Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 pm 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.6°C
0.9° 

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 1 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 6PM (local time) - 10ft (3.0m), 12s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 9PM (local time) - 10ft (3.0m), 12s period, SSE swell with 2,587 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 1.5ft (0.5m), 11s 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 Friday (Sep 04) at 12AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.4m and 6s. 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 3.0m 12s and forecast to arrive on Tuesday (Sep 08) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Monday (Sep 07) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 4th Sep)1.5ft (0.5m) 11s
Best Surf 6PM (Tue 8th Sep)10ft (3.0m) 12s
Most Powerful 9PM (Tue 8th Sep)10ft (3.0m) 12s

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


The Lowdown

Alright, folks, Rusty here. Let’s run down what’s cooking.

The next week or so is a real mixed bag. We’ve got a long stretch of nothing worthwhile to start, but things might get exciting for the experienced crew later on.

The first real chance of a wave is at Hanamizu River on Monday morning, the 7th of September. We’re looking at a 2ft swell from the SSE with a 10-second period. The combined wave energy is only 123, so it’s weak and mushy, but you might scratch an itch. The wind is light cross-offshore, keeping things clean. It’s not going to set the world on fire.

Things crank up a notch on Monday afternoon. The swell jumps to 5ft from the S with a 13-second period (766 combined energy), and that longer period means better shaped waves, though it might get a bit sectiony at a beach/sandbar setup. Still, it’s starting to look more interesting for a stronger surfer.

The standout in this outlook is Wednesday the 9th of September. This is the real deal for experienced surfers only. We’ve got a solid 10ft swell from the SSE, with a 10 to 11-second period. The combined wave energy hits a massive 2006 to 3121 – that’s strong, powerful energy. The wind is a clean cross-off from the NNE, and the wave comment calls it “excellent surf conditions for experienced surfers.” This is the one to circle on the calendar, but only if you know what you’re doing – 10ft is big, expert-only territory.

The morning of Thursday the 10th of September looks like a write-off with strong onshore winds and the same 8ft to 6ft swell turning messy and dangerous.

Friday the 11th of September has a moment of hope. The morning session at Hanamizu River should be pure magic: glassy conditions with a 5ft SSE swell. The wind is dead calm. That’s clean lines for the dawn crew, though the swell period is 10 seconds, so it’s a bit more windswell in character. Still, a glassy 5ft is a great morning.

After that, from Saturday the 12th of September onward, the surf drops back down and the conditions get messy again with onshore winds and smaller swell until Monday the 14th. There’s a gap of a few days with nothing worth paddling out for.

Another one to keep an eye on is Tuesday the 15th of September. We get a 7ft swell from the SSE with a very long 14-second period (1584 combined energy). That’s a proper groundswell, perfect for points and reefs. It won’t be clean, though, with moderate cross-onshore wind and some risk of t-storms, so it’s a marginal, choppy day for experts only who don’t mind the mess.

So to sum it up: the first week is mostly flat or tiny. Wednesday the 9th is the big standout for experts, and Friday the 11th morning is the glassy gem for everyone else. The rest… well, you might be better off doing something else.

Stay salty,
Rusty.

Short Range Forecast

Heavy rain (total 115mm), heaviest during Fri morning. Warm (max 27°C on Wed morning, min 21°C on Fri morning). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 327mm), heaviest during Sun afternoon. Warm (max 23°C on Mon afternoon, min 17°C on Sat afternoon). Winds decreasing (fresh winds from the N on Sun afternoon, light winds from the E by Mon afternoon).

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
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
1
0
0
0
0
0
0
0
0
0
1
2
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SSW
8
0.3
SSW
8
0.4
SSW
8
0.4
SSW
9
0.5
S
9
0.5
S
9
0.5
S
11
0.6
S
10
0.6
SSW
10
0.8
SSW
9
0.6
SSW
9
0.6
S
9
0.4
SSW
8
0.4
SE
7
0.4
SE
7
0.4
SE
8
0.7
SSE
10
1.5
S
13
1.6
S
12
Wave Graph
Metric surfscale
Energy kJ
14
14
24
25
39
38
62
73
75
113
64
55
24
12
14
17
98
736
722
Wind (km/h)
5
E
5
SE
15
S
5
SW
5
S
10
SSW
10
N
25
NNE
20
NNE
15
NNE
25
NNE
30
NNE
20
N
25
N
30
N
20
NNW
15
NNE
20
NNE
30
E
Wind State
glassy
on
cross-on
glassy
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
High Tide
7:44AM1.31m
7:09PM1.49m
8:44AM1.20m
7:34PM1.45m
10:22AM1.10m
8:03PM1.40m
8:45PM1.32m
3:36PM1.25m
10:48PM1.25m
3:45PM1.33m
1:09AM1.28m
Low Tide
1:22AM0.32m
1:10PM0.72m
2:06AM0.32m
1:35PM0.87m
3:03AM0.35m
1:53PM1.01m
4:23AM0.38m
6:11AM0.37m
7:15PM1.21m
7:42AM0.29m
8:41PM1.09m
part cloud
thunderstorm
part cloud
part cloud
cloud
thunderstorm
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
mod rain
heavy rain
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
5:16
5:16
5:16
5:18
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:08
6:07
6:07
6:05
6:04
6:01
 mm
1
1
42
56
15
18
22
35
38
33
62
73
6
40
87
Temp °C
26
27
27
26
27
27
26
21
21
21
19
19
19
19
19
22
22
23
27
Feels °C
30
30
29
30
30
30
29
20
21
21
17
16
17
17
16
22
23
26
28
  • 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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