Surf Forecasts:
Hanamizu River surf forecast from 16 Jul 2026:
- Most powerful swell: Monday 20 Jul, 6PM (local time) - 2.5ft (0.8m), 4s period, S swell with 19 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 0.8m 4s and forecast to arrive on Monday (Jul 20) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Mon 20th Jul) | 2.5ft (0.8m) 4s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Right, I’ve had a look at the forecast for Hanamizu River. To be straight with you, it’s looking like a pretty quiet start for the next week or so. The swell is tiny and the wind is mostly onshore or cross-onshore, so we’re looking at a lot of days with poor surf conditions. The water temp is about what you’d expect for this time of year, nothing weird there.
The first real glimmer of hope shows up on Saturday, July 26th. We’ve got a bit of a lift in the water with a swell coming from the SSE at around 3ft to 5ft, but it’s still a bit on the small side and the wind is still cross-onshore, so it’s more of a *maybe* session than a standout. The combined energy starts to kick up a bit, but it’s not clean enough to get excited about.
Now, the standout window is definitely Tuesday, July 28th. The morning is looking magic. We’ve got glassy conditions, zero wind, and a solid 10ft swell from the SSE with a very long period of 15 seconds. That’s proper groundswell, plenty of energy, and it’ll be clean. That said, this is a beach/sandbar setup, and a long-period swell like that can sometimes be a bit straight and tricky to handle, but for the experienced surfer, that’s your moment. The afternoon pushes even bigger to 12ft, but the wind swings cross-onshore, and the file says it might be too big for this break, so stick to the morning.
Wednesday, July 29th keeps the size with a 13ft swell from the SSW in the morning, but the wind is cross-onshore again, and it’s a big, powerful swell. This is expert-only territory, and the conditions aren’t perfect. It’s a bit of a beast.
After that, it drops off quickly. By Thursday, July 30th and into the first of August, the swell fades back to dinky little waves with poor wind, so it’s back to waiting. The first week is a write-off, then we get a short, punchy window of big, expert-level swell mid-week, then it’s gone. If you’re a beginner, don’t bother. For the experienced crew, the Tuesday morning (July 28th) is the pick of the lot.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Fri morning. Warm (max 28°C on Thu night, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Tue afternoon. Warm (max 29°C on Tue morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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 8 | SSW 8 | SSW 8 | SSE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SSE 9 | S 4 | SSW 4 | SSE 8 | S 4 | SSW 4 | SSW 4 | S 6 | SE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 13 | 6 | 6 | 8 | 12 | 11 | 10 | 9 | 9 | 6 | 8 | 12 | 8 | 6 | 12 | 9 | 3 | 6 | 5 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | on | on | on | cross-on | cross-on | on | cross-on | cross | on | cross-on | cross-off | on | cross-on | cross-off | glassy | cross-on | cross-off |
High Tide | 5:45AM1.54m | 7:33PM1.44m | 6:35AM1.46m | 7:58PM1.42m | 7:26AM1.35m | 8:23PM1.40m | 8:21AM1.23m | 8:47PM1.39m | 9:26AM1.10m | 9:12PM1.37m | 10:59AM1.01m | 9:42PM1.35m | |||||||
Low Tide | 00:17AM0.86m | 12:43PM0.08m | 1:00AM0.77m | 1:19PM0.24m | 1:45AM0.69m | 1:50PM0.42m | 2:33AM0.63m | 2:19PM0.59m | 3:26AM0.59m | 2:44PM0.76m | 4:27AM0.55m | 3:05PM0.90m | |||||||
 |  | |  |  | |  | | | |  | | | | |  | | | | |
 | — | 4:39 | — | — | 4:39 | — | — | 4:41 | — | — | 4:41 | — | — | 4:41 | — | — | 4:43 | — | — |
 | 6:58 | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — |
mm | — | 3 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 1 | 3 |
Temp °C | 28 | 28 | 27 | 26 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 28 | 27 | 29 | 29 | 28 | 29 | 29 | 27 |
Feels °C | 32 | 32 | 30 | 30 | 30 | 29 | 28 | 30 | 29 | 29 | 30 | 32 | 31 | 33 | 32 | 32 | 34 | 33 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | SSE 9 | SSE 4 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SSE 9 | SE 11 | SSE 8 | SSW 4 | SSE 8 | SSE 8 | SSW 4 | SE 11 | S 4 |
| kJ | 13 | 6 | 6 | 8 | 2 | 11 | 10 | 9 | 9 | 6 | 8 | 5 | 7 | 2 | 6 | 6 | 3 | 5 | 2 |
Swell 2 Height (m) Direction Period (s) | SSE 4 | SSE 4 | SE 9 | SSW 8 | SE 9 | S 9 | S 8 | S 8 | E 12 | S 8 | S 7 | SE 9 | E 11 | SSE 8 | E 11 | E 11 | SE 8 | SE 8 | SE 11 |
| kJ | 2 | 2 | 3 | 6 | 12 | 2 | 1 | 5 | 3 | 5 | 4 | 12 | 2 | 6 | 2 | 2 | 2 | 2 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | E 8 | E 10 | SW 7 | S 8 | S 7 | E 12 | — | S 9 | SE 11 | ESE 11 | S 7 | E 11 | ESE 11 | S 12 | S 8 | SE 8 | SE 8 |
| kJ | 4 | 4 | 1 | 2 | 2 | 1 | 1 | 3 | — | 2 | 5 | 12 | 1 | 2 | 12 | 3 | 1 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | S 3 | SSE 4 | — | SSE 3 | S 4 | — | S 3 | S 3 | S 3 | S 4 | SSW 4 | SW 3 | S 4 | SSW 4 | — | S 6 | — |
| kJ | — | — | 5 | 3 | — | 2 | 1 | — | 4 | 2 | 1 | 12 | 8 | 3 | 9 | 9 | — | 6 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 76 | 41 | 509 | 62 | 104 | 62 | 76 | 43 | 104 | 76 | 77 | 104 | 77 | 77 | 104 | 77 | 76 | 77 | 77 |
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.
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