Surf Forecasts:
Sakawa River surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 6PM (local time) - 8ft (2.4m), 9s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 9AM (local time) - 8ft (2.5m), 9s period, S swell with 943 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 6PM (local time) - 8ft (2.4m), 9s 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 Wednesday (Sep 09) at 6PM. The primary swell is predicted to be 2.4m and 9s period with a secondary swell of 1.9m and 9s. Another secondary swell of 0.4m and 10s is also forecast. 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 2.5m 9s and forecast to arrive on Wednesday (Sep 09) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 10) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 9th Sep) | 8ft (2.4m) 9s |
| Best Surf | 6PM (Wed 9th Sep) | 8ft (2.4m) 9s |
| Most Powerful | 9AM (Wed 9th Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gonna be a quiet stretch for the most part, but there's a glimmer of something special way out there. Let's get into it.
Right now, the surf is a bit of a non-event. We've got a few days of small, poor waves and dodgy conditions. The first real shot of something ridable doesn't come around until Monday the 15th of September. That morning at the Sakawa River sees a tiny 2.6ft south-east swell, but the wind is dead calm and glassy. Makes for a clean, if small, session. The energy is weak (106), so don't expect much push.
The action really picks up after a long lull. The standout of the whole forecast is the window from Monday the 21st of September through to Wednesday the 23rd. This is where the magic happens. The swell starts to build properly from the south-southwest, and the winds are looking unreal. On the morning of the 21st, we've got a 3ft south swell with a 13-second period, clean with glassy conditions. The energy is ramping up (283) and it's a groundswell which will wrap nicely into the river mouth.
But the real gem is Tuesday the 22nd and Wednesday the 23rd. Tuesday afternoon sees a 3.6ft south swell, glassy as a mirror, with a 15-second period and good energy (598). Then Wednesday morning peaks with a 4.6ft swell from the south-southwest, combined energy of 800, and glassy conditions. The water is a warm 82°, which is a touch warmer than normal for this time of year. This is a long-period groundswell, so it'll be a bit more lined up and powerful on the river bank, with longer waits between sets. It's not a wave for beginners, but for the experienced crew, this is the best we've got.
After that, it gets a bit tricky. Thursday the 24th jumps up to 5.6ft to 5.9ft from the south-southwest, still with a long 15-second period, but the wind switches to a cross-offshore breeze from the north-northeast, which will keep things clean. It's a lot of water (combined energy 1566), so this is expert territory only. It could be a bit of a beast on the river mouth.
So, to sum it up: don't waste your petrol on the next week. The time to be on the water is the morning of the 21st through to the 23rd. The 22nd and 23rd are the absolute standouts with glassy conditions and proper, long-period groundswell. It's a long way out, so keep an eye on it, but it's looking like a real treat.
Short Range ForecastHeavy rain (total 53mm), heaviest during Wed night. Warm (max 28°C on Wed morning, min 20°C on Thu afternoon). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 21°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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 9 | SSW 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 7 | S 8 | SE 10 | ESE 14 | ESE 13 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 943 | 781 | 342 | 138 | 84 | 61 | 55 | 53 | 41 | 28 | 37 | 68 | 41 | 62 | 75 | 84 | 118 | 91 | 88 | 86 | 73 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | glassy | cross-on | cross | cross-off | glassy | cross | cross-off |
High Tide | 4:25PM1.43m | 3:26AM1.47m | 4:45PM1.46m | 4:15AM1.53m | 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 | ||||||||
Low Tide | 9:30AM0.17m | 9:53PM0.79m | 10:09AM0.18m | 10:25PM0.63m | 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 | |||||||
 |  |  |  |  |  |  | |  | | |  | |  |  | | |  |  | | | |
 | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — |
mm | — | 3 | 20 | — | 18 | 7 | 1 | 3 | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 |
Temp °C | 28 | 28 | 22 | 21 | 20 | 20 | 20 | 20 | 21 | 22 | 23 | 23 | 25 | 27 | 25 | 27 | 25 | 24 | 26 | 25 | 24 |
Feels °C | 31 | 31 | 22 | 21 | 21 | 21 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 30 | 30 | 29 | 27 | 26 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 7 | S 8 | S 7 | SE 10 | ESE 13 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 9 |
| kJ | 607 | 561 | 342 | 138 | 84 | 61 | 55 | 53 | 41 | 28 | 23 | 68 | 41 | 62 | 75 | 84 | 118 | 91 | 88 | 86 | 73 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | SE 11 | ESE 11 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 10 | SE 10 | SSW 7 | SSW 7 | E 13 | E 13 | E 12 | E 12 | E 12 | E 13 | E 13 | E 13 | E 12 |
| kJ | 10 | 10 | 5 | 11 | 11 | 9 | 9 | 14 | 25 | 24 | 18 | 9 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | SE 12 | E 16 | SE 9 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | ESE 14 | ESE 3 | SSW 7 | SSW 7 | S 7 | SW 7 | S 7 | S 7 | E 16 | S 9 | E 14 |
| kJ | 6 | 5 | 3 | 4 | 17 | 16 | 16 | 16 | 14 | 15 | 37 | 1 | 5 | 5 | 1 | 2 | 1 | 1 | 5 | 2 | 4 |
Wind waves Height (m) Direction Period (s) | S 9 | SSW 9 | NNE 4 | NE 4 | NE 4 | NE 4 | NE 3 | NE 3 | NE 3 | NE 3 | NE 3 | NE 2 | NE 3 | — | — | — | SW 3 | WSW 2 | — | — | SSW 3 |
| kJ | 943 | 781 | 19 | 20 | 20 | 11 | 2 | 2 | 6 | 5 | 2 | 1 | 3 | — | — | — | 2 | 1 | — | — | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 454 | 159 | 108 | 30 | 0 | 0 | 73 | 73 | 0 | 73 | 73 | 73 | 73 | 50 | 0 | 68 | 67 | 0 | 0 | 67 | 0 |
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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