Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 pm 25 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 25 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 9PM (local time) - 4ft (1.2m), 12s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 26 Aug, 12AM (local time) - 4ft (1.2m), 12s period, S swell with 407 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 9PM (local time) - 4ft (1.2m), 12s 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 Tuesday (Aug 25) at 9PM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.1m and 13s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Hanamizu River in the next 16 days are 1.2m 12s and forecast to arrive on Wednesday (Aug 26) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 26) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Tue 25th Aug)4ft (1.2m) 12s
Best Surf 9PM (Tue 25th Aug)4ft (1.2m) 12s
Most Powerful12AM (Wed 26th Aug)4ft (1.2m) 12s

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


The Lowdown

Alright, Rusty here again. Let’s talk about Hanamizu River in feet and miles per hour for the next couple weeks.

It’s a pretty rough outlook, no two ways about it. There’s a huge gap – nearly two weeks – before anything even comes close to being worth a paddle. The very first sign of a wave is on Tuesday, 27th August, but it’s just 1ft of SSW swell with a short period of 10 seconds, and the combined energy is a weak 122. The wind is glassy that morning, so it’ll be flat and pretty, but you’ll be bobbing around on almost nothing. Water temp is a warm 81°, which is about average for the year.

From there, it falls apart. The rest of August and the first week of September are filled with poor surf warnings. A couple of moments pop up – a 4ft on Friday morning the 28th with clean cross-off wind, and a 3ft on Sunday the 6th of September – but each one gets a “poor” or “ordinary” tag. The energy is weak, barely hitting 200 for most of them. It’s a real desert.

The one session that stands above the rest is on Tuesday morning, 8th September. We get a 4ft swell from the SSE with a period of 8 seconds and a combined energy of 208, which is moderate. The wind is a light cross-shore from the NE, keeping things mostly clean with just a little texture. For a beach-sandbar spot like Hanamizu River, that’s the best shape and push in the whole forecast. It’s your best bet by a long shot.

Other than that, it’s slim pickings. A couple of glassy mornings on tiny 2ft swells, but nothing with any power.

So, bottom line: you’ve got one real window – Tuesday morning, 8th September. Mark it down. The rest of the time, you’re better off staying dry.

Rusty.

Short Range Forecast

Moderate rain (total 17mm), heaviest on Thu morning. Warm (max 32°C on Tue afternoon, min 24°C on Thu afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Sat morning. Warm (max 29°C on Fri afternoon, min 22°C on Sun morning). Wind will be generally light.

Tue
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSE
12
1.2
S
12
0.8
SSW
12
0.7
SSW
12
1
SSW
5
0.4
SW
10
0.5
S
11
0.5
S
10
0.7
SSW
5
1.1
SSW
5
0.7
SSW
6
0.5
S
7
0.4
SSW
8
0.3
SSW
8
0.3
SSW
7
0.3
SSW
7
0.3
SSW
7
0.3
S
13
0.5
S
12
0.6
S
11
Wave Graph
Metric surfscale
Energy kJ
298
407
183
137
53
28
55
45
21
50
44
27
19
11
11
10
10
28
68
82
Wind (km/h)
20
SW
10
W
10
S
20
SW
10
WSW
15
NNE
5
WSW
10
SW
0
SSW
10
SSW
10
N
15
NNE
15
NNE
10
N
5
N
5
NNE
5
NNE
5
ENE
10
S
5
NNE
Wind State
cross
cross-off
cross-on
cross
cross-off
cross-off
cross-off
cross
glassy
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
glassy
High Tide
4:35PM1.33m
2:52AM1.35m
4:51PM1.38m
3:36AM1.42m
5:08PM1.43m
4:16AM1.47m
5:27PM1.46m
4:55AM1.50m
5:46PM1.49m
5:33AM1.50m
6:05PM1.51m
6:13AM1.47m
6:25PM1.51m
Low Tide
9:43PM0.96m
9:55AM0.23m
10:11PM0.85m
10:25AM0.20m
10:39PM0.74m
10:54AM0.20m
11:08PM0.63m
11:22AM0.24m
11:38PM0.52m
11:50AM0.32m
00:10AM0.43m
12:17PM0.43m
00:44AM0.36m
clear
rain showers
clear
clear
thunderstorm
mod rain
mod rain
light rain
part cloud
part cloud
thunderstorm
light rain
light rain
cloud
light rain
cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:09
5:11
5:11
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:20
6:19
6:17
6:15
6:15
6:14
6:12
 mm
1
1
8
6
1
3
5
2
2
Temp °C
32
28
30
32
28
25
24
25
29
29
27
23
23
23
22
23
23
26
27
26
Feels °C
34
31
33
34
31
28
27
28
32
32
30
25
24
25
24
25
25
28
29
31
  • 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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