Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 am 10 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, 3PM (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, 3PM (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 3PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.2m 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 0.7m 4s period and expected on Monday (Aug 17) at 6AM.

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

Hey, Rusty here. Let’s have a look at what’s coming down the line for the next couple weeks. It’s a quiet patch, so don’t get your hopes up too high.

The only break in the mix is Hanamizu River (a beach/sandbar setup). It’s fairly consistent for the area, but the surf quality is pretty lackluster for most of the period. The forecast starts with small, weak swell and very ordinary conditions. From Monday 10 August through Wednesday 12 August, there’s the most consistent but still tiny surf – waves around 2 ft from the SSW with a long 11-second period. That long period can make the waves break a bit straight on a beach/sandbar, but it’ll hold some shape. The best windows are Monday afternoon (10 August) with glassy conditions and a 2 ft SSW swell, and Tuesday morning (11 August) with glassy winds again. These are the cleanest moments, but the waves are small. The combined swell energy is weak, ranging from 67 to 111 – not much power behind it.

Water temp is 81° with a +0.7° anomaly, so pretty normal for the time of year – nothing unusual.

From Thursday 13 August through Monday 24 August, it’s a long dry spell with hardly anything worth paddling for. Wave heights drop to 1 ft–1 ft, combined energy falls into the low double digits (as low as 17), and the wind is often cross-off or cross-on, making it messy. Conditions are labeled “poor surf conditions” throughout. Crowds are listed as “sometimes,” so you’ll probably have the place to yourself, but it’s barely rideable.

The only other moment of interest is Tuesday 25 August. The morning brings a 1 ft SSE swell with a very long 13-second period and glassy wind – clean but tiny. Then the afternoon shows a jump: 3 ft from the SSE with a 12-second period and combined energy hitting 206 (moderate energy). That’s the biggest pulse of the whole forecast. The catch is the wind turns cross-onshore, so it won’t be clean. Still, it’s the one standout in an otherwise flat run – worth a look if you’re keen, but don’t expect perfection.

So, bottom line: the first few days (10–12 August) have the best windows for clean but tiny waves. The rest is a near-blank run until the 25th, which offers a small bump in size but messy wind. For a beach/sandbar in this area, this kind of quiet stretch is pretty normal. Forecasts can change, so keep an eye on it, but for now, it’s a waiting game.

Rusty.

Short Range Forecast

Heavy rain (total 34mm), heaviest during Tue night. Warm (max 29°C on Mon morning, min 23°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 32mm), heaviest during Sat night. Warm (max 30°C on Fri afternoon, min 22°C on Sat night). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
AM
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
1
0
1
1
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)
0.5
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
0.4
SSW
9
0.4
SSW
9
0.3
SSW
9
0.4
SSW
11
0.4
SSW
11
0.5
S
12
0.5
SSW
10
0.5
SSW
10
0.4
SE
11
Wave Graph
Metric surfscale
Energy kJ
62
93
58
63
64
58
58
59
51
38
38
33
28
28
16
40
38
70
62
55
29
Wind (km/h)
15
NE
5
SSW
15
NE
5
WNW
10
WSW
20
S
5
NNE
5
NW
15
NNW
25
NNE
20
NNE
15
N
15
NNE
10
E
20
N
25
NNE
25
NNE
25
N
25
NNE
15
N
5
WSW
Wind State
cross
glassy
cross
glassy
cross-off
cross-on
glassy
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
High Tide
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
6:30AM1.47m
6:58PM1.47m
Low Tide
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
12:43PM0.39m
1:10AM0.46m
part cloud
thunderstorm
part cloud
part cloud
light rain
heavy rain
light rain
cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
heavy rain
part cloud
cloud
mod rain
<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
5:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:36
6:35
6:34
6:32
6:30
 mm
1
4
26
3
3
1
3
6
4
3
12
10
Temp °C
29
28
26
27
26
24
24
25
25
28
28
26
29
30
27
27
26
24
27
26
24
Feels °C
31
32
26
27
28
26
26
26
25
28
28
28
30
33
29
27
26
23
24
26
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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