Surf Forecasts:
Hanamizu River surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 16 Aug, 6PM (local time) - 2.5ft (0.7m), 9s period, SE swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 6PM (local time) - 2.5ft (0.7m), 9s period, SE swell with 81 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 6PM (local time) - 2.5ft (0.7m), 9s period with SE 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 Sunday (Aug 16) at 6PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.5m and 9s. Another secondary swell of 0.2m and 11s is also forecast. 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 0.7m 9s and forecast to arrive on Sunday (Aug 16) at 6PM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 16th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 6PM (Sun 16th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 6PM (Sun 16th Aug) | 2.5ft (0.7m) 9s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, let’s call it like it is. Hanamizu River is looking pretty quiet for the next couple of weeks. The first week is mostly a bust – from Saturday the 15th all the way through to the following weekend, you’re staring at tiny, weak, messy waves. There’s a big gap with no real rideable surf for days on end.
Starting Saturday the 15th through Saturday the 22nd, it’s all poor. Swell is between 0.7ft and 2ft at best, with weak energy readings in the low hundreds or less. Wind is onshore or cross-onshore most of the time. Don’t bother.
Sunday the 23rd morning finally gives us something. Hanamizu River (a beach/sandbar setup) picks up 5ft from the SSW, short period, with glassy conditions and a light ENE wind – that’s clean. Combined energy is 126, moderate. Water temp is 82°, about average for the time of year. The wave report says “surfable waves but very ordinary conditions,” so don’t expect much. Crowds show up sometimes. Score is 1 out of 10.
That afternoon it gets choppy – 6ft from the SSW, wind onshore from the S at 9 mph, combined energy 311.
Monday the 24th morning brings a 2ft SSE swell with a very long period of 16 seconds – that’s groundswell with good energy of 484 (moderate). But the wind is light cross-onshore, and at a beach break, that long period can make things straight. Score is 1 out of 10.
Now the real highlight is Tuesday the 25th. Both morning and afternoon show 7ft swell from the SSE, 15-second period. Combined energy is massive – 1957 in the morning, 1838 in the afternoon (strong to very strong). Wind is light cross in the morning from the NE at 3 mph, leaving the surface clean with light chop, and light onshore in the afternoon. At 7ft, this is big – expert only, too much for beginners. The wave comment says “marginal surf forecast or questionable tide conditions,” score 3 out of 10. But this is the most powerful swell of the whole outlook. Just be aware the 15-second period will make it fast and maybe a bit unruly on a beach break.
Wednesday the 26th morning still has 6ft from the SE, 13-second period, combined energy 999 (moderate to strong), but cross-onshore wind from the E at 3 mph. Score 2 out of 10.
After that, from Wednesday afternoon through Sunday the 30th, it falls apart again – tiny, weak, not worth a second look.
Bottom line: Tuesday the 25th is your only real shot at some size and power. For experts only, and keep your expectations in check for a beach break with a long-period groundswell. Everything else is a miss.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Warm (max 29°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Wed afternoon, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | ESE 8 | SE 8 | SSW 9 | S 9 | S 9 | S 9 | ESE 8 | SSW 8 | SE 10 | SE 7 | SE 7 | SE 7 | SE 7 | SSW 8 | SSW 8 | ESE 11 | SSW 8 | S 8 | S 8 | SSW 8 |
Wave Graph | ||||||||||||||||||||
117 | 30 | 28 | 39 | 37 | 23 | 47 | 13 | 16 | 9 | 8 | 7 | 7 | 6 | 6 | 11 | 13 | 10 | 57 | 20 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | on | glassy | cross | on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | on | cross-on | cross | on | cross-on | glassy |
High Tide | 6:38PM1.48m | 6:30AM1.47m | 6:58PM1.47m | 7:14AM1.36m | 7:18PM1.46m | 8:00AM1.24m | 7:37PM1.44m | 8:53AM1.12m | 7:57PM1.41m | 10:11AM1.02m | 8:20PM1.36m | 8:48PM1.29m | ||||||||
Low Tide | 00:33AM0.52m | 12:43PM0.39m | 1:10AM0.46m | 1:08PM0.55m | 1:49AM0.43m | 1:29PM0.70m | 2:31AM0.45m | 1:44PM0.83m | 3:21AM0.48m | 1:46PM0.94m | 4:30AM0.52m | |||||||||
— | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | |
6:32 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:24 | — | |
mm | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 26 | 27 | 26 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 28 | 26 | 26 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 30 | 28 | 28 | 28 | 28 | 28 | 30 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 30 | 29 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SSW 9 | S 9 | S 9 | S 9 | S 8 | SE 6 | SE 10 | SE 7 | SE 7 | SE 7 | SE 7 | SSE 6 | SE 10 | ESE 11 | SSW 8 | S 8 | SE 10 | SSW 8 |
33 | 30 | 28 | 39 | 37 | 23 | 22 | 5 | 16 | 9 | 8 | 7 | 7 | 4 | 4 | 11 | 13 | 10 | 4 | 20 | |
Swell 2 Height (m) Direction Period (s) | S 10 | SSW 9 | SE 7 | SSE 11 | SSE 11 | SSE 11 | SE 11 | SSW 8 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 6 | S 9 | ESE 10 | SE 10 | E 7 | SE 10 |
52 | 28 | 14 | 12 | 12 | 11 | 4 | 13 | 6 | 6 | 4 | 4 | 4 | 4 | 1 | 2 | 11 | 4 | 1 | 4 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 12 | SSE 12 | E 10 | E 8 | E 9 | — | SE 10 | S 15 | SE 10 | SSW 8 | SSW 8 | SW 8 | SSW 8 | SSW 8 | SW 8 | SSW 8 | SE 7 | — | S 9 |
4 | 6 | 14 | 2 | 1 | 2 | — | 4 | 4 | 4 | 6 | 6 | 3 | 6 | 6 | 2 | 13 | 2 | — | 2 | |
Wind waves Height (m) Direction Period (s) | ESE 8 | — | — | — | — | — | ESE 8 | — | — | — | — | — | — | — | — | SSE 6 | SSE 6 | SSE 5 | S 8 | S 4 |
117 | — | — | — | — | — | 47 | — | — | — | — | — | — | — | — | 3 | 3 | 2 | 57 | 11 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 34 | 19 | 27 | 62 | 27 | 59 | 26 | 62 | 69 | 41 | 62 | 69 | 43 | 69 | 69 | 62 | 62 | 41 | 62 | 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.











