Surf Forecasts:
Hanamizu River surf forecast from 30 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, let me get this straight. The first few days here are a bit of a write-off. We're looking at a long stretch of tiny, weak swell and poor conditions. From Thursday, July 30, right through to Monday, August 3, it's pretty much flat or close to it, with cross-onshore winds messing up what little is there. That's a solid five days of barely anything to work with.
Things start to get interesting around Tuesday, August 4, when the swell finally shows up. Out of the whole 16-day window, the real standout is the morning of Wednesday, August 5. The swell is hitting about 10 ft from the SSE with a solid 17-second period, and combined wave energy is a powerful 4342. The wind is a clean cross-offshoot from the NNE, making it look pretty inviting. You're looking at Hanamizu River here, and that's a serious groundswell for a beach/sandbar setup. It's going to be a big, powerful wave, so this is strictly for experienced surfers. It's going to be a heavy one.
The morning of Tuesday, August 4, is a decent warm-up, with about 5 ft from the SE, 16-second period, and good cross-off wind. The wave energy is strong at 2126. It's a good session, but Wednesday morning is the one to circle on the calendar. The water temp is about 81°F, which is pretty normal for this time of year.
The following days are a mixed bag, with the swell dropping out and the wind turning more onshore. The morning of Friday, August 7, has a 8 ft swell from the south, but it's getting hit by a cross-on breeze, so it won't be as clean. After that, the window closes again, and the surf goes back to small and weak for the rest of the forecast.
So, in short: sit tight for the first week, get ready for Tuesday and Wednesday, August 4 and 5, but make Wednesday morning your priority. The rest is a slow fade back to nothing.
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  | |||||||||||||||||||||
 kJ | 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 |
| kJ | 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 | — | — | — | — |
| kJ | 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 | — | — | — | — | — | — | — |
| kJ | 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 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 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.
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