Surf Forecasts:
Hanamizu River surf forecast from 22 Aug 2026:
- Best quality surf: Monday 24 Aug, 9PM (local time) - 6ft (1.8m), 15s period, SSE swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 9PM (local time) - 6ft (1.8m), 15s period, SSE swell with 1,422 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 6PM (local time) - 1ft (0.3m), 12s period with SE 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 23) at 6PM. The primary swell is predicted to be 0.3m and 12s period with a secondary swell of 0.2m and 14s. Another secondary swell of 0.4m and 8s is also forecast. 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 1.8m 15s and forecast to arrive on Monday (Aug 24) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Aug 25) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 23rd Aug) | 1ft (0.3m) 12s |
| Best Surf | 9PM (Mon 24th Aug) | 6ft (1.8m) 15s |
| Most Powerful | 9PM (Mon 24th Aug) | 6ft (1.8m) 15s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let's get into it. The surf prospects are a bit grim for a while, but there are a couple of glimmers on the horizon if you're patient.
For the next week, forget it. We've got small, weak, and choppy waves. The energy is low, and the winds are all cross or onshore. There's some size on Tuesday the 25th, but it's a messy 1.7m, all chopped up. Not worth paddling out for.
We get a little tease on Friday the 28th with a clean morning, but the swell is a tiny 0.6m. Not enough to bother.
Then it starts to get interesting. On Saturday the 30th, the afternoon shows a 1.6m groundswell from the SSE with a solid 13-second period. The energy is a strong 820. The wind is there, but it's light. This is worth a look.
But the real gem is Sunday morning, the 31st. The swell is still 1.5m, but the wind drops out completely, leaving it glassy. Hanamizu River (Japan) is your spot. The waves will be clean, but, being a sandbar, that longer-period swell might make it a bit walled. Still, for experienced surfers, this is the best conditions we've seen.
After that, it's back to small and ordinary. The week after is mostly forgettable until we look at the end.
The big call is for Saturday the 6th of September. It's a long way out, so don't book your flights yet, but the models are showing a 1.3m S swell with a 13-second period and a strong 844 energy. The wind is only a light cross-shore. This has the makings of a proper session. Mark it on the calendar, but keep in mind, it's over a week away and things can change.
Water temp is about average for the season, so nothing to worry about there.
So, the plan is simple: sit tight for the next week, then hit it on the 31st for the cleanest waves, and keep your fingers crossed for that Saturday the 6th.
Rusty out.
Short Range ForecastModerate rain (total 15mm), heaviest on Sat night. Warm (max 28°C on Sat morning, min 24°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Wed afternoon, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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 9 | SSW 9 | SSW 9 | SSW 9 | SE 13 | SE 13 | S 20 | SSE 17 | SSE 14 | S 13 | S 14 | S 13 | SSW 12 | SSW 12 | SSW 11 | SSW 10 | SSW 5 | SSW 8 | S 7 | SSE 8 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 32 | 32 | 31 | 15 | 27 | 82 | 199 | 1267 | 850 | 1032 | 1196 | 784 | 461 | 598 | 143 | 58 | 56 | 23 | 22 | 19 | 55 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | cross | cross-on | glassy | glassy | cross-on | cross-off | glassy | cross-on | cross-off | cross-on | cross-on | cross-off | cross | cross-on | cross | cross | glassy | cross |
High Tide | 9:51PM1.23m | 4:23PM1.21m | 00:27AM1.21m | 4:23PM1.27m | 1:56AM1.27m | 4:35PM1.33m | 2:52AM1.35m | 4:51PM1.38m | 3:36AM1.42m | 5:08PM1.43m | 4:16AM1.47m | 5:27PM1.46m | |||||||||
Low Tide | 7:42AM0.47m | 8:28PM1.14m | 8:39AM0.38m | 9:13PM1.05m | 9:21AM0.30m | 9:43PM0.96m | 9:55AM0.23m | 10:11PM0.85m | 10:25AM0.20m | 10:39PM0.74m | 10:54AM0.20m | 11:08PM0.63m | |||||||||
 |  |  |  |  | | |  |  | | | | | |  | | |  |  | | | |
 | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — |
 | — | 6:23 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:15 | — |
mm | — | 2 | 6 | 3 | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — |
Temp °C | 28 | 28 | 27 | 27 | 26 | 26 | 27 | 28 | 27 | 29 | 29 | 27 | 29 | 30 | 27 | 29 | 29 | 27 | 28 | 26 | 24 |
Feels °C | 33 | 32 | 32 | 30 | 29 | 31 | 31 | 31 | 31 | 33 | 30 | 29 | 30 | 31 | 29 | 30 | 30 | 30 | 32 | 30 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SE 13 | SSE 12 | SSE 17 | SSE 14 | S 13 | S 14 | S 13 | SSW 12 | SSE 9 | SSW 11 | SSW 10 | SSE 9 | S 5 | S 7 | SSE 8 | S 9 |
| kJ | 32 | 32 | 31 | 15 | 14 | 82 | 199 | 1267 | 850 | 1032 | 1196 | 784 | 461 | 33 | 143 | 58 | 16 | 21 | 22 | 19 | 55 |
Swell 2 Height (m) Direction Period (s) | S 4 | SE 10 | S 5 | S 4 | SE 13 | SSW 8 | SSE 17 | SW 10 | S 16 | E 14 | ESE 13 | E 13 | SE 9 | E 12 | SSE 9 | SSE 9 | — | SSW 8 | SSW 8 | SSW 9 | SSE 9 |
| kJ | 3 | 4 | 4 | 2 | 27 | 23 | 168 | 24 | 438 | 4 | 59 | 3 | 22 | 3 | 33 | 26 | — | 23 | 13 | 15 | 9 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 11 | SE 10 | SE 10 | SE 10 | SSE 16 | S 20 | SSW 8 | E 15 | ESE 14 | SW 10 | ESE 13 | E 12 | E 18 | — | E 11 | — | SSE 10 | SSE 10 | SSE 9 | E 12 |
| kJ | 4 | 5 | 4 | 4 | 4 | 27 | 194 | 7 | 17 | 39 | 15 | 56 | 3 | 6 | — | 2 | — | 9 | 9 | 9 | 11 |
Wind waves Height (m) Direction Period (s) | — | S 5 | — | — | SSE 4 | — | — | — | SW 9 | SW 10 | S 4 | SSW 4 | — | SSW 12 | SSW 5 | SSW 4 | SSW 5 | — | NE 2 | — | — |
| kJ | — | 7 | — | — | 2 | — | — | — | 47 | 46 | 18 | 13 | — | 598 | 37 | 26 | 56 | — | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 77 | 77 | 69 | 41 | 0 | 0 | 77 | 0 | 0 | 77 | 0 | 13 | 77 | 0 | 13 | 77 | 12 | 77 | 41 | 10 |
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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