Surf Forecasts:
Sakawa River surf forecast from 22 Aug 2026:
- Best quality surf: Monday 24 Aug, 9PM (local time) - 5.5ft (1.7m), 15s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 7ft (2.1m), 14s period, S swell with 1,710 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 6PM (local time) - 1.5ft (0.5m), 12s period with SE 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 Sunday (Aug 23) at 6PM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.4m and 8s. 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 2.1m 14s and forecast to arrive on Tuesday (Aug 25) 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 0.7m 4s period and expected on Friday (Aug 28) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
| Best Surf | 9PM (Mon 24th Aug) | 5.5ft (1.7m) 15s |
| Most Powerful | 3PM (Tue 25th Aug) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s coming for the local stretch.
The start of the period is flat and ugly, so you’re gonna have to be patient. The first real chance for a wave shows up on Monday the 24th of August, but even then it’s not all good. The standout session in the whole forecast is the Monday morning at the Sakawa River. That’s the one to aim for. We’ve got clean 4ft of SSE groundswell rolling in with a long 14 second period, and the wind is glassy. It’s gonna be smooth, with good shape and proper energy for an intermediate surfer. The combined energy is moderate at 663, so there’s enough push to have fun without it being a washing machine. The river mouth setup should handle that long-period groundswell well.
Tuesday the 25th sees a jump in size, with 6ft to 7ft of S/SSE swell, still long period at 14 seconds, but the wind turns cross-onshore and the conditions get a bit lumpy. The combined energy is strong, hitting between 1755 and 1778, so there’s plenty of power, but it’s not clean. The morning is the better call, but it’s marginal at best. This is edging into expert territory if you’re out there in the bigger stuff.
After that, the surf slowly winds down through the week. Wednesday the 26th drops to 5ft, still cross-shore wind, and the energy eases back to 765. It’s surfable but nothing to write home about. From Thursday the 27th right through to the end of August, it’s mostly small, weak, and messy. A few glassy windows pop up on Friday the 28th and Saturday the 29th, but with only 3ft to 3ft of short-period S swell and weak energy around 122 to 163, you’re really just scratching for something rideable.
We get a brief pulse of cleaner conditions on Monday the 31st of August, with 3ft of ESE groundswell at 14 seconds going glassy in the afternoon. The energy picks up to 539, and it’s a decent option if you’re desperate. Tuesday the 1st of September keeps that clean cross-off wind, but the swell is smaller at 2ft to 3ft.
From there it’s another run of marginal, onshore, or cross-shore wind slop. The surf tries to build again around Thursday the 3rd and Friday the 4th of September, with 4ft to 5ft of SSE swell, but the wind is strong and onshore or cross-onshore, ruining the quality. The energy is high, up in the 840 to 913 range, but it’s choppy and messy. By Saturday the 5th of September, the swell drops right off and the period goes long again at 15 to 16 seconds, but with small 2ft to 3ft waves and cross-shore wind, it’s not really doing anything.
So the bottom line: Monday the 24th of August, early morning at the Sakawa River, is your pick. It’s not huge, but it’s clean, glassy, and the swell has proper length to it. The rest of the period is a waiting game with only small windows of average surf.
Stay safe out there.
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Sat night. Warm (max 29°C on Tue morning, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Fri afternoon. Warm (max 30°C on Wed afternoon, min 24°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 | SSW 9 | SE 13 | SE 13 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | S 14 | S 13 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | S 9 | S 9 | S 8 | S 9 | S 10 |
Wave Graph | |||||||||||||||||||
30 | 25 | 43 | 134 | 647 | 561 | 1439 | 1172 | 1710 | 1256 | 638 | 373 | 221 | 128 | 150 | 133 | 115 | 126 | 164 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | on | glassy | glassy | cross-on | cross-off | cross-on | cross-on | cross-off | cross | cross | cross-off | cross | cross | glassy | cross | glassy | cross |
High Tide | 9:51PM1.23m | 4:23PM1.21m | 00:27AM1.21m | 4:22PM1.27m | 1:56AM1.27m | 4:35PM1.33m | 2:52AM1.35m | 4:51PM1.38m | 3:36AM1.42m | 5:08PM1.43m | 4:16AM1.47m | 5:27PM1.46m | |||||||
Low Tide | 7:42AM0.47m | 8:28PM1.13m | 8:39AM0.38m | 9:13PM1.05m | 9:21AM0.30m | 9:43PM0.95m | 9:55AM0.23m | 10:11PM0.85m | 10:25AM0.20m | 10:39PM0.74m | 10:54AM0.20m | 11:08PM0.63m | |||||||
— | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | |
6:23 | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — | |
mm | 4 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 7 |
Temp °C | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 29 | 26 | 29 | 30 | 27 | 30 | 30 | 27 | 27 | 26 | 24 |
Feels °C | 30 | 31 | 32 | 31 | 31 | 31 | 29 | 32 | 32 | 28 | 31 | 32 | 31 | 33 | 32 | 32 | 30 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SE 13 | SE 13 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | S 14 | S 13 | SSW 13 | SSW 12 | SSW 11 | SSE 8 | SSW 10 | S 9 | S 8 | S 9 | S 10 |
26 | 25 | 43 | 134 | 647 | 561 | 1439 | 1172 | 1710 | 1256 | 638 | 373 | 221 | 80 | 41 | 125 | 115 | 126 | 164 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | ESE 11 | ESE 11 | SSW 8 | S 8 | SSE 17 | ESE 15 | S 16 | ESE 13 | ESE 13 | SE 10 | E 12 | SSE 9 | SSW 11 | SE 10 | ESE 10 | SE 10 | SE 9 | SSE 9 |
30 | 24 | 23 | 23 | 12 | 522 | 42 | 539 | 35 | 33 | 98 | 25 | 119 | 128 | 16 | 18 | 16 | 22 | 8 | |
Swell 3 Height (m) Direction Period (s) | SSE 4 | SSE 13 | S 16 | SSE 17 | SW 10 | ESE 12 | E 15 | ESE 14 | — | WSW 10 | ESE 12 | SE 15 | ESE 11 | S 9 | ESE 10 | SSE 10 | E 12 | SSW 11 | SE 13 |
4 | 18 | 5 | 59 | 4 | 28 | 155 | 67 | — | 9 | 29 | 8 | 25 | 16 | 11 | 10 | 11 | 12 | 7 | |
Wind waves Height (m) Direction Period (s) | WSW 2 | — | S 8 | — | — | SSW 8 | SW 4 | SW 9 | SSW 3 | SW 3 | — | SSE 9 | SW 3 | — | S 9 | S 8 | NE 4 | NE 4 | — |
1 | — | 22 | — | — | 6 | 12 | 21 | 10 | 7 | — | 146 | 2 | — | 150 | 133 | 12 | 3 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 68 | 73 | 58 | 0 | 0 | 68 | 0 | 67 | 454 | 0 | 24 | 114 | 0 | 24 | 115 | 0 | 30 | 0 | 58 |
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.











