Surf Forecasts:
Sakawa River surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 3AM (local time) - 2ft (0.6m), 9s period, ESE swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 12PM (local time) - 4.5ft (1.4m), 10s period, E swell with 384 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 3AM (local time) - 2ft (0.6m), 9s 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 Friday (Aug 14) at 3AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.4m and 9s. 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 1.4m 10s and forecast to arrive on Saturday (Aug 15) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 14) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 14th Aug) | 2ft (0.6m) 9s |
| Best Surf | 3AM (Fri 14th Aug) | 2ft (0.6m) 9s |
| Most Powerful | 12PM (Sat 15th Aug) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Right, mate, Rusty here. Let’s have a look at what Sakawa River has on offer for the next couple of weeks. I’ve gotta be straight with you – it’s a slow start. The first solid chance of a wave that’s worth paddling out for doesn’t show up until the morning of Sunday, the 23rd of August. Before then, we’re looking at a solid nine-day stretch of tiny, weak dribble or messy onshore junk. You’ll see a bump in combined swell energy around the 16th and 17th, hitting 412 (moderate energy), but it’s all cross-onshore and the wave comment is poor. Not worth your time. The water temp is sitting at a warm 81.1°F for the first break we look at, and with an anomaly of only 0.4°F, that’s pretty much normal for this time of year. Nothing to complain about there.
The real story starts on Sunday the 23rd. The morning session is where it’s at. We’ve got a clean 5.9ft swell coming from the SSE, with a long period of 16 seconds – that’s proper groundswell. The combined energy jumps to a whopping 1642 (strong wave energy). The wind is a light cross-offshore breeze from the NNE, which will keep the face clean. This is excellent for experienced surfers, and with a rating like that, it’s the standout of the whole window. The only thing is, it’s a river mouth, so a long-period swell like this can sometimes make things a bit straight, but the quality is there. The afternoon sees the same size but an onshore wind, which will mess it up.
Monday the 24th is still solid but not as clean. Morning has 6.2ft from the SSE (period 14 seconds) with a light cross-onshore breeze. It’s marginal. The energy is massive at 2714 (very strong), but the wind isn’t doing us any favours. It’s best left for the experts.
Tuesday the 25th morning is another potential cracker. Glassy conditions, 9.8ft of pure S swell with a 16-second period. The combined energy is through the roof at 4563. This is excellent for experienced surfers, but that size (over 8.2ft) means it’s strictly for the big-wave crew. Beginners, stay on the beach. The afternoon gets a cross-onshore wind, so grab that morning window.
Wednesday the 26th and Thursday the 27th are too big. The forecast is showing swells from 11.5ft up to a massive 24.6ft. The energy numbers are insane – 5745, 7995, and even 38081. The wind and tide are good, but the wave comment says it’s too big for this break. Not a paddle-surfing option. Maybe the kite crew will have a field day.
By Friday the 28th, it’s all dropping off again. The swell fades to 3.6ft, period drops to 8 seconds, and the wind goes cross-onshore. Back to the small stuff.
So, to wrap it up: if you’ve got the skills, the morning of Sunday the 23rd is your best bet for a clean, powerful wave. Tuesday the 25th morning is also a standout for the brave. Everything else is either too small, too messy, or too big. Keep an eye on the forecasts for the second week, as those big days are promising but a long way out. Stay frothing.
Short Range ForecastModerate rain (total 18mm), heaviest on Thu night. Warm (max 29°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 29°C on Tue afternoon, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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 9 | ESE 7 | ESE 6 | ESE 10 | ESE 8 | ESE 9 | ESE 8 | ESE 9 | E 9 | ESE 9 | ESE 11 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 6 | SE 8 | ESE 9 | SE 9 |
Wave Graph | |||||||||||||||||||
69 | 37 | 36 | 75 | 73 | 96 | 112 | 103 | 205 | 133 | 176 | 140 | 103 | 46 | 44 | 43 | 86 | 217 | 159 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross-off | cross | on | cross | cross | cross-on | cross | cross | on | cross-on | cross | on | cross | cross-on | on | glassy |
High Tide | 4:59AM1.57m | 6:17PM1.48m | 5:45AM1.54m | 6:38PM1.48m | 6:30AM1.47m | 6:58PM1.47m | 7:14AM1.36m | 7:18PM1.46m | 8:00AM1.24m | 7:37PM1.44m | 8:53AM1.12m | 7:57PM1.41m | |||||||
Low Tide | 11:20PM0.74m | 11:43AM0.11m | 11:56PM0.62m | 12:15PM0.24m | 00:33AM0.52m | 12:43PM0.39m | 1:10AM0.46m | 1:08PM0.55m | 1:49AM0.43m | 1:29PM0.70m | 2:31AM0.45m | 1:44PM0.83m | |||||||
— | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | |
6:35 | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | |
mm | 8 | 3 | 4 | 1 | — | 1 | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 28 | 28 | 25 | 28 | 29 | 25 | 28 | 29 | 25 | 28 | 28 | 25 | 28 | 29 | 26 | 28 | 28 | 25 |
Feels °C | 27 | 30 | 31 | 27 | 29 | 30 | 27 | 28 | 29 | 27 | 28 | 30 | 28 | 29 | 31 | 28 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 7 | ESE 6 | ESE 10 | ESE 8 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 10 | ESE 10 | ESE 9 | SE 10 | ESE 6 | SE 8 | SE 7 | SE 9 |
69 | 36 | 35 | 75 | 73 | 96 | 112 | 103 | 90 | 133 | 176 | 140 | 103 | 46 | 16 | 24 | 86 | 42 | 159 | |
Swell 2 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 11 | S 11 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SE 11 | SE 11 | SSW 8 | SE 10 | SE 10 | SE 10 | S 10 |
28 | 28 | 27 | 40 | 61 | 51 | 28 | 28 | 27 | 26 | 25 | 14 | 19 | 18 | 6 | 35 | 16 | 34 | 2 | |
Swell 3 Height (m) Direction Period (s) | S 12 | ESE 10 | ESE 10 | SE 11 | SSE 9 | SSE 8 | E 10 | SE 12 | SE 11 | SE 11 | SE 11 | SE 11 | SSW 8 | SSW 8 | — | E 8 | SSW 8 | SSW 8 | S 8 |
11 | 37 | 36 | 29 | 34 | 13 | 8 | 21 | 19 | 18 | 18 | 20 | 14 | 6 | — | 6 | 7 | 7 | 1 | |
Wind waves Height (m) Direction Period (s) | NE 2 | NE 3 | NNE 3 | — | NE 2 | — | — | NE 3 | E 9 | — | — | — | — | — | ESE 9 | ESE 6 | NE 3 | ESE 9 | — |
1 | 2 | 1 | — | 1 | — | — | 3 | 205 | — | — | — | — | — | 44 | 43 | 2 | 217 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 66 | 481 | 0 | 42 | 58 | 22 | 66 | 27 | 22 | 38 | 58 | 66 | 73 | 515 | 73 | 73 | 27 | 0 |
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.











