Surf Forecasts:
Sakawa River surf forecast from 3 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 3AM (local time) - 7ft (2.1m), 10s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 12PM (local time) - 8ft (2.5m), 10s period, SSE swell with 1,308 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 2ft (0.6m), 11s 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 Friday (Sep 04) at 12AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.4m and 3s. 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 2.5m 10s and forecast to arrive on Tuesday (Sep 08) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 5s period and expected on Sunday (Sep 06) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 4th Sep) | 2ft (0.6m) 11s |
| Best Surf | 3AM (Tue 8th Sep) | 7ft (2.1m) 10s |
| Most Powerful | 12PM (Tue 8th Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the Sakawa River.
Right off the bat, it’s a pretty quiet start. The first few days are a write-off with nothing worth paddling out for. The surf just isn’t there, and the conditions are messy. We’re looking at a bit of a gap until things finally get interesting.
The standout window is Tuesday, 8th September. That’s the one to circle on the calendar. We’ve got a solid pulse of swell coming in from the SSE around 8 feet, with a period of 10 seconds. The combined energy is strong, clocking in at (1271). That’s proper wave energy for this spot. The wind is light and cross-offshore from the WSW, so expect clean, well-shaped lines. This is genuinely good surf, and the kind of day that makes the wait worthwhile. The water temp is about 80°, which is pretty average for this time of year, nothing out of the ordinary.
The swell direction from the SSE is a good match for the river mouth, and with that light offshore wind, the Sakawa River should be holding some nice, rippable waves. It’s a fairly consistent break, but you might find a few others out there as well, so don’t expect total solitude.
After that Tuesday, things drop off again. The 9th sees the swell backing off a bit to 5 feet with a 9-second period, and the wind goes cross and then cross-on, so it’s a bit of a gamble. The wave energy is moderate (444), but the conditions are marginal. The rest of the week and into the second week looks pretty poor, with small, weak swell and dodgy winds. There’s a glimmer on 15th September with a glassy morning, but the swell is tiny at 3 feet and the energy is weak (95). It’s surfable, but very ordinary.
Honestly, for the 16-day window, the only real call is that Tuesday 8th. The rest is a long stretch of small, choppy, or onshore slop. If you’re a beginner, that 8-foot day might be a bit much, it’s better suited to those with a bit more experience. For the rest of the time, you’re probably better off doing something else.
Rusty.
Short Range ForecastHeavy rain (total 40mm), heaviest during Fri night. Warm (max 29°C on Thu afternoon, min 21°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 169mm), heaviest during Mon afternoon. Warm (max 27°C on Tue morning, min 20°C on Sun night). Winds decreasing (fresh winds from the N on Sun night, calm by Tue night). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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) | S 8 | S 11 | S 10 | S 10 | SSW 9 | S 9 | ESE 7 | NE 4 | ESE 7 | ENE 5 | ESE 9 | E 9 | SE 8 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | S 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 36 | 85 | 96 | 68 | 66 | 42 | 31 | 34 | 28 | 150 | 201 | 55 | 100 | 486 | 1241 | 1147 | 615 | 433 | 521 | 786 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-off | glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | on | cross-off | cross-off | cross-off | glassy | cross | cross-on | cross-off |
High Tide | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | 8:45PM1.32m | 3:36PM1.25m | 10:48PM1.25m | 3:45PM1.33m | 1:09AM1.28m | 4:04PM1.39m | 2:29AM1.38m | 4:25PM1.43m | |||||||||
Low Tide | 3:03AM0.35m | 1:53PM1.01m | 4:23AM0.38m | 6:11AM0.37m | 7:15PM1.21m | 7:42AM0.29m | 8:41PM1.09m | 8:43AM0.22m | 9:20PM0.95m | 9:30AM0.17m | 9:53PM0.79m | |||||||||
 |  |  | |  | |  |  |  | | |  | |  | |  | | | | | |
 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — |
 | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — |
mm | 1 | 2 | 2 | 5 | 28 | 2 | — | — | — | — | 54 | 40 | 58 | 2 | — | 1 | 9 | 5 | 8 | 15 |
Temp °C | 29 | 25 | 26 | 25 | 23 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 26 | 25 | 27 | 26 | 26 | 26 | 27 | 25 |
Feels °C | 32 | 29 | 30 | 29 | 26 | 21 | 22 | 21 | 19 | 18 | 17 | 21 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 11 | S 10 | S 10 | SSW 9 | S 9 | ESE 7 | ESE 7 | ESE 7 | SE 8 | ESE 9 | E 9 | SE 8 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | S 10 |
| kJ | 36 | 85 | 96 | 68 | 66 | 42 | 31 | 29 | 28 | 3 | 201 | 55 | 100 | 486 | 1241 | 1147 | 615 | 433 | 521 | 786 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | NE 3 | SE 6 | SE 7 | SE 6 | SE 7 | SSW 9 | SSW 8 | SSE 8 | S 9 | S 9 | SSE 8 | ESE 9 | E 8 | ENE 8 | S 11 | — | E 17 | E 16 | E 16 |
| kJ | 18 | 3 | 14 | 15 | 15 | 23 | 26 | 14 | 6 | 2 | 2 | 37 | 25 | 5 | 24 | 2 | — | 6 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 5 | SE 9 | SE 9 | SE 9 | E 9 | SE 9 | SE 8 | SSW 9 | S 10 | — | ESE 11 | SSW 9 | — | SW 12 | S 11 | E 18 | E 17 | E 16 | E 15 |
| kJ | 15 | 5 | 13 | 13 | 12 | 6 | 3 | 3 | 7 | 2 | — | 12 | 8 | — | 6 | 9 | 6 | 5 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | SSW 3 | — | — | — | NE 3 | NE 3 | NE 4 | NE 4 | NE 5 | ENE 5 | NNE 5 | NNE 5 | NNE 4 | NNE 4 | NE 3 | NE 3 | N 3 | — | NNE 2 | — |
| kJ | 3 | — | — | — | 1 | 4 | 12 | 34 | 87 | 150 | 123 | 52 | 39 | 19 | 3 | 2 | 1 | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 67 | 0 | 0 | 0 | 0 | 66 | 111 | 515 | 433 | 433 | 433 | 66 | 111 | 0 | 0 | 0 | 0 | 100 | 475 | 73 |
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.
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