Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 pm 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
28.2° C
1.5° 

Hanamizu River surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Hanamizu River surf forecast from 4 Aug 2026:

  • Best quality surf: Thursday 6 Aug, 9PM (local time) - 6ft (1.9m), 14s period, S swell with glassy winds.
  • Most powerful swell: Wednesday 5 Aug, 9AM (local time) - 7ft (2.2m), 15s period, SSE swell with 2,348 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 6AM (local time) - 6ft (1.9m), 13s 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 Thursday (Aug 06) at 6AM. The primary swell is predicted to be 1.9m and 13s period with a secondary swell of 0.5m and 10s. 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 2.2m 15s and forecast to arrive on Wednesday (Aug 05) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 05) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Thu 6th Aug)6ft (1.9m) 13s
Best Surf 9PM (Thu 6th Aug)6ft (1.9m) 14s
Most Powerful 9AM (Wed 5th Aug)7ft (2.2m) 15s

Table - best surf conditions forecast for Hanamizu River over the next 16 days.


The Lowdown

Alright, Rusty here. Let's break down what’s going on at Hanamizu River for the next couple of weeks.

We've got a small window of rideable, if not perfect, waves early on, then a long, quiet stretch sets in. Water temp is about average for this time of year, nothing out of the ordinary.

The action kicks off on Wednesday, August 5th. There's a solid 7ft swell rolling in from the SSE, with a very long 15-second period – that's proper groundswell energy, and the combined energy is a hefty 2348. That’s a lot of power in the water. The morning looks best with a cross-offshore wind from the NE at 12 mph, keeping things clean. The afternoon gets a cross-on wind, so it’ll get a bit messy. Still, for a beginner-friendly beach/sandbar spot, this is the standout of the whole forecast. It’s a bit big for total newbies, but if you’ve got a little experience, Wednesday morning is the time to go. Expect some company, as crowds are possible here.

Thursday the 6th drops a notch. The swell is still a decent 6ft from the SSE, but the period is still long at 13 seconds. The winds are more cross or cross-on, so the quality isn’t as good. The energy is moderate (1111). It’s surfable, but nothing to write home about.

Friday the 7th is similar. The swell holds around 7ft from the S, with a 14-second period and strong energy (2017). The wind is light and cross-on in the morning, with a chance of rain. It’s marginal. It’s there, but it’s not going to be a classic session.

From Saturday the 8th onwards, things start to fade fast. The swell drops below 7ft and the winds get worse, turning choppy. By Sunday the 9th, the combined energy is down to 852 and it’s already being described as poor.

Then, from Monday the 10th through to the end of the forecast on the 20th of August, it’s a total flat spell. We’re talking swell heights of 3ft or less, with the combined energy dropping from 351 all the way down to 35. The winds are often strong and offshore, which would be great if there was any swell, but there isn’t. It’s a long, dry gap of about 10 days with no worthwhile surf on offer. On the 14th of August, there’s a brief moment of glassy conditions with almost no swell (2ft, energy 93), described as "surfable but very ordinary." It’s a flat calm day for a paddle, not a surf.

So, for the best bet: get out there Wednesday morning, August 5th. That’s the only real window for a proper surf. After that, the forecast is pretty bleak. For an area like this, a long blank run like that isn’t too unusual. Fingers crossed the forecasts change for the better.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Fri morning. Warm (max 30°C on Wed afternoon, min 23°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 30°C on Sun morning, min 24°C on Sun night). Winds increasing (calm on Fri night, fresh winds from the NNE by Mon morning).

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
2
3
2
2
4
3
2
4
2
1
3
1
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SE
16
2.2
SSE
15
2.2
SSE
15
2.1
SSE
14
1.8
SSE
13
1.8
S
13
1.9
S
14
2
S
14
1.9
S
14
1.7
S
14
1.6
SSW
14
1.6
SSW
14
1.5
SSW
14
1.4
SSW
14
1.2
SSW
16
1.3
SSW
15
0.8
SW
15
0.9
SSW
15
0.6
SW
15
Wave Graph
Metric surfscale
Energy kJ
2107
2348
2119
1519
1025
1087
1329
1663
1504
1195
1016
1045
769
731
688
744
276
348
136
Wind (km/h)
20
NNE
20
NE
15
E
15
NE
15
ENE
10
SSE
5
E
10
E
10
SSE
5
ESE
5
ENE
15
S
5
NE
20
NE
20
E
25
NNE
25
N
30
NNE
30
N
Wind State
cross-off
cross-off
cross-on
cross
cross
cross-on
glassy
cross-on
on
glassy
cross-on
cross-on
glassy
cross
cross-on
cross-off
cross-off
cross-off
cross-off
High Tide
8:47AM1.18m
8:33PM1.43m
10:12AM1.09m
9:05PM1.40m
12:46PM1.07m
9:50PM1.36m
3:24PM1.19m
11:07PM1.33m
4:05PM1.31m
00:49AM1.35m
4:36PM1.39m
2:12AM1.41m
Low Tide
2:41AM0.50m
2:14PM0.72m
3:38AM0.47m
2:45PM0.88m
4:53AM0.43m
3:24PM1.05m
6:23AM0.36m
5:48PM1.18m
7:47AM0.25m
8:17PM1.17m
8:52AM0.13m
9:22PM1.10m
part cloud
part cloud
clear
part cloud
clear
clear
clear
rain showers
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:54
4:54
4:54
4:56
4:56
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:43
6:42
6:40
6:39
6:38
6:37
 mm
2
3
Temp °C
24
28
30
27
29
29
27
28
29
26
28
29
26
30
30
26
27
27
25
Feels °C
23
28
31
30
32
32
32
31
31
30
31
31
30
30
29
24
24
25
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Hanamizu River:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Hanamizu River surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest