Surf Forecasts:
Hanamizu River surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9PM (local time) - 3ft (0.9m), 10s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 9AM (local time) - 5.5ft (1.7m), 9s period, SSW swell with 463 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 9PM (local time) - 3ft (0.9m), 10s period with SSW 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 Tuesday (Sep 08) at 9PM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.9m and 8s. 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 1.7m 9s and forecast to arrive on Wednesday (Sep 09) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Sep 10) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 8th Sep) | 3ft (0.9m) 10s |
| Best Surf | 9PM (Tue 8th Sep) | 3ft (0.9m) 10s |
| Most Powerful | 9AM (Wed 9th Sep) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s on the table for the next couple of weeks.
Honestly, most of this forecast is a tough one to swallow. For the better part of the next two weeks, we’re looking at a lot of flat, small, and messy conditions. There’s a big gap from now until the 21st of September where there’s really nothing to get excited about. The surf is tiny, the winds are all over the place, and the energy just isn’t there. It’s going to be a real dry spell, so maybe break out the longboard or the fishing gear for a while.
The only real light at the end of the tunnel comes on Monday, September 21st. That’s our standout. The Hanamizu River (beach/sandbar) is looking like it could be the session of the fortnight. We’ve got a solid 4ft to 5ft swell coming in from the SE, and the period is a very long 16 seconds. That’s proper groundswell energy. The combined energy is massive, hitting 1036-1357, so you’ll feel the power. The wind is a dream: light and glassy, turning offshore. It’s going to be clean, clean, clean. The water is sitting at a warm 82°F, which is a touch warmer than normal for this time of year, so that’s a nice bonus. This is definitely one for the experienced crew though—at over 5ft and with that long period, it’s going to be powerful and better suited to the point or reef setups than the sandbar, which can get a bit straight. Still, it’s the best we’ve got, and it looks excellent.
The next day, Tuesday the 22nd, still has some size at 4ft with the same long period, but the wind switches and it gets a bit cross. It’s a step down, still surfable, but not the gem of the 21st.
So, if you’re keen, mark your calendar for Monday the 21st. The rest of the run is a washout. Stay patient.
- Rusty
Short Range ForecastHeavy rain (total 26mm), heaviest during Wed night. Warm (max 30°C on Tue afternoon, min 19°C on Thu night). Winds increasing (calm on Tue morning, fresh winds from the NNE by Wed night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri morning. Warm (max 26°C on Sun afternoon, min 19°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 10 | S 9 | SSW 10 | SSW 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 9 | SE 9 | SSE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 192 | 196 | 132 | 463 | 412 | 220 | 140 | 140 | 84 | 61 | 43 | 40 | 28 | 18 | 9 | 10 | 12 | 18 | 30 | 39 | 47 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | glassy | cross-on | cross-on | cross-off |
High Tide | 4:04PM1.39m | 2:28AM1.38m | 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 | ||||||||
Low Tide | 9:20PM0.95m | 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 | ||||||||
 | |  |  | |  |  | |  | |  |  | | | | | |  | | |  | |
 | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — |
 | — | 6:00 | — | — | 6:00 | — | — | 5:58 | — | — | 5:57 | — | — | 5:54 | — | — | 5:53 | — | — | 5:52 | — |
mm | — | — | 2 | — | — | 17 | 3 | 2 | 2 | 4 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 30 | 27 | 30 | 30 | 22 | 20 | 21 | 20 | 20 | 20 | 21 | 21 | 22 | 21 | 24 | 26 | 25 | 27 | 27 | 26 |
Feels °C | 32 | 32 | 31 | 30 | 31 | 20 | 19 | 20 | 19 | 21 | 21 | 22 | 22 | 23 | 22 | 26 | 29 | 28 | 30 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 9 | SSW 10 | E 12 | — | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 9 | SE 9 | SSE 8 |
| kJ | 192 | 196 | 132 | 3 | — | 220 | 140 | 140 | 84 | 61 | 43 | 40 | 28 | 18 | 9 | 10 | 12 | 18 | 30 | 39 | 47 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | E 10 | E 12 | SE 10 | E 16 | ESE 9 | E 11 | ESE 11 | E 16 | E 10 | SE 10 | SE 9 | SE 10 | SE 10 | SE 9 | SSE 9 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SW 8 |
| kJ | 113 | 2 | 3 | 24 | 5 | 9 | 2 | 11 | 5 | 2 | 4 | 3 | 4 | 4 | 3 | 8 | 5 | 5 | 7 | 6 | 3 |
Swell 3 Height (m) Direction Period (s) | SE 10 | ESE 10 | SE 12 | E 17 | — | SE 11 | — | E 15 | E 14 | E 14 | E 15 | S 8 | E 14 | E 14 | E 13 | E 13 | E 13 | S 9 | E 12 | E 12 | S 11 |
| kJ | 16 | 10 | 6 | 6 | — | 5 | — | 17 | 16 | 4 | 4 | 1 | 4 | 4 | 4 | 3 | 3 | 2 | 12 | 3 | 2 |
Wind waves Height (m) Direction Period (s) | — | S 4 | S 7 | SSW 9 | S 9 | NE 3 | NNE 3 | NE 3 | NNE 3 | — | NNE 2 | NNE 2 | — | — | — | — | — | — | — | S 2 | — |
| kJ | — | 14 | 107 | 463 | 412 | 5 | 5 | 5 | 2 | — | 1 | 1 | — | — | — | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 77 | 465 | 730 | 465 | 203 | 123 | 12 | 12 | 0 | 12 | 12 | 69 | 12 | 69 | 69 | 41 | 41 | 41 | 103 | 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.
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