Surf Forecasts:
Hanamizu River surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 6AM (local time) - 5.5ft (1.7m), 11s period, SSE swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 12AM (local time) - 10ft (3.0m), 11s period, S swell with 2,241 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 6PM (local time) - 2ft (0.6m), 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 Friday (Sep 04) at 6PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.3m and 6s. 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 11s and forecast to arrive on Tuesday (Sep 08) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Sunday (Sep 06) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 4th Sep) | 2ft (0.6m) 10s |
| Best Surf | 6AM (Mon 7th Sep) | 5.5ft (1.7m) 11s |
| Most Powerful | 12AM (Tue 8th Sep) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Hey, Rusty here. Let’s look at what’s coming up.
Gotta be honest, it starts off real slow. Friday the 4th and Saturday the 5th are duds. Tiny swell, barely 2 ft, with weak energy and winds that just aren’t making anything rideable. You're looking at a couple of days where the surf is basically a no-show.
Here’s the big one. Monday the 7th at Hanamizu River is the clear standout. The morning session is the one. We’ve got a 5 ft SSE groundswell rolling in with a solid 11-second period, and the wind is dead calm – glassy. That’s gonna make for some clean, fun waves. The combined energy jumps up to 923 (moderate). For a beach/sandbar, that long-period groundswell can make things a little sectiony, but with glassy conditions, it’ll be smooth. This is the call.
Tuesday the 8th keeps the size (6 ft to 6 ft), but the wind goes cross and cross-onshore, so it gets choppy and less inviting. Still got energy, but not the same quality.
After that, Wednesday the 9th is glassy again with a 4 ft S swell – surfable, but ordinary. Good for a longboard, not a standout.
Then it’s a long, dry stretch. From Thursday the 10th all the way to Saturday the 19th, the swell just vanishes. Mostly under 2 ft, with energy dropping to almost nothing. Winds are often cross-off or glassy, but with no swell, it’s flat. That’s about a 10-day gap with no real surf.
So, the plan is clear: be ready for Monday the 7th at Hanamizu River. That’s the only real action in the whole forecast. The rest is a waiting game.
- Rusty
Short Range ForecastHeavy rain (total 209mm), heaviest during Sun night. Warm (max 27°C on Fri afternoon, min 20°C on Sun morning). Winds increasing (light winds from the NE on Fri morning, strong winds from the N by Sun night). | Days 4-6 Weather SummaryHeavy rain (total 88mm), heaviest during Wed night. Warm (max 26°C on Mon afternoon, min 21°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 10 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSE 8 | SSE 8 | SSE 12 | SSE 11 | SSE 10 | S 11 | S 10 | S 10 | S 11 | S 10 | S 9 | S 9 | S 8 | S 8 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 73 | 70 | 68 | 35 | 27 | 14 | 7 | 23 | 349 | 611 | 734 | 2241 | 596 | 669 | 649 | 318 | 201 | 129 | 49 | 49 | 33 |
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-off | cross-off | cross-off | cross-off | glassy | cross-on | cross | cross | cross | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:22AM1.10m | 8:03PM1.40m | 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 | |||||||||
Low Tide | 1:53PM1.01m | 4:23AM0.38m | 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 | |||||||||
 |  |  |  | |  | | | | |  |  |  | | | |  | | | |  | |
 | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — |
 | — | 6:07 | — | — | 6:05 | — | — | 6:04 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 5:58 | — |
mm | — | 1 | 24 | 14 | 1 | — | 5 | 16 | 148 | 4 | 1 | 6 | 2 | 18 | 17 | 3 | 6 | 31 | 9 | 7 | 2 |
Temp °C | 26 | 27 | 24 | 21 | 21 | 21 | 20 | 21 | 22 | 24 | 26 | 26 | 26 | 23 | 23 | 23 | 23 | 23 | 21 | 20 | 20 |
Feels °C | 28 | 29 | 25 | 20 | 20 | 18 | 16 | 17 | 22 | 28 | 30 | 30 | 30 | 24 | 25 | 27 | 26 | 24 | 20 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSE 8 | SSE 8 | SSE 12 | SSE 11 | SSE 10 | S 11 | S 10 | S 10 | S 11 | S 10 | S 9 | S 9 | S 8 | S 8 | S 8 |
| kJ | 73 | 70 | 68 | 35 | 27 | 14 | 7 | 23 | 349 | 611 | 734 | 970 | 596 | 669 | 649 | 318 | 201 | 129 | 49 | 49 | 33 |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 6 | SSE 6 | SE 9 | ESE 7 | SE 8 | S 8 | S 8 | SE 11 | ESE 9 | S 11 | SE 14 | SSW 11 | SSW 11 | E 18 | E 12 | E 16 | SSW 9 | SSW 9 | — | SE 9 |
| kJ | 7 | 10 | 4 | 12 | 4 | 11 | 5 | 1 | 5 | 300 | 38 | 47 | 128 | 319 | 6 | 3 | 5 | 119 | 27 | — | 3 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SW 10 | SW 9 | SW 9 | E 8 | ESE 11 | E 9 | — | E 8 | — | — | E 12 | E 9 | ESE 9 | E 11 | SE 10 | E 7 |
| kJ | 3 | 3 | 3 | 12 | 3 | 4 | 3 | 3 | 173 | 12 | 40 | — | 6 | — | — | 3 | 2 | 9 | 2 | 17 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 2 | NNE 3 | NNE 3 | NNE 3 | NNE 4 | NNE 4 | N 4 | N 4 | — | S 11 | — | NE 3 | NE 3 | NE 3 | NNE 2 | — | NE 2 | ENE 2 | ENE 2 |
| kJ | — | — | 1 | 7 | 4 | 5 | 17 | 20 | 45 | 10 | — | 2241 | — | 5 | 2 | 2 | 1 | — | 1 | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 0 | 12 | 69 | 484 | 461 | 461 | 527 | 540 | 0 | 13 | 203 | 10 | 33 | 0 | 0 | 0 | 123 | 19 | 527 | 59 |
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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