
Surf Forecasts:
Sakawa River surf forecast from 1 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 6PM (local time) - 11ft (3.5m), 16s period, SE swell with cross-onshore winds.
- Most powerful swell: Wednesday 5 Aug, 3PM (local time) - 11ft (3.5m), 16s period, SSE swell with 5,894 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 2ft (0.6m), 16s 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 Saturday (Aug 01) at 9PM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 0.4m and 6s. Another secondary swell of 0.7m and 6s 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 3.5m 16s and forecast to arrive on Wednesday (Aug 05) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Aug 05) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 1st Aug) | 2ft (0.6m) 16s |
| Best Surf | 6PM (Tue 4th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 3PM (Wed 5th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get straight into it for the local scene.
The outlook is a bit of a slow burner. We've got a solid run of small, weak surf kicking things off, but there's a real pulse of energy coming through mid-period that's got my attention. The water temperature is sitting at 82°, which is about a degree and a half warmer than usual for this time of year, so you can leave the steamer at home.
We start with a bit of a dud. Saturday the 1st and Sunday the 2nd are pretty much a write-off. The Sakawa River is showing tiny waves around 0.7ft to 4ft, with a light cross-onshore breeze making things messy. The combined energy is a measly 47 to 539, just weak stuff. Not worth paddling out for.
There's a glimmer on Monday the 3rd afternoon. The swell picks up to 6ft from the ESE, with a period of 16 seconds. That's a proper long-period groundswell, and the wind turns cross-offshore, cleaning the wave faces up nicely. The combined energy jumps to 1927, a moderate bump. It's a bit of a marginal call, but the right setup could see some fun runners.
Tuesday the 4th morning is the standout of the entire outlook. The swell is 8ft from the SE with that same 16-second period, giving us a combined energy of 3909. The wind is a clean cross-off from the NNE. This is prime for the river mouth. The waves will have great shape and power, but with that size, it's definitely for the crew who knows what they're doing. It will be too big for beginners. There's a chance of crowds, so get there early.
After that, it gets big and tricky. From Wednesday the 5th through to Thursday the 6th, the swell hits 12ft, with combined energy readings over 5800. That's a serious amount of water moving. The wind is mixed, and the forecast is clear that the swell is predicted to be too big for this break. Unless you're an expert on a big-wave gun, give it a miss. The setup might actually be more interesting for kite surfing than paddle surfing during this period.
We then see a slow drop-off through the rest of the first week and into the second. Friday the 7th morning has 8ft swell from the S, but the wind is cross-onshore, chopping it up. The following days are a mix of small, weak swells with periods dropping below 13 seconds, and mostly onshore or cross-shore winds. The energy levels drop back into the hundreds. It's a blank stretch, with the next slightly promising window not appearing until Monday the 10th morning. That morning has a clean 3ft swell from the ESE with a cross-offshore breeze, but it's small and weak (energy 507). Not really a highlight.
From the 11th of August onwards, it's all poor surf conditions with tiny waves and weak, short-period energy. The combined energy drops into the 100s and low 200s. Don't expect much.
So, to wrap it up: the best bet by a long shot is Tuesday the 4th of August morning. Get on it for some powerful, clean, long-period groundswell at the Sakawa River. After that, the window slams shut.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 31°C on Sat afternoon, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 30°C on Thu morning, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | ||||||||||||||
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 15 | ESE 17 | ESE 16 | SE 15 | ESE 15 | SE 16 | ESE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | S 15 | S 15 | S 14 |
Wave Graph | ||||||||||||||||||||
21 | 197 | 525 | 489 | 750 | 1239 | 1857 | 2568 | 3850 | 5022 | 5720 | 5869 | 5894 | 4918 | 5319 | 5443 | 3715 | 2686 | 2280 | 1640 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross | on | cross | cross-on | on | cross |
High Tide | 6:56PM1.46m | 6:18AM1.43m | 7:18PM1.46m | 7:00AM1.37m | 7:41PM1.46m | 7:48AM1.28m | 8:05PM1.45m | 8:47AM1.18m | 8:33PM1.43m | 10:12AM1.09m | 9:05PM1.40m | 12:46PM1.07m | 9:50PM1.36m | |||||||
Low Tide | 00:38AM0.68m | 12:47PM0.29m | 1:15AM0.61m | 1:15PM0.41m | 1:55AM0.55m | 1:44PM0.55m | 2:41AM0.50m | 2:14PM0.72m | 3:38AM0.47m | 2:46PM0.88m | 4:53AM0.43m | 3:24PM1.05m | ||||||||
— | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | |
6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | |
mm | 2 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 31 | 29 | 31 | 31 | 26 | 25 | 25 | 25 | 28 | 29 | 25 | 28 | 29 | 27 | 30 | 30 | 27 | 29 | 29 | 26 |
Feels °C | 36 | 34 | 34 | 35 | 27 | 26 | 25 | 25 | 27 | 28 | 25 | 28 | 29 | 30 | 32 | 32 | 32 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | ESE 17 | ESE 16 | SE 15 | ESE 15 | SE 16 | ESE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | S 15 | S 15 | S 14 |
14 | 197 | 525 | 489 | 750 | 1239 | 1857 | 2568 | 3850 | 5022 | 5720 | 5869 | 5894 | 4918 | 5319 | 5443 | 3715 | 2686 | 2280 | 1640 | |
Swell 2 Height (m) Direction Period (s) | ESE 15 | SSW 6 | SSW 5 | SE 9 | S 9 | S 13 | E 14 | E 14 | E 14 | E 13 | — | — | — | E 11 | S 18 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
21 | 10 | 5 | 20 | 15 | 3 | 36 | 60 | 59 | 30 | — | — | — | 143 | 1271 | 80 | 77 | 85 | 85 | 85 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 10 | SSE 9 | E 15 | — | — | — | — | — | — | — | — | — | — | E 11 | — | ENE 16 | E 15 | E 15 | E 15 |
12 | 24 | 9 | 17 | — | — | — | — | — | — | — | — | — | — | 58 | — | 24 | 17 | 17 | 17 | |
Wind waves Height (m) Direction Period (s) | — | — | — | S 6 | ENE 4 | NE 4 | ENE 4 | ENE 4 | NE 4 | NE 5 | — | NNE 5 | — | E 10 | — | E 10 | — | — | — | — |
— | — | — | 12 | 16 | 15 | 34 | 18 | 19 | 41 | — | 56 | — | 392 | — | 255 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 53 | 0 | 27 | 27 | 30 | 111 | 111 | 111 | 111 | 27 | 30 | 515 | 41 | 0 | 30 | 27 | 9 | 30 | 58 | 9 |
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.











