
Surf Forecasts:
Hanamizu River surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 9PM (local time) - 6.5ft (2.0m), 14s period, S swell with glassy winds.
- Most powerful swell: Wednesday 5 Aug, 9PM (local time) - 7ft (2.1m), 14s period, SSE swell with 1,748 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9PM (local time) - 6.5ft (2.0m), 14s 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 Thursday (Aug 06) at 9PM. The primary swell is predicted to be 2.0m and 14s period with a secondary swell of 0.8m and 10s. 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 2.1m 14s and forecast to arrive on Wednesday (Aug 05) 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 Wednesday (Aug 12) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 6th Aug) | 6.5ft (2.0m) 14s |
| Best Surf | 9PM (Thu 6th Aug) | 6.5ft (2.0m) 14s |
| Most Powerful | 9PM (Wed 5th Aug) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, let’s talk about Hanamizu River. It’s a beach-and-sandbar setup, fairly exposed, and the best swell direction is from the southeast. Right now, the water’s sitting at 81°, which is pretty much normal for this time of year – no crazy anomaly to worry about.
Honestly, the whole 16-day window looks pretty grim for a proper paddle session. There’s a bit of swell early on, but the conditions are just not cooperating. It’s a long stretch of poor surf.
The biggest pulse comes in on Wednesday, August 5th, with a solid 7ft swell from the SSE, and a very long period of 15 seconds. The combined energy is a massive 2119, which is strong. But here’s the kicker – the wind is a cross-onshore breeze at 9 mph, making it fairly choppy. The score reflects that it’s marginal. That long-period groundswell is better suited for a point or reef, but at a beach sandbar, it can tend to close out straight. Still, if you’re desperate, that’s the biggest lump of the week.
Thursday the 6th drops to 6ft, still from the SSE, but the wind is cross-onshore and the conditions are described as choppy. Not looking good.
Friday the 7th morning shows a slight improvement with an offshore wind from the SE, but the swell is still 6ft and the overall situation is still called marginal. By the afternoon, the wind swings back to cross-onshore and the surf is considered poor.
From Saturday the 9th onward, the swell drops fast. We’re looking at 3ft and smaller, with the combined energy dropping into the hundreds and then the tens. The wind is often cross-off or clean, but there’s just no power in the water. The entire middle of the window, from around August 9th through to August 19th, is a real write-off – days and days of tiny, weak surf with poor conditions. You’d be better off with a longboard, if anything.
The only other faint glimmer is on Thursday, August 20th, when the swell starts to build again. The morning shows a 3ft swell from the south with a 13-second period, and the wind is cross-off and clean. The combined energy is 598. By the afternoon, it builds to 5ft, still from the south, with a light cross-onshore breeze. It’s still only rated as marginal. It’s something to watch, but it’s a long way off and far from certain.
There’s nothing here that’s a true standout. If you had to pick a session, the biggest swell is on the 5th, but with that wind and the long period, it’s a gamble. The morning of the 7th has the best wind, but the swell is smaller. For the rest of it, the setup looks more interesting for a kite surfer than a paddle surfer, given the strong, clean cross-off winds we get later in the period with no swell to match.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Wed afternoon, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue morning. Warm (max 30°C on Sun afternoon, min 24°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the N by Tue morning). | |||||||||||||||||||
Wed 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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) | SSE 15 | SSE 14 | SSE 13 | S 13 | S 14 | S 13 | S 13 | S 13 | SSW 13 | SSW 12 | SSW 12 | S 12 | S 11 | SSW 11 | S 11 | S 11 | SSW 12 | SSW 12 | SSW 12 | SSW 12 |
Wave Graph | ||||||||||||||||||||
2119 | 1387 | 1025 | 1053 | 1348 | 1127 | 1001 | 771 | 554 | 461 | 379 | 184 | 157 | 173 | 89 | 82 | 113 | 169 | 164 | 161 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | glassy | on | cross-on | cross-on | on | cross-on | glassy | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:33PM1.43m | 10:12AM1.09m | 9:05PM1.40m | 12:46PM1.07m | 9:50PM1.36m | 3:24PM1.19m | 11:07PM1.33m | 4:05PM1.31m | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | ||||||||
Low Tide | 3:38AM0.47m | 2:45PM0.88m | 4:53AM0.43m | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | ||||||||
— | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | |
6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 7 |
Temp °C | 30 | 27 | 29 | 29 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 30 | 26 | 29 | 30 | 27 | 25 | 25 | 24 |
Feels °C | 31 | 30 | 32 | 32 | 32 | 32 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 26 | 28 | 26 | 22 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | SSE 15 | SSE 14 | SSE 13 | S 13 | S 14 | S 13 | S 13 | S 13 | SSW 13 | SSW 12 | SSW 12 | S 12 | S 11 | SSW 11 | S 11 | S 11 | SSW 12 | SSW 12 | SSW 12 | SSW 12 |
2119 | 1387 | 1025 | 1053 | 1348 | 1127 | 1001 | 771 | 554 | 461 | 379 | 184 | 157 | 173 | 89 | 82 | 113 | 169 | 164 | 161 | |
Swell 2 Height (m) Direction Period (s) | — | — | ESE 10 | ESE 11 | ESE 10 | ESE 9 | SSE 9 | SSE 8 | ESE 12 | ESE 12 | ESE 12 | SW 12 | SW 14 | SW 15 | SW 14 | SW 13 | SW 14 | SE 12 | SE 13 | SE 13 |
— | — | 116 | 11 | 114 | 148 | 154 | 147 | 14 | 14 | 30 | 73 | 93 | 78 | 69 | 63 | 30 | 5 | 6 | 7 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 10 | ESE 9 | SE 12 | SE 12 | SE 12 | ESE 14 | ESE 13 | ESE 12 | ESE 12 | E 11 | E 11 | E 11 | E 11 | SW 4 |
— | — | — | — | — | — | 117 | 98 | 6 | 6 | 5 | 41 | 33 | 15 | 14 | 3 | 2 | 2 | 2 | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | S 3 | — | — | — | — | NE 2 | — | ENE 2 | — | — | NNE 3 |
— | — | — | — | — | — | — | — | — | 1 | — | — | — | — | 1 | — | 1 | — | — | 3 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 33 | 10 | 17 | 62 | 0 | 36 | 62 | 36 | 10 | 62 | 0 | 19 | 36 | 19 | 123 | 2039 | 112 | 112 | 123 | 465 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











