Surf Forecasts:
Sakawa River surf forecast from 31 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 3PM (local time) - 1.5ft (0.5m), 12s period, E swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 9AM (local time) - 5ft (1.5m), 10s period, SSE swell with 436 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 3PM (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 3PM. 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 1.5m 10s and forecast to arrive on Tuesday (Sep 08) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Monday (Sep 07) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 1st Sep) | 1.5ft (0.5m) 12s |
| Best Surf | 3PM (Tue 1st Sep) | 1.5ft (0.5m) 12s |
| Most Powerful | 9AM (Tue 8th Sep) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's coming down the pipe for the Sakawa River.
Right now, it’s a pretty quiet start. The first few days are a write-off with tiny, weak swell and messy winds – nothing worth paddling out for. We’re looking at a gap of about five or six days of pretty ordinary conditions before things start to get interesting from the 6th or 7th, but even then, it’s not really *good* until the 8th.
There are two standout windows in this forecast. The first is on the morning of Tuesday the 8th of September. The wind goes glassy, dead calm, and we’ll see a 1.3m swell from the southeast with a combined energy of 524 (moderate energy) and a 10-second period. That's about 4ft. It’s not huge, but with clean, glassy conditions, that’s about as good as this river mouth gets for a fun, intermediate session. Expect a few others out there, as crowds are "sometimes" a thing here.
The next one is a proper, heavy-hitter window but it’s only for experienced surfers. On the morning of Thursday the 10th of September, the Sakawa River is looking at a 2.5m (about 8ft) south groundswell with a very long 15-second period, and the combined energy is a whopping 4967 - that's a powerful, full-on swell. The wind goes dead calm, making for a glassy surface. This is not for beginners – 2.5m is expert territory, especially when it’s that powerful. The long period is great for the river mouth setup, but it’ll be big and the sets will be relentless. The morning of the 12th also looks promising with glassy winds and a solid 2.0m (about 7ft) SSE swell, a good backup option for strong intermediates.
The water temp is about average for this time of year, nothing unusual there.
Overall, the Sakawa River likes to tease you – long gaps of nothing, then a couple of clean, punchy days. For now, circle that Tuesday the 8th and Thursday the 10th mornings. Everything else in between is mostly blown out or just too small.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Thu night. Warm (max 28°C on Wed morning, min 22°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 48mm), heaviest during Sun night. Warm (max 26°C on Sat afternoon, min 20°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | E 12 | E 12 | E 11 | E 10 | ESE 10 | S 9 | S 9 | S 8 | S 9 | S 10 | S 9 | SSW 9 | S 8 | S 8 | SE 8 | SE 8 | E 4 | SE 7 | SE 8 | SE 7 | SE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 73 | 72 | 63 | 56 | 36 | 39 | 54 | 68 | 57 | 90 | 83 | 103 | 50 | 33 | 31 | 34 | 33 | 50 | 75 | 91 | 235 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | glassy | cross-on | cross-off | glassy | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 3:45PM1.33m | 1:09AM1.28m | |||||||||
Low Tide | 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 | 7:42AM0.29m | 8:41PM1.09m | |||||||||
 | |  |  |  |  | |  |  |  |  |  | |  | | | | |  | | | |
 | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — |
 | — | 6:10 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — |
mm | — | — | — | — | — | — | — | 3 | 22 | 3 | 6 | 3 | 1 | 1 | — | — | 2 | 32 | 14 | 3 | — |
Temp °C | 26 | 27 | 26 | 28 | 28 | 26 | 27 | 27 | 22 | 23 | 22 | 22 | 23 | 26 | 23 | 23 | 22 | 21 | 22 | 23 | 23 |
Feels °C | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 25 | 24 | 23 | 23 | 22 | 25 | 23 | 21 | 20 | 20 | 23 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 12 | E 11 | E 10 | S 8 | S 9 | S 9 | S 8 | S 9 | S 10 | SE 8 | SSW 9 | S 8 | S 8 | SE 8 | SE 8 | SSW 9 | SE 7 | SE 8 | SE 7 | SE 10 |
| kJ | 73 | 72 | 63 | 56 | 36 | 39 | 54 | 68 | 57 | 90 | 60 | 103 | 50 | 33 | 31 | 31 | 7 | 50 | 75 | 91 | 235 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | S 8 | SSW 8 | SSW 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 6 | SE 9 | S 9 | SE 7 | SE 7 | SE 8 | SSW 8 | SSW 8 | SE 12 | ESE 11 | E 7 | ESE 11 | SSW 9 |
| kJ | 14 | 23 | 14 | 23 | 33 | 37 | 18 | 18 | 15 | 61 | 83 | 62 | 44 | 32 | 20 | 12 | 5 | 12 | 28 | 12 | 7 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 12 | E 9 | E 9 | — | SE 9 | — | SE 12 | SE 12 | SE 8 | S 9 | ESE 11 | SSW 9 | SW 9 |
| kJ | 10 | 16 | 16 | 17 | 16 | 17 | 15 | 15 | 26 | 7 | 27 | — | 3 | — | 6 | 6 | 3 | 2 | 12 | 8 | 19 |
Wind waves Height (m) Direction Period (s) | E 2 | — | — | — | — | — | — | — | — | NNE 3 | ENE 2 | NE 3 | NE 3 | ENE 3 | ENE 4 | NE 4 | E 4 | NE 4 | NNE 4 | NNE 4 | NNE 4 |
| kJ | 1 | — | — | — | — | — | — | — | — | 3 | 1 | 2 | 6 | 4 | 20 | 34 | 33 | 34 | 43 | 14 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 73 | 66 | 50 | 0 | 0 | 58 | 0 | 0 | 53 | 66 | 30 | 515 | 515 | 515 | 515 | 191 | 191 | 450 | 191 | 468 | 191 |
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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