
Surf Forecasts:
Hanamizu River surf forecast from 31 Jul 2026:
- Best quality surf: Thursday 6 Aug, 12AM (local time) - 10ft (3.0m), 16s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 3PM (local time) - 10ft (3.0m), 16s period, SSE swell with 4,320 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 2.5ft (0.7m), 6s 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 Saturday (Aug 01) at 9PM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.4m and 6s. Another secondary swell of 0.2m and 16s is also forecast. 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 3.0m 16s and forecast to arrive on Wednesday (Aug 05) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Aug 05) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 1st Aug) | 2.5ft (0.7m) 6s |
| Best Surf | 12AM (Thu 6th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 3PM (Wed 5th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
It’s a quiet start for Hanamizu River. The opening days of the outlook are bare, with no surf worth chasing until the 3rd of August. We’re talking a solid gap right at the beginning of the period. The water temperature is sitting at 81°F which is about average for this time of year, so nothing to write home about there.
The first real chance to get wet is Monday morning, the 3rd of August. We’re looking at a 3 ft swell from the SE, with a period of 16 seconds. That’s a long-period groundswell, which at a beach/sandbar setup like Hanamizu River can be a bit tricky – it might break too straight and make for a less playful wave. The wind is from the NNE at 25 km/h, cross-off, so the face will be clean. The energy is building, with a combined swell energy of 306 (moderate). It’s still a marginal call, but the clean conditions make it the best we’ve seen so far.
By Tuesday morning, the 4th of August, the swell jumps to 5 ft from the SE, period still 17 seconds. That’s getting into the territory where it might be too much for beginners. The wind is cross-off again, keeping it clean. The combined energy jumps to 1278 (strong). This is a notable step up, but still a bit of a gamble with the tide and the long period for a beach break. The afternoon gets bigger at 6 ft, but the wind swings cross-on and it gets choppy – not ideal.
The standout period for the whole run is the 5th of August. Wednesday morning delivers a 8 ft swell from the SSE, period 16 seconds, with a clean cross-off wind from the NNE at 20 km/h. The combined energy is a massive 3834 (very strong). This is big, powerful, and clean – only for experienced surfers. The wave face should be beautiful, but the size and the long period will make it a beast. This is the best on offer, no question. The afternoon bumps up to 10 ft, but the wind goes light cross-on, which might just put a wrinkle on it.
The 6th and 7th of August keep the size up, with 8 ft and 6 ft swells respectively, but the wind is mostly cross-on or onshore, messing with the quality. The energy is still strong, but the chop is a problem.
After that, the surf drops off fast. From the 8th of August onward, the swell fades below 4 ft, and the wind is a mixed bag of cross-on and cross-off, but the energy drops to weak levels. There’s a long stretch of poor conditions right through to the 15th of August – nothing to get excited about.
Then, on the 16th of August, Sunday morning, the swell makes a comeback to 6 ft from the SE, period 14 seconds, with a clean cross-off wind. The energy is back up to 1208 (strong). It’s a promising late-season pulse, but it’s far out – treat it as a hopeful look, not a sure thing.
So, for the whole 16-day window, the pick of the bunch is the 5th of August. That Wednesday morning at Hanamizu River with the 8 ft SSE swell and clean cross-off wind is the one to circle on the calendar. Just remember, it’s big, it’s powerful, and with that long period, it’s a challenge.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 30°C on Sat morning, min 22°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Wed afternoon, min 25°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 6 | SE 17 | ESE 16 | SE 15 | ESE 15 | SE 16 | SE 17 | SE 17 | SE 17 | SE 17 | SE 16 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | S 14 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||||
9 | 14 | 46 | 99 | 104 | 148 | 302 | 487 | 763 | 1267 | 1848 | 2709 | 3834 | 4320 | 3760 | 3588 | 2831 | 1984 | 1533 | 1548 | 1158 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on | glassy | on | cross-on | cross |
High Tide | 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 | 12:46PM1.07m | 9:50PM1.36m | ||||||||
Low Tide | 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 | 4:53AM0.43m | 3:24PM1.05m | ||||||||
4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | |
— | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | |
mm | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 30 | 29 | 30 | 30 | 25 | 26 | 26 | 25 | 28 | 29 | 25 | 29 | 30 | 27 | 29 | 29 | 28 | 29 | 28 | 26 |
Feels °C | 33 | 34 | 34 | 33 | 34 | 24 | 25 | 25 | 23 | 26 | 28 | 25 | 30 | 32 | 31 | 33 | 31 | 33 | 32 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SE 15 | SSW 6 | ESE 16 | SE 15 | ESE 15 | SE 16 | SE 17 | SE 17 | SE 17 | SE 17 | SE 16 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | S 14 | SSW 14 | SSW 14 | SSW 14 |
9 | 8 | 11 | 99 | 104 | 148 | 302 | 487 | 763 | 1267 | 1848 | 2709 | 3834 | 4320 | 3760 | 3588 | 2831 | 1984 | 1533 | 1548 | 1158 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 18 | SE 17 | S 5 | S 6 | SE 9 | S 8 | S 8 | E 14 | E 14 | — | — | — | — | — | — | E 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 |
4 | 12 | 46 | 5 | 7 | 3 | 1 | 1 | 15 | 4 | — | — | — | — | — | — | 52 | 4 | 10 | 75 | 90 | |
Swell 3 Height (m) Direction Period (s) | SE 15 | SE 9 | SE 9 | ESE 9 | SE 9 | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | SE 13 | SE 13 | SE 12 |
9 | 3 | 3 | 8 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 6 | |
Wind waves Height (m) Direction Period (s) | — | SSW 6 | — | — | S 6 | ENE 3 | NE 3 | NE 3 | NE 3 | NE 3 | — | — | — | — | — | — | — | — | — | — | — |
— | 14 | — | — | 18 | 3 | 3 | 3 | 5 | 7 | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 76 | 77 | 10 | 19 | 27 | 59 | 59 | 19 | 123 | 465 | 59 | 19 | 19 | 19 | 0 | 19 | 43 | 0 | 23 | 62 | 13 |
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.











