Surf Forecasts:
Hanamizu River surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 9PM (local time) - 5ft (1.5m), 15s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 3AM (local time) - 5ft (1.6m), 14s period, SSE swell with 1,045 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 12AM (local time) - 1.5ft (0.5m), 13s 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 Monday (Aug 24) at 12AM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.3m and 8s. 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 1.6m 14s and forecast to arrive on Tuesday (Aug 25) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 24th Aug) | 1.5ft (0.5m) 13s |
| Best Surf | 9PM (Mon 24th Aug) | 5ft (1.5m) 15s |
| Most Powerful | 3AM (Tue 25th Aug) | 5ft (1.6m) 14s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, crew, Rusty here to break it down for Hanamizu River over the next 16 days. It’s a slow start, but there’s a couple of windows that are gonna scratch the itch.
Right now, it’s tiny and messy. The water’s a warm 81°, which is pretty average for this time of year, so no drama there.
The one that really stands out is Monday, August 24th. The morning session is a glassy dream. We’ve got a 2ft swell from the SSE, but the real story is the 18-second period – that’s a deep-water groundswell packing some punch (477 combined energy). And the wind is glass. Total calm. For a beginner-friendly spot, that’s about as clean as it gets. The long period might make it a bit fat over the sandbar, so look for the deeper lines. And yeah, it can get a few people out there sometimes.
The afternoon of the 24th bumps up to 3ft with even more energy (890), but the wind shifts cross-onshore, so the morning is your window.
Tuesday the 25th has a bit more size, around 5ft from the SSE, but the cross-onshore wind chops it up. The energy is there, but the quality isn’t.
Then we hit a long flat spell. From the 26th of August through the end of the month, it’s small, weak, and poorly winded. A few days, like the 27th morning, have a clean cross-offshore breeze, but the swell is a pathetic 2ft. Not worth it.
We get a pulse on Tuesday, September 1st. The afternoon shows a clean 4ft S swell with a 13-second period and a cross-offshore breeze (506 combined energy). That’s a solid second-week option. The morning of the 1st is a bit onshore, but it cleans up nicely later.
The 2nd and 3rd of September keep the 4ft to 4ft size going, but the winds are stronger and more cross-shore, so it’s only marginal. The energy is building, though (up to 814 combined energy on the 3rd afternoon).
Then a big one hits on September 5th. A solid 7ft SSW swell, but with a short 13-second period and a nasty 22 mph cross-onshore wind. That’s a lumpy, blown-out mess. The energy is massive (2792), but it’s not for paddling. With that much wind and size on a beach break, this is way more of a kite-surfing day than a surf day.
It settles back down after that. The 7th of September finishes with a tiny, glassy 3ft day, but the energy is low (220). A pretty way to end, but not much to ride.
So, bottom line: lock in the morning of Monday, August 24th for that rare glassy groundswell. The afternoon of Tuesday, September 1st is your best long-range bet. The rest is a whole lot of waiting.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun afternoon. Warm (max 32°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Fri morning. Warm (max 31°C on Wed morning, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 | SE 13 | SE 13 | SSE 18 | SSE 17 | SSE 14 | SSE 13 | S 13 | S 13 | S 12 | SSW 13 | SSW 12 | SSW 11 | S 8 | S 8 | S 8 | SSW 8 | SSW 10 | SSW 10 | S 9 | S 8 |
Wave Graph | |||||||||||||||||||||
25 | 27 | 82 | 260 | 486 | 756 | 722 | 653 | 560 | 276 | 786 | 161 | 84 | 51 | 50 | 51 | 109 | 71 | 102 | 60 | 36 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | glassy | cross-on | cross-off | cross-on | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-on | cross-off | cross | cross | cross-off | cross-off | cross | cross-off |
High Tide | 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 | 4:55AM1.50m | 5:46PM1.49m | ||||||||
Low Tide | 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 | 11:22AM0.24m | 11:38PM0.52m | ||||||||
5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | |
— | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:15 | — | — | 6:15 | — | |
mm | — | 1 | — | — | — | — | — | — | 1 | — | — | — | 2 | — | 6 | 6 | — | — | — | 1 | 1 |
Temp °C | 27 | 27 | 26 | 28 | 29 | 27 | 30 | 32 | 26 | 31 | 31 | 28 | 28 | 29 | 26 | 24 | 26 | 26 | 27 | 26 | 24 |
Feels °C | 30 | 29 | 30 | 30 | 32 | 30 | 32 | 35 | 28 | 33 | 32 | 30 | 31 | 33 | 29 | 27 | 29 | 30 | 28 | 29 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 8 | SE 13 | SSE 18 | SSE 13 | SSE 14 | SSE 13 | S 13 | S 13 | S 12 | SSE 9 | SSW 12 | S 8 | S 8 | S 8 | S 8 | SW 11 | SSW 10 | SSW 10 | S 9 | S 8 |
25 | 14 | 82 | 260 | 373 | 756 | 722 | 653 | 560 | 276 | 32 | 161 | 50 | 51 | 50 | 51 | 31 | 71 | 102 | 60 | 36 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 13 | SSW 8 | SSE 12 | SSE 17 | S 16 | S 17 | E 13 | E 13 | SSW 14 | ESE 12 | SSE 9 | SSW 11 | SSW 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 11 | SSE 11 | SSE 10 |
4 | 27 | 14 | 133 | 486 | 438 | 217 | 3 | 3 | 118 | 27 | 32 | 84 | 43 | 9 | 9 | 9 | 8 | 11 | 12 | 11 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 10 | SSE 18 | SSE 15 | ESE 12 | E 15 | E 14 | ESE 13 | ESE 13 | SE 10 | E 12 | E 11 | S 10 | SSE 10 | SW 9 | SE 14 | SE 15 | SE 13 | S 13 | SE 9 | SSE 6 |
7 | 4 | 31 | 84 | 28 | 17 | 4 | 35 | 33 | 25 | 25 | 2 | 16 | 18 | 14 | 8 | 8 | 7 | 3 | 3 | 4 | |
Wind waves Height (m) Direction Period (s) | — | S 4 | — | — | SSW 3 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 13 | SSW 5 | — | — | SW 3 | SW 3 | SSW 8 | SSW 4 | — | — | — |
— | 1 | — | — | 3 | 13 | 9 | 28 | 22 | 5 | 786 | 40 | — | — | 3 | 2 | 109 | 9 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 69 | 62 | 0 | 0 | 104 | 0 | 13 | 493 | 0 | 13 | 493 | 0 | 0 | 13 | 0 | 10 | 13 | 0 | 19 | 19 | 12 |
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.











