Surf Forecasts:
Hanamizu River surf forecast from 30 Jul 2026:
- Best quality surf: Thursday 6 Aug, 12AM (local time) - 11ft (3.5m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Thursday 6 Aug, 12AM (local time) - 11ft (3.5m), 16s period, SSE swell with 5,599 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 6AM (local time) - 1.5ft (0.4m), 15s 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 Sunday (Aug 02) at 6AM. The primary swell is predicted to be 0.4m and 15s period with a secondary swell of 0.3m and 5s. 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 3.5m 16s and forecast to arrive on Thursday (Aug 06) at 12AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 2nd Aug) | 1.5ft (0.4m) 15s |
| Best Surf | 12AM (Thu 6th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 12AM (Thu 6th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for Hanamizu River.
Honestly, it’s a pretty tough stretch ahead. We’ve got a long run of small, weak, and frankly poor surf conditions for the first week and a half. The first chance at anything worth paddling out for doesn’t show up until the middle of the second week, so there’s a big gap of nearly two weeks with no real recommendations.
The best of the whole forecast window lands on Wednesday, August 12th, early morning. The swell is coming up to 3ft from the SSE, with a long period of 15 seconds—that’s proper groundswell energy. The combined energy is moderate at 545. The wind is glassy, ENE at 3 mph, which means the surface will be clean as a whistle. This is a river mouth setup, so that long period energy should wrap in nicely. The water’s sitting at 81°, which is about normal for this time of year. The swell is small enough for beginners, but the long period and clean conditions will make it a fun little session for anyone. Keep in mind it can get crowded here sometimes.
Before that, Monday August 3rd afternoon has a pulse of 3ft SE swell with a very long 17 second period, and clean cross-offshore wind from the NNE at 12 mph. The combined energy is strong at 603. It’s marked as marginal, but that clean wind and long period might give a few workable ones for the patient surfer.
The rest of the window is mostly tiny, weak, or blown out. The early August period sees a big spike in swell—10ft from the SSE on August 5th and 6th—but with cross-on or onshore wind and a beach/sandbar setup, it’s going to be a messy, choppy mess. That’s more kite-surfing territory than paddle surfing. The swell is too big for beginners and the wind is poor. Late in the second week, from August 12th onward, the swell drops back down to tiny, weak levels with poor wind, so that Wednesday morning is your one real window.
Stay patient, and keep an eye on the forecasts.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Fri night. Warm (max 30°C on Fri morning, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Tue afternoon, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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) | S 6 | S 6 | SSW 6 | SSW 7 | SSW 6 | SE 17 | ESE 16 | SE 15 | SE 15 | SE 16 | SE 17 | SE 18 | SE 17 | SE 17 | SE 17 | SSE 17 | SSE 16 | SSE 16 | S 16 | S 16 | S 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 20 | 21 | 13 | 9 | 14 | 46 | 99 | 104 | 109 | 322 | 594 | 1042 | 1858 | 2499 | 3220 | 4826 | 5195 | 5599 | 5250 | 4013 | 2167 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | glassy | glassy | cross-on | cross | cross-on | cross-on | cross | cross | cross-off | cross | cross | cross-on | cross-off | cross | cross-on | glassy | on | cross-on | glassy |
High Tide | 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 | 10:12AM1.09m | 9:05PM1.40m | ||||||||
Low Tide | 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 | 3:38AM0.47m | 2:45PM0.88m | ||||||||
 | |  |  |  |  | | |  | |  | | | | | | | | | | | |
 | 4:50 | — | — | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — |
 | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — |
mm | — | — | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 29 | 28 | 29 | 29 | 28 | 30 | 30 | 27 | 26 | 27 | 25 | 29 | 30 | 26 | 28 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 33 | 32 | 32 | 32 | 31 | 34 | 34 | 33 | 29 | 26 | 28 | 25 | 29 | 30 | 28 | 30 | 32 | 32 | 33 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | S 6 | SE 9 | SSW 6 | SSW 7 | SE 15 | SSW 6 | ESE 16 | SE 15 | SE 15 | SE 16 | SE 17 | SE 18 | SE 17 | SE 17 | SE 17 | SSE 17 | SSE 16 | SSE 16 | S 16 | S 16 | S 14 |
| kJ | 20 | 3 | 13 | 9 | 8 | 7 | 99 | 104 | 109 | 322 | 594 | 1042 | 1858 | 2499 | 3220 | 4826 | 5195 | 5599 | 5250 | 4013 | 2167 |
Swell 2 Height (m) Direction Period (s) | SE 9 | S 8 | SE 10 | SE 10 | SE 18 | SE 17 | SSW 5 | SE 9 | SE 9 | S 8 | SE 9 | E 14 | — | — | — | — | — | — | — | — | ESE 10 |
| kJ | 3 | 1 | 4 | 4 | 12 | 46 | 3 | 3 | 3 | 1 | 3 | 4 | — | — | — | — | — | — | — | — | 35 |
Swell 3 Height (m) Direction Period (s) | SE 12 | S 11 | S 8 | SE 15 | SE 9 | SSE 9 | SE 9 | SE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 6 | 3 | 1 | 9 | 3 | 8 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 6 | — | — | SSW 6 | — | — | S 5 | E 3 | NE 3 | ESE 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 21 | — | — | 14 | — | — | 4 | 1 | 2 | 6 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 43 | 76 | 80 | 77 | 10 | 19 | 36 | 19 | 19 | 19 | 19 | 19 | 33 | 0 | 10 | 31 | 17 | 27 | 62 | 0 |
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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