Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 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, 12AM (local time) - 2ft (0.6m), 11s period, SSW swell with glassy 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, 12AM (local time) - 2ft (0.6m), 11s 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 Monday (Aug 10) at 12AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.3m and 12s. 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 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 0.5m 3s period and expected on Saturday (Aug 15) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 10th Aug)2ft (0.6m) 11s
Best Surf12AM (Mon 10th Aug)2ft (0.6m) 11s
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 folks, Rusty here. Let’s have a look at what’s shaping up. We’ve got a long stretch ahead and frankly, the first week-plus is a bit of a struggle. Hold tight though, because there’s a proper little pulse showing on the horizon for the far end of the forecast.

Right now through to the 22nd of August, it’s mostly tiny and messy. You’re looking at surfable waves but very ordinary conditions on a couple of afternoons around the 10th to 12th, with swell hanging around 2 ft to 2 ft from the SSW, but the energy is weak (only 71 to 111). Those glassy moments on Monday the 10th afternoon and Tuesday the 11th are worth a paddle if you’re desperate, but they’re not going to get the heart pumping. What’s more notable is the water temp is sitting at 81°F, which is pretty normal for this time of year.

From the 13th right through the 20th, it’s a long, dry spell of nothing worthwhile. Mostly cross-off winds, tiny swell under 2 ft, and poor surf conditions. The combined energy drops to between 25 and 81 – just a flat, sad stretch. This is a blank run of several days with no real recommendations.

Then, just when you’re about to give up, the 22nd of August – that’s a Saturday morning – shows a flicker of life. Hanamizu River (a beach/sandbar setup, fairly consistent but crowds are possible here) sees a jump in swell. We’re looking at 3 ft from the SSW, with a long period of 13 seconds and a combined energy of 321 – moderate wave energy, finally some oomph. Wind is from the NNE at 6 mph, which is cross-offshore and clean. That’s your standout for the whole run, by a long shot. The set up here, being a river mouth, should handle that longer period better than a straight beach break. The following Sunday the 23rd afternoon also looks tidy: 3 ft from the SSW, 12 seconds, cross-off breeze, clean, with energy at 279. Still good, but Saturday morning is the pick.

The rest of the 24th is marginal – clean enough but the wind turns a bit onshore, and the quality slips. So, bottom line: suffer through the next ten days, and aim for Saturday the 22nd morning at Hanamizu River for the best chance of a proper wave. It’s a long way off so don’t book the time off just yet, but it’s the only real light in this tunnel.

Rusty.

Short Range Forecast

Moderate rain (total 17mm), heaviest on Wed morning. Warm (max 29°C on Sun afternoon, min 23°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 16mm), heaviest on Thu night. Warm (max 30°C on Thu afternoon, min 24°C on Wed night). Wind will be generally light.

Sun
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
1
0
1
1
0
0
1
0
0
0
0
0
0
1
1
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)
0.7
SSW
10
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
0.5
S
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
9
0.3
SSW
9
0.4
SSE
11
0.5
SE
10
0.4
SE
10
0.4
SE
9
0.5
S
10
Wave Graph
Metric surfscale
Energy kJ
115
88
62
93
59
62
64
58
58
59
51
38
38
29
16
47
48
33
21
51
Wind (km/h)
10
SSE
5
ENE
10
ENE
5
SSE
10
ENE
0
SSW
5
WSW
10
SW
20
NNE
5
SSE
15
N
25
NNE
20
NNE
20
N
25
NNE
15
NNE
15
N
15
N
10
NNW
10
SSW
Wind State
cross-on
glassy
cross
glassy
cross
glassy
glassy
cross
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
High Tide
4:05PM1.31m
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
8:17PM1.17m
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
rain showers
thunderstorm
part cloud
part cloud
part cloud
part cloud
thunderstorm
rain showers
rain showers
rain showers
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
rain showers
part cloud
light rain
part cloud
clear
<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
1
3
4
4
5
3
1
7
1
4
Temp °C
29
26
28
28
25
26
25
24
25
26
25
29
30
26
28
25
25
25
27
26
Feels °C
32
29
31
31
25
27
28
26
27
28
26
29
30
27
27
27
26
27
31
29
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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