Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 am 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.9°C
1.0° 

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 27 Aug 2026:

  • Best quality surf: Thursday 3 Sep, 6AM (local time) - 3ft (0.9m), 11s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 3PM (local time) - 3.5ft (1.1m), 11s period, S swell with 279 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 9AM (local time) - 4.5ft (1.4m), 6s period with SW 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 (Aug 28) at 9AM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 0.7m and 6s. Another secondary swell of 0.3m and 9s is also forecast. 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 1.1m 11s and forecast to arrive on Wednesday (Sep 02) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Aug 29) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Fri 28th Aug)4.5ft (1.4m) 6s
Best Surf 6AM (Thu 3rd Sep)3ft (0.9m) 11s
Most Powerful 3PM (Wed 2nd Sep)3.5ft (1.1m) 11s

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 offer for Hanamizu River.

Right off the bat, it's a bit of a slow start. For the first week or so, we're looking at a whole lot of nothing special. The swell is small and weak, and the wind is mostly messing things up with a cross or cross-on direction. It's a beach and sandbar setup, so you need clean conditions to get anything decent. The first few days are not worth paddling out for.

Honestly, there's a big gap of quiet, un-rideable surf stretching from the end of August right through the first few days of September. A lot of tiny waves with cross-onshore breezes – that's a recipe for frustration.

The one, and really the only, window in this whole forecast that catches my eye is around Sunday, September 6th. We finally see some proper energy arriving. The combined swell energy jumps to a strong 862, with a clean 5ft groundswell from the south at a very long period of 14 seconds. That's the kind of power that gets a sandbar working. Wind looks acceptable, a gentle cross-off from the SSW, which should keep things fairly clean. This is the standout, the one to circle on the calendar. That long period swell will push through with some real shape, but at beach breaks it can sometimes throw a straight wall, so you'll want to pick your peak carefully. It's a spot that breaks sometimes, but when it turns on, it's worth the wait.

Through the next week it fades again. The 7th and 8th have size, pushing up to 6ft and 6ft, but the wind goes onshore more, chopping up the face. That’s more likely for the well-equipped crew, not beginners. By the 9th it drops back, and we finish the run with more small, messy days.

So, the call is clear: wait for that Sunday, September 6th. It’s the only serious offering in the long-range. For the rest, keep your board in the car but don't get your hopes up.

- Rusty

Short Range Forecast

Light rain (total 4mm), mostly falling on Fri morning. Warm (max 30°C on Fri afternoon, min 22°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 29°C on Mon afternoon, min 26°C on Mon night). Wind will be generally light.

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
6
0.9
SSW
7
0.6
SSW
7
0.4
SSW
7
0.3
SSW
8
0.3
SSW
8
0.2
SSE
10
0.2
SSE
10
0.3
SSW
8
0.2
S
12
0.3
SSW
10
0.5
S
11
0.6
SSW
10
0.7
SSW
10
0.8
SSW
10
0.9
S
10
1.1
S
11
0.7
SSW
10
0.9
SSW
11
0.7
SSW
11
0.7
SSW
11
Wave Graph
Metric surfscale
Energy kJ
122
64
42
18
12
12
10
10
11
10
21
58
77
104
139
177
279
115
206
117
121
Wind (km/h)
15
WSW
10
SW
15
NNE
10
ENE
10
E
15
NNE
10
NNE
0
NE
0
SW
5
S
20
S
10
WSW
5
SE
15
SSE
5
WSW
10
S
25
S
15
WSW
15
SW
15
SW
10
W
Wind State
cross-off
cross
cross-off
cross-on
cross-on
cross-off
cross-off
glassy
glassy
cross-on
cross-on
cross-off
on
cross-on
glassy
cross-on
cross-on
cross-off
cross
cross
cross-off
High Tide
5:27PM1.46m
4:55AM1.50m
5:46PM1.49m
5:33AM1.50m
6:05PM1.51m
6:13AM1.47m
6:25PM1.51m
6:56AM1.40m
6:47PM1.51m
7:44AM1.31m
7:09PM1.49m
8:44AM1.20m
7:34PM1.45m
Low Tide
10:54AM0.20m
11:08PM0.63m
11:22AM0.24m
11:38PM0.52m
11:50AM0.32m
00:10AM0.43m
12:17PM0.43m
00:44AM0.36m
12:44PM0.57m
1:22AM0.32m
1:10PM0.72m
2:06AM0.32m
1:35PM0.87m
light rain
part cloud
cloud
cloud
light rain
light rain
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:11
5:13
5:13
5:13
5:15
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:15
6:14
6:12
6:10
6:08
6:07
 mm
1
2
1
Temp °C
28
30
28
26
24
23
24
24
24
28
29
26
28
28
27
28
29
27
31
32
27
Feels °C
29
32
31
28
27
23
26
27
27
30
30
29
31
30
32
31
30
30
32
33
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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