Surf Forecasts:
Hanamizu River surf forecast from 25 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 9PM (local time) - 4ft (1.2m), 12s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 12AM (local time) - 4ft (1.2m), 12s period, S swell with 407 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 9PM (local time) - 4ft (1.2m), 12s period with S 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 Tuesday (Aug 25) at 9PM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.1m and 13s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 1.2m 12s and forecast to arrive on Wednesday (Aug 26) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 26) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 25th Aug) | 4ft (1.2m) 12s |
| Best Surf | 9PM (Tue 25th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 12AM (Wed 26th Aug) | 4ft (1.2m) 12s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s talk about Hanamizu River in feet and miles per hour for the next couple weeks.
It’s a pretty rough outlook, no two ways about it. There’s a huge gap – nearly two weeks – before anything even comes close to being worth a paddle. The very first sign of a wave is on Tuesday, 27th August, but it’s just 1ft of SSW swell with a short period of 10 seconds, and the combined energy is a weak 122. The wind is glassy that morning, so it’ll be flat and pretty, but you’ll be bobbing around on almost nothing. Water temp is a warm 81°, which is about average for the year.
From there, it falls apart. The rest of August and the first week of September are filled with poor surf warnings. A couple of moments pop up – a 4ft on Friday morning the 28th with clean cross-off wind, and a 3ft on Sunday the 6th of September – but each one gets a “poor” or “ordinary” tag. The energy is weak, barely hitting 200 for most of them. It’s a real desert.
The one session that stands above the rest is on Tuesday morning, 8th September. We get a 4ft swell from the SSE with a period of 8 seconds and a combined energy of 208, which is moderate. The wind is a light cross-shore from the NE, keeping things mostly clean with just a little texture. For a beach-sandbar spot like Hanamizu River, that’s the best shape and push in the whole forecast. It’s your best bet by a long shot.
Other than that, it’s slim pickings. A couple of glassy mornings on tiny 2ft swells, but nothing with any power.
So, bottom line: you’ve got one real window – Tuesday morning, 8th September. Mark it down. The rest of the time, you’re better off staying dry.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Thu morning. Warm (max 32°C on Tue afternoon, min 24°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sat morning. Warm (max 29°C on Fri afternoon, min 22°C on Sun morning). Wind will be generally light. | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | SSE 12 | S 12 | SSW 12 | SSW 12 | SSW 5 | SW 10 | S 11 | S 10 | SSW 5 | SSW 5 | SSW 6 | S 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | S 13 | S 12 | S 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 298 | 407 | 183 | 137 | 53 | 28 | 55 | 45 | 21 | 50 | 44 | 27 | 19 | 11 | 11 | 10 | 10 | 28 | 68 | 82 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-on | cross | cross-off | cross-off | cross-off | cross | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | glassy |
High Tide | 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 | 5:33AM1.50m | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | |||||||
Low Tide | 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 | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | |||||||
 |  | | |  |  | |  |  | | |  | |  | |  |  | | |  | |
 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — |
 | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:15 | — | — | 6:15 | — | — | 6:14 | — | — | 6:12 | — |
mm | — | 1 | — | — | 1 | 8 | 6 | 1 | — | — | 3 | 5 | 2 | — | 2 | — | — | — | — | — |
Temp °C | 32 | 28 | 30 | 32 | 28 | 25 | 24 | 25 | 29 | 29 | 27 | 23 | 23 | 23 | 22 | 23 | 23 | 26 | 27 | 26 |
Feels °C | 34 | 31 | 33 | 34 | 31 | 28 | 27 | 28 | 32 | 32 | 30 | 25 | 24 | 25 | 24 | 25 | 25 | 28 | 29 | 31 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 12 | SSW 12 | SSW 12 | SSW 11 | S 6 | S 6 | S 10 | S 9 | SSE 9 | SSW 6 | S 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | S 13 | S 12 | S 11 |
| kJ | 298 | 407 | 183 | 137 | 47 | 15 | 16 | 45 | 14 | 8 | 44 | 27 | 19 | 11 | 11 | 10 | 10 | 28 | 68 | 82 |
Swell 2 Height (m) Direction Period (s) | S 14 | E 13 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | S 11 | SSE 10 | SSE 9 | SE 15 | SSE 10 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 13 | SSW 12 |
| kJ | 243 | 3 | 48 | 47 | 31 | 28 | 55 | 9 | 8 | 8 | 9 | 11 | 12 | 10 | 10 | 10 | 10 | 10 | 16 | 28 |
Swell 3 Height (m) Direction Period (s) | E 13 | ESE 13 | SSW 5 | E 12 | S 10 | SW 10 | SSE 10 | SW 9 | SW 9 | E 12 | SE 13 | — | SSW 8 | SSW 8 | SSW 7 | — | SW 10 | SSW 14 | SSE 10 | S 16 |
| kJ | 3 | 33 | 9 | 3 | 19 | 25 | 18 | 3 | 3 | 11 | 7 | — | 12 | 11 | 11 | — | 4 | 19 | 9 | 20 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 5 | SW 4 | SSW 4 | SSW 5 | — | — | S 6 | SSW 5 | SSW 5 | — | NE 3 | NNE 3 | — | — | — | — | SSW 8 | SSW 4 | S 4 |
| kJ | 43 | 29 | 15 | 29 | 53 | — | — | 16 | 21 | 50 | — | 2 | 1 | — | — | — | — | 13 | 13 | 8 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 465 | 0 | 13 | 509 | 0 | 0 | 12 | 76 | 0 | 77 | 0 | 123 | 62 | 69 | 41 | 43 | 77 | 41 | 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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