Surf Forecasts:
Sakawa River surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 19 Sep, 3PM (local time) - 8ft (2.5m), 13s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 9AM (local time) - 8ft (2.5m), 14s period, SE swell with 2,462 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 3AM (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 3AM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.3m and 7s. 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 14s and forecast to arrive on Saturday (Sep 19) at 9AM. 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 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 13th Sep) | 1.5ft (0.4m) 13s |
| Best Surf | 3PM (Sat 19th Sep) | 8ft (2.5m) 13s |
| Most Powerful | 9AM (Sat 19th Sep) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Sakawa River over the next 16 days.
The Lowdown
Righto, let’s have a look at the river mouth at Sakawa River. It’s a fairly consistent little spot that needs a sweet SE swell and a NW offshore to come alive. The first week is honestly a bit of a write-off, so don’t rush down there just yet. There’s a gap of almost no surf to bother with from now until the 19th of September. We’ve got tiny, weak waves and so-so winds, with the combined energy sitting in the weak range most days—like 67 (moderate wave energy) at best early on. The water temp is sitting at 81°, which is about average for this time of year, so no surprises there.
Things finally start looking interesting around Saturday the 19th of September. That’s the standout window. Saturday morning brings a solid 8 ft SE groundswell with a period of 14 seconds—long period, real groundswell—and the combined energy jumps to 2508 (strong wave energy). Winds are NNE cross-off at 12 mph, so the face will be clean. That’s a fair bit of punch for a river mouth though: 8 ft is expert territory. Saturday afternoon is the pick, with the same 8 ft SE swell, a period of 13 seconds, and the energy still cranking at 2199, but the wind drops to a light 6 mph cross-off. That’s pretty choice for experienced surfers looking for a heavy, lined-up river bank.
Sunday the 20th is still good but smaller, with 6 ft SE swell and light offshore winds in the morning. The energy is dialling back to 749 (moderate wave energy), still very surfable for stronger intermediates. Then we get a brief glassy window on Monday the 21st, with 4 ft SSW swell and glass conditions—that’ll be a fun, mellow morning for a paddle. After that, the end of the window gets messy again, with a big 10 ft pulse on Tuesday the 22nd but cross-shores chopping it up. Not worth the drive for that.
So, if you’re an experienced local, the standout is the afternoon of Saturday the 19th of September at Sakawa River. Clean, solid groundswell, light wind, and the river bank will be holding that SE swell well. Don’t miss it. Crowds are sometimes around, so expect a few others on it. For the rest of us, the glassy Monday morning the 21st is the easier call.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat morning. Warm (max 28°C on Mon morning, min 21°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Wed night. Warm (max 27°C on Tue morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 | ESE 14 | ESE 13 | ESE 13 | ESE 13 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SE 8 | ESE 8 | SE 17 | SE 15 | SE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 37 | 69 | 56 | 55 | 50 | 55 | 76 | 122 | 91 | 84 | 64 | 60 | 43 | 54 | 39 | 28 | 14 | 47 | 137 | 998 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross | cross | cross | cross-off | cross-on | glassy | cross | glassy | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:24PM1.50m | 5:40AM1.52m | 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 | ||||||||
Low Tide | 11:14AM0.34m | 11:29PM0.37m | 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 | ||||||||
 |  |  |  |  |  | | |  |  | | | |  | | | |  | | | | |
 | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — |
 | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | — | 5:46 | — |
mm | 2 | — | — | — | — | — | — | — | 2 | 1 | — | — | 1 | 2 | 3 | — | 1 | — | — | — | — |
Temp °C | 21 | 22 | 22 | 25 | 26 | 24 | 28 | 28 | 25 | 27 | 27 | 25 | 24 | 26 | 23 | 25 | 26 | 24 | 23 | 23 | 23 |
Feels °C | 23 | 24 | 24 | 28 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 28 | 27 | 30 | 26 | 26 | 27 | 25 | 22 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | S 7 | SSW 7 | ESE 13 | SE 8 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 7 | SE 8 | SE 8 | SE 8 | ESE 8 | SE 8 | SE 15 | SE 14 |
| kJ | 28 | 18 | 69 | 21 | 39 | 50 | 55 | 76 | 122 | 91 | 84 | 64 | 60 | 43 | 54 | 39 | 28 | 14 | 15 | 137 | 998 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SSW 7 | ESE 13 | ESE 13 | ESE 12 | E 12 | E 12 | E 12 | E 13 | E 13 | E 12 | E 13 | SE 9 | E 12 | E 12 | E 10 | SE 8 | SE 17 | ESE 8 | SE 8 |
| kJ | 24 | 23 | 9 | 56 | 55 | 29 | 25 | 11 | 12 | 13 | 12 | 11 | 3 | 13 | 3 | 3 | 2 | 9 | 47 | 25 | 58 |
Swell 3 Height (m) Direction Period (s) | E 14 | ESE 14 | — | SSW 7 | SSW 7 | S 7 | S 7 | E 15 | S 7 | E 16 | S 7 | E 14 | E 11 | E 13 | S 7 | — | S 9 | SE 9 | SE 8 | S 12 | SE 18 |
| kJ | 15 | 37 | — | 9 | 5 | 1 | 1 | 4 | 1 | 5 | 1 | 4 | 2 | 3 | 1 | — | 1 | 3 | 3 | 3 | 323 |
Wind waves Height (m) Direction Period (s) | NNE 3 | NE 3 | NNE 3 | NE 3 | — | SW 2 | — | S 4 | SW 3 | — | SSW 3 | — | ENE 2 | — | ENE 2 | NE 3 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 |
| kJ | 3 | 2 | 2 | 1 | — | 1 | — | 10 | 4 | — | 1 | — | 1 | — | 1 | 6 | 18 | 28 | 39 | 50 | 29 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 82 | 82 | 73 | 0 | 53 | 0 | 68 | 68 | 67 | 0 | 67 | 50 | 73 | 108 | 58 | 73 | 111 | 433 | 191 | 433 | 450 |
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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