Surf Forecasts:
Hanamizu River surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 6PM (local time) - 8ft (2.5m), 9s period, S swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 6PM (local time) - 8ft (2.5m), 9s period, S swell with 1,016 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 3AM (local time) - 3ft (0.9m), 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 Monday (Sep 07) at 3AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.9m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 2.5m 9s and forecast to arrive on Monday (Sep 07) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 06) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 7th Sep) | 3ft (0.9m) 9s |
| Best Surf | 6PM (Mon 7th Sep) | 8ft (2.5m) 9s |
| Most Powerful | 6PM (Mon 7th Sep) | 8ft (2.5m) 9s |
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’s on the table for the next couple of weeks.
Right off the bat, I gotta be straight with you – the next few days are pretty grim. This is a slow start, and we’re looking at a real quiet spell until things finally show a pulse. From now until the 7th of September, the surf is tiny and the wind is a mess. You’re looking at knee-high slop at best, with a stiff breeze ruining any chance of a clean face. Not worth paddling out for.
The first real sign of life shows up on Monday the 7th. There’s a pulse of swell coming in, but it’s raw and messy. By Monday afternoon, we’ve got some 8ft swell from the south, but the period is short at 9 seconds, and the wind is cross-offshore. The wave energy is heavy – 1015 – but the conditions are described as “marginal.” It’s for the experienced crew only, and even then, it’s going to be a battle.
Tuesday the 8th is where it finally gets interesting. The morning brings a clean 4ft south swell with a 9-second period, and the wind is dead glassy with an ENE breeze at 0 mph. The water is a warm 82°, about a touch warmer than normal for this time of year. The wave energy is moderate at 555, and the conditions are clean. Hanamizu River is a beach/sandbar setup, so with that long period, the waves might straighten out a bit, but for a Tuesday morning with no crowds, it’s your best bet. It’s a beginner-friendly spot, and with the glassy conditions, it’ll be a fun little wave for learners.
Wednesday the 9th sees a bit more size – 6ft from the SSW – but the wind shifts to a light cross-shore, making it a little lumpy. The energy is still strong at 867, but it’s not as clean as Tuesday. For the intermediate surfer, it’s still worth a look, but the glassy Tuesday morning is the standout.
After that, the swell drops off fast. From Thursday the 10th through to the 21st of September, we’re back to tiny, weak waves. A few days in the second week have a little bump – like the 21st with 3ft and 160 energy – but it’s mostly poor conditions with onshore winds. Honestly, after the 9th, you’re better off keeping the board in the car.
So, if you’re keen, Tuesday morning the 8th is the one to circle. Glassy, clean, and a fun little wave for the beginners. The rest of the run is a write-off.
Rusty.
Short Range ForecastHeavy rain (total 242mm), heaviest during Mon morning. Warm (max 26°C on Mon morning, min 20°C on Sun afternoon). Winds decreasing (fresh winds from the NNE on Sun afternoon, calm by Tue morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Wed night. Warm (max 28°C on Wed morning, min 21°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | SSE 8 | SE 8 | SE 8 | SSE 8 | S 9 | S 9 | S 9 | S 9 | SSW 10 | SSW 9 | SSW 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 7 | S 7 | S 8 | S 8 | SSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 16 | 98 | 737 | 994 | 526 | 276 | 181 | 135 | 543 | 344 | 270 | 185 | 136 | 80 | 40 | 27 | 17 | 20 | 18 | 20 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-on | cross-off | cross | glassy | glassy | glassy | cross | cross | cross-off | glassy | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off |
High Tide | 3:36PM1.25m | 10:48PM1.25m | 3:45PM1.33m | 1:09AM1.28m | 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 | ||||||||
Low Tide | 7:15PM1.21m | 7:42AM0.29m | 8:41PM1.09m | 8:43AM0.22m | 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 | ||||||||
 |  |  |  | |  | | | |  | |  | | |  |  | |  | | | | |
 | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — |
 | — | 6:04 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 5:58 | — | — | 5:57 | — | — | 5:54 | — |
mm | 2 | 44 | 97 | 77 | 12 | 5 | 2 | 1 | 2 | — | 2 | 7 | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 21 | 26 | 25 | 26 | 26 | 26 | 26 | 28 | 28 | 22 | 23 | 24 | 21 | 21 | 23 | 23 | 25 | 26 | 25 |
Feels °C | 19 | 18 | 18 | 26 | 27 | 30 | 31 | 32 | 30 | 32 | 32 | 22 | 25 | 27 | 21 | 22 | 25 | 25 | 27 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SE 8 | SE 8 | — | E 8 | S 9 | S 9 | S 9 | SSE 8 | SSW 10 | SSE 8 | S 9 | S 9 | S 8 | S 8 | S 8 | S 7 | S 7 | S 8 | S 8 | SSW 10 |
| kJ | 7 | 16 | 98 | — | 21 | 526 | 276 | 181 | 99 | 205 | 76 | 270 | 185 | 136 | 80 | 40 | 27 | 17 | 20 | 18 | 20 |
Swell 2 Height (m) Direction Period (s) | ESE 7 | SSE 8 | S 9 | — | — | E 8 | SSE 9 | SSW 9 | SSW 10 | SSE 8 | SE 10 | ESE 9 | — | ESE 10 | SE 9 | E 10 | SE 10 | S 9 | SE 10 | SE 10 | SSW 13 |
| kJ | 5 | 12 | 83 | — | — | 10 | 252 | 66 | 135 | 116 | 24 | 8 | — | 10 | 3 | 2 | 4 | 6 | 4 | 4 | 16 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | S 8 | S 11 | — | — | SE 10 | SE 10 | SW 11 | ESE 10 | E 12 | E 16 | SE 11 | E 15 | E 15 | E 16 | S 9 | S 8 | E 10 | E 14 | S 11 | S 7 |
| kJ | 7 | 1 | 41 | — | — | 25 | 27 | 40 | 10 | 3 | 5 | 5 | 4 | 17 | 5 | 1 | 1 | 2 | 4 | 3 | 4 |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 4 | NNE 4 | SSE 8 | S 9 | — | — | — | — | SSW 9 | SSW 9 | NNE 3 | NNE 3 | NNE 3 | NNE 3 | — | — | — | — | — | — |
| kJ | 14 | 16 | 11 | 737 | 994 | — | — | — | — | 543 | 344 | 5 | 3 | 3 | 1 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 463 | 444 | 527 | 463 | 112 | 13 | 0 | 0 | 0 | 13 | 13 | 3 | 0 | 10 | 0 | 69 | 69 | 69 | 41 | 41 | 59 |
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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