
Surf Forecasts:
Hanamizu River surf forecast from 10 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 6PM (local time) - 2.5ft (0.7m), 8s period, S swell with 65 kJ wave energy.
Best Forecast Surf Conditions for Hanamizu River this week:
The most powerful waves expected at Hanamizu River in the next 16 days are 0.7m 8s and forecast to arrive on Thursday (Sep 10) 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 0.4m 3s period and expected on Thursday (Sep 10) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Thu 10th Sep) | 2.5ft (0.7m) 8s |
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 cookin’ over the next couple of weeks. Gotta be honest, this one’s a slow burner. The first week and a half is pretty much a write-off for any kind of decent surf. We’re lookin’ at tiny, weak swell and mostly poor conditions. From Thursday the 10th through to Thursday the 17th, every session is flagged as poor. It’s a real flat spell, so don’t rush down there with your board just yet.
Water temp is runnin’ a touch warmer than normal for this time of year, coming in at 82°F, so at least you won’t be freezin’ while you’re starin’ at flat water.
Now, things start to get interesting come Friday the 18th of September. We see a jump in swell, but it’s only a marginal call with questionable tide. Not the day to get excited. The real standout window opens on Saturday the 19th of September. It’s still over a week away, so keep that in mind, but the forecast is promising. Hanamizu River is a beach/sandbar setup, and the swell direction (SSE) is lining up with what it likes (SE). Saturday morning we’re lookin’ at a solid 6ft swell from the SSE, with a long period of 15 seconds – that’s proper groundswell energy (combined energy of 1692). And the wind? Glassy. That’s the dream team for clean waves. It’s a bit much for beginners – over 5ft – but for anyone with a bit of experience, this is the call. The afternoon holds similar size at 7ft and glassy conditions. Crowds are listed as sometimes, so you might have some company.
Sunday the 20th keeps the quality high. Morning starts with a 7ft swell from the S, still with that lovely 15-second period and glassy, calm winds (combined energy of 2226). The afternoon gets a touch of cross-on wind, so the morning is the better window. This swell is getting up there in size for this break, so it’s one for the experienced crew.
Monday the 21st looks like the absolute peak. The swell is 8ft from the SSW with a very long period of 16 seconds, and combined energy is through the roof at 3529. Both morning and afternoon are glassy. That’s big, clean, powerful groundswell. This is only for expert surfers; 8ft is no joke, especially at a beach/sandbar where a long-period swell can close out. It’ll be better if there’s a defined channel, but the quality of the conditions is undeniable.
Tuesday the 22nd pushes into giant territory. The swell is predicted at 13ft to 16ft. Even with glassy conditions, that’s too big for Hanamizu River to handle properly. The forecast even says so. Give that one a miss.
After that, the swell drops off fast. Wednesday the 23rd gets messy with strong stormy winds, and we’re back to tiny, ordinary waves from Thursday the 24th onwards. So your window is clear – if you can wait, point your car at Hanamizu River for the 19th, 20th, or 21st of September. Sunday the 20th morning looks like the sweet spot for a classic, clean session with plenty of push behind it.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Fri afternoon. Warm (max 22°C on Sat night, min 19°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue morning. Warm (max 28°C on Mon afternoon, min 23°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 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 8 | S 8 | S 8 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | SSE 9 | SE 10 | SE 9 | SE 8 | S 8 | SE 8 | SSE 6 | SSE 8 | SE 8 |
Wave Graph | |||||||||||||||||||||
143 | 68 | 45 | 28 | 28 | 19 | 19 | 11 | 5 | 12 | 15 | 18 | 29 | 32 | 27 | 23 | 31 | 10 | 15 | 27 | 17 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-on | cross-on | cross | glassy | cross-on | cross-off | cross-off | cross | cross-off |
High Tide | 4:45PM1.46m | 4:15AM1.53m | 5:05PM1.49m | 4:59AM1.54m | 5:24PM1.50m | 5:40AM1.52m | 5:42PM1.51m | 6:20AM1.46m | 6:01PM1.51m | 6:59AM1.37m | 6:20PM1.49m | 7:40AM1.27m | 6:38PM1.46m | ||||||||
Low Tide | 10:09AM0.18m | 10:26PM0.63m | 10:43AM0.24m | 10:57PM0.49m | 11:14AM0.34m | 11:29PM0.37m | 11:42AM0.46m | 00:01AM0.29m | 12:07PM0.58m | 00:34AM0.27m | 12:29PM0.71m | 1:07AM0.28m | 12:48PM0.82m | 1:43AM0.34m | |||||||
5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | |
— | 5:58 | — | — | 5:57 | — | — | 5:54 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | |
mm | 2 | 1 | 2 | 7 | 9 | 3 | 1 | — | — | — | — | — | — | — | — | 4 | — | — | — | 1 | 8 |
Temp °C | 20 | 21 | 20 | 19 | 20 | 20 | 20 | 21 | 22 | 25 | 25 | 25 | 27 | 28 | 26 | 23 | 25 | 24 | 25 | 25 | 23 |
Feels °C | 18 | 20 | 20 | 21 | 21 | 21 | 20 | 21 | 23 | 28 | 27 | 29 | 29 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | SSE 9 | SE 10 | SE 9 | SE 8 | S 7 | SSE 7 | SSE 6 | SSE 8 | SE 8 |
143 | 68 | 45 | 28 | 28 | 19 | 19 | 11 | 5 | 12 | 15 | 18 | 29 | 32 | 27 | 23 | 1 | 9 | 15 | 27 | 17 | |
Swell 2 Height (m) Direction Period (s) | — | ESE 9 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SSW 7 | SSW 7 | SW 7 | S 7 | E 12 | E 14 | S 7 | — | SE 8 | SSE 9 | E 13 | E 12 |
— | 17 | 3 | 4 | 4 | 4 | 4 | 4 | 3 | 5 | 5 | 2 | 1 | 12 | 14 | 1 | — | 10 | 8 | 13 | 3 | |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | — | S 9 | S 8 | S 8 | E 14 | E 14 | E 13 | E 13 | E 13 | E 12 | E 12 | E 15 | SW 7 | S 7 | E 12 | S 10 | E 11 | S 8 | S 7 |
4 | 17 | — | 1 | 1 | 1 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 4 | 2 | 1 | 3 | 2 | 3 | 1 | 1 | |
Wind waves Height (m) Direction Period (s) | NNE 3 | NE 3 | NNE 3 | — | — | NNE 2 | NNE 3 | NNE 2 | NNE 2 | — | — | — | — | S 3 | S 4 | SSW 4 | S 8 | — | — | — | NE 3 |
8 | 2 | 1 | — | — | 1 | 1 | 1 | 1 | — | — | — | — | 7 | 12 | 8 | 31 | — | — | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 123 | 12 | 59 | 69 | 76 | 69 | 69 | 69 | 12 | 41 | 43 | 12 | 43 | 77 | 12 | 12 | 43 | 12 | 69 | 203 | 69 |
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.










