Surf Forecasts:
Sakawa River surf forecast from 29 Aug 2026:
- Best quality surf: Monday 31 Aug, 9PM (local time) - 1.5ft (0.4m), 13s period, ESE swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 9PM (local time) - 2.5ft (0.8m), 11s period, S swell with 149 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 9PM (local time) - 1.5ft (0.4m), 13s 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 31) at 9PM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.3m and 9s. Another secondary swell of 0.2m and 6s 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 0.8m 11s and forecast to arrive on Thursday (Sep 03) at 9PM. 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 Saturday (Sep 05) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 31st Aug) | 1.5ft (0.4m) 13s |
| Best Surf | 9PM (Mon 31st Aug) | 1.5ft (0.4m) 13s |
| Most Powerful | 9PM (Thu 3rd Sep) | 2.5ft (0.8m) 11s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here, breaking down the Sakawa River stretch for the next couple of weeks. First thing: the water is sitting at about 82°, which is a degree warmer than usual for this time of year – feels like a hot tub.
The first few days, from Saturday the 29th through Monday the 31st of August, are a total dud. Tiny swell, messy wind, and just poor conditions. Don’t bother.
Tuesday the 1st of September shows a slight pulse. The morning goes glassy with a 2ft swell from the east, period at 12 seconds – that’s proper groundswell. The combined energy is moderate at 149. It’s clean, but the waves are still very ordinary. Ankle-high stuff for beginners.
A few more average days follow. Wednesday and Thursday offer small waves with cross-onshore winds. Thursday the 3rd has a glassy morning with 2ft from the south, but the period is short at 9 seconds, so not much push.
The first real standout pops up on Sunday the 7th of September. The afternoon brings a 5ft swell from the east-southeast, 10-second period, and strong combined energy of 501. The wind is cross-off from the north-northeast, keeping it clean. This is the first “good surf conditions” note. Waist-to-chest high, clean, and with some power.
The action continues into Monday the 8th with similar size, but the wind shifts more cross-shore, so Sunday is the better session.
Then we hit the best wave of the whole outlook on Wednesday the 10th of September. The morning is glassy with a 5ft swell from the east-southeast, period at 13 seconds, and combined energy pumping at 593. That’s a strong groundswell with dead calm wind. This is the one. A bit overhead for beginners, but for intermediates and up, it’s firing. The long period (13 seconds) means good shape and power, though at a river mouth it can run a bit straight along the sandbars.
After that, the swell drops off. The rest of the second week – Thursday the 11th through Sunday the 13th – is back to small, weak, or onshore conditions. There’s a glassy Saturday morning with 3ft from the southeast, but it’s ordinary.
The final standout is that same Wednesday the 10th morning. Crowds at Sakawa River are listed as “sometimes,” so on a good swell like that, expect a few heads out, but not a zoo.
Bottom line: The first week is a wash. Circle Sunday the 7th of September afternoon and especially Wednesday the 10th of September morning. That glassy groundswell Wednesday is the real deal.
Rusty, out.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat morning. Warm (max 27°C on Mon morning, min 22°C on Sat afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Warm (max 29°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 11 | SW 6 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 14 | ESE 13 | E 12 | ESE 12 | E 11 | E 10 | ESE 10 | SE 7 | S 9 | SE 7 | S 10 | S 10 | S 10 | S 10 |
Wave Graph | |||||||||||||||||||||
30 | 43 | 29 | 26 | 27 | 26 | 19 | 36 | 56 | 106 | 111 | 88 | 53 | 58 | 47 | 56 | 55 | 135 | 92 | 92 | 51 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross | cross-on | glassy | cross | cross | cross-off | glassy | cross-on | glassy | cross-on | cross-on | cross-off | glassy | cross-on | cross-off | cross | cross | cross |
High Tide | 5:45PM1.49m | 5:33AM1.50m | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | 6:56AM1.41m | 6:47PM1.51m | 7:44AM1.31m | 7:09PM1.49m | 8:44AM1.20m | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | ||||||||
Low Tide | 11:22AM0.24m | 11:38PM0.52m | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | 12:44PM0.57m | 1:22AM0.32m | 1:11PM0.72m | 2:06AM0.32m | 1:35PM0.87m | 3:03AM0.35m | 1:53PM1.01m | ||||||||
5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | |
— | 6:15 | — | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | 2 | 28 |
Temp °C | 24 | 24 | 22 | 24 | 26 | 24 | 27 | 27 | 25 | 27 | 28 | 26 | 29 | 29 | 26 | 29 | 28 | 27 | 26 | 24 | 21 |
Feels °C | 28 | 26 | 23 | 27 | 29 | 28 | 30 | 30 | 28 | 32 | 31 | 31 | 32 | 32 | 30 | 32 | 30 | 31 | 28 | 25 | 22 |
Swell 1 Height (m) Direction Period (s) | S 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SE 10 | SE 10 | SE 9 | ESE 13 | E 12 | ESE 12 | E 11 | E 10 | ESE 10 | SE 7 | SE 6 | SE 7 | S 10 | S 10 | S 10 | ESE 7 |
29 | 19 | 18 | 11 | 11 | 26 | 15 | 14 | 56 | 106 | 111 | 88 | 53 | 58 | 47 | 40 | 55 | 135 | 92 | 92 | 44 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | SSW 7 | SSW 7 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | S 8 | S 9 | S 9 | SSW 12 | SE 7 | SE 7 | SE 7 | S 10 |
30 | 31 | 29 | 26 | 27 | 11 | 11 | 11 | 15 | 25 | 26 | 26 | 24 | 37 | 39 | 56 | 30 | 65 | 49 | 41 | 51 | |
Swell 3 Height (m) Direction Period (s) | ESE 8 | ESE 9 | SE 10 | E 10 | ESE 9 | E 10 | ESE 14 | ESE 14 | SE 9 | SSE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 9 | ESE 10 | ESE 9 | E 10 | SE 9 | SE 9 | E 10 |
7 | 9 | 4 | 2 | 9 | 2 | 19 | 36 | 14 | 10 | 16 | 16 | 17 | 17 | 9 | 19 | 17 | 17 | 13 | 12 | 8 | |
Wind waves Height (m) Direction Period (s) | — | SW 6 | NE 4 | NE 3 | E 6 | — | NE 2 | ENE 6 | — | ENE 6 | — | — | — | — | — | — | S 8 | — | ENE 3 | NE 4 | ENE 4 |
— | 43 | 6 | 1 | 1 | — | 1 | 6 | — | 8 | — | — | — | — | — | — | 52 | — | 3 | 29 | 37 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 50 | 68 | 96 | 82 | 89 | 89 | 82 | 82 | 0 | 0 | 53 | 0 | 58 | 58 | 0 | 0 | 68 | 0 | 66 | 66 | 66 |
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)
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.











