Surf Forecasts:
Hanamizu River surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 10s period, S swell with glassy winds.
- Most powerful swell: Saturday 8 Aug, 6PM (local time) - 3ft (0.9m), 11s period, SSW swell with 198 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 10s 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 Sunday (Aug 09) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.4m and 12s. 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 0.9m 11s and forecast to arrive on Saturday (Aug 08) at 6PM. 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+) | 3AM (Sun 9th Aug) | 2.5ft (0.8m) 10s |
| Best Surf | 3AM (Sun 9th Aug) | 2.5ft (0.8m) 10s |
| Most Powerful | 6PM (Sat 8th Aug) | 3ft (0.9m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Right, mate, Rusty here. Let’s be straight with you. This 16-day window for Hanamizu River is a tough one. There’s a big blank run of poor conditions right through the first week and beyond, with hardly anything worth paddling out for. The swell is tiny and the wind is usually messy, so you’re going to have to be patient. The water temp is sitting around 80°F right now, which is about average for this time of year, so no surprises there.
The first real glimmer of something surfable, but still ordinary, comes on Monday the 10th of August. Monday afternoon, the wind goes glassy, but the swell is a tiny 2ft from the SSW with a period of 11 seconds. The combined energy is only 98, so it’s weak. It’s surfable but very ordinary. Absolutely nothing to get excited about.
Wednesday the 12th of August, afternoon session shows a similar story – glassy again, but the swell is still only 2ft from the SSW. Energy is down to 71. Still just ordinary.
There’s a long gap from there with nothing but poor surf until Sunday the 16th of August. That morning, the wind is clean and cross-off from the west, with a tiny 1ft SE swell, but a period of 12 seconds. The combined energy is 108, which is moderate, but the wave height is just too small to make it worthwhile. It’s surfable but very ordinary.
Later in the window, on Saturday the 22nd of August, we see a bit of a bump. The afternoon shows a 2ft SSW swell with 11 seconds and a combined energy of 133, which is moderate. However, the wind is blowing cross-onshore at 12 mph, making it choppy. Poor surf conditions, unfortunately.
The best on offer, and I’m scraping the barrel here, is honestly the glassy windows on the 10th and 12th of August. Even then, the waves are tiny and weak. Don’t expect any standouts. This is a quiet period for Hanamizu River.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Warm (max 29°C on Sun afternoon, min 23°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Thu afternoon. Warm (max 28°C on Thu morning, min 24°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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) | S 11 | S 11 | SSW 11 | SSW 10 | SSW 11 | S 10 | S 12 | SSW 11 | S 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 307 | 242 | 191 | 112 | 88 | 77 | 96 | 65 | 74 | 90 | 90 | 82 | 62 | 65 | 64 | 40 | 40 | 38 | 29 | 28 | 63 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | glassy | cross-on | glassy | cross | cross | cross | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | 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 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — |
mm | — | — | — | — | — | — | — | 1 | 4 | — | — | — | 3 | 2 | 2 | 1 | 9 | 3 | — | 1 | 4 |
Temp °C | 28 | 28 | 26 | 28 | 29 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 27 | 27 | 25 | 28 | 28 | 25 | 27 | 27 | 25 |
Feels °C | 31 | 30 | 29 | 31 | 30 | 28 | 29 | 30 | 28 | 26 | 28 | 27 | 29 | 29 | 26 | 27 | 28 | 25 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | SSW 11 | SSW 10 | SSW 11 | S 10 | S 12 | SSW 11 | S 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSE 10 |
| kJ | 307 | 242 | 191 | 112 | 88 | 77 | 96 | 65 | 74 | 90 | 90 | 82 | 62 | 65 | 64 | 40 | 40 | 38 | 29 | 28 | 63 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 12 | ESE 12 | ESE 13 | ESE 13 | SW 12 | SW 11 | SW 11 | E 11 | SE 12 | SE 12 | S 3 | SE 4 | SE 4 | SE 12 | SE 11 | SE 11 | ESE 4 | ESE 6 | SSE 10 | SSW 9 |
| kJ | 11 | 13 | 28 | 34 | 34 | 23 | 20 | 20 | 9 | 5 | 6 | 1 | 2 | 2 | 5 | 5 | 5 | 3 | 3 | 19 | 17 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | ESE 15 | SE 12 | SE 12 | ESE 12 | ESE 12 | ESE 12 | SE 11 | E 10 | E 11 | SE 13 | SE 10 | SE 10 | SE 4 | SE 9 | SE 9 | SE 11 | SSE 11 | SE 6 | ESE 6 |
| kJ | 6 | 6 | 21 | 5 | 5 | 15 | 14 | 13 | 5 | 2 | 2 | 6 | 4 | 4 | 1 | 3 | 3 | 5 | 11 | 1 | 3 |
Wind waves Height (m) Direction Period (s) | — | S 3 | — | — | — | — | — | — | — | — | S 2 | — | ESE 4 | — | — | NNE 3 | — | NE 3 | NNE 3 | ENE 3 | NE 3 |
| kJ | — | 3 | — | — | — | — | — | — | — | — | 1 | — | 6 | — | — | 3 | — | 3 | 5 | 4 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 465 | 13 | 23 | 36 | 0 | 19 | 0 | 34 | 13 | 104 | 0 | 10 | 0 | 10 | 59 | 59 | 59 | 203 | 730 | 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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