
Surf Forecasts:
Hanamizu River surf forecast from 10 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 9AM (local time) - 1.5ft (0.5m), 10s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 11 Aug, 6PM (local time) - 3ft (0.9m), 10s period, SSW swell with 170 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 9AM (local time) - 1.5ft (0.5m), 10s period with SSW swell.
Best Forecast Surf Conditions for Hanamizu River this week:
The surf forecast for Hanamizu River over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 9AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.1m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 0.9m 10s and forecast to arrive on Tuesday (Aug 11) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 11) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Tue 11th Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 9AM (Tue 11th Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 6PM (Tue 11th Aug) | 3ft (0.9m) 10s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright lads, Rusty here. Let’s get into what’s cooking at Hanamizu River for the next couple of weeks.
I’m not gonna sugarcoat it – it’s a long, quiet stretch. The first week is pretty much a write-off, and the second week isn’t much better. We’re looking at a real slow period, with a few windows of tiny, clean waves that might give you a fun little glide, but there’s nothing to get excited about.
The first real chance is Monday, the 10th of August. The afternoon has a tiny 2ft SSW swell, with an 11-second period, giving it a bit of life. The combined energy is moderate (111). The wind is glassy out of the ESE, so the surface will be like a mirror. Water temp is a warm 82°F, which is about average for this time of year. It’s surfable, but real ordinary – you’ll want a longboard, just for the feel of it.
Tuesday morning the 11th is even smaller, 2ft SSW, but still glassy. The energy drops off (67). It’s more of the same: a bit of a knee-slapper.
Then we hit a dry patch. From Tuesday afternoon all the way through to Sunday, the 25th of August, the numbers are grim. Tiny swells, 1ft to 2ft, with poor ratings. The wind is mostly cross-off or cross-on, and the energy is weak – often below 100. It’s just not doing a thing. For a spot like this, a blank run like this is pretty normal, so don’t let it get you down.
There’s a little blip on Wednesday the 12th, with a morning pulse of 4ft SE swell, but the period is a short 6 seconds, which is just wind chop. The energy is moderate (172), but the wind is cross-off, making it clean. Still, at that size with a short period, it’s not going to be a quality wave. It’s also a bit punchy for a beginner-friendly spot.
The only other tiny glimmer comes right at the end of the forecast. Monday the 25th of August, we see a bit of push. The morning is glassy with a 2ft SE swell, 10-second period, and the energy is moderate (64). The afternoon bumps up slightly to 2ft from the SSE, with a 10-second period, and energy at 94. It’s still small, but if the wind holds, you might get a few clean little runners.
So, the best of the bunch is that Monday the 10th afternoon and Tuesday the 11th morning for the glassy conditions, and the very end of the run on the 25th. But don’t go planning a trip around it. It’s a longboard-only affair for the next two weeks.
Rusty.
Short Range ForecastHeavy rain (total 53mm), heaviest during Tue night. Warm (max 28°C on Mon afternoon, min 21°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 71mm), heaviest during Fri night. Warm (max 29°C on Fri morning, min 23°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 5 | SE 6 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SE 10 | SSW 11 | SSW 11 | SSW 10 | S 10 | SSW 10 | SSW 9 |
Wave Graph | ||||||||||||||||||||
93 | 59 | 59 | 64 | 91 | 77 | 41 | 39 | 38 | 31 | 28 | 28 | 28 | 28 | 25 | 40 | 32 | 52 | 31 | 29 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | glassy | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | 3:16AM1.49m | 5:31PM1.47m | 4:10AM1.55m | 5:55PM1.48m | 4:59AM1.57m | 6:17PM1.48m | 5:45AM1.54m | 6:38PM1.48m | 6:30AM1.47m | 6:58PM1.47m | |||||||
Low Tide | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | 10:28AM0.00m | 10:44PM0.87m | 11:08AM0.03m | 11:20PM0.74m | 11:43AM0.11m | 11:56PM0.62m | 12:15PM0.24m | 00:33AM0.52m | 12:43PM0.39m | 1:10AM0.46m | |||||||
— | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | |
6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:30 | — | |
mm | — | — | — | 4 | 44 | 4 | 1 | — | — | 2 | 1 | — | 6 | 44 | 14 | 4 | — | — | — | 4 |
Temp °C | 28 | 26 | 27 | 25 | 23 | 22 | 25 | 24 | 28 | 28 | 26 | 29 | 29 | 26 | 27 | 26 | 24 | 26 | 27 | 25 |
Feels °C | 31 | 26 | 27 | 27 | 26 | 22 | 26 | 25 | 29 | 30 | 28 | 30 | 31 | 28 | 27 | 27 | 23 | 24 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SE 13 | SSE 5 | SSE 6 | S 6 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SSW 10 | S 10 | SSW 10 | SSW 9 |
93 | 59 | 59 | 64 | 6 | 31 | 25 | 15 | 38 | 31 | 28 | 28 | 28 | 28 | 15 | 40 | 32 | 52 | 31 | 29 | |
Swell 2 Height (m) Direction Period (s) | ESE 12 | ESE 11 | E 11 | E 11 | E 11 | SSW 10 | SSW 10 | SSW 10 | S 5 | SE 11 | SE 12 | SSE 12 | SSE 11 | SE 10 | SSW 11 | SSE 8 | SE 10 | SE 12 | SE 11 | ESE 10 |
13 | 11 | 2 | 2 | 2 | 58 | 41 | 39 | 2 | 5 | 5 | 13 | 23 | 24 | 25 | 7 | 16 | 35 | 19 | 10 | |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 12 | SE 13 | S 10 | SE 13 | SE 12 | SE 12 | SE 11 | E 10 | E 9 | E 10 | SE 10 | E 11 | SSE 8 | ESE 10 | SSW 12 | ESE 11 | ESE 11 | SSE 11 |
5 | 5 | 6 | 6 | 2 | 6 | 6 | 5 | 5 | 2 | 2 | 8 | 4 | 2 | 6 | 10 | 29 | 11 | 11 | 12 | |
Wind waves Height (m) Direction Period (s) | — | NE 2 | NNE 3 | SW 3 | SSW 5 | SE 6 | — | — | N 2 | — | — | — | — | — | — | E 2 | NE 3 | NE 3 | ENE 2 | ENE 2 |
— | 1 | 1 | 2 | 91 | 77 | — | — | 1 | — | — | — | — | — | — | 1 | 2 | 3 | 1 | 1 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 59 | 0 | 3 | 112 | 10 | 0 | 10 | 59 | 59 | 12 | 69 | 59 | 12 | 12 | 465 | 123 | 112 | 12 | 12 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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Information about the Hanamizu River Surf forecast
The above surf forecast table for Hanamizu River provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hanamizu River can be found by selecting the local surf guide option on the grey menu. Our Hanamizu 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 (Hanamizu 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 Hanamizu 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.
Hanamizu River is 1 km (1 miles) from Ninomiya. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Ninomiya. Ninomiya has rooms for a wide range of budgets as well as car hire and transport links.











