
Surf Forecasts:
Hanamizu River surf forecast from 2 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 3AM (local time) - 11ft (3.5m), 12s period, S swell with cross-shore winds.
- Most powerful swell: Wednesday 9 Sep, 3AM (local time) - 11ft (3.5m), 12s period, S swell with 3,035 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 3PM (local time) - 2.5ft (0.8m), 9s 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 Thursday (Sep 03) at 3PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.1m and 10s. Another secondary swell of 0.1m and 13s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 3.5m 12s and forecast to arrive on Wednesday (Sep 09) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Sep 06) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 3rd Sep) | 2.5ft (0.8m) 9s |
| Best Surf | 3AM (Wed 9th Sep) | 11ft (3.5m) 12s |
| Most Powerful | 3AM (Wed 9th Sep) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Oi, Rusty here. Lookin' at the Hanamizu River stretch over the next 16 days, and straight up, it's a lean run. There's a big gap of near-nothin' for the first week and a half, so don't be in a rush. The water temp is sittin' pretty average for this time of year, nothin' unusual there.
Alright, let's get into it. The first bit of hope pops up late on Thursday, September 10. The mornin' is still a write-off with risk tstorms and messy cross-shore wind, but by Thursday afternoon, it's a whole different story. The wind goes glassy, and we're lookin' at a clean 6.9ft swell from the south (period 9 seconds). The combined wave energy is strong (1083), and conditions are set to be very good. That's the standout of the whole window. The swell is solid, over 6.5ft, so this is one for experienced surfers – the river mouth can handle that size, but it'll be powerful.
The rest of the period is a struggle. There's a pulse of energy on Tuesday, September 8, with a 4.9ft south swell and light onshore wind, but it's marginal. Then, on Wednesday, September 9, things get big and ugly with a 9.8ft south swell and 25 km/h cross-onshore winds. That's a 2172 combined energy reading, but with that wind, it's a messy, dangerous beast. Only for the hardcore experts, and even then, it's a kite-surfin' day more than a paddle day.
Later on, around Thursday, September 17, there's a long-period south swell (16 seconds) rollin' in at 1.6ft, but it's very ordinary. September 18 has a bit more size at 4.3ft with a 15-second period from the SSE, but it's just marginal. The set gaps will be long with that period, so while it's a better wave shape, you'll be waitin'. The crowds are listed as "sometimes" at this spot, so on the good days, expect a few others with the same idea.
Overall, if you're not after that Thursday 10th afternoon session, you're better off waitin' for the next system. This forecast is thin, but it only takes one glassy afternoon to make it worth it.
Short Range ForecastHeavy rain (total 100mm), heaviest during Fri night. Warm (max 29°C on Thu morning, min 20°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 110mm), heaviest during Tue afternoon. Warm (max 27°C on Tue morning, min 21°C on Sat night). Winds increasing (calm on Mon morning, strong winds from the S by Tue afternoon). | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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 9 | S 9 | S 9 | S 11 | S 10 | SSW 10 | SSW 9 | SSW 10 | SSW 9 | SSW 8 | SSW 8 | SE 7 | SE 8 | SSE 7 | SSE 7 | S 8 | S 10 | S 10 | S 13 |
Wave Graph | |||||||||||||||||||
37 | 39 | 94 | 91 | 73 | 55 | 50 | 36 | 26 | 23 | 14 | 25 | 67 | 66 | 78 | 493 | 479 | 371 | 1659 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | on | cross-on | cross |
High Tide | 8:44AM1.20m | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | 8:45PM1.32m | 3:36PM1.25m | 10:48PM1.25m | 3:45PM1.33m | 1:09AM1.28m | 4:04PM1.39m | 2:28AM1.38m | ||||||||
Low Tide | 2:06AM0.32m | 1:35PM0.87m | 3:03AM0.35m | 1:53PM1.01m | 4:23AM0.38m | 6:11AM0.37m | 7:15PM1.21m | 7:42AM0.29m | 8:41PM1.09m | 8:43AM0.22m | 9:20PM0.95m | ||||||||
— | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | |
6:08 | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:04 | — | — | 6:01 | — | — | 6:00 | — | |
mm | — | — | 1 | 2 | 2 | 6 | 79 | 8 | 2 | 6 | 4 | 17 | 21 | 3 | 4 | 21 | 14 | 20 | 12 |
Temp °C | 27 | 29 | 29 | 25 | 25 | 24 | 21 | 22 | 22 | 21 | 22 | 21 | 22 | 23 | 25 | 25 | 27 | 26 | 27 |
Feels °C | 31 | 30 | 31 | 25 | 28 | 26 | 22 | 22 | 22 | 19 | 20 | 19 | 21 | 24 | 27 | 29 | 28 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | SE 10 | S 11 | S 10 | SSW 10 | SSW 9 | SSW 10 | SSW 9 | SSW 8 | SSW 8 | SE 7 | SE 8 | SSE 7 | SSE 7 | S 8 | S 10 | S 10 | — |
37 | 39 | 4 | 91 | 73 | 55 | 50 | 36 | 26 | 23 | 14 | 25 | 67 | 66 | 78 | 224 | 479 | 371 | — | |
Swell 2 Height (m) Direction Period (s) | SSW 10 | SE 10 | S 13 | SE 10 | SE 6 | SE 7 | SE 9 | SE 7 | SE 7 | SE 8 | SE 8 | SSW 8 | SSW 9 | SSW 8 | SSW 9 | SSW 12 | E 10 | SE 10 | — |
10 | 4 | 3 | 4 | 9 | 11 | 12 | 7 | 9 | 10 | 10 | 7 | 7 | 7 | 15 | 46 | 2 | 26 | — | |
Swell 3 Height (m) Direction Period (s) | SE 11 | E 10 | E 10 | SE 10 | SE 9 | SE 9 | E 9 | E 9 | E 13 | — | E 12 | SE 8 | SW 10 | SW 9 | SW 8 | SE 13 | ESE 10 | ESE 10 | — |
4 | 2 | 2 | 15 | 3 | 3 | 7 | 6 | 3 | — | 3 | 3 | 4 | 3 | 18 | 7 | 10 | 10 | — | |
Wind waves Height (m) Direction Period (s) | — | — | S 9 | NE 3 | — | NNE 2 | N 3 | — | NE 3 | NE 4 | NE 4 | NNE 4 | N 4 | — | S 3 | S 8 | — | — | S 13 |
— | — | 94 | 2 | — | 1 | 1 | — | 3 | 15 | 25 | 15 | 7 | — | 1 | 493 | — | — | 1659 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 76 | 77 | 0 | 19 | 10 | 0 | 12 | 59 | 463 | 461 | 461 | 461 | 461 | 0 | 13 | 0 | 527 | 465 | 463 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










