Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 pm 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.0° C
0.1° 

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 8 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 6AM (local time) - 2.5ft (0.7m), 11s period, S swell with glassy winds.
  • Most powerful swell: Tuesday 11 Aug, 6PM (local time) - 3.5ft (1.1m), 10s period, SSW swell with 251 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 6AM (local time) - 2.5ft (0.7m), 11s 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 Sunday (Aug 09) at 6AM. The primary swell is predicted to be 0.7m and 11s period with a secondary swell of 0.4m and 10s. 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 1.1m 10s and forecast to arrive on Tuesday (Aug 11) at 6PM. Winds are predicted to be cross-shore 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 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sun 9th Aug)2.5ft (0.7m) 11s
Best Surf 6AM (Sun 9th Aug)2.5ft (0.7m) 11s
Most Powerful 6PM (Tue 11th Aug)3.5ft (1.1m) 10s

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 cooking for the next couple of weeks.

To be straight with you, the 16-day window is a real struggle. There’s no good surf on offer for the first nine days – from Sunday the 9th right through to the following Monday afternoon. That’s a long, flat patch. We finally get a tiny glimmer of something surfable, but it’s a hard wait.

The only spot in the game is Hanamizu River. It’s a beach and sandbar setup, and it’s fairly consistent, but the conditions are just not cooperating. The water temp is about average for this time of year, nothing wild.

The first real chance comes on Thursday the 20th, in the afternoon. We’ve got a little bump of swell pushing in from the SE, around 3ft, with a period of 8 seconds. The combined energy is weak (110), so it’s not going to have much push. The wind is light and cross-off from the NNE though, so the surface will be clean. It’s surfable, but just barely.

That’s the only real standout, and it’s a weak one. For a beginner-friendly spot like this, the small size is fine, but it’s not going to get the heart racing. For the rest of the window, it’s poor surf and ordinary conditions. If you’re desperate for a paddle, Thursday afternoon is your best (and only) bet.

Stay patient, lads. It’s a tough run.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sun night. Warm (max 29°C on Sun afternoon, min 23°C on Tue morning). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 25mm), heaviest during Fri afternoon. Warm (max 29°C on Thu morning, min 23°C on Tue night). Wind will be generally light.

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
0
0
0
0
1
1
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)
0.9
SSW
11
0.7
SSW
10
0.7
SSW
10
0.6
SSW
11
0.6
S
10
0.6
SSW
11
0.5
SSW
10
0.5
SSW
10
0.9
SSW
11
0.5
SSW
10
0.5
SSW
10
0.6
SSW
10
0.6
SSW
10
0.5
SSW
10
0.4
SSW
10
0.3
SSW
9
0.4
SSW
9
0.3
SSW
9
0.3
SSE
10
Wave Graph
Metric surfscale
Energy kJ
191
112
115
88
80
93
59
62
161
59
63
86
83
57
38
17
29
17
18
Wind (km/h)
5
SW
10
ESE
10
SSE
0
E
10
ENE
5
SW
10
ENE
15
SSW
10
SW
5
WSW
20
NNE
10
ENE
15
N
20
NNE
15
E
15
NNE
25
NNE
20
NE
20
NNE
Wind State
glassy
on
cross-on
glassy
cross-on
cross
cross
cross
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
High Tide
11:07PM1.33m
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
Low Tide
7:47AM0.25m
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
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part cloud
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thunderstorm
part cloud
thunderstorm
rain showers
light rain
cloud
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
thunderstorm
thunderstorm
part cloud
mod rain
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:56
4:58
4:58
5:00
5:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
6:37
6:36
6:35
6:34
 mm
1
1
1
1
3
2
6
1
1
4
8
4
Temp °C
26
28
29
27
27
28
25
25
26
25
26
26
25
29
29
27
29
28
25
Feels °C
30
31
32
30
29
31
24
25
28
27
27
27
26
30
31
29
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)
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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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