
Surf Forecasts:
Hanamizu River surf forecast from 8 Aug 2026:
- Best quality surf: Monday 10 Aug, 12AM (local time) - 2ft (0.6m), 10s period, S swell with glassy winds.
- Most powerful swell: Tuesday 11 Aug, 6PM (local time) - 3ft (0.9m), 10s period, SSW swell with 155 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 12AM (local time) - 2ft (0.6m), 10s period with S 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 12AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.3m 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 0.9m 10s and forecast to arrive on Tuesday (Aug 11) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Thursday (Aug 13) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 10th Aug) | 2ft (0.6m) 10s |
| Best Surf | 12AM (Mon 10th Aug) | 2ft (0.6m) 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 folks, Rusty here. Let’s have a look at what Hanamizu River has in store for us over the next couple of weeks.
Right off the bat, I gotta be straight with you – this is a tough run of swell. We’re looking at a long stretch of small, weak energy and conditions that just aren’t playing ball. The first several days are a write-off for any proper surfing. From Sunday the 9th right through most of the following week, we’ve got tiny waves and mostly messy or poor conditions. The energy is way down, barely registering triple digits in the combined swell department, and the wind isn’t giving us a break for the most part.
The first real glimmer of something worth paddling out for shows up on the morning of Monday the 10th of August. It’s not a classic, but the glassy conditions late in the day are a nice change. We’re talking about 2 ft of SSW groundswell at 11 seconds. The combined energy is still low at 111, but that glassy surface is a major positive for a wave this small. For a beginner-friendly sandbar spot like this, that afternoon window is your best bet for a fun, easy paddle without the wind ruining it.
We then drop back into the doldrums for a solid week and a half. Clean cross-off winds pop up from the 13th and 14th, but the swell just isn't there – we’re down to 1 ft. Even with good wind, you can’t make waves out of nothing.
The standout event, and the only time this forecast gets interesting, arrives on Saturday the 22nd of August in the afternoon. A pulse of S swell pushes in at 4 ft with a 12-second period. The combined energy jumps to 351 – that’s a solid, moderate pulse of energy for this river mouth. The wind is light and cross-onshore, which is manageable. It’s not perfect, but after two weeks of nothing, this is the one window that offers a real, rideable wave. If you’ve been jonesing for a surf, mark that afternoon. It’s still a beginner-friendly setup, so the 4 ft is doable, just keep an eye on the tide.
Then it fades again into the final days of the window. It’s a long, flat run for Hanamizu. We’ll have to hope the forecasts change. That Saturday afternoon is your only real shot. Rusty out.
Short Range ForecastModerate rain (total 12mm), heaviest on Tue afternoon. Warm (max 29°C on Sun afternoon, min 23°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Wed night. Warm (max 31°C on Fri afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 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) | SSW 10 | SSW 10 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSE 11 | SSW 11 | SSW 11 | S 11 |
Wave Graph | |||||||||||||||||||||
112 | 115 | 77 | 62 | 93 | 59 | 62 | 64 | 58 | 60 | 63 | 59 | 39 | 38 | 17 | 16 | 16 | 40 | 40 | 39 | 64 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross-on | glassy | cross | glassy | cross-on | cross-on | cross | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:05PM1.31m | 00:49AM1.35m | 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 | ||||||||
Low Tide | 8:17PM1.17m | 8:52AM0.13m | 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 | ||||||||
4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | |
— | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | — | — | 1 | — | 1 | 1 | — | 3 | 6 | 3 | — | 5 | 5 | 1 | 1 | — | 3 | 6 | 9 | 4 | 6 |
Temp °C | 28 | 29 | 27 | 28 | 28 | 26 | 25 | 26 | 25 | 27 | 28 | 27 | 27 | 29 | 26 | 30 | 31 | 27 | 26 | 26 | 26 |
Feels °C | 31 | 32 | 30 | 31 | 31 | 26 | 27 | 27 | 28 | 27 | 29 | 29 | 26 | 28 | 27 | 30 | 32 | 29 | 27 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 10 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSE 11 | SSE 10 | SE 10 | S 11 |
112 | 115 | 77 | 62 | 93 | 59 | 62 | 64 | 58 | 60 | 63 | 59 | 39 | 38 | 17 | 16 | 16 | 40 | 39 | 37 | 64 | |
Swell 2 Height (m) Direction Period (s) | ESE 13 | ESE 13 | SW 12 | SW 12 | ESE 12 | ESE 11 | SE 12 | SE 12 | SE 13 | SE 13 | SE 10 | SSE 4 | SE 11 | SE 11 | SE 9 | S 12 | S 12 | SSW 9 | SSW 11 | SSW 11 | ESE 11 |
34 | 34 | 23 | 21 | 13 | 12 | 6 | 6 | 6 | 6 | 4 | 1 | 5 | 5 | 3 | 11 | 11 | 16 | 40 | 39 | 47 | |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | ESE 12 | ESE 12 | SE 11 | SE 11 | E 10 | E 11 | S 10 | SE 10 | SE 13 | SE 12 | — | E 8 | SE 11 | SE 11 | ESE 11 | SSW 11 | ESE 10 | S 9 | SSE 9 |
5 | 5 | 15 | 14 | 5 | 5 | 2 | 2 | 2 | 4 | 6 | 5 | — | 1 | 5 | 5 | 11 | 11 | 10 | 2 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 2 | SSW 4 | SE 3 | SSE 4 | — | NNE 3 | NNE 3 | NE 3 | NNE 3 | — | — | NE 3 | — | ENE 3 |
— | — | — | — | — | — | — | 2 | 4 | 2 | 3 | — | 5 | 6 | 2 | 3 | — | — | 2 | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 36 | 0 | 27 | 0 | 17 | 0 | 77 | 104 | 10 | 31 | 19 | 81 | 59 | 12 | 69 | 59 | 10 | 80 | 19 | 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.











