Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 am 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
26.9° C
0.0° 

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 8 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 10s period, S swell with glassy winds.
  • Most powerful swell: Saturday 8 Aug, 6PM (local time) - 3ft (0.9m), 11s period, SSW swell with 198 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 3AM (local time) - 2.5ft (0.8m), 10s 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 Sunday (Aug 09) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.4m and 12s. 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 0.9m 11s and forecast to arrive on Saturday (Aug 08) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Aug 14) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 9th Aug)2.5ft (0.8m) 10s
Best Surf 3AM (Sun 9th Aug)2.5ft (0.8m) 10s
Most Powerful 6PM (Sat 8th Aug)3ft (0.9m) 11s

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


The Lowdown

Right, mate, Rusty here. Let’s be straight with you. This 16-day window for Hanamizu River is a tough one. There’s a big blank run of poor conditions right through the first week and beyond, with hardly anything worth paddling out for. The swell is tiny and the wind is usually messy, so you’re going to have to be patient. The water temp is sitting around 80°F right now, which is about average for this time of year, so no surprises there.

The first real glimmer of something surfable, but still ordinary, comes on Monday the 10th of August. Monday afternoon, the wind goes glassy, but the swell is a tiny 2ft from the SSW with a period of 11 seconds. The combined energy is only 98, so it’s weak. It’s surfable but very ordinary. Absolutely nothing to get excited about.

Wednesday the 12th of August, afternoon session shows a similar story – glassy again, but the swell is still only 2ft from the SSW. Energy is down to 71. Still just ordinary.

There’s a long gap from there with nothing but poor surf until Sunday the 16th of August. That morning, the wind is clean and cross-off from the west, with a tiny 1ft SE swell, but a period of 12 seconds. The combined energy is 108, which is moderate, but the wave height is just too small to make it worthwhile. It’s surfable but very ordinary.

Later in the window, on Saturday the 22nd of August, we see a bit of a bump. The afternoon shows a 2ft SSW swell with 11 seconds and a combined energy of 133, which is moderate. However, the wind is blowing cross-onshore at 12 mph, making it choppy. Poor surf conditions, unfortunately.

The best on offer, and I’m scraping the barrel here, is honestly the glassy windows on the 10th and 12th of August. Even then, the waves are tiny and weak. Don’t expect any standouts. This is a quiet period for Hanamizu River.

Rusty

Short Range Forecast

Light rain (total 5mm), mostly falling on Mon night. Warm (max 29°C on Sun afternoon, min 23°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 20mm), heaviest during Thu afternoon. Warm (max 28°C on Thu morning, min 24°C on Tue morning). Wind will be generally light.

Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
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
1
0
1
0
0
0
1
0
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
Wave
Height (m)
Direction
Period (s)
1.1
S
11
1
S
11
0.9
SSW
11
0.7
SSW
10
0.6
SSW
11
0.6
S
10
0.6
S
12
0.5
SSW
11
0.6
S
10
0.6
SSW
11
0.6
SSW
11
0.6
SSW
10
0.5
SSW
10
0.5
SSW
11
0.5
SSW
11
0.4
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
9
0.4
SSW
9
0.5
SSE
10
Wave Graph
Metric surfscale
Energy kJ
307
242
191
112
88
77
96
65
74
90
90
82
62
65
64
40
40
38
29
28
63
Wind (km/h)
15
SSE
20
S
10
SSW
5
ESE
10
SSE
5
SE
10
E
5
SSW
10
NE
10
SSW
15
SSW
10
WSW
15
NNE
5
E
15
N
25
N
25
NNE
25
N
30
N
30
NNE
25
N
Wind State
cross-on
cross-on
cross
cross-on
cross-on
glassy
cross-on
glassy
cross
cross
cross
cross-off
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
3:24PM1.19m
11:07PM1.33m
4:05PM1.31m
00:49AM1.35m
4:36PM1.39m
2:12AM1.41m
5:04PM1.45m
3:16AM1.49m
5:31PM1.47m
4:10AM1.55m
5:55PM1.48m
4:59AM1.57m
6:17PM1.48m
Low Tide
5:48PM1.18m
7:47AM0.25m
8:17PM1.17m
8:52AM0.13m
9:22PM1.10m
9:44AM0.04m
10:06PM0.99m
10:28AM0.00m
10:44PM0.87m
11:08AM0.03m
11:20PM0.74m
11:43AM0.11m
11:56PM0.62m
clear
clear
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part cloud
part cloud
part cloud
part cloud
thunderstorm
rain showers
part cloud
cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:56
4:56
4:58
4:58
5:00
5:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
6:37
6:36
6:35
6:34
 mm
1
4
3
2
2
1
9
3
1
4
Temp °C
28
28
26
28
29
26
27
27
26
26
27
25
27
27
25
28
28
25
27
27
25
Feels °C
31
30
29
31
30
28
29
30
28
26
28
27
29
29
26
27
28
25
26
25
24
  • Map Icons:
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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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