Surf Forecasts:
Sakawa River surf forecast from 3 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9AM (local time) - 11ft (3.5m), 10s period, S swell with cross-onshore winds.
- Most powerful swell: Tuesday 8 Sep, 3AM (local time) - 11ft (3.5m), 10s period, S swell with 2,498 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 6AM (local time) - 2ft (0.6m), 10s period with S 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 Friday (Sep 04) at 6AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.6m and 6s. 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 3.5m 10s and forecast to arrive on Tuesday (Sep 08) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Sep 06) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 4th Sep) | 2ft (0.6m) 10s |
| Best Surf | 9AM (Tue 8th Sep) | 11ft (3.5m) 10s |
| Most Powerful | 3AM (Tue 8th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, this is Rusty.
We’ve got a 16-day window for the Sakawa River, and let me tell you, it’s a bit of a mixed bag. The first few days are pretty flat and quiet, so don’t rush down. Things start to wake up around Friday the 4th, but it’s still nothing to write home about. The real action, and I mean the only standout in this whole run, is going to hit us on Tuesday the 8th. That morning, a solid 12ft south swell is predicted, with a period of 10 seconds. The combined swell energy is a massive 3810 (strong to very strong), meaning it’s packing some real punch. However, that’s huge for this spot—over 8ft, so it’s strictly for experts only. The wind is a cross-onshore from the SSW at 12 mph, so it’s going to be a bit choppy, but the power is undeniable. The afternoon drops to 10ft, still huge.
Before that, Friday the 4th morning looks like the only other decent window. We’ve got a 2ft south swell (136 moderate energy) with a 10-second period, and the wind is glassy. That’s clean, small conditions, perfect for the intermediate crew. The water temp is 81°, which is about average for this time of year.
Keep in mind, the Sakawa River is a river mouth (Sakawa-River zone), so it’s a sand and current setup. The optimum swell direction here is SE, so that Tuesday south swell is a bit off, but that much water moving will still produce. For the rest of the run, it’s mostly small, weak swells with cross or onshore winds, and a lot of "poor surf conditions" in the notes. There’s a long gap of nothing worthwhile from the 9th all the way through the 18th.
So, the only real standout is Tuesday the 8th. If you’re a seasoned charger and don’t mind average winds with a giant swell, that’s your day. Otherwise, this is a quiet period.
Rusty
Short Range ForecastHeavy rain (total 60mm), heaviest during Fri night. Warm (max 30°C on Thu morning, min 21°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 249mm), heaviest during Mon night. Warm (max 27°C on Tue morning, min 20°C on Sun morning). Winds decreasing (fresh winds from the N on Sun morning, calm by Mon afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 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) | ESE 10 | S 8 | S 11 | S 10 | S 10 | SSW 9 | S 9 | SSW 9 | ENE 4 | NE 5 | ESE 8 | ESE 9 | SE 8 | SE 8 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 37 | 36 | 85 | 96 | 68 | 68 | 42 | 25 | 45 | 75 | 100 | 176 | 295 | 264 | 1802 | 2153 | 1928 | 1299 | 1055 | 1490 | 792 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-on | cross | cross |
High Tide | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | 8:45PM1.32m | 3:36PM1.25m | 10:48PM1.25m | 3:45PM1.33m | 1:09AM1.28m | 4:04PM1.39m | 2:29AM1.38m | 4:25PM1.43m | ||||||||||
Low Tide | 1:35PM0.87m | 3:03AM0.35m | 1:53PM1.01m | 4:23AM0.38m | 6:11AM0.37m | 7:15PM1.21m | 7:42AM0.29m | 8:41PM1.09m | 8:43AM0.22m | 9:20PM0.95m | 9:30AM0.17m | 9:53PM0.79m | |||||||||
 |  |  |  | |  | | | |  | | |  | | | | |  | | |  | |
 | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — |
 | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | 1 | 1 | 1 | 3 | 44 | 4 | 3 | 3 | 8 | 7 | 26 | 23 | 42 | 116 | 9 | 8 | 10 | 12 | 18 | 6 |
Temp °C | 30 | 30 | 25 | 25 | 25 | 22 | 21 | 21 | 21 | 21 | 21 | 22 | 23 | 23 | 26 | 27 | 27 | 26 | 27 | 27 | 27 |
Feels °C | 32 | 33 | 28 | 29 | 28 | 25 | 21 | 20 | 19 | 18 | 18 | 20 | 23 | 26 | 27 | 30 | 31 | 30 | 32 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 11 | S 10 | S 10 | SSW 9 | S 9 | SSW 9 | SSW 8 | ESE 8 | ESE 8 | ESE 9 | SE 8 | SE 8 | E 9 | SSE 10 | SSE 10 | S 10 | SE 12 | S 10 | S 9 |
| kJ | 37 | 36 | 85 | 96 | 68 | 68 | 42 | 25 | 22 | 43 | 100 | 176 | 295 | 264 | 56 | 1633 | 1176 | 1069 | 6 | 1146 | 792 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | SE 6 | SE 6 | SE 7 | SE 6 | SE 7 | SE 6 | SE 8 | ESE 6 | S 9 | SSE 8 | SSW 9 | SSW 9 | — | E 9 | E 8 | SE 12 | E 17 | E 16 | SE 12 |
| kJ | 31 | 18 | 8 | 19 | 15 | 11 | 22 | 9 | 3 | 13 | 6 | 37 | 8 | 15 | — | 24 | 12 | 6 | 6 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | E 9 | SE 8 | SE 12 | SSW 9 | SW 11 | S 9 | SSW 9 | SW 9 | — | — | E 19 | E 18 | SE 12 | — | E 16 |
| kJ | 15 | 15 | 15 | 13 | 13 | 12 | 6 | 11 | 6 | 8 | 4 | 1 | 8 | 13 | — | — | 7 | 6 | 6 | — | 5 |
Wind waves Height (m) Direction Period (s) | — | S 3 | ENE 3 | ENE 5 | — | E 6 | ENE 3 | ENE 4 | ENE 4 | NE 5 | NE 5 | NNE 5 | NNE 4 | NNE 4 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 9 |
| kJ | — | 5 | 5 | 8 | — | 28 | 3 | 16 | 45 | 75 | 78 | 80 | 19 | 8 | 1802 | 2153 | 1928 | 1299 | 1055 | 1490 | 766 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 191 | 24 | 0 | 0 | 0 | 66 | 191 | 191 | 450 | 433 | 450 | 191 | 0 | 451 | 451 | 451 | 515 | 451 | 451 | 100 |
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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