Surf Forecasts:
Sakawa River surf forecast from 9 Aug 2026:
- Best quality surf: Monday 10 Aug, 12AM (local time) - 2.5ft (0.8m), 12s period, ESE swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 9PM (local time) - 6ft (1.9m), 11s period, E swell with 843 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 12AM (local time) - 2.5ft (0.8m), 12s 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 Monday (Aug 10) at 12AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.6m and 10s. 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 1.9m 11s and forecast to arrive on Monday (Aug 10) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 15) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 10th Aug) | 2.5ft (0.8m) 12s |
| Best Surf | 12AM (Mon 10th Aug) | 2.5ft (0.8m) 12s |
| Most Powerful | 9PM (Mon 10th Aug) | 6ft (1.9m) 11s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at the Sakawa River.
Right off the bat, I gotta be straight with you: the Sakawa River is not offering much to get excited about for most of this 16-day window. It’s a pretty lean run, especially through the first week and a half. There are a few brief windows where things look *possible*, but you’ll need to be patient and pick your moments.
The real standout, and the one I’d circle on the calendar, is Saturday the 15th of August. That afternoon, we’ve got an ESE swell pushing 3ft with a solid 11-second period (moderate wave energy at 308). The wind is set to go light and cross-off from the NNW, which should leave the river mouth pretty clean. This is a river break, so it’s fairly consistent, and with the water temp at 81°F and about average for this time of year, it’ll be a pleasant session. Just keep in mind it can get crowded sometimes. For the Sakawa River, this is the day.
Before that, you’ve got a few smaller, glassy windows. Monday afternoon the 10th shows a glassy 3ft ESE swell at 12 seconds (284 energy), but it’s weak and only rated as marginal. Tuesday the 11th also has glassy conditions with a tiny SSW swell, but it’s barely worth paddling out for.
After the 15th, it goes quiet again with poor conditions and small, weak swell through the rest of the second week. There is a pulse of bigger swell building for the 22nd and 23rd of August with SSW groundswell around 4ft to 4ft and a long 13-second period. The energy jumps right up (601 to 648), but it comes with cross-shore winds and is flagged as marginal. However, late on Sunday the 23rd, the wind turns cross-off from the WSW with a clean 3ft SSW swell at 12 seconds (385 energy) – that could be a decent, less-crowded option for those who can wait.
Overall, it's a pretty quiet outlook for the Sakawa River. The 15th is your best bet by a long shot. Get on it if you can.
- Rusty
Short Range ForecastHeavy rain (total 20mm), heaviest during Wed morning. Warm (max 29°C on Sun afternoon, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Thu night. Warm (max 30°C on Thu morning, min 23°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 12 | ESE 12 | ESE 12 | ESE 11 | E 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | ESE 9 | E 11 | E 11 | E 10 | SE 10 | E 12 | ESE 11 | E 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 367 | 198 | 240 | 189 | 158 | 83 | 88 | 80 | 58 | 59 | 57 | 56 | 27 | 89 | 83 | 75 | 104 | 99 | 270 | 114 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | glassy | cross | glassy | glassy | cross-off | cross | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross |
High Tide | 4:05PM1.31m | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | 3:16AM1.49m | 5:30PM1.47m | 4:10AM1.55m | 5:55PM1.48m | 4:59AM1.57m | 6:17PM1.48m | 5:45AM1.54m | 6:38PM1.48m | |||||||
Low Tide | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | 10:28AM0.00m | 10:44PM0.87m | 11:08AM0.03m | 11:20PM0.74m | 11:43AM0.11m | 11:56PM0.62m | 12:15PM0.24m | 00:33AM0.52m | |||||||
 |  |  | | | | |  |  | | | | | | | |  |  | |  | |
 | — | — | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — |
 | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — |
mm | 1 | 2 | — | 2 | 1 | — | 4 | 5 | 5 | 2 | 1 | — | — | 9 | — | 1 | — | 4 | 1 | — |
Temp °C | 29 | 26 | 27 | 28 | 25 | 25 | 25 | 23 | 25 | 26 | 25 | 30 | 30 | 26 | 28 | 26 | 25 | 25 | 27 | 26 |
Feels °C | 32 | 30 | 30 | 32 | 27 | 27 | 28 | 27 | 27 | 29 | 27 | 30 | 30 | 27 | 28 | 28 | 27 | 28 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 12 | ESE 12 | ESE 12 | ESE 11 | E 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | ESE 9 | E 11 | E 11 | E 10 | SE 10 | SE 10 | ESE 11 | E 11 |
| kJ | 367 | 198 | 240 | 189 | 158 | 75 | 88 | 80 | 58 | 59 | 57 | 56 | 27 | 89 | 83 | 75 | 104 | 94 | 270 | 114 |
Swell 2 Height (m) Direction Period (s) | SSW 11 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | E 11 | E 11 | E 10 | E 10 | ESE 4 | ESE 9 | SSW 9 | SSW 9 | SSW 9 | SSE 11 | E 10 | E 12 | SSW 9 | SSW 10 |
| kJ | 117 | 74 | 88 | 91 | 80 | 83 | 61 | 37 | 18 | 16 | 3 | 15 | 27 | 28 | 28 | 68 | 94 | 99 | 15 | 31 |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 11 | SW 12 | SE 11 | SW 11 | SE 12 | SE 13 | SE 13 | SE 4 | SSE 12 | E 9 | SSE 12 | SSW 10 | SSE 12 | SSE 11 | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SE 12 |
| kJ | 6 | 20 | 21 | 4 | 5 | 25 | 27 | 26 | 3 | 15 | 15 | 14 | 10 | 13 | 25 | 17 | 29 | 28 | 23 | 35 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | N 3 | — | S 2 | — | ESE 4 | — | NNE 3 | E 3 | — | NE 3 | NE 3 | — | NE 3 | NE 4 | — |
| kJ | — | — | — | — | — | 1 | — | 1 | — | 10 | — | 8 | 1 | — | 2 | 3 | — | 5 | 7 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 27 | 0 | 22 | 0 | 66 | 0 | 0 | 0 | 27 | 0 | 31 | 66 | 66 | 66 | 96 | 0 | 0 | 0 | 0 | 58 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sakawa River surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest