Surf Forecasts:
Hanamizu River surf forecast from 21 Jul 2026:
- Best quality surf: Thursday 23 Jul, 3AM (local time) - 3ft (0.9m), 6s period, SW swell with offshore winds.
- Most powerful swell: Monday 27 Jul, 6AM (local time) - 4ft (1.2m), 6s period, SSE swell with 87 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 3AM (local time) - 3ft (0.9m), 6s period with SW 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 (Jul 23) at 3AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.6m and 5s. Another secondary swell of 0.1m and 11s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 1.2m 6s and forecast to arrive on Monday (Jul 27) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Jul 27) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 23rd Jul) | 3ft (0.9m) 6s |
| Best Surf | 3AM (Thu 23rd Jul) | 3ft (0.9m) 6s |
| Most Powerful | 6AM (Mon 27th Jul) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s shaping up for the Hanamizu River area. I gotta be straight with you – the next week and a half is looking pretty bleak. We’ve got a long stretch of nothing but small, weak, and messy conditions. The first real surfable day that’s worth paddling out for doesn’t show up until Saturday, August 3rd, which is over a week away. Before that, expect a whole lot of flat, choppy, or just plain ugly water.
The Early Days (July 22nd – August 2nd): Honestly, don’t bother. The combined swell energy is barely a whisper, with values in the teens and twenties, and the wave heights are mostly under 2 ft. The wind is onshore or cross-onshore for the bulk of it, chopping up any tiny lumps that appear. There are a few brief moments of glassy conditions on the afternoon of July 26th and the morning of July 27th, but the swell is still so small and weak it’s not worth suiting up. The water temp is about average for this time of year, so nothing weird there.
The One to Watch (August 3rd – Monday morning): This is it. The only real standout in the entire 16-day window. On Monday morning, August 3rd, we see a pulse of 6 ft S swell rolling in, with a very long period of 16 seconds. The combined energy hits a strong 1474, which tells you there’s some serious power behind it. The wind is light and onshore from the SE, but that’s a major caveat. That long-period groundswell from the south is going to be hitting the river mouth with a lot of energy. With a period over 15 seconds, it’s going to barrel straight and fast, making it tricky on a beach/sandbar setup. This is solidly in the expert territory at over 5 ft, so beginners should stay well clear. The afternoon gets a bit messier with cross-onshore winds, but the morning has the best potential. It’s the only real chance at a decent wave in this forecast.
The Fade-Out (August 4th – 6th): After that Monday pulse, the swell drops back down. Tuesday, August 4th, has some size (5 ft to 5 ft) but strong NE winds in the 25 mph range will blow it out. By Wednesday and Thursday, the wind is howling from the NNE at 35 to 40 mph, making it unsurfable and more interesting for kite surfers than paddle surfers. The swell is still there, but the conditions are a mess.
So, the short story: save your energy for Monday morning, August 3rd. It’s not perfect, but it’s the only shot we’ve got. The Hanamizu River can sometimes be inconsistent, and this is one of those quiet stretches. Don’t sweat it – forecasts can always change.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 32°C on Thu afternoon, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 24mm), heaviest during Sun morning. Warm (max 27°C on Fri night, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
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 4 | SSW 4 | S 4 | SSW 5 | SSW 6 | SSW 6 | SSE 10 | SSE 9 | SSE 9 | SE 11 | SE 10 | SE 10 | SSE 15 | SE 15 | SE 11 | SE 5 | SSE 6 | SE 10 | SE 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 11 | 11 | 7 | 19 | 15 | 13 | 12 | 12 | 11 | 18 | 15 | 15 | 22 | 8 | 18 | 50 | 28 | 16 | 16 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-off | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-off | cross-off | cross | cross | glassy | cross | glassy | cross-off | cross |
High Tide | 9:12PM1.37m | 10:59AM1.01m | 9:42PM1.35m | 1:53PM1.02m | 10:23PM1.31m | 4:27PM1.11m | 11:26PM1.28m | 4:24PM1.19m | 00:48AM1.28m | 4:44PM1.26m | 1:59AM1.31m | 5:07PM1.31m | 2:54AM1.37m | ||||||
Low Tide | 4:27AM0.55m | 3:05PM0.90m | 5:40AM0.52m | 3:14PM1.02m | 6:57AM0.47m | 5:02PM1.11m | 8:03AM0.40m | 7:57PM1.13m | 8:56AM0.32m | 9:09PM1.09m | 9:39AM0.25m | 9:52PM1.04m | |||||||
 |  | |  | | | |  | | | | |  |  |  |  | |  |  | |
 | — | 4:43 | — | — | 4:43 | — | — | 4:45 | — | — | 4:45 | — | — | 4:46 | — | — | 4:47 | — | — |
 | 6:54 | — | 6:53 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — |
mm | 1 | — | — | — | — | — | 3 | — | — | 4 | — | — | 4 | 4 | 3 | 6 | — | 3 | — |
Temp °C | 29 | 30 | 31 | 29 | 31 | 32 | 28 | 27 | 27 | 27 | 25 | 26 | 24 | 24 | 23 | 25 | 26 | 26 | 25 |
Feels °C | 33 | 34 | 36 | 33 | 35 | 36 | 34 | 31 | 30 | 32 | 26 | 27 | 25 | 27 | 27 | 28 | 31 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SSW 4 | SE 8 | SE 11 | SSW 6 | SE 10 | S 5 | SSW 6 | SSE 9 | SE 11 | SE 10 | SE 10 | SE 10 | SSE 5 | SSE 5 | SSW 9 | SSE 6 | SSE 6 | SSW 8 |
| kJ | 2 | 3 | 2 | 5 | 12 | 4 | 4 | 4 | 8 | 18 | 15 | 15 | 15 | 2 | 2 | 16 | 28 | 12 | 14 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 8 | SE 11 | S 7 | SSE 10 | S 8 | SSE 10 | SSE 9 | SE 17 | SE 16 | SE 16 | SE 16 | SSE 15 | SE 15 | SE 11 | SE 5 | SSW 9 | SSW 9 | SE 6 |
| kJ | 4 | 2 | 5 | 1 | 10 | 1 | 9 | 8 | 11 | 10 | 10 | 10 | 22 | 8 | 18 | 7 | 16 | 15 | 5 |
Swell 3 Height (m) Direction Period (s) | — | SE 11 | — | SE 7 | SE 19 | S 19 | SE 18 | SE 18 | SE 11 | S 5 | S 7 | S 7 | S 8 | SE 11 | S 9 | S 5 | SE 10 | SE 10 | SE 10 |
| kJ | — | 4 | — | 2 | 15 | 7 | 12 | 12 | 5 | 2 | 1 | 1 | 1 | 5 | 7 | 4 | 16 | 16 | 16 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 4 | S 4 | SSW 5 | — | SSW 6 | — | — | SSW 2 | ESE 3 | — | NE 3 | E 3 | — | SE 4 | SE 5 | — | NNE 3 | NNE 3 |
| kJ | 11 | 11 | 7 | 19 | — | 13 | — | — | 2 | 1 | — | 1 | 1 | — | 10 | 50 | — | 5 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 77 | 77 | 1417 | 77 | 41 | 43 | 69 | 69 | 253 | 12 | 69 | 59 | 69 | 12 | 12 | 13 | 10 | 41 | 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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