
Surf Forecasts:
Sakawa River surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 3AM (local time) - 1.5ft (0.5m), 13s period, ESE swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 9AM (local time) - 1.5ft (0.5m), 18s period, SE swell with 155 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 3AM (local time) - 1.5ft (0.5m), 13s period with ESE 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 (Sep 13) at 3AM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.3m and 7s. 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 0.5m 18s and forecast to arrive on Friday (Sep 18) 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 0.5m 3s period and expected on Friday (Sep 11) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 13th Sep) | 1.5ft (0.5m) 13s |
| Best Surf | 3AM (Sun 13th Sep) | 1.5ft (0.5m) 13s |
| Most Powerful | 9AM (Fri 18th Sep) | 1.5ft (0.5m) 18s |
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 pike for the Sakawa River.
Right off the bat, the next few days are looking pretty flat and messy. We've got some small, weak swell in the water, but with heavy rain and poor conditions, it's just not worth paddling out. There's a bunch of these days in a row where the energy is tiny – combined energy readings down around 57 to 91 – and the wind is all over the place. Honestly, it's a bit of a dud from Friday the 11th all the way through to Monday the 14th. There's hardly anything on offer.
Now, we start to see a flicker of life on Tuesday the 15th. We've got a weak 3 ft swell from the S, with a period of just 8 to 9 seconds. The energy is picking up a little, hitting around 147, but the water's still a bit grotty. It's surfable, but only just. Not worth getting too excited about.
The real story starts to build in the second week, around Friday the 18th of September. The swell period jumps to a very long 18 seconds from the SE. That's a groundswell, and it's packing a lot more punch, with combined energy hitting 214. The light offshore wind from the NNE will have the waves looking pretty clean. This is the first glimpse of something good.
But the standout day – the absolute best on offer – is Sunday the 20th of September. We’ve got a solid 7 ft to 7 ft swell from the S, with a long, juicy 14-second period. The combined energy is massive, between 2032 and 2886, showing there's plenty of power behind it. The wind is light and cross-off from the NNE, which will keep things clean. This is serious size though – over 7 ft is expert territory at a river mouth. The setup will be better for more experienced surfers. The long period groundswell will line up nicely on the point or river bank, making for some proper walls. Just be aware, this spot can get a crowd sometimes.
Monday the 21st gets even bigger, with 10 ft to 18 ft S swell, but at a river mouth that's just too much. It's an expert-only, potentially dangerous situation. The energy reading is off the charts at 10778. It's a big wave day, but only for the very few.
After that, things drop back down, with Tuesday the 22nd offering a smaller, cleaner 4 ft from the SSE, but the quality is just "good," not a standout. The rest of the forecast peters out into small, weak, or windy conditions.
So, to boil it down: forget the first week. The only real window of quality is Sunday the 20th of September at the Sakawa River. It's going to be powerful, clean, and solid. If you're an experienced surfer and you can wait, that's your day. Anything else before that is just a waste of a wetsuit.
Rusty.
Short Range ForecastHeavy rain (total 43mm), heaviest during Fri morning. Warm (max 26°C on Sun afternoon, min 19°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Tue morning. Warm (max 28°C on Mon morning, min 22°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | S 8 | S 8 | SE 10 | SE 10 | ESE 14 | ESE 13 | ESE 13 | ESE 13 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SE 8 | ESE 8 | SE 8 |
Wave Graph | |||||||||||||||||||||
41 | 41 | 28 | 24 | 37 | 69 | 56 | 55 | 58 | 53 | 94 | 119 | 129 | 115 | 71 | 62 | 66 | 66 | 38 | 39 | 31 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-on | cross-on | cross-off | glassy | glassy | glassy | glassy | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:05PM1.48m | 4:59AM1.54m | 5:24PM1.50m | 5:40AM1.52m | 5:42PM1.51m | 6:20AM1.46m | 6:01PM1.51m | 6:59AM1.37m | 6:20PM1.49m | 7:40AM1.27m | 6:39PM1.46m | 8:27AM1.16m | 6:58PM1.41m | ||||||||
Low Tide | 10:43AM0.24m | 10:57PM0.49m | 11:14AM0.34m | 11:29PM0.37m | 11:42AM0.46m | 00:01AM0.29m | 12:07PM0.58m | 00:34AM0.27m | 12:29PM0.71m | 1:07AM0.28m | 12:48PM0.81m | 1:43AM0.34m | 1:01PM0.91m | 2:27AM0.42m | |||||||
5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | |
— | 5:57 | — | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | |
mm | 24 | 6 | 6 | 6 | 1 | — | — | — | — | — | — | — | 6 | — | — | 1 | 4 | 4 | — | — | — |
Temp °C | 20 | 20 | 20 | 21 | 21 | 22 | 25 | 26 | 24 | 28 | 28 | 25 | 24 | 24 | 24 | 25 | 25 | 23 | 24 | 24 | 23 |
Feels °C | 22 | 22 | 22 | 23 | 23 | 24 | 28 | 29 | 28 | 30 | 30 | 28 | 28 | 28 | 28 | 29 | 29 | 25 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | SSW 7 | SSW 7 | ESE 13 | ESE 13 | SE 8 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SE 8 | ESE 8 | SE 8 |
41 | 41 | 28 | 18 | 18 | 69 | 56 | 42 | 58 | 53 | 94 | 119 | 129 | 115 | 71 | 62 | 66 | 66 | 38 | 39 | 31 | |
Swell 2 Height (m) Direction Period (s) | ESE 6 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 7 | SE 9 | ESE 13 | ESE 12 | ESE 12 | E 12 | E 13 | E 13 | E 13 | E 12 | E 13 | E 13 | E 12 | E 12 | SE 9 | SE 9 |
6 | 14 | 25 | 24 | 23 | 9 | 29 | 55 | 29 | 28 | 11 | 12 | 13 | 12 | 11 | 3 | 3 | 3 | 3 | 3 | 3 | |
Swell 3 Height (m) Direction Period (s) | ESE 10 | E 14 | E 14 | E 14 | ESE 14 | — | SSW 7 | SSW 7 | S 7 | S 7 | E 15 | S 7 | E 16 | E 12 | E 14 | E 11 | E 11 | S 6 | E 12 | E 11 | SE 14 |
9 | 16 | 14 | 15 | 37 | — | 5 | 5 | 1 | 1 | 4 | 1 | 5 | 3 | 4 | 2 | 2 | 3 | 3 | 2 | 7 | |
Wind waves Height (m) Direction Period (s) | NE 3 | NE 3 | NNE 3 | NE 3 | NNE 3 | NE 3 | NE 3 | — | — | — | S 3 | WSW 2 | — | — | NE 3 | NE 2 | — | ENE 3 | NE 3 | NNE 3 | — |
1 | 2 | 4 | 5 | 4 | 2 | 1 | — | — | — | 5 | 1 | — | — | 1 | 1 | — | 3 | 1 | 2 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 73 | 73 | 73 | 73 | 89 | 82 | 73 | 50 | 0 | 53 | 68 | 0 | 0 | 0 | 0 | 82 | 58 | 73 | 73 | 110 | 73 |
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.










