
Surf Forecasts:
Sakawa River surf forecast from 28 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 6PM (local time) - 11ft (3.5m), 18s period, SE swell with cross-shore winds.
- Most powerful swell: Wednesday 5 Aug, 3AM (local time) - 13ft (4.0m), 17s period, SE swell with 9,607 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 3AM (local time) - 4ft (1.2m), 6s period with SW 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 Wednesday (Jul 29) at 3AM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 0.7m and 6s. Another secondary swell of 0.4m and 10s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sakawa River in the next 16 days are 4.0m 17s and forecast to arrive on Wednesday (Aug 05) 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 Wednesday (Aug 05) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 29th Jul) | 4ft (1.2m) 6s |
| Best Surf | 6PM (Tue 4th Aug) | 11ft (3.5m) 18s |
| Most Powerful | 3AM (Wed 5th Aug) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on offer for the Sakawa River.
Right off the bat, we’re looking at a pretty flat opening stretch. The first few days are small and weak, nothing to get excited about. Wednesday the 29th, we’ve got a weak 4ft SW swell but it’s short period and the wind is glassy in the morning, so you could get a few grovelly ones. The energy is weak at 224. Thursday and Friday drop off to tiny, poor surf. Then Saturday and Sunday the 1st and 2nd of August are barely showing anything, with very small swell and mixed wind.
Then we start to see some life. Monday the 3rd of August, the swell picks up to 6ft from the ESE, but the period is a very long 16 seconds. That’s a groundswell, and at a river mouth like this, that long period can make the waves break a bit straight and dumpy. The wind is cross-shore, not ideal. The energy is building, moderate at 1483 on the Monday morning, but the conditions are marginal. Tuesday the 4th pushes even bigger, with 8ft to 10ft SE swell, again with a very long 17-second period. That’s getting into the too-big-for-beginners range, and the cross-shore wind is picking up, making it lumpy. The energy is strong now, hitting 4508 and 5594.
Now, here’s where it gets interesting for the experienced crew. Wednesday the 5th of August, the swell really cranks up to 15ft from the SE, with a very long 18-second period. The wind is cross-offshore in the morning, which is a major positive, giving clean, groomed faces. The energy is very strong at 13091. But honestly, for this river break, that’s too much swell. It’s expert-only territory. The same goes for Thursday the 6th, with 18ft SSE swell and glassy offshore wind in the morning – it’s clean, but it’s a beast. Friday the 7th is still pumping at 12ft, glassy, but again, massive.
After that, the swell slowly drops through the weekend of the 8th and 9th, but the wind turns onshore and choppy, so it’s not a great window. By Monday the 10th, we’re back to small, poor conditions, and the rest of the outlook through to the 13th is flat and weak.
The standout window is the morning of Wednesday the 5th of August. The wind is cross-offshore and clean, the swell is huge, but it’s only for experts. For anyone else, the best of a bad bunch might be the glassy Wednesday morning of the 29th of July, but it’s small.
Water temp is about average for the time of year. No major anomaly to report.
Alright, keep your eyes on that big swell early August, but respect the river. It’s going to be a serious paddle.
- Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Fri afternoon. Warm (max 30°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Fri night. Warm (max 30°C on Mon afternoon, min 24°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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) | SW 5 | SW 6 | SW 7 | SSW 7 | SE 10 | SE 10 | S 7 | S 7 | SSW 7 | ESE 9 | ESE 15 | ESE 15 | ESE 16 | SE 15 | SE 14 | ESE 15 | ESE 16 | SE 17 | SE 17 |
Wave Graph | |||||||||||||||||||
61 | 128 | 125 | 38 | 23 | 23 | 26 | 23 | 15 | 8 | 22 | 42 | 103 | 326 | 476 | 770 | 1479 | 2187 | 3146 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | cross-on | cross-off | glassy | cross-on | cross-off | glassy | glassy | cross-on | cross-on | glassy | glassy | cross-on | cross-on | cross-on | cross | cross-on | cross |
High Tide | 3:40AM1.42m | 5:51PM1.39m | 4:21AM1.46m | 6:13PM1.42m | 5:00AM1.48m | 6:35PM1.44m | 5:38AM1.47m | 6:56PM1.46m | 6:18AM1.43m | 7:18PM1.46m | 7:00AM1.37m | 7:41PM1.46m | |||||||
Low Tide | 10:26PM0.97m | 10:50AM0.14m | 10:59PM0.90m | 11:21AM0.13m | 11:31PM0.83m | 11:50AM0.15m | 00:04AM0.75m | 12:19PM0.20m | 00:38AM0.68m | 12:47PM0.29m | 1:15AM0.61m | 1:15PM0.41m | 1:55AM0.55m | ||||||
— | 4:48 | — | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | |
6:50 | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | 1 | — | 5 | 4 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 30 | 30 | 29 | 29 | 29 | 28 | 30 | 28 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 28 | 30 | 25 |
Feels °C | 31 | 33 | 33 | 32 | 32 | 33 | 33 | 33 | 32 | 31 | 30 | 30 | 31 | 30 | 30 | 31 | 30 | 32 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 5 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 7 | S 7 | SSW 7 | SSW 7 | S 7 | ESE 15 | ESE 16 | SE 15 | SE 14 | ESE 15 | ESE 16 | SE 17 | SE 17 |
12 | 45 | 41 | 38 | 18 | 10 | 26 | 23 | 15 | 4 | 4 | 42 | 103 | 326 | 476 | 770 | 1479 | 2187 | 3146 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | ESE 9 | SE 9 | SE 9 | SE 8 | SE 9 | SSE 9 | SSE 9 | S 13 | E 15 | E 14 |
35 | 34 | 34 | 23 | 23 | 23 | 14 | 14 | 14 | 8 | 12 | 12 | 18 | 3 | 8 | 8 | 3 | 4 | 59 | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | ESE 13 | SE 13 | SE 14 | SE 12 | SE 12 | ESE 12 | SE 13 | SE 13 | SE 11 | ESE 15 | S 7 | SE 11 | SW 5 | — | — | S 8 | — | — |
14 | 17 | 7 | 8 | 6 | 6 | 14 | 6 | 7 | 5 | 22 | 4 | 4 | 1 | — | — | 1 | — | — | |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 6 | SW 7 | NNE 2 | — | — | — | — | — | ESE 3 | ESE 3 | SE 2 | SE 4 | — | ESE 4 | — | — | E 5 | E 6 |
61 | 128 | 125 | 1 | — | — | — | — | — | 1 | 1 | 1 | 5 | — | 7 | — | — | 20 | 50 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 89 | 50 | 50 | 50 | 58 | 50 | 110 | 159 | 96 | 58 | 0 | 27 | 27 | 27 | 22 | 27 | 27 |
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.










