Surf Forecasts:
Hanamizu River surf forecast from 24 Jul 2026:
- Most powerful swell: Wednesday 29 Jul, 3PM (local time) - 1.5ft (0.5m), 8s period, S swell with 33 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 0.5m 8s and forecast to arrive on Wednesday (Jul 29) at 3PM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Wed 29th Jul) | 1.5ft (0.5m) 8s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, let’s break it down. Rusty here, looking at the Hanamizu River for the next couple of weeks.
Honestly, it’s a tough start. From Saturday the 25th of July through to the 3rd of August, the surf is basically flat. You’re looking at 0.3ft to 0.6ft or so, with wind mostly cross-onshore or choppy. Combined wave energy is weak, mostly under 100 (like 26 or 37). There’s a glassy moment on Sunday afternoon (26th July) with a 1ft, 11-second SE swell, but the energy is only 27 – it’s barely a ripple. Not worth the drive. The water temp is about average for the time of year.
That’s nearly nine days of nothing. The first real sign of life is Monday the 3rd of August. The combined energy climbs to 163 (moderate), with a 2ft SE swell at 17 seconds – that’s long-period groundswell. It’s still small, and the wind is cross-shore, but you’ll see a few lines.
The real action starts Tuesday the 4th of August. The swell hits 4ft from the SE, with a very long period of 18 seconds. The combined energy jumps to 1051 (strong). The wind is cross-shore from the NE – not perfect, but it’s workable. Because it’s a beach/sandbar, that super long period (over 15 seconds) can make the waves break a bit walled up, but there’s enough size and power to get some. It’s a marginal call, but it’s the first real session.
The standout? No question, Thursday the 6th of August. We’re talking a 23ft SE swell with a 14-second period. The combined energy is a massive 29942 – that’s very strong. The wind is a moderate cross-shore from the NE in the morning, so it’s clean. But this is a beginner-friendly spot, and 23ft is enormous – it’s for experts only. Pure power. If you’re not ready for that, stay on the beach. The afternoon gets messy with 25 km/h (15 mph) cross-onshore chop, so hit it early.
There’s a surfable window on Saturday the 8th of August – a 4ft SSE swell with offshore NW wind in the afternoon, giving clean conditions. But the energy is only 197 (moderate), and the period is short at 8 seconds. It’s okay, but nothing special.
So, the first week is a bust. The only real target is the 6th of August for the big-wave crew, and Tuesday the 4th for a decent paddle. The rest is a waiting game. Forecasts can change, but right now, it’s a slow start.
Rusty.
Short Range ForecastHeavy rain (total 30mm), heaviest during Sun night. Warm (max 30°C on Sat morning, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 32mm), heaviest during Tue night. Warm (max 27°C on Wed afternoon, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | ||||||||||||||
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) | SE 11 | SE 10 | SE 10 | SSE 15 | SE 15 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 8 | SSW 8 | S 8 | SSW 4 | SSW 6 | SSW 6 | SSW 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 18 | 15 | 15 | 22 | 8 | 18 | 18 | 20 | 16 | 16 | 15 | 15 | 14 | 13 | 33 | 6 | 7 | 12 | 6 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | glassy | cross-on | glassy | cross-off | cross | cross-on | glassy | glassy | cross-on | cross-off | cross-on | glassy | cross-off | cross-on | cross-on | cross-off |
High Tide | 11:26PM1.28m | 4:24PM1.19m | 00:48AM1.28m | 4:44PM1.26m | 1:59AM1.31m | 5:07PM1.31m | 2:54AM1.37m | 5:29PM1.36m | 3:40AM1.42m | 5:51PM1.39m | 4:21AM1.46m | 6:13PM1.42m | |||||||
Low Tide | 8:03AM0.40m | 7:57PM1.13m | 8:56AM0.32m | 9:09PM1.09m | 9:39AM0.25m | 9:52PM1.04m | 10:16AM0.18m | 10:26PM0.97m | 10:50AM0.14m | 10:59PM0.90m | 11:21AM0.13m | 11:31PM0.83m | |||||||
 |  |  | |  |  | | | |  | | | |  | | | | |  | |
 | — | 4:45 | — | — | 4:46 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:48 | — | — |
 | 6:52 | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:49 | — |
mm | 1 | — | 3 | 4 | — | 8 | 14 | — | — | 1 | — | 3 | 22 | 1 | 4 | 1 | — | — | — |
Temp °C | 28 | 30 | 29 | 26 | 27 | 26 | 26 | 26 | 27 | 25 | 26 | 26 | 24 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 34 | 34 | 32 | 30 | 30 | 31 | 31 | 28 | 30 | 29 | 28 | 29 | 28 | 29 | 31 | 28 | 28 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 10 | SE 10 | SE 15 | SE 11 | S 9 | SSW 8 | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SE 9 | SSW 4 | SSW 6 | SSW 8 | SSW 7 |
| kJ | 18 | 15 | 15 | 15 | 8 | 18 | 6 | 14 | 13 | 14 | 15 | 15 | 14 | 13 | 3 | 5 | 7 | 6 | 5 |
Swell 2 Height (m) Direction Period (s) | SE 16 | SE 16 | SE 16 | SSE 15 | SE 11 | SE 15 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSE 10 | SE 10 | SE 12 | SSW 8 | SSW 8 | SE 10 | SE 10 |
| kJ | 10 | 10 | 10 | 22 | 5 | 8 | 18 | 16 | 16 | 16 | 15 | 15 | 9 | 4 | 6 | 6 | 6 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | SSW 5 | S 7 | SE 4 | S 8 | S 7 | S 7 | ESE 3 | SSE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | — | SE 9 | SE 9 | SE 12 | SE 12 |
| kJ | 2 | 1 | 1 | 1 | 4 | 1 | 1 | 20 | 8 | 7 | 7 | 7 | 7 | 6 | — | 3 | 3 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | S 7 | — | S 2 | — | — | — | — | — | — | — | — | — | — | — | S 8 | — | — | SSW 6 | ENE 3 |
| kJ | 4 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 33 | — | — | 12 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 41 | 62 | 62 | 41 | 12 | 62 | 69 | 12 | 12 | 12 | 77 | 69 | 41 | 41 | 69 | 69 | 104 | 76 |
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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