Surf Forecasts:
Hanamizu River surf forecast from 28 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 3AM (local time) - 1.5ft (0.5m), 10s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 3PM (local time) - 2.5ft (0.8m), 11s period, SSW swell with 161 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 3AM (local time) - 1.5ft (0.5m), 10s period with SSW 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 (Sep 01) at 3AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.2m and 10s. Another secondary swell of 0.2m and 3s 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 0.8m 11s and forecast to arrive on Wednesday (Sep 02) at 3PM. 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+) | 3AM (Tue 1st Sep) | 1.5ft (0.5m) 10s |
| Best Surf | 3AM (Tue 1st Sep) | 1.5ft (0.5m) 10s |
| Most Powerful | 3PM (Wed 2nd Sep) | 2.5ft (0.8m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
G’day, Rusty here.
Alright, for those who think in feet and miles, let’s break it down for Hanamizu River. There’s nothing happening for a long while. This beach and sandbar break is fairly exposed, and the best swell direction is from the southeast, but we just aren’t getting the right combo. Water temp is about 28°, normal for this time of year.
From Friday 28 August through to the morning of Friday 11 September, the surf is poor. That’s nearly two weeks of flat or junky conditions. Swell heights are tiny – mostly 1 to 3 ft – with short periods of 7 to 11 seconds. The combined swell energy is weak, readings like 82, 42, 17, and 15, and only occasionally hitting moderate numbers (108, 167, 119), but the quality is always poor. Winds are mostly cross or cross-onshore from the south or southwest, making it choppy. There is a glassy moment on Monday 31 August morning with a 0.7 ft swell, but it’s too small to be worth a paddle.
Then on Friday 11 September, something stirs. The morning brings a 4 ft swell from the southeast with a very long period of 18 seconds, and the combined energy jumps to 1045 – strong. Wind is light and cross-offshore from the east-northeast, so it’s clean. But the comments say “marginal surf forecast or questionable tide,” and the score is low. Still, it’s the first real sign of life.
The standout window is Saturday 12 September. The morning has a solid 8 ft swell from the southeast, 18-second period, and massive combined energy of 4348 – that’s very strong. Wind is light cross-onshore from the south, which will put a bit of chop on the face. This is overhead and heavy, for experienced surfers only – beginners stay out. The afternoon bumps to 10 ft, but wind turns moderate and cross-onshore, making it a messy, powerful beast. With that long period, a beach break like this might close out – better suited to a point or reef. Given the size and wind, it looks more like a kite surfing day than a paddle session.
That Saturday 12 September call is over a week out, so it’s promising but not reliable yet. The near-term is a total bust.
That’s the rundown for Hanamizu River.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Sat afternoon. Warm (max 30°C on Fri afternoon, min 21°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 31°C on Thu morning, min 25°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 7 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | S 8 | SSW 10 | SSW 9 | SSW 10 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 62 | 40 | 17 | 18 | 12 | 10 | 10 | 10 | 9 | 29 | 33 | 26 | 56 | 82 | 102 | 161 | 133 | 108 | 118 | 80 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | glassy | glassy | cross-on | cross-off | on | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross-off |
High Tide | 5:27PM1.46m | 4:55AM1.50m | 5:46PM1.49m | 5:33AM1.50m | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | 6:56AM1.40m | 6:47PM1.51m | 7:44AM1.31m | 7:09PM1.49m | 8:44AM1.20m | 7:34PM1.45m | |||||||
Low Tide | 11:08PM0.63m | 11:22AM0.24m | 11:38PM0.52m | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | 12:44PM0.57m | 1:22AM0.32m | 1:10PM0.72m | 2:06AM0.32m | 1:35PM0.87m | ||||||||
 |  |  |  |  | |  |  | |  |  | | | | | | | | | | |
 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — |
 | 6:15 | — | — | 6:15 | — | — | 6:14 | — | — | 6:12 | — | — | 6:10 | — | — | 6:08 | — | — | 6:07 | — |
mm | — | 3 | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 28 | 24 | 23 | 22 | 23 | 24 | 24 | 27 | 28 | 27 | 28 | 28 | 26 | 28 | 28 | 27 | 31 | 31 | 27 |
Feels °C | 33 | 31 | 27 | 23 | 23 | 25 | 27 | 27 | 30 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 32 | 32 | 29 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSE 10 | SSW 10 | SSW 9 | SSW 10 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 |
| kJ | 9 | 40 | 17 | 18 | 12 | 6 | 6 | 6 | 5 | 9 | 33 | 26 | 56 | 82 | 102 | 161 | 133 | 108 | 118 | 80 |
Swell 2 Height (m) Direction Period (s) | SE 15 | SSE 10 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | S 12 | SSW 11 | SSW 11 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 12 | SE 7 | SE 7 | SE 7 |
| kJ | 8 | 9 | 11 | 12 | 10 | 10 | 10 | 10 | 9 | 12 | 12 | 23 | 4 | 4 | 4 | 4 | 30 | 7 | 7 | 12 |
Swell 3 Height (m) Direction Period (s) | SW 9 | SE 13 | — | SSW 8 | SSW 8 | E 6 | E 6 | E 6 | S 4 | E 13 | SSE 9 | SSE 10 | E 11 | E 11 | E 10 | E 10 | SE 9 | SE 10 | SSE 10 | SE 10 |
| kJ | 3 | 7 | — | 11 | 12 | 1 | 1 | 1 | 1 | 3 | 9 | 9 | 10 | 2 | 2 | 2 | 3 | 4 | 9 | 4 |
Wind waves Height (m) Direction Period (s) | SSW 7 | — | — | NE 2 | NE 3 | — | — | — | — | S 8 | SSW 4 | — | — | — | — | — | — | — | S 3 | — |
| kJ | 62 | — | — | 1 | 1 | — | — | — | — | 29 | 4 | — | — | — | — | — | — | — | 4 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 12 | 10 | 69 | 101 | 465 | 80 | 41 | 41 | 41 | 104 | 12 | 43 | 62 | 3 | 43 | 104 | 104 | 77 | 493 | 0 |
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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