Surf Forecasts:
Hanamizu River surf forecast from 26 Jul 2026:
- Most powerful swell: Sunday 2 Aug, 3PM (local time) - 1.5ft (0.4m), 14s period, SE swell with 46 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 0.4m 14s and forecast to arrive on Sunday (Aug 02) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Sun 2nd Aug) | 1.5ft (0.4m) 14s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, this is Rusty.
For the next week and a half, Hanamizu River is a dead zone. Almost eight days of flat, bumpy junk. Water temp is a balmy 81°, right where you'd expect for this time of year, so at least the swim is good.
Around Wednesday, August 3rd, things start to stir. You’ll see a small bump, maybe 2ft, from the east-southeast, with energy climbing to moderate levels. By the afternoon, the wind goes light offshore and the period stretches out to a very long 16 seconds. That’s proper groundswell. For a river mouth, that long period can sometimes make things a bit straight, but it's the first real sign of hope. Surf quality is still just marginal.
The one true standout, the one you need to mark on your calendar, is Thursday, August 6th. The early morning shows a solid 7ft swell from the southeast, with a long 17-second period and very strong energy. The wind is a light cross-onshore, not perfect. Then the afternoon is the real deal: the swell hits 8ft, still a long 17-second period, and the wind shifts to a light offshore from the south-southeast. The energy goes through the roof. This is big, powerful surf for experienced surfers only. If you’ve got the skills and can handle a clean, pulsing river mouth, that Thursday afternoon is your best bet in the whole 16-day window.
After that, Friday the 7th into Saturday the 8th, it gets too big. We're talking 13ft waves with insane energy. Saturday morning is glassy, but that size is a washing machine at this spot, way too much for anyone but a madman.
For the week before, specifically the morning of Tuesday, July 28th, there is one moment of glassy conditions, but with a tiny 1ft swell. It’s flat, but the ocean will look like a mirror. Not worth paddling.
Keep your eyes on Thursday the 6th. That's your one shot.
- Rusty
Short Range ForecastHeavy rain (total 25mm), heaviest during Sun night. Warm (max 28°C on Sun morning, min 24°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Fri night. Warm (max 30°C on Fri morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | |||||||||||||||
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) | SE 15 | SE 11 | SE 11 | SE 10 | SE 14 | SSW 8 | SE 10 | SE 10 | SSW 8 | SSW 8 | S 7 | SSW 7 | SSW 7 | S 3 | SSW 4 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | ESE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 18 | 20 | 16 | 34 | 23 | 15 | 15 | 14 | 22 | 22 | 17 | 11 | 6 | 9 | 21 | 14 | 13 | 7 | 13 | 20 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross | cross-on | on | glassy | cross-on | cross-off | glassy | cross-on | glassy | cross-on | cross-on | cross-off | cross-on | cross-on | glassy | cross | cross-on | cross |
High Tide | 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 | 5:00AM1.48m | 6:35PM1.44m | 5:38AM1.47m | 6:56PM1.46m | ||||||||
Low Tide | 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 | 11:50AM0.15m | 00:04AM0.75m | 12:19PM0.20m | 00:38AM0.68m | ||||||||
 |  |  |  |  | | | | | | |  | | | | | |  | | |  | |
 | 4:46 | — | — | 4:47 | — | — | 4:48 | — | — | 4:48 | — | — | 4:48 | — | — | 4:50 | — | — | 4:50 | — | — |
 | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — |
mm | — | 8 | 7 | 1 | — | 5 | — | 3 | 1 | — | — | — | — | — | — | — | — | 1 | — | 1 | 10 |
Temp °C | 28 | 27 | 26 | 27 | 28 | 25 | 26 | 26 | 25 | 27 | 28 | 26 | 28 | 28 | 28 | 30 | 30 | 28 | 28 | 29 | 26 |
Feels °C | 31 | 31 | 28 | 29 | 31 | 28 | 29 | 29 | 29 | 29 | 30 | 31 | 29 | 30 | 32 | 33 | 33 | 33 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 15 | SE 11 | SSW 9 | SSW 8 | SE 10 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SE 9 | SSW 7 | SSW 7 | SE 10 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SE 8 | SSW 6 |
| kJ | 8 | 18 | 16 | 14 | 16 | 23 | 15 | 15 | 14 | 22 | 3 | 17 | 11 | 4 | 5 | 21 | 14 | 13 | 7 | 3 | 12 |
Swell 2 Height (m) Direction Period (s) | S 7 | SE 15 | SE 11 | SE 10 | SE 14 | SE 10 | SE 10 | SE 10 | SSW 3 | SE 10 | SSW 8 | SE 9 | SE 9 | SE 12 | SE 9 | SE 9 | S 8 | SE 10 | SE 8 | SE 15 | ESE 14 |
| kJ | 4 | 8 | 18 | 16 | 8 | 16 | 15 | 15 | 1 | 4 | 7 | 3 | 3 | 6 | 3 | 3 | 1 | 4 | 3 | 9 | 20 |
Swell 3 Height (m) Direction Period (s) | SE 11 | S 7 | SSE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 10 | SE 13 | SE 12 | SE 12 | SE 12 | S 8 | S 10 | SE 12 | SE 9 | S 8 | SE 11 | SE 11 | SE 11 |
| kJ | 5 | 4 | 20 | 8 | 29 | 7 | 7 | 7 | 4 | 6 | 6 | 6 | 6 | 1 | 2 | 6 | 3 | 1 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | S 2 | — | — | S 8 | ESE 6 | — | — | — | — | S 7 | — | — | S 3 | SSW 4 | — | SSE 2 | — | — | SSW 6 | — |
| kJ | — | 1 | — | — | 34 | 6 | — | — | — | — | 22 | — | — | 4 | 9 | — | 1 | — | — | 13 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 43 | 12 | 59 | 62 | 62 | 12 | 43 | 12 | 41 | 43 | 69 | 81 | 104 | 103 | 41 | 77 | 463 | 123 | 489 | 69 |
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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