Surf Forecasts:
Hanamizu River surf forecast from 23 Jul 2026:
- Most powerful swell: Monday 27 Jul, 9PM (local time) - 2.5ft (0.7m), 6s period, SSW swell with 34 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 0.7m 6s and forecast to arrive on Monday (Jul 27) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Jul 28) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Mon 27th Jul) | 2.5ft (0.7m) 6s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, let's get into it. I'm Rusty, and I've been staring at this forecast for a while now. Gotta be straight with you – it's a rough stretch for the Hanamizu River. The opening days are a total write-off with no real swell to speak of. We're looking at an almost two-week gap before we see anything that might get the heart rate up.
From Thursday the 23rd right through to the end of July, it's flat. The swell is barely a ripple, mostly that weak SE windswell with periods under 10 seconds. The first few days have a bit of cross-onshore breeze, making it choppy and messy. You'll be paddling for nothing. The water's sitting at a comfortable 80°F with a positive anomaly, so it's a touch warmer than usual for this time of year, but that's about the only good thing.
We get a little flicker of life on the 1st of August, but it's still tiny. The real interest starts on Monday the 3rd of August. The morning brings a pulse of 3ft ESE swell with a solid 18-second period. That's a long-period groundswell pushing through, and the combined energy hits 445 (moderate). It's a river mouth, so that long period might actually help it shape up better than a beach break. It's cross-on though, so not perfect. The morning of Tuesday the 4th of August is where it's at. The swell holds at 2ft from the ESE, still that long 19-second period, but the wind goes glassy. That's a window for clean, lined-up waves, and the energy is still strong at 320 (moderate). It's a beginner-friendly spot, and with that size, it's perfect for a longboard or a foiler. Keep in mind, crowds are possible here sometimes.
The Wednesday morning the 5th has another glassy moment with a smaller 1ft ESE swell (85 energy), but it's very ordinary. After that, the energy drops off again and the wind picks up, turning the river mouth into a bit of a choppy mess. The 7th of August shows a spike in size to 6ft from the SSW, but that's a short-period windswell (6 seconds) with onshore wind. That'll be a washing machine, and honestly, it might be more fun for a kite surfer than a paddle surfer.
So, to wrap it up: the only real standout is the morning of Tuesday the 4th of August. Get there early for the glassy conditions and that long-period ESE groundswell. It won't be epic, but it's the best we've got in this 16-day window. The rest is a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Sat night. Warm (max 32°C on Thu afternoon, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Tue afternoon. Warm (max 29°C on Mon morning, min 22°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||
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) | SSW 6 | SSW 6 | SSE 10 | SSE 9 | SSE 9 | SE 11 | SE 10 | SE 10 | SSE 15 | SE 15 | SE 11 | SE 11 | SE 10 | S 6 | S 6 | SSW 9 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 12 | 12 | 12 | 11 | 18 | 15 | 15 | 22 | 8 | 18 | 20 | 16 | 24 | 23 | 15 | 29 | 22 | 22 | 13 | 13 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | on | cross-on | cross-on | on | cross-on | cross | glassy | cross-on | off | glassy | cross-on | cross | cross | cross | cross-off | cross | on | cross |
High Tide | 1:53PM1.02m | 10:23PM1.31m | 4:27PM1.11m | 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 | ||||||||
Low Tide | 3:14PM1.02m | 6:57AM0.47m | 5:02PM1.11m | 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 | ||||||||
 | |  | | |  |  | | |  |  | | | | |  |  |  | | | | |
 | 4:43 | — | — | 4:45 | — | — | 4:45 | — | — | 4:46 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — |
 | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — |
mm | — | — | — | — | — | 2 | 1 | 2 | 18 | — | 7 | 3 | — | — | 4 | 3 | 6 | — | — | — | — |
Temp °C | 31 | 32 | 29 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 27 | 29 | 29 | 26 | 23 | 23 | 22 | 26 | 26 | 25 |
Feels °C | 35 | 35 | 33 | 32 | 31 | 32 | 33 | 32 | 30 | 30 | 31 | 32 | 31 | 30 | 29 | 24 | 24 | 23 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SE 10 | S 5 | S 7 | SSW 7 | SE 11 | SE 10 | SE 10 | SE 10 | SE 15 | SE 11 | S 9 | S 5 | SSW 8 | S 6 | SSW 6 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
| kJ | 12 | 4 | 2 | 4 | 5 | 18 | 15 | 15 | 15 | 8 | 18 | 14 | 14 | 14 | 23 | 11 | 29 | 22 | 22 | 13 | 13 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | S 8 | SSE 10 | SSE 9 | SSE 9 | SSE 3 | SE 16 | SE 16 | SSE 15 | SE 11 | SE 15 | SE 11 | SSW 8 | SE 10 | SSW 8 | SSW 9 | SE 10 | SE 10 | SE 10 | SE 9 | — |
| kJ | 10 | 1 | 9 | 8 | 8 | 1 | 10 | 10 | 22 | 5 | 8 | 18 | 14 | 16 | 14 | 15 | 15 | 4 | 4 | 3 | — |
Swell 3 Height (m) Direction Period (s) | SE 19 | S 19 | SE 18 | SE 18 | SE 17 | SE 16 | S 7 | S 7 | S 3 | SE 9 | S 9 | SSE 14 | SE 10 | SE 14 | SE 10 | SSE 10 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 |
| kJ | 15 | 7 | 12 | 12 | 11 | 10 | 1 | 1 | 1 | 3 | 2 | 20 | 16 | 8 | 16 | 9 | 7 | 7 | 7 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | — | SSW 6 | — | — | S 2 | SE 3 | — | S 2 | ESE 4 | — | S 3 | SSW 3 | — | S 6 | — | NE 3 | — | — | — | — | — |
| kJ | — | 12 | — | — | 1 | 3 | — | 1 | 2 | — | 2 | 1 | — | 24 | — | 2 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 69 | 69 | 69 | 104 | 12 | 87 | 43 | 69 | 62 | 103 | 12 | 69 | 43 | 27 | 69 | 69 | 62 | 41 | 104 | 103 |
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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