
Surf Forecasts:
Hanamizu River surf forecast from 9 Aug 2026:
- Best quality surf: Monday 10 Aug, 3PM (local time) - 2ft (0.6m), 11s period, SSW swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 3PM (local time) - 2ft (0.6m), 11s period, SSW swell with 93 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 3PM (local time) - 2ft (0.6m), 11s 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 Monday (Aug 10) at 3PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.2m and 12s. 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 0.6m 11s and forecast to arrive on Monday (Aug 10) at 3PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Aug 17) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Mon 10th Aug) | 2ft (0.6m) 11s |
| Best Surf | 3PM (Mon 10th Aug) | 2ft (0.6m) 11s |
| Most Powerful | 3PM (Mon 10th Aug) | 2ft (0.6m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Hey, Rusty here. Let’s have a look at what’s coming down the line for the next couple weeks. It’s a quiet patch, so don’t get your hopes up too high.
The only break in the mix is Hanamizu River (a beach/sandbar setup). It’s fairly consistent for the area, but the surf quality is pretty lackluster for most of the period. The forecast starts with small, weak swell and very ordinary conditions. From Monday 10 August through Wednesday 12 August, there’s the most consistent but still tiny surf – waves around 2 ft from the SSW with a long 11-second period. That long period can make the waves break a bit straight on a beach/sandbar, but it’ll hold some shape. The best windows are Monday afternoon (10 August) with glassy conditions and a 2 ft SSW swell, and Tuesday morning (11 August) with glassy winds again. These are the cleanest moments, but the waves are small. The combined swell energy is weak, ranging from 67 to 111 – not much power behind it.
Water temp is 81° with a +0.7° anomaly, so pretty normal for the time of year – nothing unusual.
From Thursday 13 August through Monday 24 August, it’s a long dry spell with hardly anything worth paddling for. Wave heights drop to 1 ft–1 ft, combined energy falls into the low double digits (as low as 17), and the wind is often cross-off or cross-on, making it messy. Conditions are labeled “poor surf conditions” throughout. Crowds are listed as “sometimes,” so you’ll probably have the place to yourself, but it’s barely rideable.
The only other moment of interest is Tuesday 25 August. The morning brings a 1 ft SSE swell with a very long 13-second period and glassy wind – clean but tiny. Then the afternoon shows a jump: 3 ft from the SSE with a 12-second period and combined energy hitting 206 (moderate energy). That’s the biggest pulse of the whole forecast. The catch is the wind turns cross-onshore, so it won’t be clean. Still, it’s the one standout in an otherwise flat run – worth a look if you’re keen, but don’t expect perfection.
So, bottom line: the first few days (10–12 August) have the best windows for clean but tiny waves. The rest is a near-blank run until the 25th, which offers a small bump in size but messy wind. For a beach/sandbar in this area, this kind of quiet stretch is pretty normal. Forecasts can change, so keep an eye on it, but for now, it’s a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 34mm), heaviest during Tue night. Warm (max 29°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 32mm), heaviest during Sat night. Warm (max 30°C on Fri afternoon, min 22°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | S 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SSW 11 | S 12 | SSW 10 | SSW 10 | SE 11 |
Wave Graph | |||||||||||||||||||||
62 | 93 | 58 | 63 | 64 | 58 | 58 | 59 | 51 | 38 | 38 | 33 | 28 | 28 | 16 | 40 | 38 | 70 | 62 | 55 | 29 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross | glassy | cross-off | cross-on | glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy |
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 | ||||||||
4:56 | — | — | 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 | — | 1 | — | — | 4 | 26 | 3 | — | — | — | 3 | 1 | — | 3 | 6 | 4 | 3 | 12 | — | — | 10 |
Temp °C | 29 | 28 | 26 | 27 | 26 | 24 | 24 | 25 | 25 | 28 | 28 | 26 | 29 | 30 | 27 | 27 | 26 | 24 | 27 | 26 | 24 |
Feels °C | 31 | 32 | 26 | 27 | 28 | 26 | 26 | 26 | 25 | 28 | 28 | 28 | 30 | 33 | 29 | 27 | 26 | 23 | 24 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | S 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SSW 11 | S 12 | SSW 10 | SSW 10 | SSW 9 |
62 | 93 | 58 | 63 | 64 | 58 | 58 | 59 | 51 | 38 | 38 | 33 | 28 | 28 | 16 | 40 | 38 | 70 | 62 | 55 | 28 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | ESE 12 | ESE 11 | E 11 | E 12 | SE 13 | SSE 4 | SSE 4 | SE 12 | S 5 | E 10 | SE 12 | SSE 11 | SSE 11 | SSE 10 | SSE 8 | SSE 8 | SE 8 | SE 12 | SE 11 | SE 11 |
21 | 13 | 11 | 2 | 3 | 6 | 5 | 3 | 5 | 2 | 7 | 5 | 13 | 12 | 9 | 14 | 7 | 11 | 35 | 31 | 29 | |
Swell 3 Height (m) Direction Period (s) | ESE 12 | SE 11 | SW 11 | SE 13 | SE 13 | E 11 | SE 13 | SE 12 | SSE 11 | E 10 | SE 12 | E 9 | E 10 | E 11 | E 10 | E 10 | SE 10 | SE 12 | E 10 | E 10 | E 10 |
14 | 5 | 5 | 6 | 6 | 2 | 6 | 5 | 12 | 2 | 5 | 2 | 2 | 2 | 2 | 2 | 4 | 6 | 2 | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | — | — | NE 2 | NNE 3 | SW 2 | SSW 3 | — | — | — | NNE 2 | — | — | NNE 3 | NE 3 | NE 3 | NNE 3 | NNE 3 | NNE 3 | — | N 3 | N 3 |
— | — | 1 | 2 | 1 | 1 | — | — | — | 1 | — | — | 3 | 2 | 9 | 7 | 4 | 4 | — | 1 | 6 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 0 | 19 | 0 | 0 | 461 | 0 | 0 | 0 | 80 | 27 | 12 | 12 | 59 | 12 | 123 | 465 | 123 | 112 | 3 | 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.











