Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 pm 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
26.9° C
0.0° 

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 7 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 10s period, S swell with glassy winds.
  • Most powerful swell: Saturday 8 Aug, 12AM (local time) - 4.5ft (1.4m), 11s period, S swell with 485 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 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 Sunday (Aug 09) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.4m 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 1.4m 11s and forecast to arrive on Saturday (Aug 08) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Aug 14) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 9th Aug)2.5ft (0.8m) 10s
Best Surf 3AM (Sun 9th Aug)2.5ft (0.8m) 10s
Most Powerful12AM (Sat 8th Aug)4.5ft (1.4m) 11s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s cookin’ for Hanamizu River.

Honestly, mate, it’s a pretty grim stretch ahead. We’re lookin’ at a long, long dry spell with barely a ripple worth paddlin’ for. The first solid chance of anything even close to surfable doesn’t show up until Tuesday the 11th of August, and even then, it’s barely a whisper.

The water temp is sittin’ right on 80°, which is totally normal for this time of year, so no surprises there.

The one and only spot worth mentionin’ is Hanamizu River itself. It’s a beach-and-sandbar setup, exposed to the south-east swell, but it’s a beginner-friendly wave when it’s workin’. The problem is, it’s barely workin’ at all for most of this forecast.

The first real glimmer comes Tuesday morning, the 11th of August. We’ve got a tiny 2 ft swell from the SSW, with a period of 11 seconds – that’s a long-period groundswell, so the shape could be there, but it’s tiny. The wind is light and cross-offshore, which means it’ll be clean. The combined energy is a weak 77, so we’re talkin’ knee-high dribblers at best. Crowds are sometimes a problem here, but on a day like this, you’ll probably have it to yourself. It’s surfable, but just barely.

Then Wednesday the 12th of August, the afternoon session looks a touch better. The swell is still puny at 2 ft, but the wind swings offshore from the WNW at 6 mph, givin’ us clean, glassy lines. The energy is a weak 210, so again, nothin’ to write home about, but if you’re desperate, it’s the best you’ll get.

After that, it’s all downhill. From the 13th of August right through to the end of the 22nd, we’re lookin’ at swell dropping below 2 ft, weak energy, and mostly cross-onshore or onshore winds. There’s a moment on Tuesday the 18th of August, morning, where the wind goes glassy, but the swell is a pathetic 1.0 ft with only 25 energy – that’s flat.

So, the honest truth? There’s one or two small windows for a longboard or a foiler if you’re really keen, around Tuesday the 11th and Wednesday the 12th. But for a proper surf, this is a blank run. It’s just one of those stretches for the area. Forecasts can change, but for now, I’d be takin’ the dog for a walk instead.

Stay salty,
Rusty

Short Range Forecast

Mostly dry. Warm (max 29°C on Fri afternoon, min 25°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 26mm), heaviest during Tue night. Warm (max 29°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light.

Fri
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
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)
1.5
S
12
1.4
S
11
1.1
S
11
1
S
11
0.9
SSW
11
0.7
SSW
10
0.6
S
10
0.6
S
10
0.6
S
11
0.6
SSW
11
0.5
SSW
10
0.5
SSW
11
0.9
SSW
11
1.1
S
6
0.7
SSW
11
1.1
ESE
6
0.4
SSW
10
0.6
SSW
10
0.5
SSW
10
0.5
SSW
10
Wave Graph
Metric surfscale
Energy kJ
625
485
307
242
191
112
78
75
86
91
59
64
206
77
121
91
35
82
58
56
Wind (km/h)
20
S
10
S
10
SSE
15
S
5
SW
5
E
15
S
5
E
5
ENE
10
SSW
5
SE
10
WSW
15
SW
10
ENE
20
NNE
10
WNW
10
N
20
NNE
15
NE
20
N
Wind State
cross-on
cross-on
on
cross-on
cross
cross-on
cross-on
glassy
cross
cross-on
glassy
cross-off
cross
cross
cross-off
off
cross-off
cross-off
cross
cross-off
High Tide
9:50PM1.36m
3:24PM1.19m
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
Low Tide
3:24PM1.05m
6:23AM0.36m
5:48PM1.18m
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
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
part cloud
cloud
cloud
thunderstorm
thunderstorm
light rain
part cloud
cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:56
4:56
4:58
4:58
5:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:39
6:38
6:37
6:37
6:36
6:35
 mm
1
17
5
3
2
12
Temp °C
29
26
28
28
26
28
28
26
28
29
26
28
27
25
25
25
25
28
31
26
Feels °C
31
30
30
30
29
30
28
28
30
31
28
30
28
26
25
26
26
29
32
28
  • Map Icons:
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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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