Surf Forecasts:
Sakawa River surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 9PM (local time) - 6ft (1.8m), 15s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 7ft (2.2m), 14s period, S swell with 1,972 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 3AM (local time) - 1.5ft (0.5m), 10s period with SSW 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 Saturday (Aug 22) at 3AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.4m and 11s. 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 2.2m 14s and forecast to arrive on Tuesday (Aug 25) 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 0.5m 3s period and expected on Wednesday (Aug 26) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 22nd Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 9PM (Mon 24th Aug) | 6ft (1.8m) 15s |
| Most Powerful | 3PM (Tue 25th Aug) | 7ft (2.2m) 14s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Righto, let’s have a look at what’s on the cards for the Sakawa River.
Overall, it’s a patchy run ahead. The first week is mostly small and messy, with a couple of moments that might get you interested, but nothing that’ll have you racing down. There’s a gap of several days with no real recommendations from the start, so don’t rush. The real standout sits right at the end of the month – Monday the 31st of August is the one to circle. That morning is clean, glassy, and serving up solid 8ft swell from the SSE with a 12-second period. The combined swell energy is strong at 1584, and with glassy conditions, the river mouth should be running nicely. That’s a session for experienced surfers only – it’s a bit of size and the river can get pushy. The wind is from the SSE at 3 mph, basically flat calm. This is the best on offer, no question.
Before that, Saturday the 22nd is a write-off. Sunday the 23rd afternoon sees a tiny bump – 1ft from the SE, period 13 seconds (that’s a long period for such small surf), and glassy wind from the SSW at 3 mph. The energy is weak at 83. Ordinary, but a longboard might find a few. Monday the 24th morning brings a bit more size at 2ft from the SSE, period 19 seconds (very long period), energy moderate at 779. The wind is light cross-onshore, so it’s a bit textured. The long period means the sets will be spaced out and the wave shape might be a bit straight at a river mouth, but if you’re patient, there could be a corner.
Tuesday the 25th morning has 6ft from the SSE, period 14 seconds, energy strong at 1907 – but the wind is cross-onshore at 6 mph, so it’s bumpy. This is more size than quality. Wednesday the 26th afternoon is clean with a 4ft SSW swell, period 12 seconds, energy moderate at 533. That’s a decent option if the earlier days are a bust.
Then there’s a dry spell through Thursday and Friday. Saturday the 30th sees another pulse: 7ft from the SE on Sunday afternoon, period 13 seconds, energy strong at 1455, but the wind is cross-onshore again. Still, there’s power there.
Monday the 31st is the highlight. After that, Tuesday the 1st of September holds around 6ft from the SE, period dropping to 10 seconds, energy moderate at 776. The morning is cross-on but light. Not as good as Monday.
Wednesday the 2nd and Thursday the 3rd of September see the swell drop and the wind pick up strong from the north-northeast, up to 19 mph. That’s rubbish for surfing but might make for a solid kite session if that’s your thing. The swell direction is mostly SE, period short and choppy.
The Sakawa River (Sakawa River) is a river mouth, fairly exposed to the swell, with an optimum direction from the SE. The crowd factor is “sometimes,” so you might have company on the good days. The water temp anomaly isn’t given here, so I can’t comment on that.
To sum it up: wait till Monday the 31st of August for the best dawn patrol. Everything before that is small, windy, or both. The second week looks less reliable, with wind and smaller swells taking over.
Rusty
Short Range ForecastHeavy rain (total 20mm), heaviest during Sat night. Warm (max 28°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Warm (max 29°C on Tue morning, min 24°C on Thu afternoon). Wind will be generally light. | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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 11 | SSW 9 | SE 10 | SE 11 | SSW 9 | SE 13 | SE 13 | SSE 19 | SSE 17 | SSE 14 | SSE 14 | S 14 | S 13 | SSW 12 | SSW 12 | SSW 11 | SSE 10 | SSE 7 | S 7 |
Wave Graph | |||||||||||||||||||
29 | 47 | 32 | 30 | 25 | 43 | 170 | 371 | 745 | 1127 | 1189 | 1972 | 1218 | 519 | 355 | 167 | 135 | 48 | 79 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross-off | cross | glassy | glassy | cross-on | cross-on | cross-off | cross-on | cross-on | cross-off | cross | cross-off | cross-off | cross | cross | glassy |
High Tide | 9:51PM1.23m | 4:23PM1.21m | 00:27AM1.21m | 4:22PM1.27m | 1:56AM1.27m | 4:35PM1.33m | 2:52AM1.35m | 4:51PM1.38m | 3:36AM1.42m | 5:08PM1.43m | |||||||||
Low Tide | 6:10AM0.53m | 7:42AM0.47m | 8:28PM1.13m | 8:39AM0.38m | 9:13PM1.05m | 9:21AM0.30m | 9:43PM0.95m | 9:55AM0.23m | 10:11PM0.85m | 10:25AM0.20m | 10:39PM0.74m | ||||||||
— | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | |
6:25 | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:17 | — | |
mm | 2 | — | 4 | 11 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | 2 | 8 | 10 |
Temp °C | 25 | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 29 | 29 | 26 | 28 | 26 | 25 | 25 | 24 | 24 |
Feels °C | 28 | 31 | 32 | 31 | 30 | 31 | 30 | 31 | 30 | 30 | 32 | 31 | 28 | 32 | 28 | 28 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SE 13 | SE 13 | SSE 12 | SSE 14 | SSE 14 | SSE 14 | S 14 | S 13 | SSW 12 | SSW 12 | SSW 11 | SSE 10 | SSE 7 | S 7 |
25 | 47 | 32 | 26 | 25 | 43 | 170 | 193 | 722 | 1127 | 1189 | 1972 | 1218 | 519 | 355 | 167 | 135 | 48 | 79 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 5 | SE 10 | SSE 5 | ESE 11 | ESE 11 | S 8 | SSE 19 | SSE 17 | S 17 | S 16 | ESE 13 | ESE 13 | SSE 9 | ESE 12 | SSE 9 | S 8 | S 8 | ESE 9 |
29 | 5 | 28 | 5 | 24 | 23 | 22 | 371 | 745 | 667 | 651 | 35 | 33 | 75 | 28 | 70 | 29 | 36 | 17 | |
Swell 3 Height (m) Direction Period (s) | SE 4 | SE 10 | E 9 | SE 11 | SSE 13 | SSW 8 | E 13 | SSE 16 | ESE 12 | ESE 15 | ESE 14 | SW 10 | ESE 13 | ESE 12 | SE 15 | E 11 | SSW 10 | SW 9 | SSE 10 |
3 | 16 | 7 | 30 | 18 | 14 | 13 | 215 | 27 | 42 | 67 | 15 | 56 | 29 | 9 | 23 | 38 | 23 | 18 | |
Wind waves Height (m) Direction Period (s) | SW 3 | — | SSE 5 | — | — | SE 4 | — | — | — | SW 10 | — | — | — | — | SSE 9 | SSW 3 | SW 3 | SSW 4 | — |
2 | — | 7 | — | — | 3 | — | — | — | 59 | — | — | — | — | 141 | 7 | 2 | 9 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 67 | 53 | 68 | 68 | 73 | 0 | 0 | 41 | 68 | 0 | 67 | 67 | 0 | 24 | 0 | 0 | 68 | 68 | 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.











