
Right now, from Friday the 14th, we’re looking at a lot of small, messy waves. The wind is mostly cross-onshore or cross, kicking up ripples and chop, and the swell energy is weak for the first week. The combined energy on Friday afternoon is only 124, which is sad. The water is sitting at 82°F, which is about average for this time of year, so nothing unusual there.
Saturday the 15th has a bit more size – 4ft from the east – but again, the wind is cross-onshore and the energy jumps to 558, yet the surf is still poor. Sunday the 16th is similar, with 4ft from the east, but the wind is cross-shore, and it’s only a marginal call. Honestly, the whole first week is a write-off. There’s a gap of several days where nothing is really worth paddling out for.
Now, the real standout is shaping up for Tuesday the 25th. That morning, the Sakawa River could be on. We’re looking at 5ft of swell from the southeast, with a long period of 13 seconds, and the wind is light and cross-offshore from the north. That’s clean. The combined energy is a solid 886, so there’s some proper push. This is a river break, so that long-period groundswell will line up nicely. It’s a fairly consistent spot, but it’s also a river, so it can be a bit fickle. Crowds are a possibility here, so get in early. This would be the best session on offer, but it’s over a week away, so keep an eye on the forecast.
Wednesday the 26th morning also has some size – 7ft from the southeast, with a 13-second period, and the energy is 1384. That’s strong. But the wind is cross-onshore, and at 7ft, this is getting into expert territory, especially for a river break. It’s a marginal call, and with that onshore wind, it might be a bit of a battle.
After that, the surf drops back down to small and ordinary through the end of the month. There’s a few days at the end with some clean conditions but tiny waves.
So, keep your eyes on Tuesday the 25th. That’s your best bet.
Rusty
Short Range ForecastModerate rain (total 18mm), heaviest on Fri night. Warm (max 28°C on Fri afternoon, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Thu morning. Warm (max 30°C on Tue morning, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 10 | ESE 10 | E 10 | ESE 9 | E 10 | E 10 | SE 9 | ESE 9 | ESE 9 | E 8 | E 7 | ESE 8 | ESE 8 | ESE 8 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 85 | 75 | 332 | 101 | 326 | 279 | 84 | 68 | 52 | 137 | 94 | 80 | 67 | 50 | 25 | 25 | 27 | 29 | 30 | 29 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-on | on | cross-on | cross | on | cross-off | cross | on | cross-off | cross | cross | cross-off | cross-off | cross | cross-off | cross | glassy | cross-off |
High Tide | 6:17PM1.48m | 5:45AM1.54m | 6:38PM1.48m | 6:30AM1.47m | 6:58PM1.47m | 7:14AM1.36m | 7:18PM1.46m | 8:00AM1.24m | 7:37PM1.44m | 8:53AM1.12m | 7:57PM1.41m | 10:11AM1.02m | 8:20PM1.36m | |||||||
Low Tide | 11:56PM0.62m | 12:15PM0.24m | 00:33AM0.52m | 12:43PM0.39m | 1:10AM0.46m | 1:08PM0.55m | 1:49AM0.43m | 1:29PM0.70m | 2:31AM0.45m | 1:44PM0.83m | 3:21AM0.48m | 1:46PM0.94m | ||||||||
 |  | |  |  | | | |  | |  | | | |  | | | | | | |
 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — |
 | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — |
mm | 4 | 8 | 2 | — | 3 | — | — | 1 | — | — | — | — | — | — | — | — | — | 2 | 3 | 3 |
Temp °C | 28 | 26 | 28 | 28 | 25 | 28 | 27 | 25 | 28 | 28 | 25 | 30 | 30 | 27 | 27 | 27 | 26 | 29 | 29 | 27 |
Feels °C | 31 | 30 | 30 | 29 | 28 | 29 | 29 | 28 | 29 | 31 | 28 | 31 | 31 | 29 | 30 | 30 | 30 | 33 | 34 | 32 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 8 | S 10 | SE 11 | ESE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SSE 7 | SSE 7 | SE 6 | SE 6 | SE 6 | SE 6 |
| kJ | 85 | 75 | 131 | 51 | 134 | 110 | 84 | 68 | 52 | 52 | 59 | 80 | 67 | 50 | 20 | 19 | 27 | 25 | 18 | 15 |
Swell 2 Height (m) Direction Period (s) | SSW 9 | S 11 | S 11 | SSE 8 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | ESE 8 | ESE 7 | SE 10 | SE 11 | SE 11 | SE 11 |
| kJ | 27 | 61 | 61 | 14 | 28 | 28 | 26 | 25 | 24 | 19 | 18 | 16 | 16 | 35 | 20 | 17 | 24 | 29 | 30 | 29 |
Swell 3 Height (m) Direction Period (s) | SSE 11 | SE 11 | SSE 9 | SSE 10 | ESE 9 | SE 12 | SE 11 | SE 11 | SE 11 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SE 7 | SE 10 | SE 10 | E 7 | E 9 | E 9 | ESE 8 |
| kJ | 12 | 29 | 34 | 10 | 28 | 21 | 31 | 43 | 19 | 14 | 13 | 6 | 6 | 14 | 25 | 25 | 4 | 6 | 6 | 14 |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | E 10 | ESE 9 | E 10 | E 10 | SE 8 | — | NE 3 | E 8 | E 7 | NE 3 | NNE 3 | NE 2 | NE 3 | ENE 3 | NNE 2 | NE 2 | ESE 6 | — |
| kJ | — | 12 | 332 | 101 | 326 | 279 | 46 | — | 2 | 137 | 94 | 2 | 2 | 1 | 4 | 1 | 1 | 1 | 24 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 58 | 0 | 27 | 40 | 27 | 22 | 58 | 0 | 73 | 27 | 0 | 111 | 111 | 66 | 73 | 66 | 50 | 50 | 58 | 58 |
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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