Surf Forecasts:
Sakawa River surf forecast from 24 Jul 2026:
- Best quality surf: Friday 24 Jul, 9PM (local time) - 1ft (0.3m), 16s period, SE swell with glassy winds.
- Most powerful swell: Sunday 26 Jul, 3PM (local time) - 1.5ft (0.4m), 14s period, SE swell with 74 kJ wave energy.
- Next surfable swell (1★+): Friday 24 Jul, 9PM (local time) - 1ft (0.3m), 16s period with SE 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 (Jul 24) at 9PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.3m and 16s. 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 0.4m 14s and forecast to arrive on Sunday (Jul 26) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Jul 31) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 24th Jul) | 1ft (0.3m) 16s |
| Best Surf | 9PM (Fri 24th Jul) | 1ft (0.3m) 16s |
| Most Powerful | 3PM (Sun 26th Jul) | 1.5ft (0.4m) 14s |
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 the Sakawa River has in store for us.
Right off the bat, the first week is a real struggle. We’ve got tiny 1ft to 1ft swells coming from the SE with long periods, but the energy is basically non-existent, with combined energy readings mostly in the 30s, 60s, or 70s (weak). That’s not enough to get excited about. The water is sitting at 80°, which is about average for this time of year, but you won't be feeling it with nothing to ride. The wind offers a few glassy looks on the mornings of Saturday the 25th and Sunday the 26th, but it’s on a tiny swell, and the "poor surf conditions" tag tells the story. There's a gap of nearly a week where the surf is just not worth a paddle.
We start to see a change around Tuesday the 4th of August. The swell bumps up to 3ft on Tuesday morning, with combined energy hitting 325 (moderate), but it’s a cross-shore wind and it’s still called "marginal." By Tuesday afternoon, the swell is 5ft from the SE with a period of 16 seconds, and the energy jumps to 1268 (moderate). The wind is cross-onshore, making it choppy, so it’s not great for a paddle.
Now, the real standout is the end of the run. From Thursday the 6th of August through Saturday the 8th, the swell goes absolutely mental. We’re talking 12ft to 18ft from the SE, with periods of 17 to 18 seconds (very long period groundswell). The combined energy readings are massive – 7843, 8463, 11467, 11835, even 20284 (strong to very strong). The wind is clean early on Thursday morning with a cross-offshore breeze, but this is a river mouth. A long-period swell this big is going to be a washing machine. The guidance says it’s "too big for this break," and with heights over 8ft, this is strictly for experts only, if anyone is brave enough. By Friday afternoon and Saturday, the wind turns into a strong cross-shore and then a near gale, making it a total mess. Honestly, for a beach-and-river setup like this, with that much wind and swell, it looks better suited for a kite than a surfboard.
So, if you're looking for a paddle, the best bet is the glassy morning on Sunday, July 26th, with that 1ft SE swell. It’s tiny, but it’s clean. For the big stuff, Thursday the 6th morning is the cleanest window, but only if you’re a seasoned charger and know the river mouth well. The crowds are "sometimes" on the Sakawa River, so expect a few locals out if it's rideable. For the rest of us, it’s a waiting game.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Sat afternoon. Warm (max 30°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Mon afternoon. Warm (max 28°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | |||||||||||||||
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 18 | SE 17 | SE 16 | SE 16 | SE 16 | SE 15 | SE 15 | SE 14 | SE 14 | SE 14 | SE 14 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 49 | 45 | 41 | 40 | 39 | 35 | 42 | 74 | 52 | 51 | 36 | 36 | 35 | 35 | 48 | 34 | 46 | 31 | 23 | 23 | 23 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | glassy | cross-on | cross | glassy | cross-on | cross-off | cross | cross-on | cross | cross | glassy | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | cross-off |
High Tide | 4:25PM1.11m | 11:26PM1.28m | 4:24PM1.19m | 00:48AM1.28m | 4:44PM1.26m | 1:59AM1.31m | 5:06PM1.31m | 2:54AM1.37m | 5:29PM1.36m | 3:40AM1.42m | 5:51PM1.39m | 4:21AM1.46m | 6:13PM1.42m | ||||||||
Low Tide | 5:07PM1.11m | 8:03AM0.40m | 7:57PM1.13m | 8:56AM0.32m | 9:09PM1.09m | 9:39AM0.25m | 9:52PM1.04m | 10:16AM0.18m | 10:26PM0.97m | 10:50AM0.14m | 10:59PM0.90m | 11:21AM0.13m | 11:31PM0.83m | ||||||||
 | |  | |  | |  | | | | | | | |  | |  |  | | | | |
 | 4:45 | — | — | 4:46 | — | — | 4:47 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — |
mm | — | — | 2 | — | 5 | 3 | — | 3 | 3 | 4 | 11 | 8 | — | 2 | 1 | 3 | 1 | — | — | — | — |
Temp °C | 29 | 29 | 27 | 29 | 30 | 28 | 28 | 28 | 27 | 28 | 27 | 24 | 26 | 27 | 25 | 27 | 27 | 25 | 28 | 29 | 26 |
Feels °C | 33 | 33 | 33 | 35 | 35 | 34 | 32 | 31 | 33 | 31 | 30 | 26 | 28 | 30 | 29 | 30 | 30 | 29 | 30 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 |
| kJ | 23 | 18 | 40 | 35 | 35 | 35 | 42 | 40 | 39 | 37 | 36 | 36 | 35 | 35 | 48 | 34 | 46 | 31 | 23 | 23 | 23 |
Swell 2 Height (m) Direction Period (s) | S 7 | SE 17 | SE 16 | SE 16 | SE 16 | SE 15 | SE 15 | SE 14 | SE 14 | SE 14 | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SE 12 | SE 12 |
| kJ | 4 | 45 | 41 | 40 | 39 | 35 | 34 | 74 | 52 | 51 | 22 | 23 | 15 | 15 | 14 | 14 | 13 | 6 | 6 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | SE 18 | SSW 7 | — | ESE 4 | ESE 4 | S 8 | S 7 | S 8 | SSW 9 | SSW 8 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | E 3 | — | SE 12 | E 14 | SSW 8 |
| kJ | 49 | 5 | — | 1 | 1 | 5 | 4 | 5 | 15 | 14 | 30 | 28 | 28 | 27 | 7 | 7 | 1 | — | 6 | 4 | 6 |
Wind waves Height (m) Direction Period (s) | — | SE 2 | — | — | — | — | E 4 | SSE 2 | E 5 | ESE 5 | E 4 | ESE 3 | ENE 3 | ENE 4 | ENE 7 | ENE 3 | — | — | — | SSW 8 | SW 3 |
| kJ | — | 1 | — | — | — | — | 1 | 1 | 2 | 4 | 10 | 2 | 2 | 5 | 15 | 1 | — | — | — | 20 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 73 | 53 | 0 | 50 | 58 | 67 | 0 | 114 | 0 | 31 | 73 | 82 | 73 | 0 | 73 | 58 | 53 | 82 | 90 | 114 | 114 |
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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