Surf Forecasts:
Hanamizu River surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 12AM (local time) - 3ft (0.9m), 11s period, SSW swell with cross-offshore winds.
- Most powerful swell: Saturday 8 Aug, 9PM (local time) - 3.5ft (1.0m), 11s period, S swell with 231 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 3ft (0.9m), 11s 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 Sunday (Aug 09) at 12AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.3m and 12s. 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 1.0m 11s and forecast to arrive on Saturday (Aug 08) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Aug 14) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 9th Aug) | 3ft (0.9m) 11s |
| Best Surf | 12AM (Sun 9th Aug) | 3ft (0.9m) 11s |
| Most Powerful | 9PM (Sat 8th Aug) | 3.5ft (1.0m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, grab your wettie and let’s have a proper look at the forecast for the next couple of weeks.
Honestly, mate, it’s a tough stretch ahead. The surf is going to be small and the winds are going to be messy for most of it. We’re looking at a long, flat spell up front that stretches for over a week. The first real glimmer of hope doesn’t show up until the morning of Saturday the 16th, and even then it’s pretty marginal. We’ll get a few small pulses of energy, but nothing that’s going to have you calling in sick to work.
The focus is all on Hanamizu River, a beach/sandbar setup that’s fairly consistent but is going to be starved for swell. The water temp is sitting right on average for this time of year, so no surprises there.
The early going through the 8th and up to the 15th is a write-off. We’ve got waves barely pushing 2ft to 3ft with cross-onshore winds. The energy is weak, with values mostly under 200, and the periods are short, under 11 seconds. It’s choppy, messy, and just not worth the paddle out. The few days with a cross-offshore wind are still plagued by tiny swell and strong winds, so it’s not going to be clean.
The first thing that even resembles a surf comes on the morning of Saturday the 16th. The swell jumps slightly to 2ft from the ESE with a period of 13 seconds and a light cross-offshore breeze. The energy is moderate at 143. It’s surfable, but ordinary. The afternoon is a bit better with a clean, gentle breeze, but the swell stays small. This is a soft, mushy option for a log, not a performance wave.
From the 17th through to the 23rd, we’re back to small and mostly poor. The swell stays under 3ft, with periods all over the place. We get a few glassy moments, like the morning of the 17th and the 20th, but the swell is just too weak and short-period to offer anything decent. The energy levels are mostly weak, dipping below 100. There’s a slight bump in size on the afternoon of the 19th, hitting 4ft, but it’s from the SSW with a short 6-second period and a cross-onshore wind, so it’ll be a junky, bumpy mess.
Stick to the skatepark for now. The best bet is that small, clean window on the 16th if you’re desperate for a splash. But don’t get your hopes up.
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Mon night. Warm (max 28°C on Sat afternoon, min 22°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Warm (max 29°C on Thu morning, min 24°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the NNE by Fri morning). | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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) | S 11 | SSW 11 | SSW 10 | SSW 10 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSE 11 | SSE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 242 | 191 | 112 | 115 | 77 | 62 | 93 | 58 | 62 | 161 | 58 | 60 | 62 | 63 | 58 | 39 | 37 | 28 | 37 | 41 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-on | cross-on | glassy | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:24PM1.19m | 11:07PM1.33m | 4:05PM1.31m | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | 3:16AM1.49m | 5:31PM1.47m | 4:10AM1.55m | 5:55PM1.48m | 4:59AM1.57m | 6:17PM1.48m | |||||||
Low Tide | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | 10:28AM0.00m | 10:44PM0.87m | 11:08AM0.03m | 11:20PM0.74m | 11:43AM0.11m | 11:56PM0.62m | |||||||
 |  |  |  | | |  |  |  | |  | | | | | |  | |  |  | |
 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — |
 | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — |
mm | — | — | — | — | — | — | 1 | 5 | 2 | — | — | 4 | 2 | — | — | 2 | 2 | — | 8 | 17 |
Temp °C | 28 | 26 | 28 | 28 | 27 | 27 | 27 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 29 | 29 | 26 | 28 | 26 | 24 |
Feels °C | 30 | 30 | 31 | 31 | 29 | 29 | 30 | 27 | 26 | 27 | 27 | 28 | 26 | 26 | 29 | 30 | 26 | 27 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSW 11 | SSW 10 | SSW 10 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | SE 12 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSE 11 | SSE 10 |
| kJ | 242 | 191 | 112 | 115 | 77 | 62 | 93 | 58 | 62 | 6 | 58 | 60 | 62 | 63 | 58 | 39 | 37 | 28 | 37 | 41 |
Swell 2 Height (m) Direction Period (s) | ESE 12 | ESE 12 | ESE 13 | ESE 13 | SW 12 | SW 12 | ESE 12 | E 11 | SE 12 | E 11 | SE 13 | S 4 | SSE 5 | SSE 4 | SE 11 | SE 11 | S 13 | SSE 12 | SSW 9 | SE 6 |
| kJ | 13 | 28 | 34 | 34 | 23 | 21 | 14 | 9 | 6 | 2 | 6 | 3 | 9 | 4 | 5 | 5 | 13 | 13 | 29 | 10 |
Swell 3 Height (m) Direction Period (s) | SE 12 | ESE 15 | SE 12 | SE 12 | ESE 12 | ESE 12 | SE 11 | SE 11 | E 10 | SE 13 | SE 10 | SE 10 | SE 10 | SE 12 | S 9 | — | SE 12 | ESE 6 | E 8 | SSW 9 |
| kJ | 6 | 21 | 5 | 5 | 14 | 14 | 5 | 5 | 2 | 26 | 4 | 4 | 4 | 5 | 2 | — | 5 | 3 | 1 | 17 |
Wind waves Height (m) Direction Period (s) | S 3 | — | — | — | — | — | — | — | — | SSW 11 | S 4 | ENE 3 | ESE 5 | — | NNE 3 | — | — | NE 3 | E 3 | NE 3 |
| kJ | 4 | — | — | — | — | — | — | — | — | 161 | 8 | 2 | 9 | — | 3 | — | — | 4 | 5 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 465 | 0 | 10 | 36 | 0 | 19 | 10 | 59 | 13 | 104 | 12 | 19 | 19 | 0 | 19 | 59 | 20 | 101 | 123 | 123 |
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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