Surf Forecasts:
Hanamizu River surf forecast from 26 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 12AM (local time) - 4ft (1.2m), 12s period, S swell with glassy winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 4ft (1.2m), 12s period, SSW swell with 461 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 9PM (local time) - 2ft (0.6m), 11s period with SSW 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 26) at 9PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.9m and 5s 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 1.2m 12s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Aug 31) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 26th Aug) | 2ft (0.6m) 11s |
| Best Surf | 12AM (Wed 2nd Sep) | 4ft (1.2m) 12s |
| Most Powerful | 3AM (Wed 2nd Sep) | 4ft (1.2m) 12s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Right off the bat, I gotta be honest with you – the next week or so is looking pretty flat and disappointing. We’ve got a big gap of small, weak energy with hardly any quality on offer. The first real chance to get wet doesn’t come until the start of next week, but there’s a real standout hiding in the second week that’s worth waiting for.
The standout is Monday, September 7th, morning. That’s the one to circle on your calendar. Hanamizu River will be seeing a solid 6 ft swell from the south, with a long period of 14 seconds, giving it real groundswell grunt. The combined energy is strong at 1369, and with a light NNE cross-offshore breeze, it’s going to be clean. The water temp is 82°F, which is about normal for this time of year. This is expert territory – anything over 5 ft is already pushing it for beginners, and at 6 ft, it’s a proper session for experienced surfers only. The long period means more power and longer lulls between sets, which helps paddling, but at a river mouth, that long period can make things a little straight. Still, it’s the best on offer.
Leading up to that, we’ve got days of nothing. Wednesday the 26th through to the end of the month is mostly small, weak, and messy. The best you’ll get is a brief glassy window on Friday the 28th afternoon with a tiny 2 ft south swell, but that’s barely surfable. The combined energy is weak at 110, so it’s more of a float than a ride.
The first week of September starts slow too. Tuesday the 1st has a 1 ft glassy morning, but the energy is minimal at 80. Then Wednesday the 2nd brings a bump in size – 5 ft on the morning, 6 ft in the afternoon, with a very long period of 16 seconds and strong energy (1267 and 1332). But the SSW cross-onshore winds will chop it up, and the conditions are poor. It’s a lot of water moving with nowhere to go clean. For kite surfers, that’s probably more interesting than paddle surfing.
After the Monday standout, Tuesday the 8th still has good leftovers – 6 ft south swell, clean with NNE cross-offshore winds, and combined energy of 852. That’s a solid session for those who missed the Monday peak. Wednesday the 9th morning drops to 4 ft but stays glassy, which is a nice clean surf for the experienced crew.
Beyond that, things fade off again. The second week outlook is mostly small and weak, with no other standouts.
So, hold out for that Monday, September 7th dawn patrol. It’s the real deal.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu afternoon. Warm (max 32°C on Wed afternoon, min 24°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Sat night. Warm (max 28°C on Sun afternoon, min 23°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 12 | SSW 11 | SSW 6 | S 11 | S 10 | SSW 6 | SW 6 | SSW 5 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 5 | SSW 6 | SSW 14 | SSW 12 | S 10 | S 13 | S 12 | S 12 |
Wave Graph | ||||||||||||||||||||
137 | 68 | 36 | 55 | 45 | 61 | 54 | 16 | 20 | 12 | 12 | 11 | 31 | 103 | 36 | 30 | 98 | 202 | 295 | 453 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross-off | cross-off | glassy | glassy | cross-off | cross | glassy | cross-off | glassy | cross-on | glassy | cross | cross-off | cross-off | cross | cross-on | glassy |
High Tide | 4:51PM1.38m | 3:36AM1.42m | 5:08PM1.43m | 4:16AM1.47m | 5:27PM1.46m | 4:55AM1.50m | 5:46PM1.49m | 5:33AM1.50m | 6:05PM1.51m | 6:13AM1.47m | 6:25PM1.51m | 6:56AM1.40m | 6:47PM1.51m | |||||||
Low Tide | 10:11PM0.85m | 10:25AM0.20m | 10:39PM0.74m | 10:54AM0.20m | 11:08PM0.63m | 11:22AM0.24m | 11:38PM0.52m | 11:50AM0.32m | 00:10AM0.43m | 12:17PM0.43m | 00:44AM0.36m | 12:44PM0.57m | 1:22AM0.32m | |||||||
— | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | |
6:19 | — | — | 6:17 | — | — | 6:15 | — | — | 6:15 | — | — | 6:14 | — | — | 6:12 | — | — | 6:10 | — | |
mm | — | — | 3 | 5 | 6 | — | — | — | — | 1 | 3 | — | — | — | 1 | — | 2 | — | — | 3 |
Temp °C | 32 | 28 | 29 | 26 | 25 | 27 | 28 | 27 | 26 | 24 | 23 | 25 | 28 | 27 | 24 | 24 | 24 | 28 | 29 | 26 |
Feels °C | 35 | 31 | 34 | 26 | 26 | 31 | 32 | 31 | 28 | 28 | 25 | 28 | 32 | 31 | 26 | 27 | 26 | 30 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 11 | S 6 | S 11 | S 10 | S 6 | SSW 8 | SSW 5 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSE 10 | SSW 6 | S 6 | SSW 6 | S 10 | S 13 | S 12 | S 12 |
137 | 68 | 24 | 55 | 45 | 19 | 53 | 16 | 20 | 12 | 12 | 11 | 10 | 43 | 20 | 10 | 98 | 202 | 295 | 453 | |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 9 | SSE 9 | SE 10 | SSW 6 | S 9 | SSE 10 | S 8 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | S 8 | SSE 10 | SSW 14 | SSW 12 | SSE 10 | SSE 10 | SE 10 | SE 10 |
49 | 31 | 28 | 24 | 10 | 14 | 9 | 12 | 11 | 12 | 10 | 10 | 1 | 10 | 36 | 30 | 9 | 9 | 4 | 4 | |
Swell 3 Height (m) Direction Period (s) | E 12 | S 10 | SW 10 | SW 10 | SSE 10 | SSE 9 | SW 9 | SSE 10 | — | E 11 | SE 10 | E 11 | — | S 13 | SSE 10 | S 11 | E 12 | — | E 11 | E 10 |
3 | 19 | 25 | 15 | 9 | 8 | 3 | 9 | — | 10 | 4 | 2 | — | 13 | 10 | 20 | 3 | — | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 5 | SSW 6 | SSW 6 | — | SSW 6 | SW 6 | — | — | — | — | — | SSW 5 | SSW 6 | NE 3 | NE 2 | NE 3 | NNE 3 | — | — |
28 | 39 | 36 | 28 | — | 61 | 54 | — | — | — | — | — | 31 | 103 | 2 | 1 | 1 | 1 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 12 | 12 | 0 | 0 | 59 | 69 | 62 | 69 | 41 | 497 | 0 | 59 | 10 | 0 | 19 | 19 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











