Surf Forecasts:
Sakawa River surf forecast from 30 Aug 2026:
- Best quality surf: Sunday 6 Sep, 3AM (local time) - 4.5ft (1.3m), 15s period, S swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 3PM (local time) - 5ft (1.5m), 15s period, S swell with 957 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 3AM (local time) - 1.5ft (0.5m), 12s period with E 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 Tuesday (Sep 01) at 3AM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.3m and 8s. Another secondary swell of 0.3m and 3s 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 1.5m 15s and forecast to arrive on Sunday (Sep 06) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Sep 06) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 1st Sep) | 1.5ft (0.5m) 12s |
| Best Surf | 3AM (Sun 6th Sep) | 4.5ft (1.3m) 15s |
| Most Powerful | 3PM (Sun 6th Sep) | 5ft (1.5m) 15s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about the Sakawa River in feet and miles. Water temp is about 82°, pretty normal for this time of year.
It’s a slow start. From Sunday the 30th of August through the first week of September, the swell is tiny, barely 2 feet, and the wind is all over the place. The energy is weak, nothing worth paddling for. You’re looking at a solid week of flatness.
The first real action shows up on Sunday the 6th of September. A SSW groundswell rolls in with a 14-second period and about 5 feet of swell. The energy is moderate (828), and we get a clean cross-off wind from the north at about 9 mph. The river mouth should handle that long-period swell nicely. The afternoon pushes it to 5 feet with a 15-second period, and the energy is strong (1028). This is the start of the good stuff.
The standout is Monday the 7th of September. Morning brings 6 feet of S swell, 14-second period, and the energy is pumping at 1150 (strong). The wind is a clean cross-off from the NNE at 9 mph. That’s your best wave of the forecast. It’s a bit much for beginners, but for everyone else, it’s a winner.
Then Thursday the 10th of September is another solid day. Both sessions show about 5 feet of SSE swell, 12-second period, and energy between 696 and 818. The wind is again clean cross-off from the NNE at 9 mph. The morning is glassy and clean. Friday the 11th morning is also a pick, with 6 feet and 12-second period, light cross-off wind, and energy at 881.
After that, it’s back to small, weak, and choppy. The 12th through the 14th are not worth your time.
Best bet: Monday the 7th of September morning, then Thursday the 10th and Friday the 11th mornings. Get out there.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue morning, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Fri afternoon. Warm (max 29°C on Wed morning, min 23°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 10 | SE 10 | SE 10 | SE 10 | ESE 14 | ESE 13 | E 12 | E 12 | E 11 | ESE 10 | SE 6 | SE 7 | SE 7 | SSE 7 | SE 7 | SE 6 | SE 7 | SE 7 | SE 6 | S 17 | S 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 25 | 18 | 16 | 19 | 36 | 56 | 73 | 72 | 64 | 86 | 60 | 73 | 93 | 115 | 44 | 27 | 36 | 36 | 20 | 140 | 582 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | glassy | cross | on | cross | cross | cross-on | glassy | on | cross-on | glassy | cross-on | cross | cross-off | glassy | glassy | cross-off | cross | cross | cross-off |
High Tide | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | 6:56AM1.41m | 6:47PM1.51m | 7:44AM1.31m | 7:09PM1.49m | 8:44AM1.20m | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | 8:45PM1.32m | |||||||||
Low Tide | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | 12:44PM0.57m | 1:22AM0.32m | 1:11PM0.72m | 2:06AM0.32m | 1:35PM0.87m | 3:03AM0.35m | 1:53PM1.01m | 4:23AM0.38m | |||||||||
 | |  | | | |  | |  | | | | | | | |  |  |  | |  | |
 | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — |
 | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 3 | 1 | 2 | 17 |
Temp °C | 24 | 25 | 25 | 27 | 28 | 25 | 29 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 25 | 23 | 22 | 21 |
Feels °C | 27 | 28 | 29 | 30 | 31 | 28 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 30 | 31 | 33 | 35 | 28 | 24 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SE 10 | SE 9 | ESE 13 | E 12 | E 12 | E 11 | ESE 10 | ESE 7 | SE 7 | SE 7 | SE 10 | SE 7 | SE 6 | SE 7 | SE 7 | SE 6 | SE 7 | S 16 |
| kJ | 18 | 18 | 10 | 15 | 14 | 56 | 73 | 72 | 64 | 86 | 35 | 73 | 88 | 15 | 44 | 27 | 36 | 36 | 20 | 36 | 582 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SSW 7 | SSW 7 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | ESE 10 | S 6 | SSW 6 | SSW 6 | SE 9 | SE 9 | S 17 | SE 8 |
| kJ | 25 | 16 | 16 | 10 | 11 | 15 | 14 | 14 | 14 | 22 | 22 | 22 | 24 | 9 | 20 | 11 | 13 | 12 | 12 | 140 | 24 |
Swell 3 Height (m) Direction Period (s) | E 11 | SE 9 | E 5 | ESE 14 | ESE 14 | ESE 5 | SSE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 11 | ESE 10 | SW 12 | SE 10 | SE 9 | SE 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 |
| kJ | 2 | 3 | 1 | 19 | 36 | 5 | 10 | 16 | 16 | 17 | 33 | 37 | 18 | 5 | 15 | 13 | 12 | 8 | 7 | 15 | 7 |
Wind waves Height (m) Direction Period (s) | NE 3 | — | — | — | ENE 2 | — | NE 3 | — | — | — | SE 6 | — | SSE 6 | SSE 7 | WSW 3 | — | NE 3 | — | — | SSW 9 | NNE 4 |
| kJ | 1 | — | — | — | 1 | — | 2 | — | — | — | 60 | — | 93 | 115 | 1 | — | 1 | — | — | 58 | 21 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 82 | 50 | 90 | 111 | 58 | 82 | 82 | 58 | 0 | 50 | 58 | 0 | 68 | 481 | 68 | 53 | 68 | 67 | 66 | 111 | 111 |
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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