Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 pm 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.5° C
0.6° 

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 10 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 9AM (local time) - 1.5ft (0.5m), 10s period, SSW swell with glassy winds.
  • Most powerful swell: Tuesday 11 Aug, 6PM (local time) - 3ft (0.9m), 10s period, SSW swell with 170 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 9AM (local time) - 1.5ft (0.5m), 10s 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 Tuesday (Aug 11) at 9AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.1m and 11s. 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 0.9m 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 0.4m 3s period and expected on Tuesday (Aug 11) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 11th Aug)1.5ft (0.5m) 10s
Best Surf 9AM (Tue 11th Aug)1.5ft (0.5m) 10s
Most Powerful 6PM (Tue 11th Aug)3ft (0.9m) 10s

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


The Lowdown

Alright lads, Rusty here. Let’s get into what’s cooking at Hanamizu River for the next couple of weeks.

I’m not gonna sugarcoat it – it’s a long, quiet stretch. The first week is pretty much a write-off, and the second week isn’t much better. We’re looking at a real slow period, with a few windows of tiny, clean waves that might give you a fun little glide, but there’s nothing to get excited about.

The first real chance is Monday, the 10th of August. The afternoon has a tiny 2ft SSW swell, with an 11-second period, giving it a bit of life. The combined energy is moderate (111). The wind is glassy out of the ESE, so the surface will be like a mirror. Water temp is a warm 82°F, which is about average for this time of year. It’s surfable, but real ordinary – you’ll want a longboard, just for the feel of it.

Tuesday morning the 11th is even smaller, 2ft SSW, but still glassy. The energy drops off (67). It’s more of the same: a bit of a knee-slapper.

Then we hit a dry patch. From Tuesday afternoon all the way through to Sunday, the 25th of August, the numbers are grim. Tiny swells, 1ft to 2ft, with poor ratings. The wind is mostly cross-off or cross-on, and the energy is weak – often below 100. It’s just not doing a thing. For a spot like this, a blank run like this is pretty normal, so don’t let it get you down.

There’s a little blip on Wednesday the 12th, with a morning pulse of 4ft SE swell, but the period is a short 6 seconds, which is just wind chop. The energy is moderate (172), but the wind is cross-off, making it clean. Still, at that size with a short period, it’s not going to be a quality wave. It’s also a bit punchy for a beginner-friendly spot.

The only other tiny glimmer comes right at the end of the forecast. Monday the 25th of August, we see a bit of push. The morning is glassy with a 2ft SE swell, 10-second period, and the energy is moderate (64). The afternoon bumps up slightly to 2ft from the SSE, with a 10-second period, and energy at 94. It’s still small, but if the wind holds, you might get a few clean little runners.

So, the best of the bunch is that Monday the 10th afternoon and Tuesday the 11th morning for the glassy conditions, and the very end of the run on the 25th. But don’t go planning a trip around it. It’s a longboard-only affair for the next two weeks.

Rusty.

Short Range Forecast

Heavy rain (total 53mm), heaviest during Tue night. Warm (max 28°C on Mon afternoon, min 21°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 71mm), heaviest during Fri night. Warm (max 29°C on Fri morning, min 23°C on Fri night). Wind will be generally light.

Mon
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
PM
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
0
0
1
0
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
SSW
10
0.5
SSW
10
0.5
SSW
11
1.3
SSW
5
1.1
SE
6
0.4
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
0.3
SSW
11
0.4
SSW
11
0.4
SSW
10
0.5
S
10
0.4
SSW
10
0.4
SSW
9
Wave Graph
Metric surfscale
Energy kJ
93
59
59
64
91
77
41
39
38
31
28
28
28
28
25
40
32
52
31
29
Wind (km/h)
5
ESE
15
ENE
5
NW
10
SW
20
S
15
NNE
10
NNW
15
N
20
NNE
10
ENE
15
N
20
NNE
15
E
20
N
15
N
20
NNE
20
N
20
N
20
N
15
N
Wind State
glassy
cross
glassy
cross
cross-on
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
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
part cloud
cloud
light rain
heavy rain
light rain
light rain
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
heavy rain
thunderstorm
part cloud
cloud
part cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
4
44
4
1
2
1
6
44
14
4
4
Temp °C
28
26
27
25
23
22
25
24
28
28
26
29
29
26
27
26
24
26
27
25
Feels °C
31
26
27
27
26
22
26
25
29
30
28
30
31
28
27
27
23
24
26
25
  • 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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