Surf Forecasts:
Sakawa River surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 9PM (local time) - 8ft (2.4m), 14s period, S swell with glassy winds.
- Most powerful swell: Thursday 6 Aug, 6PM (local time) - 8ft (2.4m), 14s period, S swell with 2,280 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9PM (local time) - 8ft (2.4m), 14s 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 Thursday (Aug 06) at 9PM. The primary swell is predicted to be 2.4m and 14s period with a secondary swell of 0.8m and 10s. 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 2.4m 14s and forecast to arrive on Thursday (Aug 06) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Aug 06) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 6th Aug) | 8ft (2.4m) 14s |
| Best Surf | 9PM (Thu 6th Aug) | 8ft (2.4m) 14s |
| Most Powerful | 6PM (Thu 6th Aug) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Righto, let's get into it. The outlook for the Sakawa River is a pretty grim one I'm afraid. We've got a bit of a run of small, messy surf, and then a long stretch of nothing much to write home about at all.
The action is all in the first few days, starting Wednesday the 5th of August. We've got some proper size coming in with a 10 ft SE swell pushing through, but it's a real mixed bag. The wind is a cross-on from the east at 9 mph, which is going to have it all chopped up and messy. The wave energy is strong (3768), but that's just raw power, not quality. The water temp is 81°, which is about average for this time of year.
Thursday the 6th stays on the bigger side, with a 7 ft SSE swell in the morning and a 8 ft SSE swell in the afternoon. The wind swings more onshore, but it's light from the SSE at 6 mph, so it might be a bit cleaner. The energy is still high (1969 in the afternoon). But the commentary flags it all as marginal, likely due to tide or bank conditions. The river mouth can be a fickle beast.
Friday the 7th sees the swell dropping, still 7 ft from the S in the morning, but the wind is onshore again. It's all just a bit average. After that, we're looking at a real drop-off. From Saturday the 8th, the swell size and energy fall away fast, and the wind is mixed. The best looking session around this time might be Monday morning the 10th with a 2 ft E swell and a clean, cross-off wind from the NNE at 12 mph. But that's tiny, and the energy is weak (305), so you'd be on a longboard or a foiler.
Then, from the 11th of August right through to the 19th, it's a complete write-off. We're looking at near non-existent surf, with heights consistently under 3 ft and often under 2 ft. The wind is either too strong, or the swell is just too small and weak. The wave energy stays in the 100-200 range, which is very weak. Honestly, it's a blank period. There's a faint glimmer on the 20th of August with a 6 ft SSE swell starting to build again, but it's still cross-on, and the energy is only moderate (1184). It's a long way out and the forecast is less certain, but it's the only thing on the horizon. For the most part, the Sakawa River is looking more like a place for a picnic than a paddle this fortnight.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Wed afternoon, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue morning. Warm (max 30°C on Sun afternoon, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 14 | SSE 13 | SSE 13 | SSE 14 | S 14 | S 13 | S 13 | SSW 13 | SSW 12 | SSW 12 | ESE 12 | ESE 14 | ESE 13 | ESE 13 | E 12 | E 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 3768 | 2265 | 1673 | 1846 | 1922 | 1380 | 987 | 670 | 467 | 447 | 271 | 419 | 307 | 212 | 144 | 134 | 150 | 158 | 156 | 156 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | on | glassy | on | on | cross-on | cross-on | on | glassy | cross-on | on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:33PM1.43m | 10:12AM1.09m | 9:05PM1.40m | 12:46PM1.07m | 9:50PM1.36m | 3:24PM1.19m | 11:07PM1.33m | 4:05PM1.31m | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | ||||||||
Low Tide | 3:38AM0.47m | 2:46PM0.88m | 4:53AM0.43m | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | ||||||||
 |  | | | | | | | | | | |  |  | | | |  | |  | |
 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — |
 | 6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 4 |
Temp °C | 30 | 27 | 30 | 30 | 27 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 30 | 26 | 29 | 30 | 26 | 25 | 25 | 24 |
Feels °C | 31 | 30 | 33 | 33 | 33 | 32 | 32 | 31 | 31 | 31 | 31 | 30 | 31 | 30 | 27 | 28 | 25 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | SE 14 | SSE 13 | SSE 13 | SSE 14 | S 14 | S 13 | S 13 | SSW 13 | SSW 12 | SSW 12 | S 10 | ESE 14 | ESE 13 | ESE 13 | E 12 | E 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 |
| kJ | 3768 | 2265 | 1673 | 1846 | 1922 | 1380 | 987 | 670 | 467 | 447 | 208 | 419 | 307 | 212 | 144 | 134 | 150 | 158 | 156 | 156 |
Swell 2 Height (m) Direction Period (s) | — | E 10 | ESE 10 | ESE 10 | ESE 10 | SE 9 | ESE 10 | SE 9 | ESE 9 | ESE 12 | ESE 12 | S 12 | S 11 | S 12 | SSW 11 | S 11 | E 11 | E 11 | E 11 | ENE 11 |
| kJ | — | 300 | 110 | 118 | 157 | 194 | 148 | 199 | 110 | 184 | 271 | 276 | 198 | 180 | 133 | 83 | 119 | 39 | 22 | 22 |
Swell 3 Height (m) Direction Period (s) | — | S 18 | E 16 | E 16 | E 16 | E 15 | SSE 9 | ESE 9 | SSE 8 | SSE 8 | SSW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SE 12 | SSE 13 | SE 13 |
| kJ | — | 224 | 5 | 5 | 5 | 17 | 101 | 98 | 59 | 36 | 103 | 63 | 61 | 61 | 28 | 44 | 27 | 6 | 17 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | NE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 3 | — | SW 2 | N 3 |
| kJ | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 1 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 41 | 22 | 29 | 58 | 0 | 27 | 58 | 27 | 22 | 58 | 0 | 27 | 27 | 30 | 111 | 2027 | 100 | 100 | 111 | 454 |
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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