Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 am 25 Jul 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.3° C
1.1° 

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 25 Jul 2026:

  • Most powerful swell: Tuesday 28 Jul, 6AM (local time) - 1.5ft (0.4m), 9s period, SSW swell with 26 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 0.4m 9s and forecast to arrive on Tuesday (Jul 28) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Jul 29) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 6AM (Tue 28th Jul)1.5ft (0.4m) 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 menu for the next couple of weeks.

To be straight with you, the first week is a bit of a write-off. We're looking at a long, quiet stretch from Saturday the 25th of July all the way through to Sunday the 2nd of August. The surf is tiny, with heights barely scraping 1 ft and the combined energy is weak, barely hitting double digits. Winds are mostly cross-onshore and the conditions are just flat out poor. You’re better off leaving the boards in the shed for this one.

Things start to show a pulse of life on Monday the 3rd of August. We've got a long-period groundswell starting to push in from the SE, with a period of 17 seconds. The combined energy jumps to a moderate 301. The swell height is still only 2 ft on Monday morning, but it's clean with light cross-shore winds. This is a real tease, though, because the wind gets messy in the afternoon.

The real standout, and the only time I'd really get excited, is shaping up for Tuesday the 6th of August. Clean, offshore winds from the NNE at 19 mph are going to be groomed the swell coming from the SE. The swell is a solid 8 ft to 10 ft with a very long 18-second period, producing strong wave energy (3851 to 5583). This is proper groundswell. For a beach/sandbar setup like Hanamizu River, that long period can make it break a bit straight, so keep your wits about you. This is expert territory at that size. The wind is clean, so you’ll be looking at some proper, lined-up walls.

The 7th of August sees a massive pulse of energy, but it’s a write-off. The swell is predicted to be too big for the break at 15 ft to 16 ft, and even with clean wind, it’s a no-go. The following days are just a messy, blown-out combination of big, shifting swell and howling onshore winds.

So, the call is clear. The first week is a dud. The second week has a window of pure, clean, powerful surf on the 6th of August. That’s the one to circle on the calendar. It’s still a week and a half away, so keep an eye on it, but as a long-range prospect, it’s a beauty.

Stay wet,
Rusty.

Short Range Forecast

Heavy rain (total 28mm), heaviest during Sun night. Warm (max 30°C on Sat morning, min 24°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Tue afternoon. Warm (max 27°C on Wed morning, min 24°C on Tue afternoon). Wind will be generally light.

Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
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
10
0.3
SE
10
0.2
SSE
15
0.1
SE
15
0.3
SE
11
0.3
SE
11
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
SSW
9
0.3
SE
10
0.3
SSW
8
0.4
SSW
8
0.3
SSW
8
0.3
SSW
7
0.3
SSW
7
0.2
SSW
8
0.2
S
8
0.2
S
7
0.4
S
3
0.1
SE
10
Wave Graph
Metric surfscale
Energy kJ
15
15
22
8
18
20
16
16
16
26
15
14
22
13
10
10
6
4
4
5
4
Wind (km/h)
5
E
10
S
5
E
5
SSW
15
SSE
15
NE
10
ENE
5
SSW
5
SSE
5
SSE
5
S
10
NE
15
NE
10
S
5
ENE
5
ESE
0
SSW
0
SSE
5
SE
15
S
5
W
Wind State
cross-on
cross-on
glassy
cross-on
cross-on
cross-off
cross-on
cross
cross-on
on
glassy
cross
cross
cross-on
glassy
cross-on
glassy
glassy
on
cross-on
cross-off
High Tide
4:24PM1.19m
00:48AM1.28m
4:44PM1.26m
1:59AM1.31m
5:07PM1.31m
2:54AM1.37m
5:29PM1.36m
3:40AM1.42m
5:51PM1.39m
4:21AM1.46m
6:13PM1.42m
5:00AM1.48m
6:35PM1.44m
Low Tide
7:57PM1.13m
8:56AM0.32m
9:09PM1.09m
9:39AM0.25m
9:52PM1.04m
10:16AM0.18m
10:26PM0.97m
10:50AM0.14m
10:59PM0.90m
11:21AM0.13m
11:31PM0.83m
11:50AM0.15m
00:04AM0.75m
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
rain showers
part cloud
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:45
4:46
4:47
4:48
4:48
4:48
4:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:51
6:50
6:49
6:49
6:47
 mm
6
3
1
3
11
2
2
5
3
1
1
3
Temp °C
30
29
25
27
27
26
26
27
25
26
26
24
27
27
26
25
25
25
26
27
25
Feels °C
35
33
30
29
29
31
29
30
28
28
31
26
29
30
30
28
29
29
29
29
29
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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