Surf Forecasts:
Sakawa River surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 19 Sep, 6PM (local time) - 7.5ft (2.3m), 12s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 6AM (local time) - 7.5ft (2.3m), 14s period, SE swell with 2,082 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 9AM (local time) - 1.5ft (0.4m), 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 9AM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.4m and 9s. 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 2.3m 14s and forecast to arrive on Saturday (Sep 19) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Friday (Sep 18) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sun 13th Sep) | 1.5ft (0.4m) 13s |
| Best Surf | 6PM (Sat 19th Sep) | 7.5ft (2.3m) 12s |
| Most Powerful | 6AM (Sat 19th Sep) | 7.5ft (2.3m) 14s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s coming up for the Sakawa River.
First up, water temps are sitting at about 81°, which is a touch warmer than usual for this time of year – nothing crazy, just a little on the mild side.
Right now, we’re in a bit of a flat spell. There’s nothing worth paddling out for from now through the end of the week. We’re looking at small, weak, messy energy with cross-shore winds and very ordinary conditions. It’s one of those stretches where you’re better off checking the river from the bank or doing something else entirely. That gap runs from today, Sunday the 13th, all the way through to the middle of next week.
Things start to perk up on Friday the 18th. The morning is still small and clean, but then the afternoon brings a pulse of 2ft SE groundswell with a very long 19-second period and cross-off wind. The combined energy jumps to 390 – moderate – but the super long period means the waves will have plenty of push and shape for a river mouth. It’s not huge, but it’s clean and the sort of session where you can find a couple of good ones if you’re in the right spot.
The standout, no question, is Monday the 28th. That morning is absolute magic – glassy conditions, 7ft SSW groundswell with a 15-second period, and the combined energy hits 1924 – that’s strong. The river mouth should be handling this beautifully with that long-period swell lining up. This is for experienced surfers only; at that size and with that energy, beginners are going to be in trouble. Crowds are possible here, and on a day like that, expect some company. If you can get out Monday morning, that’s your window.
The rest of the second week has some fun-looking clean days with cross-off winds, especially around the 26th and 27th, with chest-to-head high swell from the SSE and S, but nothing beats that Monday the 28th glass-off.
Stay patient, keep an eye on the river mouth, and be ready for that Monday.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon night. Warm (max 28°C on Mon morning, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Wed morning. Warm (max 23°C on Wed morning, min 19°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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) | ESE 13 | ESE 13 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 7 | ESE 8 | ESE 8 | SE 19 | SE 15 | SE 14 | SE 12 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 56 | 55 | 39 | 44 | 77 | 144 | 107 | 82 | 71 | 57 | 57 | 42 | 30 | 19 | 25 | 23 | 354 | 1200 | 1977 | 1643 | 1162 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 9:36AM1.06m | 7:17PM1.35m | 7:36PM1.27m | |||||||||
Low Tide | 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 | 1:02PM0.99m | 3:27AM0.51m | |||||||||
 |  |  | | |  |  | | |  | |  | |  |  | | | | |  |  | |
 | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — |
 | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | — | 5:46 | — | — | 5:45 | — |
mm | — | — | — | — | — | 2 | 1 | — | 1 | 5 | 1 | — | 1 | — | 7 | — | — | — | 1 | 6 | 40 |
Temp °C | 25 | 26 | 24 | 28 | 28 | 25 | 26 | 26 | 25 | 23 | 23 | 22 | 23 | 23 | 21 | 20 | 20 | 21 | 22 | 22 | 21 |
Feels °C | 28 | 29 | 27 | 29 | 30 | 27 | 29 | 28 | 28 | 26 | 25 | 23 | 23 | 23 | 20 | 17 | 17 | 20 | 22 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 7 | ESE 8 | ESE 8 | SE 19 | SE 15 | SE 14 | SE 12 | SE 11 |
| kJ | 56 | 39 | 39 | 44 | 77 | 144 | 107 | 82 | 71 | 57 | 57 | 42 | 30 | 19 | 25 | 23 | 354 | 1200 | 1977 | 1643 | 1162 |
Swell 2 Height (m) Direction Period (s) | SE 9 | ESE 13 | ESE 12 | E 12 | E 12 | E 13 | E 13 | E 13 | S 6 | S 6 | S 6 | E 12 | E 12 | ESE 8 | SE 9 | SE 8 | ESE 9 | SE 18 | — | S 9 | SSE 15 |
| kJ | 21 | 55 | 29 | 25 | 11 | 12 | 13 | 12 | 11 | 6 | 2 | 3 | 3 | 13 | 3 | 3 | 29 | 558 | — | 2 | 44 |
Swell 3 Height (m) Direction Period (s) | SSW 7 | SSW 7 | S 7 | S 7 | E 15 | S 7 | E 16 | E 14 | E 12 | E 13 | E 13 | E 12 | E 12 | E 5 | E 13 | SE 18 | SSE 8 | ESE 8 | — | — | S 9 |
| kJ | 5 | 5 | 1 | 1 | 4 | 1 | 5 | 16 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 13 | 7 | 46 | — | — | 2 |
Wind waves Height (m) Direction Period (s) | NNE 2 | — | — | — | S 4 | WSW 3 | — | SSW 3 | — | NE 3 | NE 3 | NE 3 | NE 4 | NNE 4 | NE 4 | NNE 4 | NE 4 | NNE 4 | NNE 4 | NE 4 | — |
| kJ | 1 | — | — | — | 13 | 2 | — | 3 | — | 2 | 2 | 7 | 14 | 18 | 28 | 42 | 45 | 42 | 29 | 12 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 58 | 67 | 68 | 481 | 0 | 67 | 67 | 0 | 73 | 73 | 73 | 111 | 111 | 191 | 191 | 433 | 191 | 450 | 22 | 0 |
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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