
Surf Forecasts:
Hanamizu River surf forecast from 7 Aug 2026:
- Best quality surf: Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 10s period, S swell with glassy winds.
- Most powerful swell: Saturday 8 Aug, 12AM (local time) - 4.5ft (1.4m), 11s period, S swell with 485 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 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 Sunday (Aug 09) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.4m 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 1.4m 11s and forecast to arrive on Saturday (Aug 08) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Aug 14) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 9th Aug) | 2.5ft (0.8m) 10s |
| Best Surf | 3AM (Sun 9th Aug) | 2.5ft (0.8m) 10s |
| Most Powerful | 12AM (Sat 8th Aug) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s cookin’ for Hanamizu River.
Honestly, mate, it’s a pretty grim stretch ahead. We’re lookin’ at a long, long dry spell with barely a ripple worth paddlin’ for. The first solid chance of anything even close to surfable doesn’t show up until Tuesday the 11th of August, and even then, it’s barely a whisper.
The water temp is sittin’ right on 80°, which is totally normal for this time of year, so no surprises there.
The one and only spot worth mentionin’ is Hanamizu River itself. It’s a beach-and-sandbar setup, exposed to the south-east swell, but it’s a beginner-friendly wave when it’s workin’. The problem is, it’s barely workin’ at all for most of this forecast.
The first real glimmer comes Tuesday morning, the 11th of August. We’ve got a tiny 2 ft swell from the SSW, with a period of 11 seconds – that’s a long-period groundswell, so the shape could be there, but it’s tiny. The wind is light and cross-offshore, which means it’ll be clean. The combined energy is a weak 77, so we’re talkin’ knee-high dribblers at best. Crowds are sometimes a problem here, but on a day like this, you’ll probably have it to yourself. It’s surfable, but just barely.
Then Wednesday the 12th of August, the afternoon session looks a touch better. The swell is still puny at 2 ft, but the wind swings offshore from the WNW at 6 mph, givin’ us clean, glassy lines. The energy is a weak 210, so again, nothin’ to write home about, but if you’re desperate, it’s the best you’ll get.
After that, it’s all downhill. From the 13th of August right through to the end of the 22nd, we’re lookin’ at swell dropping below 2 ft, weak energy, and mostly cross-onshore or onshore winds. There’s a moment on Tuesday the 18th of August, morning, where the wind goes glassy, but the swell is a pathetic 1.0 ft with only 25 energy – that’s flat.
So, the honest truth? There’s one or two small windows for a longboard or a foiler if you’re really keen, around Tuesday the 11th and Wednesday the 12th. But for a proper surf, this is a blank run. It’s just one of those stretches for the area. Forecasts can change, but for now, I’d be takin’ the dog for a walk instead.
Stay salty,
Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Fri afternoon, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 26mm), heaviest during Tue night. Warm (max 29°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 12 | S 11 | S 11 | S 11 | SSW 11 | SSW 10 | S 10 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 11 | SSW 11 | S 6 | SSW 11 | ESE 6 | SSW 10 | SSW 10 | SSW 10 | SSW 10 |
Wave Graph | ||||||||||||||||||||
625 | 485 | 307 | 242 | 191 | 112 | 78 | 75 | 86 | 91 | 59 | 64 | 206 | 77 | 121 | 91 | 35 | 82 | 58 | 56 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | glassy | cross | cross-on | glassy | cross-off | cross | cross | cross-off | off | cross-off | cross-off | cross | cross-off |
High Tide | 9:50PM1.36m | 3:24PM1.19m | 11:07PM1.33m | 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 | ||||||||
Low Tide | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 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 | |||||||
— | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | |
6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 17 | 5 | 3 | — | — | 2 | 12 |
Temp °C | 29 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 28 | 27 | 25 | 25 | 25 | 25 | 28 | 31 | 26 |
Feels °C | 31 | 30 | 30 | 30 | 29 | 30 | 28 | 28 | 30 | 31 | 28 | 30 | 28 | 26 | 25 | 26 | 26 | 29 | 32 | 28 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 11 | S 11 | S 11 | SSW 11 | SSW 10 | S 10 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 11 | SW 12 | SSW 11 | SSW 11 | SE 6 | SSE 6 | SSW 10 | SSW 10 | SSW 10 |
625 | 485 | 307 | 242 | 191 | 112 | 78 | 75 | 86 | 91 | 59 | 64 | 6 | 66 | 121 | 25 | 10 | 82 | 58 | 56 | |
Swell 2 Height (m) Direction Period (s) | ESE 9 | SE 12 | ESE 11 | ESE 12 | ESE 12 | ESE 13 | ESE 13 | SW 12 | SW 12 | ESE 12 | S 3 | SW 12 | SE 12 | SE 13 | SE 10 | SSW 11 | SSW 10 | SE 9 | SE 12 | SSE 12 |
139 | 6 | 11 | 13 | 28 | 34 | 34 | 23 | 23 | 13 | 1 | 6 | 6 | 6 | 4 | 91 | 35 | 3 | 5 | 13 | |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | SE 12 | SE 12 | ESE 15 | SE 12 | SW 12 | ESE 12 | ESE 12 | SW 12 | SW 12 | SE 12 | S 10 | E 10 | SE 13 | SE 12 | SW 11 | SE 12 | — | E 11 |
4 | 4 | 6 | 6 | 21 | 5 | 6 | 14 | 14 | 6 | 6 | 6 | 2 | 2 | 7 | 6 | 20 | 5 | — | 2 | |
Wind waves Height (m) Direction Period (s) | — | — | — | S 3 | — | — | — | — | — | — | — | SSW 3 | SSW 11 | S 6 | ESE 4 | ESE 6 | — | NNE 3 | — | — |
— | — | — | 2 | — | — | — | — | — | — | — | 1 | 206 | 77 | 23 | 88 | — | 3 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 36 | 62 | 43 | 465 | 13 | 19 | 36 | 0 | 10 | 13 | 10 | 0 | 119 | 77 | 17 | 0 | 10 | 19 | 59 | 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.











