Surf Forecasts:
Hanamizu River surf forecast from 14 Aug 2026:
- Best quality surf: Monday 17 Aug, 6AM (local time) - 1.5ft (0.4m), 11s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 3PM (local time) - 2.5ft (0.8m), 9s period, ESE swell with 103 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 6AM (local time) - 1.5ft (0.4m), 11s 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 Monday (Aug 17) at 6AM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.3m and 11s 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 9s and forecast to arrive on Saturday (Aug 15) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Aug 19) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 17th Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 6AM (Mon 17th Aug) | 1.5ft (0.4m) 11s |
| Most Powerful | 3PM (Sat 15th Aug) | 2.5ft (0.8m) 9s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, Rusty here again, in feet and miles. Let’s break it down for Hanamizu River.
First things first, we’re looking at a long, dry patch. From now until about the 23rd of August, there’s basically nothing worth paddling for. Swell’s tiny—0.3 to 0.5m is about 1 to 2 feet—and the period is all over the place, with almost no energy behind it. Combined swell energy is weak, mostly in the 30 to 60 range. Winds are a mixed bag of cross, cross-on, and cross-off, and nothing stays clean for long. It’s a real drag.
Then, on Monday the 24th of August, things wake up. A long-period groundswell from the SE hits, pushing 1.1m (about 4 feet) with a 15-16 second period. That’s proper power, with combined energy hitting 683 (morning) and 675 (afternoon)—moderate-strong. That’s the best window of the whole 16 days. Water temp is around 27°, pretty normal for this time of year.
Tuesday the 25th still has some leftover juice, with 0.9m (about 3 feet) and combined energy at 372 (morning) and 279 (afternoon). Wind is light cross-on, so a bit lumpy but doable.
After that, it fades back to tiny—0.3m (1 foot) dribble through the end of the month. The 29th morning is glassy, but the swell is only 0.3m with an 8-second period. Not enough to do anything.
The standout: Monday the 24th and Tuesday the 25th of August. Swell from the SE, which is what this spot likes. Wave height is chest to head high, with long period giving it real shape and punch. But with that 15-second period on a beach/sandbar, it may break a bit straight—so it’s better for experienced surfers. Beginners might find it a little heavy. Winds are light cross-on, so not glassy but manageable. Crowds are *sometimes* an issue here, so expect a few others around.
Most other days? Honestly, it looks more like a kite-surfing zone than a paddle zone.
Get on that late-August swell, it’s your best shot.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Fri night. Warm (max 29°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed night. Warm (max 31°C on Wed afternoon, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
AM | 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 9 | SSW 9 | SSE 10 | SSW 11 | ESE 9 | SE 8 | SSW 9 | S 9 | S 9 | S 9 | S 8 | SE 5 | SE 6 | SE 7 | SSE 8 | SE 7 | SSE 7 | SSE 7 | SSE 7 | SSW 11 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 16 | 29 | 20 | 40 | 103 | 29 | 28 | 39 | 37 | 23 | 22 | 7 | 9 | 11 | 44 | 27 | 20 | 29 | 21 | 22 | 64 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross | on | cross-on | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross-on | cross-off | cross-off | cross | cross-off | cross | cross-on | cross |
High Tide | 6:17PM1.48m | 5:45AM1.54m | 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 | ||||||||
Low Tide | 11:43AM0.11m | 11:56PM0.62m | 12:15PM0.24m | 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 | ||||||||
 | |  |  |  |  | | |  | | | | | | | | | | | |  | |
 | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — |
 | — | 6:34 | — | — | 6:32 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — |
mm | 4 | 7 | 10 | 1 | — | 2 | — | — | — | — | — | 1 | — | — | 2 | — | — | 3 | — | 1 | — |
Temp °C | 28 | 28 | 26 | 28 | 29 | 25 | 27 | 29 | 26 | 27 | 27 | 26 | 29 | 30 | 27 | 29 | 31 | 27 | 28 | 27 | 26 |
Feels °C | 30 | 31 | 29 | 29 | 30 | 27 | 28 | 31 | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 30 | 33 | 29 | 29 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SE 8 | SE 8 | SSW 9 | S 9 | S 9 | S 9 | S 8 | SE 5 | SE 6 | SE 7 | SSE 8 | SE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | S 9 |
| kJ | 16 | 29 | 16 | 40 | 33 | 29 | 28 | 39 | 37 | 23 | 22 | 7 | 9 | 11 | 44 | 27 | 20 | 29 | 21 | 21 | 64 |
Swell 2 Height (m) Direction Period (s) | ESE 6 | SE 11 | SSE 10 | SE 5 | SSW 10 | SSW 9 | SE 7 | SSE 11 | SE 11 | SE 11 | SSE 11 | SSW 8 | SSW 8 | SSE 10 | SE 10 | SE 10 | SSE 10 | SSW 8 | S 10 | SSW 11 | SE 10 |
| kJ | 4 | 5 | 20 | 10 | 34 | 28 | 14 | 12 | 19 | 18 | 11 | 7 | 6 | 10 | 4 | 4 | 9 | 6 | 8 | 22 | 4 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 8 | S 12 | SSE 9 | SE 10 | SE 12 | SSE 12 | E 10 | E 9 | — | E 9 | SE 11 | SE 10 | SSW 8 | SW 8 | SW 9 | SW 8 | S 12 | SE 10 | SE 10 | SE 11 |
| kJ | 11 | 1 | 11 | 16 | 4 | 6 | 14 | 2 | 1 | — | 1 | 4 | 4 | 6 | 2 | 3 | 3 | 3 | 4 | 4 | 29 |
Wind waves Height (m) Direction Period (s) | NNE 3 | ESE 6 | SE 5 | — | ESE 9 | — | — | — | — | — | — | — | — | — | ENE 2 | NE 3 | NE 3 | ENE 2 | ENE 3 | ESE 6 | — |
| kJ | 3 | 7 | 7 | — | 103 | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 1 | 1 | 18 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 59 | 62 | 12 | 19 | 465 | 19 | 27 | 27 | 10 | 59 | 41 | 62 | 69 | 444 | 12 | 112 | 59 | 59 | 69 | 861 | 10 |
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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