Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 pm 28 Jul 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.4° 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 28 Jul 2026:

  • Best quality surf: Wednesday 29 Jul, 6PM (local time) - 3ft (0.9m), 7s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 5 Aug, 3AM (local time) - 8ft (2.4m), 18s period, SE swell with 3,471 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 6PM (local time) - 3ft (0.9m), 7s period with SSW 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 Wednesday (Jul 29) at 6PM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.6m and 7s. Another secondary swell of 0.1m 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 2.4m 18s and forecast to arrive on Wednesday (Aug 05) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Thursday (Jul 30) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Wed 29th Jul)3ft (0.9m) 7s
Best Surf 6PM (Wed 29th Jul)3ft (0.9m) 7s
Most Powerful 3AM (Wed 5th Aug)8ft (2.4m) 18s

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


The Lowdown

Alright, grab your board and let's see what's happening. We're looking at a pretty bleak start for Hanamizu River, with a real flat spell on the cards for the first few days. The water temp is about average for this time of year, so nothing to worry about on that front.

The first week and a bit is a write-off. From Wednesday the 29th through to Monday the 3rd of August, we're looking at tiny, weak, and mostly onshore junk. The swell energy is barely a whisper, with readings like 55 and 27 (combined energy), and the period is short, around 6-7 seconds. It's all poor surf conditions, so don't even bother paddling out. This is a solid gap of nearly a week with nothing worth mentioning.

Things start to get a bit more interesting on Monday the 3rd of August. The swell energy jumps up to 347 (moderate), with a 3ft groundswell from the SE. The wind is cross-shore from the NE at 18 mph, creating some cross-chop, but it's still only marginal. The size is there, but it's not clean.

Tuesday the 4th of August sees a bigger bump. The swell pushes up to 5ft to 5ft from the SE, with a very long period of 18 seconds. The energy climbs to 1228 (strong) and then 1587 (strong). That's a lot of power in the water. The wind is a cross-shore breeze from the NE and ENE at 12 mph, so it's going to be lumpy. This is a big swell, but for a beginner spot, it's pushing the limits. The long period groundswell might make it a bit too straight at the sandbar, but the energy is there.

Now, the standout window looks like around Wednesday the 5th and Thursday the 6th of August. Wednesday morning shows a solid 10ft swell from the SE with a 2 second period, and the energy is a massive 4871 (very strong). The wind is a cross-offshore from the NNE at 19 mph, and the report says it's clean. This is the best bet for someone who knows what they're doing. The problem is, by Wednesday afternoon the swell is 12ft and the wind swings to a cross-shore, making it lumpy. Thursday the 6th of August keeps that size, with 13ft swells, but it's a cross-offshore wind in the morning with rain, so it's clean but the size is only for experts. The energy is over 9000 (very strong). This is not a beginner's game.

The real gem for the experienced surfer is Friday the 7th of August. The swell drops to a still-chunky 10ft from the S, with a 14-second period and energy of 5952 (very strong). The wind is glassy, dead calm. The report says "excellent surf conditions for experienced surfers." That's the one to circle. It's a big, powerful, clean swell at Hanamizu River, but only for the crew who can handle it.

After that, the swell drops off quickly through the weekend and into the next week, turning back into small, weak, and onshore mush. From Saturday the 8th onwards, it's back to the small stuff, with energy dropping below 1000 and eventually down to nothing.

So, to wrap it up: the first week is a total dud. The best window is from the 5th to the 7th of August, with Friday the 7th being the absolute standout for the brave and skilled. The 13ft days on the 6th are also a big call, but the wind is better on Friday. Keep an eye on that one.

Rusty.

Short Range Forecast

Light rain (total 7mm), mostly falling on Fri afternoon. Warm (max 30°C on Wed afternoon, min 25°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Fri night. Warm (max 30°C on Mon afternoon, min 24°C on Fri night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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)
0.9
SSW
5
0.7
SSW
6
0.6
SSW
7
0.5
SSW
7
0.4
SSW
7
0.5
S
7
0.4
SSW
7
0.5
S
7
0.5
S
7
0.2
SSW
7
0.2
SSW
7
0.1
SE
15
0.2
SSE
9
0.4
SE
15
0.4
ESE
14
0.5
SE
15
0.8
SE
17
0.9
SE
17
1.2
SE
18
Wave Graph
Metric surfscale
Energy kJ
44
44
41
29
18
27
17
23
22
4
4
9
8
57
81
116
346
505
871
Wind (km/h)
5
N
5
ESE
10
SSW
15
N
5
SSE
10
SSE
5
N
5
ENE
5
SSW
5
E
10
ENE
5
ESE
5
SE
5
E
10
S
5
ESE
15
NE
15
E
15
NE
Wind State
cross-off
on
cross-on
cross-off
on
on
cross-off
cross-on
glassy
glassy
cross-on
glassy
on
cross-on
cross-on
on
cross
cross-on
cross
High Tide
3:40AM1.42m
5:51PM1.39m
4:21AM1.46m
6:13PM1.42m
5:00AM1.48m
6:35PM1.44m
5:38AM1.47m
6:56PM1.46m
6:18AM1.43m
7:18PM1.46m
7:00AM1.37m
7:41PM1.46m
Low Tide
10:26PM0.97m
10:50AM0.14m
10:59PM0.90m
11:21AM0.13m
11:31PM0.83m
11:50AM0.15m
00:04AM0.75m
12:19PM0.20m
00:38AM0.68m
12:47PM0.29m
1:15AM0.61m
1:15PM0.41m
1:55AM0.55m
part cloud
clear
part cloud
thunderstorm
part cloud
clear
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:48
4:48
4:50
4:50
4:50
4:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:49
6:49
6:47
6:46
6:45
6:45
 mm
1
1
5
2
Temp °C
26
28
30
29
29
28
28
29
28
26
25
27
26
26
27
26
28
30
26
Feels °C
30
31
33
31
31
31
32
32
32
30
29
31
30
30
29
30
29
31
27
  • 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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