
Surf Forecasts:
Hanamizu River surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 9PM (local time) - 11ft (3.5m), 16s period, SSE swell with cross-shore winds.
- Most powerful swell: Thursday 6 Aug, 3AM (local time) - 11ft (3.5m), 17s period, SSE swell with 6,534 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 9PM (local time) - 11ft (3.5m), 16s 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 Wednesday (Aug 05) at 9PM. The primary swell is predicted to be 3.5m and 16s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 3.5m 17s and forecast to arrive on Thursday (Aug 06) 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+) | 9PM (Wed 5th Aug) | 11ft (3.5m) 16s |
| Best Surf | 9PM (Wed 5th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 3AM (Thu 6th Aug) | 11ft (3.5m) 17s |
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 coming up for Hanamizu River. We’ve got a long stretch ahead, but honestly, don’t bother paddling out for the first week or so – it’s pretty grim.
The start of the outlook is dead quiet. Through Thursday, Friday, and Saturday there’s almost nothing doing. Tiny waves with poor surf conditions. It’s a flat spell you can sleep through. Right now at Hanamizu River, water temperature is about average for this time of year – nothing unusual.
We finally see a little pulse of life on Sunday morning, the 2nd of August. The swell bumps to 1 ft from the SE with a very long period of 16 seconds, and it’s glassy. The combined wave energy is weak at just 79, so it’s surfable but barely mushy. That’s not a day to get excited about, but it’s the first real chance to get wet.
Monday the 3rd of August sees a jump in size, but the conditions are a mess. The swell hits 3 ft, period 17 seconds, from the SE. The wind is howling cross-shore at 12 mph from the ENE, creating a cross-chop. Energy is moderate to strong at 494, but the wind ruins it.
Tuesday the 4th of August brings bigger numbers but still messy. Morning swell is 6 ft from the SE, 17 seconds, cross-shore winds. The energy is strong now at 1613, but with marginal tide and question marks, it’s not clean.
Wednesday the 5th of August is the standout of the whole run. This is the best on offer. The swell comes up to 10 ft from the SSE, period 17 seconds – that’s a proper groundswell. Combined energy is very strong at 4998 in the morning, peaking at 5641 in the afternoon. That said, a long period swell like this can break a bit straight at a beach-sandbar setup like Hanamizu River. The wind is cross-offshore from the NE in the morning at 9 mph, which is good, but by afternoon it turns onshore. This size is for experts only – over 8 ft is big, powerful, and not for learners.
Thursday the 6th of August stays solid but messy. 10 ft from the S all day, period 16 seconds, but cross-onshore wind makes it choppy. Energy still very strong around 4900-5000, but the quality is off.
Friday the 7th of August drops slightly to 8 ft from the SSW, period 15 seconds, still very strong energy at 2692. Again, cross-onshore wind keeps it a bit bumpy, but it’s still size.
After that, the swell fades fast. By the 8th and into the second week, the wave heights drop below 3 ft, and we’re back to poor conditions, light wind, and weak energy. Sunday the 9th has a clean moment with cross-offshore wind from the NNE at 12 mph, but the swell is only 3 ft. It’s a letdown after the big stuff.
To sum it up: the only time worth checking is around Wednesday the 5th of August through Friday the 7th, with Wednesday morning being the best bet for experienced surfers who can handle heavy, powerful waves. The rest of the 16-day window is pretty forgettable.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Warm (max 30°C on Fri morning, min 27°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 30°C on Sun morning, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 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 | S 7 | S 6 | SSW 6 | SSW 6 | SSW 7 | SSW 6 | SE 17 | SE 16 | SE 15 | SE 17 | SE 16 | SE 17 | SE 17 | SE 16 | SE 17 | SE 17 | SSE 17 | SSE 17 | SSE 17 |
Wave Graph | |||||||||||||||||||||
18 | 10 | 23 | 22 | 14 | 13 | 9 | 12 | 46 | 64 | 109 | 281 | 386 | 573 | 802 | 1261 | 1972 | 2864 | 4342 | 5259 | 6043 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | off | glassy | cross-on | glassy | glassy | cross-on | glassy | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off |
High Tide | 6:13PM1.42m | 5:00AM1.48m | 6:35PM1.44m | 5:38AM1.47m | 6:56PM1.46m | 6:18AM1.43m | 7:18PM1.46m | 7:00AM1.37m | 7:41PM1.46m | 7:48AM1.28m | 8:05PM1.45m | 8:47AM1.18m | 8:33PM1.43m | ||||||||
Low Tide | 11:21AM0.13m | 11:31PM0.83m | 11:50AM0.15m | 00:04AM0.75m | 12:19PM0.20m | 00:38AM0.68m | 12:47PM0.29m | 1:15AM0.61m | 1:15PM0.41m | 1:55AM0.55m | 1:44PM0.55m | 2:41AM0.50m | 2:14PM0.72m | ||||||||
4:48 | — | — | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | |
— | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | |
mm | — | 1 | — | — | 2 | 1 | — | 1 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 29 | 29 | 28 | 30 | 30 | 28 | 30 | 30 | 28 | 30 | 30 | 26 | 28 | 29 | 26 | 30 | 30 | 27 | 30 | 31 | 27 |
Feels °C | 32 | 31 | 32 | 34 | 33 | 33 | 34 | 33 | 33 | 35 | 33 | 26 | 28 | 29 | 25 | 30 | 30 | 27 | 31 | 33 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | S 7 | S 6 | SSW 6 | SSW 6 | SSW 7 | S 7 | SE 17 | SE 16 | SE 15 | SE 17 | SE 16 | SE 17 | SE 17 | SE 16 | SE 17 | SE 17 | SSE 17 | SSE 17 | SSE 17 |
18 | 10 | 23 | 22 | 14 | 13 | 9 | 1 | 46 | 64 | 109 | 281 | 386 | 573 | 802 | 1261 | 1972 | 2864 | 4342 | 5259 | 6043 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | SE 10 | SE 10 | SE 10 | SE 15 | S 5 | SE 9 | SE 9 | SE 9 | SSE 22 | SE 8 | E 14 | SE 21 | E 13 | — | — | — | — |
4 | 4 | 4 | 3 | 4 | 4 | 4 | 8 | 5 | 3 | 3 | 13 | 47 | 3 | 14 | 865 | 14 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | S 8 | SE 12 | S 8 | S 8 | SE 15 | SE 18 | SSE 9 | S 5 | SSE 10 | — | — | SE 9 | — | — | — | — | — | — | — |
6 | 6 | 1 | 6 | 1 | 1 | 9 | 12 | 8 | 2 | 18 | — | — | 3 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 6 | — | — | S 7 | — | E 8 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | 11 | — | — | 8 | — | 5 | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 76 | 103 | 41 | 41 | 77 | 76 | 81 | 101 | 10 | 19 | 36 | 19 | 19 | 123 | 19 | 123 | 27 | 59 | 19 | 27 | 17 |
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.










