Surf Forecasts:
Hanamizu River surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 9PM (local time) - 5ft (1.5m), 14s period, SSE swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 9PM (local time) - 5ft (1.5m), 14s period, SSE swell with 911 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 3AM (local time) - 2ft (0.6m), 13s period with SSE 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 24) at 3AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.3m and 17s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 1.5m 14s and forecast to arrive on Monday (Aug 24) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 2s period and expected on Sunday (Aug 30) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 24th Aug) | 2ft (0.6m) 13s |
| Best Surf | 9PM (Mon 24th Aug) | 5ft (1.5m) 14s |
| Most Powerful | 9PM (Mon 24th Aug) | 5ft (1.5m) 14s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let’s break down what’s happening at Hanamizu River for the next couple of weeks.
It’s a bit of a mixed bag, and honestly, there’s a long dry spell in the middle. The real standout is Monday morning, the 24th of August – that’s your best chance for a proper surf. After that, things get messy and quiet for a long stretch, with only a couple of hopeful signs right at the end of the forecast.
Monday morning the 24th is the one to circle. Hanamizu River will have a clean 2-foot groundswell from the SSE, with a very long 18-second period. The water temp is about normal for this time of year. Wind is glassy out of the SE at just 3 mph, so it’ll be smooth as glass. The wave energy is moderate at 477, and it’s all coming together for some clean, fun little waves for a beginner-friendly sandbar. This is your window.
By Monday afternoon, the wind shifts south and bumps up to 9 mph, turning cross-on and chopping it up. The swell ticks up a little to 3 feet, but the quality is gone. That’s the end of the good stuff.
From Tuesday the 25th all the way through to the morning of Sunday the 6th of September, it’s a tough watch. Over a week of mostly poor conditions. The swell hangs around at knee-to-waist high or smaller, often with weak energy, and the wind is almost always cross, cross-on, or messy. A couple of glassy moments show up on Thursday the 27th afternoon, but the swell is tiny and short-period. Not worth the paddle. There are even days when the energy drops into the teens – barely a bump.
Finally, on Sunday morning the 6th of September, we see a pulse. A 4-foot S swell with a moderate 13-second period, and light cross-on wind. The energy is moderate at 484, but it’s still just marginal. Monday the 7th is more of the same – surfable but nothing special.
The one that might get you stoked is Tuesday morning, the 8th of September. The wind goes glassy again out of the ENE, and we get a clean 3-foot S swell with a 12-second period. The combined energy is a moderate 308, and it’s looking like good conditions. It’s a long way out, so don’t book the day off yet, but it could be a nice little session if it comes together.
So, bottom line: Monday the 24th morning is your best bet. The rest is a long wait for a couple of maybes. Stay patient.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 32°C on Wed afternoon, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 28mm), heaviest during Thu night. Warm (max 29°C on Thu morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 13 | SSE 18 | SSE 16 | SSE 14 | S 13 | S 12 | S 13 | SSW 12 | SSW 13 | SSW 12 | SSW 11 | SSW 10 | SSW 6 | S 8 | S 8 | S 8 | SW 8 | SSW 9 | SSW 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 82 | 260 | 480 | 615 | 663 | 353 | 534 | 361 | 594 | 119 | 45 | 255 | 88 | 49 | 46 | 50 | 18 | 42 | 24 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | cross-off | cross | cross | cross-off | cross-on | cross | cross-off | glassy | glassy | cross | cross | cross-off | off | cross | cross | cross |
High Tide | 00:27AM1.21m | 4:23PM1.27m | 1:56AM1.27m | 4:35PM1.33m | 2:52AM1.35m | 4:51PM1.38m | 3:36AM1.42m | 5:08PM1.43m | 4:16AM1.47m | 5:27PM1.46m | 4:55AM1.50m | 5:46PM1.49m | |||||||
Low Tide | 8:39AM0.38m | 9:13PM1.05m | 9:21AM0.30m | 9:43PM0.96m | 9:55AM0.23m | 10:11PM0.85m | 10:25AM0.20m | 10:39PM0.74m | 10:54AM0.20m | 11:08PM0.63m | 11:22AM0.24m | 11:38PM0.52m | |||||||
 |  | |  | | | | | |  |  | |  |  | | | |  |  | |
 | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — |
 | 6:22 | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:15 | — | — | 6:15 | — |
mm | 2 | — | — | — | — | — | 1 | — | — | — | 2 | 3 | 13 | — | 1 | 5 | 2 | 2 | 2 |
Temp °C | 26 | 28 | 29 | 27 | 31 | 31 | 27 | 30 | 32 | 28 | 29 | 29 | 23 | 29 | 29 | 27 | 26 | 24 | 23 |
Feels °C | 31 | 31 | 32 | 30 | 33 | 33 | 29 | 33 | 34 | 31 | 34 | 34 | 23 | 31 | 30 | 31 | 29 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 13 | SSE 18 | SSE 13 | SSE 14 | S 13 | S 12 | S 13 | SSW 12 | SSE 9 | SSW 12 | SSW 11 | SSE 10 | SSW 6 | S 8 | S 8 | S 8 | SSW 6 | SSW 9 | SSW 8 |
| kJ | 82 | 260 | 342 | 615 | 663 | 353 | 534 | 361 | 34 | 119 | 45 | 18 | 46 | 49 | 46 | 50 | 12 | 42 | 24 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | SSE 12 | SSE 16 | S 16 | E 14 | S 15 | E 13 | SSE 10 | E 12 | SSE 9 | SE 10 | S 13 | SSW 9 | SSE 10 | SSE 10 | SSE 9 | SW 8 | SSE 11 | SSE 10 |
| kJ | 14 | 133 | 480 | 267 | 4 | 279 | 3 | 38 | 3 | 32 | 24 | 3 | 28 | 9 | 9 | 9 | 18 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | SSE 18 | SSE 15 | ESE 12 | E 15 | ESE 14 | E 13 | ESE 13 | E 12 | ESE 12 | S 10 | S 11 | — | SSE 10 | SW 10 | SW 10 | SE 10 | SSE 11 | E 10 | SE 10 |
| kJ | 31 | 84 | 28 | 38 | 66 | 3 | 33 | 3 | 28 | 19 | 20 | — | 9 | 4 | 4 | 23 | 11 | 7 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | SSW 8 | SSW 4 | SSW 4 | SSW 5 | SSW 4 | SW 4 | SSW 13 | SSW 5 | S 6 | SSW 10 | SSW 6 | — | — | — | — | — | — |
| kJ | — | — | 26 | 10 | 9 | 54 | 26 | 8 | 594 | 48 | 33 | 255 | 88 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 77 | 0 | 13 | 465 | 0 | 13 | 493 | 0 | 0 | 0 | 12 | 76 | 203 | 0 | 59 | 59 | 59 |
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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