Surf Forecasts:
Sakawa River surf forecast from 31 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 6AM (local time) - 1.5ft (0.5m), 12s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 5.5ft (1.7m), 12s period, ESE swell with 748 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 6AM (local time) - 1.5ft (0.5m), 12s period with E 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 Tuesday (Sep 01) at 6AM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.3m and 8s. Another secondary swell of 0.3m and 2s 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 1.7m 12s and forecast to arrive on Monday (Sep 07) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Friday (Sep 04) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 1st Sep) | 1.5ft (0.5m) 12s |
| Best Surf | 6AM (Tue 1st Sep) | 1.5ft (0.5m) 12s |
| Most Powerful | 3PM (Mon 7th Sep) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let's see what's cookin' at the Sakawa River.
We're starting off with a real slow burner. The water's a touch warmer than it should be for this time of year, about 82°, which is a nice little treat. But the waves? Nothing doing. We're looking at a solid week of flat, poor conditions. The first few days are all tiny, weak swells with cross-onshore breezes messing up the surface. You're gonna be waiting until Monday, September 7th before you even see a hint of a rideable wave.
Monday the 7th shows a little bump in size, but it's still marginal. Not worth getting the board waxed for yet. The real action starts to crank up from Tuesday, September 8th. The swell starts to push past 5 feet, and by Wednesday the 9th, we're looking at a solid 7 foot SSE swell in the afternoon. That's a lot of water moving, but the wind is blowing cross-onshore, making it a bit lumpy. At that size, this is for experienced surfers only.
Now, the one to circle on your calendar is Friday, September 11th. The morning is so-so, but the afternoon is where it's at. The wind is forecast to go glassy, and we're looking at a clean 7 foot swell from the SSE. The combined energy is a massive 1853, so there's serious power behind these waves. The swell period is 11 seconds, which is a proper groundswell, meaning the waves will have some real shape and punch. For the experienced crew, this is your moment. The Sakawa River is a river mouth, and with this long-period SSE swell, it should focus the energy into some nice lines. The crowds are noted as "sometimes", so you might have to share, but for a window this clean, it's worth it.
After that, it fades fast. The weekend of the 12th and 13th sees the swell drop and the wind go onshore again, so we're back to poor conditions. By the middle of the second week, it's all tiny, weak swells and poor surf. A short, sharp window of quality.
So, bottom line: the first week is a total washout. Your best and only real shot is the afternoon of Friday, September 11th. If you're a solid surfer and you're hungry for a clean, powerful wave, that's your time. Otherwise, it's a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Wed morning, min 23°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 60mm), heaviest during Fri night. Warm (max 29°C on Thu morning, min 20°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 10 | ESE 14 | ESE 13 | E 12 | E 12 | E 11 | E 10 | ESE 10 | ESE 10 | S 8 | S 8 | SE 8 | SE 8 | ESE 7 | SSW 8 | SSW 8 | SE 8 | SE 8 | SE 11 | SE 10 | SE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 19 | 36 | 56 | 73 | 72 | 63 | 56 | 36 | 37 | 51 | 35 | 88 | 73 | 108 | 72 | 21 | 21 | 23 | 116 | 129 | 96 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross-off | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-off |
High Tide | 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 | 8:45PM1.32m | 3:36PM1.25m | 10:48PM1.25m | |||||||||
Low Tide | 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 | 4:23AM0.38m | 6:11AM0.37m | 7:15PM1.21m | |||||||||
 | |  |  | |  | | |  |  | | |  |  |  | | | | | | | |
 | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — |
 | — | 6:13 | — | — | 6:10 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 13 | 45 | — | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 26 | 27 | 26 | 28 | 28 | 26 | 29 | 28 | 26 | 24 | 23 | 22 | 26 | 27 | 23 | 26 | 26 | 22 |
Feels °C | 27 | 29 | 27 | 29 | 30 | 30 | 30 | 30 | 30 | 31 | 30 | 29 | 26 | 24 | 23 | 24 | 25 | 21 | 22 | 22 | 19 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SE 9 | ESE 13 | E 12 | E 12 | E 11 | E 10 | S 8 | S 8 | S 8 | S 8 | SE 8 | SE 8 | ESE 7 | SSW 8 | SSW 8 | SE 8 | SE 8 | SE 11 | SE 10 | SE 10 |
| kJ | 10 | 14 | 56 | 73 | 72 | 63 | 56 | 36 | 35 | 51 | 35 | 88 | 73 | 108 | 72 | 21 | 21 | 23 | 116 | 129 | 96 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SSW 7 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | ESE 10 | ESE 10 | ESE 10 | SE 6 | S 9 | SSW 9 | SSW 9 | SE 7 | SE 7 | SSW 8 | E 9 | ESE 5 | E 8 | ESE 8 |
| kJ | 15 | 11 | 15 | 14 | 24 | 14 | 22 | 33 | 37 | 37 | 20 | 39 | 49 | 50 | 43 | 18 | 12 | 6 | 3 | 12 | 24 |
Swell 3 Height (m) Direction Period (s) | ESE 14 | ESE 14 | SE 9 | SSE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | E 10 | E 9 | E 10 | E 9 | E 9 | E 9 | SSW 8 | E 9 | SW 10 | S 10 |
| kJ | 19 | 36 | 14 | 10 | 16 | 16 | 17 | 16 | 17 | 15 | 15 | 2 | 7 | 17 | 2 | 6 | 6 | 7 | 6 | 4 | 2 |
Wind waves Height (m) Direction Period (s) | ENE 2 | ENE 2 | E 3 | E 3 | — | — | — | — | — | — | — | NE 2 | ENE 4 | NNE 4 | NNE 5 | NE 4 | NE 3 | ENE 4 | NE 4 | ENE 4 | NE 5 |
| kJ | 1 | 1 | 3 | 1 | — | — | — | — | — | — | — | 2 | 13 | 38 | 47 | 16 | 6 | 16 | 20 | 29 | 67 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 249 | 73 | 73 | 50 | 50 | 0 | 50 | 58 | 0 | 67 | 68 | 0 | 30 | 30 | 472 | 191 | 515 | 433 | 111 | 433 | 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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