Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 am 06 Sep 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.9°C
1.3° 

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 5 Sep 2026:

  • Best quality surf: Monday 7 Sep, 6PM (local time) - 8ft (2.5m), 9s period, S swell with glassy winds.
  • Most powerful swell: Monday 7 Sep, 6PM (local time) - 8ft (2.5m), 9s period, S swell with 1,016 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 3AM (local time) - 3ft (0.9m), 9s 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 Monday (Sep 07) at 3AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.9m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Hanamizu River in the next 16 days are 2.5m 9s and forecast to arrive on Monday (Sep 07) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 06) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Mon 7th Sep)3ft (0.9m) 9s
Best Surf 6PM (Mon 7th Sep)8ft (2.5m) 9s
Most Powerful 6PM (Mon 7th Sep)8ft (2.5m) 9s

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 on the table for the next couple of weeks.

Right off the bat, I gotta be straight with you – the next few days are pretty grim. This is a slow start, and we’re looking at a real quiet spell until things finally show a pulse. From now until the 7th of September, the surf is tiny and the wind is a mess. You’re looking at knee-high slop at best, with a stiff breeze ruining any chance of a clean face. Not worth paddling out for.

The first real sign of life shows up on Monday the 7th. There’s a pulse of swell coming in, but it’s raw and messy. By Monday afternoon, we’ve got some 8ft swell from the south, but the period is short at 9 seconds, and the wind is cross-offshore. The wave energy is heavy – 1015 – but the conditions are described as “marginal.” It’s for the experienced crew only, and even then, it’s going to be a battle.

Tuesday the 8th is where it finally gets interesting. The morning brings a clean 4ft south swell with a 9-second period, and the wind is dead glassy with an ENE breeze at 0 mph. The water is a warm 82°, about a touch warmer than normal for this time of year. The wave energy is moderate at 555, and the conditions are clean. Hanamizu River is a beach/sandbar setup, so with that long period, the waves might straighten out a bit, but for a Tuesday morning with no crowds, it’s your best bet. It’s a beginner-friendly spot, and with the glassy conditions, it’ll be a fun little wave for learners.

Wednesday the 9th sees a bit more size – 6ft from the SSW – but the wind shifts to a light cross-shore, making it a little lumpy. The energy is still strong at 867, but it’s not as clean as Tuesday. For the intermediate surfer, it’s still worth a look, but the glassy Tuesday morning is the standout.

After that, the swell drops off fast. From Thursday the 10th through to the 21st of September, we’re back to tiny, weak waves. A few days in the second week have a little bump – like the 21st with 3ft and 160 energy – but it’s mostly poor conditions with onshore winds. Honestly, after the 9th, you’re better off keeping the board in the car.

So, if you’re keen, Tuesday morning the 8th is the one to circle. Glassy, clean, and a fun little wave for the beginners. The rest of the run is a write-off.

Rusty.

Short Range Forecast

Heavy rain (total 242mm), heaviest during Mon morning. Warm (max 26°C on Mon morning, min 20°C on Sun afternoon). Winds decreasing (fresh winds from the NNE on Sun afternoon, calm by Tue morning).

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Wed night. Warm (max 28°C on Wed morning, min 21°C on Wed night). Wind will be generally light.

Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
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
0
0
0
2
1
2
2
1
2
1
1
1
0
1
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)
0.2
SSE
8
0.4
SE
8
0.9
SE
8
2.3
SSE
8
2.5
S
9
1.8
S
9
1.3
S
9
1.1
S
9
0.9
SSW
10
1.8
SSW
9
1.5
SSW
9
1.3
S
9
1.1
S
9
1
S
8
0.8
S
8
0.6
S
8
0.5
S
7
0.4
S
7
0.4
S
8
0.4
S
8
0.3
SSW
10
Wave Graph
Metric surfscale
Energy kJ
7
16
98
737
994
526
276
181
135
543
344
270
185
136
80
40
27
17
20
18
20
Wind (km/h)
30
N
35
NNE
30
N
30
S
20
SW
10
SW
0
ENE
5
SE
5
SSW
10
SW
10
SW
15
N
5
ENE
5
SSE
15
NNE
15
NNE
10
NNE
10
NNE
15
NNE
5
ESE
5
NNE
Wind State
cross-off
cross-off
cross-off
cross-on
cross-off
cross
glassy
glassy
glassy
cross
cross
cross-off
glassy
on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
High Tide
3:36PM1.25m
10:48PM1.25m
3:45PM1.33m
1:09AM1.28m
4:04PM1.39m
2:28AM1.38m
4:25PM1.43m
3:26AM1.47m
4:45PM1.46m
4:15AM1.53m
5:05PM1.49m
4:59AM1.54m
5:24PM1.50m
Low Tide
7:15PM1.21m
7:42AM0.29m
8:41PM1.09m
8:43AM0.22m
9:20PM0.95m
9:30AM0.17m
9:53PM0.79m
10:09AM0.18m
10:26PM0.63m
10:43AM0.24m
10:57PM0.49m
11:14AM0.34m
11:29PM0.37m
light rain
heavy rain
heavy rain
thunderstorm
heavy rain
rain showers
light rain
light rain
rain showers
part cloud
thunderstorm
mod rain
part cloud
part cloud
cloud
cloud
part cloud
part cloud
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:18
5:18
5:18
5:20
5:20
5:20
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:04
6:01
6:00
6:00
5:58
5:57
5:54
 mm
2
44
97
77
12
5
2
1
2
2
7
Temp °C
22
21
21
26
25
26
26
26
26
28
28
22
23
24
21
21
23
23
25
26
25
Feels °C
19
18
18
26
27
30
31
32
30
32
32
22
25
27
21
22
25
25
27
29
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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