Surf Forecasts:
Hanamizu River surf forecast from 30 Aug 2026:
- Best quality surf: Thursday 3 Sep, 6AM (local time) - 2.5ft (0.8m), 6s period, SSE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 3AM (local time) - 3.5ft (1.1m), 15s period, S swell with 517 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 6AM (local time) - 2.5ft (0.8m), 6s period with SSE 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 (Sep 03) at 6AM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.3m and 8s. Another secondary swell of 0.1m and 14s 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 1.1m 15s and forecast to arrive on Sunday (Sep 06) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Saturday (Sep 05) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 3rd Sep) | 2.5ft (0.8m) 6s |
| Best Surf | 6AM (Thu 3rd Sep) | 2.5ft (0.8m) 6s |
| Most Powerful | 3AM (Sun 6th Sep) | 3.5ft (1.1m) 15s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what Hanamizu River has cooking for us over the next couple of weeks. Right off the bat, I gotta be straight with you – it’s a slow start. We’re looking at a solid five days of nothing really worth paddling out for, from now through the 4th of September. Tiny, weak swells and just not enough grunt to get excited about.
Things look pretty grim until we hit the morning of the 6th of September. That’s when we start seeing some real change. A proper S swell starts to build, pushing up to 4ft with a long 14-second period. The wave energy jumps up too (491). It's still pretty small, but it's promising.
The standout window here is going to be the 7th and 8th of September. By the morning of Monday the 7th, we’re seeing a nice 4ft swell from the S, with that long period holding at 14 seconds. The energy is getting serious (638), and importantly, we’ve got a clean cross-offshore wind from the NNE. That’s a major positive – it'll keep the surface glassy and the lines clean. It's a beach/sandbar setup, so a long-period S swell can sometimes make things a bit straight, but with the offshores, it could be really fun for a beginner-friendly wave. The water temp is sitting at 82°F, which is pretty normal for this time of year, so no surprises there.
The Tuesday morning of the 8th is another good shout – still 4ft from the S, a little bit of a shorter period (11 seconds), but still clean with that offshore flow. The energy is still solid (439). This is probably your best bet for a solid session. Keep in mind that crowds are *sometimes* an issue here, so get in early.
After that, the swell hangs around for a few more days, but it gets bitty and the winds start to play games. By the 11th of September, the morning looks alright with a clean 4ft S swell and a good 13-second period (543 energy), but it’s a long way out, so treat that as a promising maybe. The following weekend drops right off again.
So, to sum it up: sit tight through the first few days of September. The real action kicks off around the 6th, with the best and cleanest surf likely on the mornings of the 7th and 8th of September. Don’t sleep on it.
Rusty, signing out.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri afternoon. Warm (max 30°C on Thu afternoon, min 22°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 7 | SSW 7 | SSW 7 | SSW 7 | SSE 10 | SSW 9 | E 12 | SSW 9 | SSW 8 | SSW 8 | SE 9 | SSE 6 | SSE 6 | S 4 | SE 6 | SSW 9 | SW 11 | SSE 6 | SSE 6 | SSE 16 | S 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 18 | 11 | 11 | 9 | 15 | 14 | 15 | 14 | 13 | 41 | 33 | 27 | 44 | 16 | 28 | 18 | 14 | 13 | 89 | 391 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | on | cross-off | cross-off | cross-on | glassy | on | cross-on | cross | cross-on | cross-on | cross-off | glassy | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | 6:56AM1.40m | 6:47PM1.51m | 7:44AM1.31m | 7:09PM1.49m | 8:44AM1.20m | 7:34PM1.45m | 10:22AM1.10m | 8:03PM1.40m | 8:45PM1.32m | |||||||||
Low Tide | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | 12:44PM0.57m | 1:22AM0.32m | 1:10PM0.72m | 2:06AM0.32m | 1:35PM0.87m | 3:03AM0.35m | 1:53PM1.01m | 4:23AM0.38m | |||||||||
 | |  | | | |  | |  | | | | | | | |  |  |  | |  | |
 | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — |
 | — | 6:14 | — | — | 6:12 | — | — | 6:10 | — | — | 6:08 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | 1 | 2 | 17 |
Temp °C | 23 | 25 | 25 | 27 | 28 | 25 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 30 | 27 | 29 | 28 | 24 | 22 | 22 | 21 |
Feels °C | 25 | 28 | 28 | 30 | 31 | 27 | 31 | 31 | 31 | 31 | 30 | 31 | 30 | 31 | 30 | 33 | 32 | 26 | 22 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 9 | SSW 8 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSE 6 | SSE 6 | SE 10 | SE 6 | SSW 9 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | S 16 |
| kJ | 18 | 18 | 11 | 11 | 5 | 15 | 14 | 15 | 14 | 13 | 13 | 33 | 27 | 4 | 10 | 28 | 16 | 14 | 13 | 15 | 391 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SE 10 | SE 10 | SE 10 | ESE 7 | E 10 | SSW 8 | SSW 9 | SW 12 | SSW 8 | SSE 6 | SSW 9 | SSW 10 | SSW 10 | SSE 16 | SW 10 |
| kJ | 10 | 10 | 10 | 9 | 9 | 9 | 4 | 4 | 4 | 5 | 2 | 14 | 15 | 6 | 14 | 16 | 15 | 9 | 11 | 89 | 28 |
Swell 3 Height (m) Direction Period (s) | E 11 | SSW 6 | — | E 14 | E 13 | E 13 | E 12 | E 12 | E 11 | SE 10 | E 12 | SE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SW 11 | SSW 8 | SSW 9 | SSW 9 | SE 11 |
| kJ | 2 | 7 | — | 4 | 3 | 3 | 11 | 11 | 10 | 4 | 3 | 3 | 4 | 15 | 4 | 3 | 18 | 7 | 8 | 15 | 30 |
Wind waves Height (m) Direction Period (s) | NNE 2 | — | — | — | — | — | NNE 2 | — | — | — | SE 9 | — | S 4 | S 4 | SSW 4 | — | — | — | — | SSE 6 | N 3 |
| kJ | 1 | — | — | — | — | — | 1 | — | — | — | 41 | — | 14 | 44 | 16 | — | — | — | — | 39 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 76 | 41 | 81 | 123 | 62 | 76 | 76 | 59 | 12 | 41 | 62 | 12 | 77 | 493 | 77 | 43 | 77 | 69 | 59 | 123 | 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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