Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 pm 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
23.7° C
1.2° 

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 9 Jul 2026:

  • Best quality surf: Friday 10 Jul, 6AM (local time) - 5ft (1.5m), 14s period, S swell with glassy winds.
  • Most powerful swell: Saturday 11 Jul, 9AM (local time) - 7ft (2.1m), 16s period, SSW swell with 2,368 kJ wave energy.
  • Next surfable swell (1★+): Friday 10 Jul, 6AM (local time) - 5ft (1.5m), 14s 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 (Jul 10) at 6AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.9m and 18s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Hanamizu River in the next 16 days are 2.1m 16s and forecast to arrive on Saturday (Jul 11) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Fri 10th Jul)5ft (1.5m) 14s
Best Surf 6AM (Fri 10th Jul)5ft (1.5m) 14s
Most Powerful 9AM (Sat 11th Jul)7ft (2.1m) 16s

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


G’day, Rusty here, checkin’ in with a look at what’s on offer at Hanamizu River.

Right off the bat, there’s some proper swell on the way, but the winds are gonna make you work for it. The river mouth setup here is fairly exposed, and the bulk of the energy is coming from the S to SSW – that’s not quite bang-on the optimum SE direction, so the waves might not set up as well as they could.

Friday 10th July kicks things off with a chest-high 6ft swell from the S, with a long period of 15 seconds. That’s proper groundswell, meaning heaps of push, but some long lulls between sets. The combined wave energy is strong, sitting at 1410. The morning has a light SSE breeze, but it’s straight onshore, so the face is gonna be bumpy. By the arvo, the wind swings S and picks up to 12 mph, cross-onshore. It gets messy real quick.

Saturday 11th July – a touch bigger at 7ft from the SSW, period out to 16 seconds, and the energy pushes up to 2368 in the morning. That’s a lot of water moving around. But the wind is still a cross-onshore light breeze in the morning, and by afternoon it’s picking up to moderate cross-onshore again. Choppy, not clean. This swell is over 5ft, so it’s getting a bit much for beginners.

Sunday 12th July is where it gets interesting. Morning is cloudy with a light cross-shore wind from the SW at just 3 mph, swell still a solid 6ft from the SSW, period 16 seconds, energy at 1547. Then in the *afternoon*, the wind goes cross-offshore from the WSW at 6 mph, and the surf is described as “clean”. Swell drops slightly to 5ft (SSW, 16 sec, 1208 energy). That afternoon session is your standout for the whole week – the combo of groundswell energy and a clean, cross-off breeze is gonna make for some lined-up waves. The water temp anomaly is unremarkable, so it’s about average for this time of year.

From Monday 13th July onwards, the ocean switches off. Monday morning has just 3ft from the SSW, period drops to 13 seconds, and energy slumps to 287. Wind is a light cross-off, so it’s clean but tiny. Monday arvo, glassy with 3ft and 184 energy – pretty weak. Then Tuesday to Friday, swell continues to fade to knee-high and below, wind is mostly cross-onshore, and the scores tell the story: poor or ordinary conditions.

There’s a long, flat gap from Monday through to maybe Thursday 24th July. On the 24th, Friday morning, a tiny bit of life – 1ft, but the period goes back to 13 seconds (groundswell), energy only 83. Not worth paddling for.

Then on Saturday 25th July we see a pulse of 4ft from the SSW, 13-second period, energy at 411. But it’s still cross-onshore, so the conditions likely won’t let it shine. South-facing exposure on a river mouth, with that cross-onshore wind – it’s going to be choppy.

So to wrap it up: The best and pretty much only decent surf is Sunday 12th July afternoon. That 5ft SSW groundswell with a clean cross-offshore breeze is your window. After that, we’re looking at a long gap with mostly flat, onshore junk until near the end of the month. A long period swell over 5ft is often better at a reef or point, but at a beach/sandbar like Hanamizu River, it can break a bit straight – even so, that Sunday arvo is still the pick.

Keep your eyes on the sky, and remember – forecasts for anything more than a week out are just a whisper.

– Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat night. Warm (max 27°C on Sat afternoon, min 23°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sun night. Warm (max 27°C on Tue afternoon, min 24°C on Sun night). Wind will be generally light.

Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thu
16
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
2
3
0
4
3
1
4
3
3
2
2
1
1
1
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
S
15
1.8
S
15
2
S
16
2.1
SSW
16
2.1
SSW
16
2
SSW
17
1.9
SSW
16
1.7
SSW
16
1.6
SSW
16
1.1
SSW
14
0.9
SSW
13
0.8
SSW
12
0.6
SSW
12
0.6
SSW
11
0.5
SSW
11
0.4
SSW
10
0.4
SSW
10
0.9
S
4
0.7
SSW
4
0.2
SSW
9
0.9
S
4
Wave Graph
Metric surfscale
Energy kJ
1070
1371
2141
2133
2368
2215
1794
1512
1169
480
269
167
106
93
65
39
31
24
15
7
27
Wind (km/h)
10
SW
10
SSE
20
S
10
SW
10
S
20
S
10
WSW
5
SW
10
WSW
0
NNE
5
NNE
0
ENE
5
NW
5
ESE
15
S
10
SSW
10
S
25
S
10
WSW
10
S
20
S
Wind State
cross
on
cross-on
cross-off
cross-on
cross-on
cross-off
cross
cross-off
glassy
cross-off
glassy
glassy
glassy
cross-on
cross
cross-on
cross-on
cross-off
cross-on
cross-on
High Tide
11:05PM1.37m
2:23PM1.17m
00:00AM1.38m
3:42PM1.29m
1:03AM1.41m
4:37PM1.39m
2:07AM1.45m
5:21PM1.45m
3:07AM1.51m
5:59PM1.48m
4:02AM1.56m
6:34PM1.48m
4:55AM1.57m
Low Tide
6:49AM0.38m
6:20PM1.05m
7:55AM0.23m
7:58PM1.11m
8:54AM0.09m
9:12PM1.12m
9:48AM-0.02m
10:07PM1.09m
10:37AM-0.09m
10:53PM1.03m
11:23AM-0.09m
11:35PM0.95m
12:05PM-0.03m
clear
clear
clear
clear
part cloud
part cloud
rain showers
cloud
cloud
thunderstorm
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:35
4:35
4:37
4:37
4:37
4:37
4:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
6:59
6:59
6:59
6:58
6:58
6:58
 mm
2
1
Temp °C
24
26
26
24
26
27
25
25
26
25
25
25
25
26
27
25
26
26
25
28
28
Feels °C
27
27
27
26
29
28
27
28
29
29
28
29
28
29
29
28
29
26
27
30
29
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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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