Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 am 19 Jul 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
25.8° C
0.1° 

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 18 Jul 2026:

  • Most powerful swell: Sunday 26 Jul, 12AM (local time) - 0.5ft (0.2m), 15s period, SSE swell with 22 kJ wave energy.

Best Forecast Surf Conditions for Hanamizu River this week:

The most powerful waves expected at Hanamizu River in the next 16 days are 0.2m 15s and forecast to arrive on Sunday (Jul 26) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12AM (Sun 26th Jul)0.5ft (0.2m) 15s

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


The Lowdown

Alright folks, Rusty here. We’re lookin’ at a pretty grim stretch for the Hanamizu River. Honestly, you’re gonna be sittin’ this one out for a while.

We start off on Sunday, July 19th, and it’s just no good. Tiny swell, a measly 1 foot from the southeast, with a short period of 8 seconds, and the wind is cross-on from the south at 6 mph. The water is a warm 78°, which is about average for this time of year, but that’s the only nice thing I can say. The combined energy is a weak 18, and it’s just poor. It stays flat and messy right through the week.

There’s a real gap here. From Sunday the 19th all the way through to Monday the 27th, there’s nothing worth paddlin’ out for. We’re talkin’ over a week of tiny, weak waves or just straight-up poor conditions. We get a brief moment of glass on Tuesday the 21st morning, but the swell is a pathetic 2 feet from the southwest with a period of just 4 seconds. It’s barely a ripple. The energy is still weak at 18.

The first real sign of life doesn’t show up until Tuesday, July 28th. That morning, we finally see a bump in swell. The Hanamizu River (beach/sandbar) is lookin’ at 4 feet from the south with a 14-second period. The wind is glassy, dead calm, so it’ll be clean. The combined energy jumps to a moderate 494. It’s not huge, but after a week of nothin’, that’s a welcome change. The morning is the only window though, as the afternoon turns messy with a cross-on wind.

Then Wednesday the 29th looks promising but comes with a warning. The swell builds to 6 feet from the south, with a very long 15-second period. This is proper groundswell, and it’s packin’ a strong punch with an energy of 1547. But listen, that’s a lot of power. A 6 foot swell with that period is goin’ to be a big, powerful wave. It’s not for beginners, and it’s gettin’ close to the “experts only” zone. The problem is the wind. It’s cross-on from the south at 6 mph in the morning, which is okay, but the afternoon gets a strong 15 mph cross-on, turnin’ it into a choppy mess. The long period also means it’ll be a bit straight at the beach break, but it’s a river mouth, so it might find a way to line up.

The standout, if you can call it that, is Thursday, July 30th. The swell is 7 feet from the south, with a 15-second period. That’s a big, powerful wave. The combined energy is a whoppin’ 2097 – very strong. Now, the morning has a cross wind from the northeast at 6 mph, which is a bit messy. But the real moment is the afternoon. The wind goes completely glassy, dead calm from the north-northeast, and the swell eases to a still-chunky 6 feet from the south-southeast with a 14-second period. The energy is still a strong 1162. This is the best window in the whole forecast. The conditions are clean, the swell is solid. But it’s a big wave, so only for the experienced crew. The long period means it’ll be a bit straight at the beach, but it’s worth a look.

After that, the swell drops off fast. Friday, July 31st sees it fadin’ to 3 feet with a 12-second period, and the wind is onshore again. The first week of August looks like a return to the small, weak, and onshore pattern we started with, with energy levels droppin’ back into the hundreds.

So, bottom line: There’s a long, dry spell. The best bet is squarely on Thursday, July 30th afternoon for the experienced crew. The Tuesday morning before that is a decent smaller option for the beginners if they just want clean, weak waves. Everything else is a skip.

Rusty out.

Short Range Forecast

Mostly dry. Warm (max 31°C on Tue morning, min 27°C on Sun morning). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 76mm), heaviest during Fri night. Warm (max 30°C on Wed morning, min 23°C on Fri night). Wind will be generally light.

Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
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
0
0
0
0
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)
0.3
SE
8
0.6
S
3
0.2
S
8
0.2
SSE
9
0.2
SSE
8
0.5
SSW
4
0.5
SW
4
0.2
ESE
11
0.5
SSW
4
0.3
SSW
4
0.1
SE
11
0.5
SW
4
0.2
SSE
10
0.4
SSW
6
0.2
SSE
10
0.2
SSE
9
0.2
SSE
9
0.3
SE
11
0.3
SE
10
0.3
SE
10
0.2
SSE
15
Wave Graph
Metric surfscale
Energy kJ
9
8
5
7
7
10
7
12
10
4
5
6
15
13
12
12
11
18
15
15
22
Wind (km/h)
10
S
20
S
10
W
5
SE
15
S
10
W
5
SE
15
S
10
NW
5
SSE
15
S
10
NNW
5
ESE
10
S
15
NNE
10
ENE
10
SSE
15
ENE
10
ENE
5
NE
10
NE
Wind State
cross-on
cross-on
cross-off
on
cross-on
cross-off
glassy
cross-on
off
on
cross-on
off
on
cross-on
cross-off
cross-on
cross-on
cross
cross
cross
cross
High Tide
8:23PM1.40m
8:21AM1.23m
8:47PM1.39m
9:26AM1.10m
9:12PM1.37m
10:59AM1.01m
9:42PM1.35m
1:53PM1.02m
10:23PM1.31m
4:27PM1.11m
11:26PM1.28m
4:24PM1.19m
00:48AM1.28m
Low Tide
1:50PM0.42m
2:33AM0.63m
2:19PM0.59m
3:26AM0.59m
2:44PM0.76m
4:27AM0.55m
3:05PM0.90m
5:40AM0.52m
3:14PM1.02m
6:57AM0.47m
5:02PM1.11m
8:03AM0.40m
7:57PM1.13m
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
rain showers
rain showers
part cloud
heavy rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:41
4:41
4:41
4:43
4:43
4:45
4:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:55
6:54
6:54
6:53
6:53
6:52
6:52
 mm
1
3
3
7
16
46
15
2
Temp °C
28
28
27
29
30
29
31
30
29
30
30
28
29
29
28
26
27
24
26
26
23
Feels °C
30
30
31
33
35
33
36
34
33
34
34
33
34
33
33
29
30
26
29
29
24
  • 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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