Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 pm 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.3° C
0.4° 

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 9 Aug 2026:

  • Best quality surf: Monday 10 Aug, 3AM (local time) - 1.5ft (0.5m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Monday 10 Aug, 3PM (local time) - 2ft (0.6m), 11s period, SSW swell with 93 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 3AM (local time) - 1.5ft (0.5m), 10s period with S 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 Monday (Aug 10) at 3AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.4m and 12s. 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 0.6m 11s and forecast to arrive on Monday (Aug 10) at 3PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 11) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Mon 10th Aug)1.5ft (0.5m) 10s
Best Surf 3AM (Mon 10th Aug)1.5ft (0.5m) 10s
Most Powerful 3PM (Mon 10th Aug)2ft (0.6m) 11s

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


The Lowdown

Alright, let’s get this out there. It’s Rusty.

Plain and simple, the next couple of weeks are going to be a serious test of patience around here. We’ve got a long, dry spell of tiny, weak surf ahead of us. Looking at the guidance, there’s just nothing on the table that’s going to get the heart rate up for a long while. The energy is weak, the swell is small, and most days are a write-off.

The first real glimmer of hope doesn’t show up until that Monday, the 24th of August. Even then, the morning is still pretty lifeless with a tiny 2ft SSE swell pushing a weak energy reading of 200. The afternoon sees a slight bump to 4ft from the SSE, with moderate energy at 443, but the wind is going to be cross-onshore, which will mess up any chance of it being clean. It’s a sign of life, but not a green light.

The standout, and really the only thing worth circling on the calendar, is the Tuesday morning of the 25th of August. That’s when we finally get a pulse. The swell pushes up to 4ft from the SSE with a nice long 12-second period, and the energy jumps to a solid 493. Most importantly, the conditions are forecast to be glassy. That’s the window. It’s a week and a half away, so don’t book the day off yet, but it’s the most promising thing on the whole board.

For that morning, the call is Hanamizu River. It’s a beach/sandbar break that’s fairly consistent, so it should have some shape. The swell is from the SSE, which matches what this spot wants. It’s a beginner-friendly wave at this size, so it won’t be too heavy. The glassy conditions will be the key – that’s when this place can really shine. The water temperature is about average for this time of year, so nothing unusual there. Just keep in mind, crowds are possible here, so get out early.

Before that Tuesday, you’re looking at a whole lot of nothing. The swell fades out completely, dropping to 1ft and even smaller, with weak energy readings in the 20s and 30s. The wind is messy, the waves are poor, and there’s just no reason to paddle out. It’s a barren stretch, plain and simple. A couple of mornings, like the 22nd, will be glassy, but with only 1ft on tap, it’s not even worth the effort.

So, my honest take? Give it a rest for a week and a half. Let the ocean sort itself out. Then, keep an eye on that Tuesday morning forecast for the 25th. It’s our best shot at a real surf in this entire two-week window.

Rusty.

Short Range Forecast

Heavy rain (total 23mm), heaviest during Tue night. Warm (max 28°C on Mon morning, min 22°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 21mm), heaviest during Thu afternoon. Warm (max 29°C on Thu morning, min 24°C on Wed night). Winds increasing (light winds from the N on Wed night, fresh winds from the NNE by Fri afternoon).

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
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)
0.6
SSW
11
0.5
S
11
0.6
SSW
11
0.5
SSW
10
0.5
SSW
10
0.5
SSW
11
0.5
SSW
10
0.5
SSW
10
0.5
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
9
0.4
SSW
9
0.4
SSW
9
0.4
SE
10
0.4
SE
9
0.4
SSW
11
0.4
SSW
9
Wave Graph
Metric surfscale
Energy kJ
88
62
93
58
63
64
58
58
59
39
38
38
29
28
28
27
21
38
29
Wind (km/h)
5
NE
15
NE
0
S
15
ENE
0
WNW
15
SW
5
SW
15
NE
5
S
15
NNW
25
NNE
20
NNE
20
N
20
N
30
NNE
15
N
15
N
15
NE
15
NNE
Wind State
glassy
cross
glassy
cross
glassy
cross
glassy
cross
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
High Tide
00:49AM1.35m
4:36PM1.39m
2:12AM1.41m
5:04PM1.45m
3:16AM1.49m
5:31PM1.47m
4:10AM1.55m
5:55PM1.48m
4:59AM1.57m
6:17PM1.48m
5:45AM1.54m
6:38PM1.48m
Low Tide
8:52AM0.13m
9:22PM1.10m
9:44AM0.04m
10:06PM0.99m
10:28AM0.00m
10:44PM0.87m
11:08AM0.03m
11:20PM0.74m
11:43AM0.11m
11:56PM0.62m
12:15PM0.24m
00:33AM0.52m
thunderstorm
part cloud
part cloud
part cloud
part cloud
light rain
rain showers
rain showers
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
rain showers
part cloud
rain showers
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:58
4:58
5:00
5:00
5:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:37
6:37
6:36
6:35
6:34
6:32
 mm
3
1
10
3
6
2
8
1
1
5
4
10
Temp °C
26
28
28
25
27
28
23
25
26
25
29
28
25
28
28
25
28
29
25
Feels °C
29
29
32
25
28
29
25
25
28
26
29
29
26
27
26
26
29
30
27
  • 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