
Surf Forecasts:
Hanamizu River surf forecast from 9 Aug 2026:
- Best quality surf: Monday 10 Aug, 3AM (local time) - 1.5ft (0.5m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 3PM (local time) - 2ft (0.6m), 11s period, SSW swell with 93 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 3AM (local time) - 1.5ft (0.5m), 10s 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 (Aug 10) at 3AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.4m and 12s. 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 0.6m 11s and forecast to arrive on Monday (Aug 10) at 3PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 11) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 10th Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 3AM (Mon 10th Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 3PM (Mon 10th Aug) | 2ft (0.6m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, let’s get this out there. It’s Rusty.
Plain and simple, the next couple of weeks are going to be a serious test of patience around here. We’ve got a long, dry spell of tiny, weak surf ahead of us. Looking at the guidance, there’s just nothing on the table that’s going to get the heart rate up for a long while. The energy is weak, the swell is small, and most days are a write-off.
The first real glimmer of hope doesn’t show up until that Monday, the 24th of August. Even then, the morning is still pretty lifeless with a tiny 2ft SSE swell pushing a weak energy reading of 200. The afternoon sees a slight bump to 4ft from the SSE, with moderate energy at 443, but the wind is going to be cross-onshore, which will mess up any chance of it being clean. It’s a sign of life, but not a green light.
The standout, and really the only thing worth circling on the calendar, is the Tuesday morning of the 25th of August. That’s when we finally get a pulse. The swell pushes up to 4ft from the SSE with a nice long 12-second period, and the energy jumps to a solid 493. Most importantly, the conditions are forecast to be glassy. That’s the window. It’s a week and a half away, so don’t book the day off yet, but it’s the most promising thing on the whole board.
For that morning, the call is Hanamizu River. It’s a beach/sandbar break that’s fairly consistent, so it should have some shape. The swell is from the SSE, which matches what this spot wants. It’s a beginner-friendly wave at this size, so it won’t be too heavy. The glassy conditions will be the key – that’s when this place can really shine. The water temperature is about average for this time of year, so nothing unusual there. Just keep in mind, crowds are possible here, so get out early.
Before that Tuesday, you’re looking at a whole lot of nothing. The swell fades out completely, dropping to 1ft and even smaller, with weak energy readings in the 20s and 30s. The wind is messy, the waves are poor, and there’s just no reason to paddle out. It’s a barren stretch, plain and simple. A couple of mornings, like the 22nd, will be glassy, but with only 1ft on tap, it’s not even worth the effort.
So, my honest take? Give it a rest for a week and a half. Let the ocean sort itself out. Then, keep an eye on that Tuesday morning forecast for the 25th. It’s our best shot at a real surf in this entire two-week window.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Tue night. Warm (max 28°C on Mon morning, min 22°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Thu afternoon. Warm (max 29°C on Thu morning, min 24°C on Wed night). Winds increasing (light winds from the N on Wed night, fresh winds from the NNE by Fri afternoon). | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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) | SSW 11 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SE 10 | SE 9 | SSW 11 | SSW 9 |
Wave Graph | |||||||||||||||||||
88 | 62 | 93 | 58 | 63 | 64 | 58 | 58 | 59 | 39 | 38 | 38 | 29 | 28 | 28 | 27 | 21 | 38 | 29 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | glassy | cross | glassy | cross | glassy | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | 3:16AM1.49m | 5:31PM1.47m | 4:10AM1.55m | 5:55PM1.48m | 4:59AM1.57m | 6:17PM1.48m | 5:45AM1.54m | 6:38PM1.48m | |||||||
Low Tide | 8:52AM0.13m | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | 10:28AM0.00m | 10:44PM0.87m | 11:08AM0.03m | 11:20PM0.74m | 11:43AM0.11m | 11:56PM0.62m | 12:15PM0.24m | 00:33AM0.52m | |||||||
— | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | |
6:38 | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | 3 | — | — | — | — | 1 | 10 | 3 | 6 | 2 | — | 8 | 1 | 1 | — | 5 | — | 4 | 10 |
Temp °C | 26 | 28 | 28 | 25 | 27 | 28 | 23 | 25 | 26 | 25 | 29 | 28 | 25 | 28 | 28 | 25 | 28 | 29 | 25 |
Feels °C | 29 | 29 | 32 | 25 | 28 | 29 | 25 | 25 | 28 | 26 | 29 | 29 | 26 | 27 | 26 | 26 | 29 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SE 9 | SSW 11 | SSW 9 |
88 | 62 | 93 | 58 | 63 | 64 | 58 | 58 | 59 | 39 | 38 | 38 | 29 | 28 | 28 | 17 | 21 | 38 | 29 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | SW 12 | E 12 | E 11 | E 11 | E 11 | SE 13 | S 3 | SE 12 | SSE 4 | S 6 | SE 9 | SE 12 | SSE 11 | SSE 12 | SE 10 | SSW 9 | SE 10 | SE 9 |
23 | 21 | 11 | 9 | 2 | 2 | 6 | 1 | 6 | 2 | 2 | 3 | 5 | 13 | 13 | 27 | 16 | 15 | 19 | |
Swell 3 Height (m) Direction Period (s) | ESE 12 | ESE 12 | SE 11 | SW 11 | SE 13 | SE 13 | E 11 | SE 13 | E 10 | SE 12 | SE 11 | SE 12 | SE 9 | SE 6 | ESE 10 | SE 10 | S 11 | S 9 | E 12 |
15 | 14 | 5 | 5 | 6 | 6 | 2 | 6 | 2 | 5 | 5 | 5 | 3 | 1 | 10 | 4 | 9 | 6 | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 2 | NNE 3 | SW 3 | SSW 3 | — | SSE 5 | — | NNE 3 | — | NE 3 | NNE 3 | NNE 3 | NNE 3 | — | — | — |
— | — | — | 2 | 3 | 2 | 1 | — | 4 | — | 3 | — | 2 | 4 | 1 | 7 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 19 | 0 | 59 | 0 | 103 | 0 | 10 | 12 | 12 | 59 | 59 | 12 | 112 | 119 | 12 | 12 | 27 | 12 |
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.











