Surf Forecasts:
Sakawa River surf forecast from 2 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 9PM (local time) - 11ft (3.5m), 16s period, SE swell with cross-shore winds.
- Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 11ft (3.5m), 16s period, SE swell with 6,647 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 9PM (local time) - 11ft (3.5m), 16s 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 (Aug 04) at 9PM. The primary swell is predicted to be 3.5m and 16s period with a secondary swell of 0.8m and 4s. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Sakawa River in the next 16 days are 3.5m 16s and forecast to arrive on Wednesday (Aug 05) at 12PM. 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 Wednesday (Aug 05) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 4th Aug) | 11ft (3.5m) 16s |
| Best Surf | 9PM (Tue 4th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 12PM (Wed 5th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s talk about the Sakawa River in feet, because that’s how we measure it.
The water is about normal for this time of year, nothing unusual. This river mouth is exposed to that SE swell, so it can get some juice.
The next few days are a story of a big pulse that might be too much. We’ve got a long-period groundswell on the way. Monday, August 3rd, we’re looking at 5 to 6 ft of SE swell with a 16-second period. That’s a proper groundswell, and the wind is a clean cross-off from the NNE, so the waves will be clean. But the tide and conditions are a bit iffy. The real drama is Wednesday the 5th and Thursday the 6th, where the swell jumps to 11 to 12 ft. That’s a lot of water moving (7204 energy), and the river channel will be a beast. It’s only for the experts.
The big one is Wednesday morning, the 5th of August. The swell is a solid 11 to 12 ft from the SE, which is the perfect direction for this spot. The wind is a clean cross-off from the NNE, so the surface will be glassy. The wave energy is extremely strong (6229). It’s a river mouth, so that long period might make the waves a bit straight, but if you’re an expert, the paddle out could be easier between sets. The forecast says it’s too big, but for the few who can handle it, it’s the only real show in town.
After that, it drops off fast. By Friday the 7th, we’re down to 8 ft and smaller, and the wind gets ugly, turning cross-on. By the 10th, it’s barely 4 ft and the energy is weak (625). Then we hit a flat spell. From the 11th through the 18th, it’s a mess. The swell is under 3 ft, and the energy is below 200. There are a few glassy moments on the 13th and 14th, but the waves are too small to bother with. A blank run like this is pretty normal for this area in a lull.
So, your best bet is that Wednesday the 5th for the crazies, or just skip it until something changes.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 22°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Thu afternoon. Warm (max 30°C on Thu morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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) | SE 16 | ESE 16 | SE 17 | SE 17 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 16 | S 16 | S 15 | S 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | S 13 | ESE 12 | ESE 13 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1239 | 1904 | 2794 | 3813 | 4467 | 6029 | 6229 | 6095 | 4963 | 5655 | 5854 | 3640 | 2945 | 2127 | 1284 | 989 | 849 | 408 | 458 | 1075 | 135 |
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-off | cross-off | cross | cross-off | cross | on | cross | cross-off | cross-on | cross-off | cross-on | on | cross | cross | cross | cross-off |
High Tide | 7:41PM1.46m | 7:48AM1.28m | 8:05PM1.45m | 8:47AM1.18m | 8:33PM1.43m | 10:12AM1.09m | 9:05PM1.40m | 12:46PM1.07m | 9:50PM1.36m | 3:24PM1.19m | 11:07PM1.33m | 4:05PM1.31m | 00:49AM1.35m | ||||||||
Low Tide | 1:15PM0.41m | 1:55AM0.55m | 1:44PM0.55m | 2:41AM0.50m | 2:14PM0.72m | 3:38AM0.47m | 2:46PM0.88m | 4:53AM0.43m | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | ||||||||
 |  |  |  | |  | | | | |  |  | | | | | | | | | | |
 | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — |
 | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:39 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 2 | 2 | 4 | 1 | — | 1 | — | — | — |
Temp °C | 25 | 25 | 24 | 28 | 29 | 24 | 27 | 28 | 26 | 30 | 29 | 26 | 28 | 29 | 27 | 29 | 28 | 26 | 29 | 30 | 25 |
Feels °C | 26 | 25 | 23 | 26 | 27 | 23 | 26 | 28 | 27 | 31 | 32 | 29 | 31 | 32 | 31 | 32 | 30 | 30 | 27 | 28 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 16 | ESE 16 | SE 17 | SE 17 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 16 | S 16 | S 15 | S 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SE 9 | ESE 12 | ESE 12 | ESE 8 |
| kJ | 1239 | 1904 | 2794 | 3813 | 4467 | 6029 | 6229 | 6095 | 4963 | 5655 | 5854 | 3640 | 2945 | 2127 | 1284 | 989 | 849 | 328 | 458 | 433 | 125 |
Swell 2 Height (m) Direction Period (s) | S 13 | SE 20 | E 14 | E 14 | E 13 | — | — | — | — | ESE 10 | ESE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 9 | S 13 | S 11 | S 11 | SSW 11 |
| kJ | 3 | 396 | 34 | 59 | 31 | — | — | — | — | 281 | 80 | 609 | 496 | 414 | 351 | 402 | 351 | 408 | 209 | 146 | 135 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | E 16 | — | ENE 16 | E 15 | E 15 | — | E 14 | ESE 12 | SW 13 | SW 13 | SSW 13 | ESE 12 |
| kJ | — | — | — | — | — | — | — | — | — | 20 | — | 24 | 17 | 17 | — | 16 | 30 | 183 | 180 | 116 | 121 |
Wind waves Height (m) Direction Period (s) | NE 4 | — | ENE 4 | NE 4 | — | — | NNE 4 | NNE 5 | E 9 | NE 4 | ESE 10 | — | — | ESE 9 | ESE 9 | SE 9 | — | — | — | ESE 13 | NNE 4 |
| kJ | 13 | — | 24 | 28 | — | — | 29 | 39 | 355 | 46 | 555 | — | — | 755 | 486 | 657 | — | — | — | 1075 | 19 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 111 | 66 | 111 | 111 | 66 | 454 | 515 | 30 | 30 | 30 | 27 | 22 | 0 | 27 | 0 | 27 | 27 | 27 | 66 | 66 | 857 |
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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