Surf Forecasts:
Hanamizu River surf forecast from 9 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 6ft (1.8m), 9s period, S swell with 498 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 1.8m 9s and forecast to arrive on Wednesday (Sep 09) 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 0.6m 3s period and expected on Thursday (Sep 10) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Wed 9th Sep) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about the Hanamizu River.
Right off the bat, I gotta be straight with you. The next week and a half is a real write-off. We’re looking at a long stretch of weak, messy conditions straight through to the end of the week after next, with nothing worth paddling out for. The swell is tiny, and the wind is all over the place. Don't bother checking the cams, you'll just get depressed. This is a blank run for the area, and it's a pretty normal thing for this setup to go quiet for a spell.
But hold on, because the long-range forecast is where it gets interesting. We’ve got some serious energy lining up way down south, and it’s aiming right at us.
The first real glimmer of hope shows up on Friday the 18th of September. The surf will be small, but the swell from the SSE is packing some serious period—17 seconds. That's proper groundswell. The energy at the river mouth will be moderate (137), and it’ll be clean with a light NNE cross-off wind. It’s a sign of things to come.
Then, Saturday the 19th of September is where it starts to get good. The swell builds to a solid 5ft from the SSE, with a very long 16-second period. The energy is going to be strong (1377), and the wind stays light offshore out of the NNE. The water is a touch warmer than normal for this time of year, sitting at 82°.
Sunday the 20th of September and Monday the 21st are the standouts. This is the best on offer for the whole 16-day window. On Sunday, we’ve got a clean 5ft swell from the south with a 16-second period, and the energy is pumping (1759). The wind is glassy in the morning, and it stays clean all day. Monday morning pushes it even further: a 6ft swell from the SSW, still with that 16-second period, and the energy is powerful (1964). Winds are light and offshore. This is excellent surf for experienced surfers, but with waves over 5ft, it’s not for the beginners. The river mouth setup loves a long-period groundswell from this direction, so expect long, clean lines and big gaps between sets. It’ll be worth the wait.
The swell holds through Tuesday the 22nd but starts to get a bit messy as the wind shifts onshore later in the day. Then Wednesday the 23rd gets blown out by strong SW winds, so that's a no-go. Thursday the 24th looks like a nice cleanup, with glassy conditions and a 5ft south swell, but the energy is dropping off. It’ll be a good session for the die-hards, but the real magic was the couple of days before.
This is a classic case of the second week saving the forecast. Keep your fingers crossed for that Monday and Tuesday.
Rusty.
Short Range ForecastHeavy rain (total 38mm), heaviest during Wed night. Warm (max 28°C on Wed morning, min 20°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Warm (max 28°C on Mon morning, min 21°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 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) | S 8 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SE 8 | SE 8 | S 4 | S 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 524 | 621 | 306 | 143 | 84 | 45 | 28 | 28 | 29 | 18 | 10 | 9 | 13 | 18 | 18 | 33 | 27 | 23 | 28 | 26 | 41 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | glassy | cross-on | cross-on | cross-off | cross-off | cross-on | cross-off |
High Tide | 4:25PM1.43m | 3:26AM1.47m | 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 | ||||||||
Low Tide | 9:30AM0.17m | 9:53PM0.79m | 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 | |||||||
 |  |  |  |  | | | |  | | |  | | |  | | | |  | | | |
 | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 6:00 | — | — | 5:58 | — | — | 5:57 | — | — | 5:54 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — |
mm | — | 4 | 18 | 1 | — | 13 | 1 | 1 | — | — | 1 | 1 | — | — | — | — | — | — | 1 | — | — |
Temp °C | 28 | 28 | 22 | 20 | 20 | 20 | 20 | 20 | 20 | 22 | 23 | 22 | 24 | 26 | 25 | 28 | 28 | 26 | 27 | 27 | 25 |
Feels °C | 31 | 31 | 21 | 18 | 19 | 19 | 20 | 20 | 20 | 22 | 25 | 24 | 26 | 29 | 28 | 29 | 29 | 29 | 28 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | E 16 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SE 8 | SE 8 | SE 8 | E 12 |
| kJ | 10 | 5 | 306 | 143 | 84 | 45 | 28 | 28 | 29 | 18 | 10 | 9 | 13 | 18 | 18 | 33 | 27 | 23 | 28 | 9 | 11 |
Swell 2 Height (m) Direction Period (s) | SE 12 | — | ESE 9 | E 11 | SE 9 | SE 9 | E 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SSW 7 | SSW 7 | S 7 | S 7 | E 12 | S 7 | S 7 | E 13 | E 14 |
| kJ | 6 | — | 9 | 2 | 14 | 3 | 2 | 4 | 4 | 4 | 4 | 3 | 5 | 5 | 1 | 1 | 12 | 1 | 1 | 13 | 4 |
Swell 3 Height (m) Direction Period (s) | E 17 | — | SE 11 | — | E 15 | E 16 | S 9 | S 8 | E 14 | S 8 | E 14 | SE 7 | E 13 | — | — | E 12 | E 15 | SW 7 | S 7 | — | S 8 |
| kJ | 6 | — | 5 | — | 17 | 5 | 1 | 1 | 4 | 1 | 4 | 2 | 3 | — | — | 3 | 4 | 2 | 1 | — | 1 |
Wind waves Height (m) Direction Period (s) | S 8 | S 9 | NE 3 | NE 3 | NE 3 | NNE 3 | — | — | NE 2 | NE 2 | NNE 2 | — | NNE 2 | NNE 3 | — | — | S 3 | SSW 3 | SSW 3 | S 4 | S 6 |
| kJ | 524 | 621 | 9 | 5 | 5 | 1 | — | — | 1 | 2 | 1 | — | 1 | 1 | — | — | 7 | 4 | 1 | 26 | 41 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 493 | 13 | 119 | 59 | 12 | 12 | 76 | 69 | 69 | 69 | 41 | 12 | 69 | 41 | 12 | 43 | 77 | 12 | 12 | 77 | 12 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Hanamizu River surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest