Surf Forecasts:
Hanamizu River surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 9PM (local time) - 8ft (2.5m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 6PM (local time) - 10ft (3.0m), 10s period, S swell with 1,514 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 9PM (local time) - 8ft (2.5m), 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 Monday (Sep 07) at 9PM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 0.3m and 9s. 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 3.0m 10s and forecast to arrive on Monday (Sep 07) 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 0.9m 4s period and expected on Sunday (Sep 06) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 7th Sep) | 8ft (2.5m) 10s |
| Best Surf | 9PM (Mon 7th Sep) | 8ft (2.5m) 10s |
| Most Powerful | 6PM (Mon 7th Sep) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this stretch is looking pretty grim for a paddle. For the whole 16-day window, we’ve got a run of really small, weak swells, and most of the time the wind is ripping straight across or onshore. It’s a long, quiet spell.
The only real glimmer in this whole period is a short window around Tuesday afternoon, the 8th of September. Hanamizu River is a beach/sandbar setup that’s fairly consistent. It’s a beginner-friendly spot, so when it’s small, it’s usually pretty manageable. The water is sitting at 82°F, which is a touch warmer than normal for this time of year.
That Tuesday afternoon, we’re looking at a tiny 4ft swell from the SSE, but here’s the big saving grace: the wind goes glassy and it’s just a slight air. That’s a major positive for a spot like this. The combined energy is weak though (361), so you’re not getting any grunt. It’s a micro-swell with a period of 9 seconds. The break is fairly exposed, and crowds are possible here, so you might have a few others with the same idea for the only clean, small waves on offer.
The next morning, Wednesday the 9th, also has some potential. The wind is a clean cross-off from the NNE at 6 mph, with a 5ft, 10-second SSW swell (595 combined energy). The afternoon looks even better for wind – glassy again – with a 5ft, 10-second SSW swell (491 combined energy). But it’s heavy rain all day, so you’ll be suiting up for a wet one.
After that, it’s back to the doldrums. From the 10th of September right through to the 20th, the swell drops below 3ft, the energy readings are all two-digit numbers (between 10 and 59), and the wind is either onshore or cross-off with no real power. The 8ft spike on Monday the 7th was a total write-off – fresh cross-onshore wind and lumpy conditions, which is more of a kite-surfing setup than anything for a paddle board.
So, if you’re desperate, point your board at Hanamizu River on Tuesday afternoon the 8th for the cleanest, most glassy option. It’s not a standout of epic proportions, but it’s the only game in town. For everything else, it’s a long wait for the next real pulse.
Rusty.
Short Range ForecastHeavy rain (total 190mm), heaviest during Mon morning. Warm (max 27°C on Mon afternoon, min 20°C on Sun night). Winds decreasing (fresh winds from the N on Sun night, light winds from the SW by Tue morning). | Days 5-7 Weather SummaryHeavy rain (total 341mm), heaviest during Wed afternoon. Warm (max 27°C on Tue afternoon, min 18°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 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) | SSW 9 | SSW 8 | SSE 8 | SE 8 | S 9 | S 10 | S 10 | S 10 | S 10 | SSE 9 | SSE 9 | SSW 10 | SSW 10 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 27 | 14 | 7 | 18 | 108 | 1175 | 1380 | 1024 | 480 | 302 | 166 | 370 | 435 | 258 | 209 | 145 | 66 | 32 | 30 | 28 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross | glassy | glassy | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy |
High Tide | 8:45PM1.32m | 3:36PM1.25m | 10:48PM1.25m | 3:45PM1.33m | 1:09AM1.28m | 4:04PM1.39m | 2:28AM1.38m | 4:25PM1.43m | 3:26AM1.47m | 4:45PM1.46m | 4:15AM1.53m | 5:05PM1.49m | ||||||||
Low Tide | 6:11AM0.37m | 7:15PM1.21m | 7:42AM0.29m | 8:41PM1.09m | 8:43AM0.22m | 9:20PM0.95m | 9:30AM0.17m | 9:53PM0.79m | 10:09AM0.18m | 10:26PM0.63m | 10:43AM0.24m | 10:57PM0.49m | ||||||||
 |  |  |  |  |  | |  | | | | | | | | | | | | | |
 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — |
 | 6:05 | — | — | 6:04 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 5:58 | — | — | 5:57 | — |
mm | — | — | 2 | 19 | 76 | 70 | 12 | 9 | 2 | 1 | 47 | 92 | 88 | 84 | 11 | 5 | 11 | 2 | — | — |
Temp °C | 23 | 23 | 22 | 21 | 21 | 26 | 27 | 26 | 26 | 27 | 25 | 23 | 24 | 22 | 21 | 20 | 19 | 18 | 20 | 21 |
Feels °C | 24 | 23 | 18 | 18 | 19 | 25 | 27 | 30 | 30 | 32 | 29 | 26 | 24 | 23 | 21 | 18 | 17 | 16 | 20 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 8 | SSE 8 | SE 8 | S 9 | — | — | S 10 | S 10 | SSE 9 | SSE 9 | S 7 | SSE 8 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 |
| kJ | 27 | 14 | 7 | 18 | 108 | — | — | 1024 | 480 | 302 | 166 | 156 | 56 | 258 | 209 | 145 | 66 | 32 | 30 | 28 |
Swell 2 Height (m) Direction Period (s) | ESE 7 | ESE 6 | SSW 8 | SSE 8 | ESE 8 | — | — | — | SE 12 | SSW 10 | SSW 9 | SSW 9 | — | SE 8 | — | E 15 | E 16 | E 9 | SE 10 | E 10 |
| kJ | 4 | 4 | 7 | 6 | 47 | — | — | — | 25 | 42 | 69 | 66 | — | 133 | — | 17 | 5 | 2 | 4 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 7 | S 8 | NW 5 | — | — | — | — | E 10 | E 18 | E 12 | — | E 16 | SE 11 | E 15 | E 14 | E 14 | E 15 | — |
| kJ | 3 | 3 | 2 | 1 | 1 | — | — | — | — | 7 | 6 | 3 | — | 5 | 5 | 17 | 16 | 4 | 4 | — |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | NE 4 | NE 4 | NE 4 | S 10 | S 10 | — | — | S 4 | — | SSW 10 | SSW 10 | N 3 | NNE 3 | NE 3 | NNE 3 | N 4 | N 3 | — |
| kJ | — | 3 | 21 | 22 | 20 | 1175 | 1380 | — | — | 10 | — | 370 | 435 | 5 | 8 | 5 | 10 | 9 | 6 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 59 | 461 | 527 | 527 | 527 | 463 | 547 | 112 | 13 | 0 | 0 | 0 | 0 | 76 | 527 | 253 | 444 | 489 | 87 | 62 |
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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