Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
25.9° C
0.1° 

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 19 Jul 2026:

  • Best quality surf: Monday 27 Jul, 12AM (local time) - 1ft (0.3m), 11s period, S swell with cross-offshore winds.
  • Most powerful swell: Monday 27 Jul, 6AM (local time) - 1.5ft (0.5m), 11s period, S swell with 56 kJ wave energy.
  • Next surfable swell (1★+): Monday 27 Jul, 12AM (local time) - 1ft (0.3m), 11s 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 Monday (Jul 27) at 12AM. The primary swell is predicted to be 0.3m and 11s period with a secondary swell of 0.3m and 11s. Another secondary swell of 0.8m and 4s 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 0.5m 11s and forecast to arrive on Monday (Jul 27) at 6AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 27th Jul)1ft (0.3m) 11s
Best Surf12AM (Mon 27th Jul)1ft (0.3m) 11s
Most Powerful 6AM (Mon 27th Jul)1.5ft (0.5m) 11s

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


The Lowdown

Gather 'round, grab a coffee. Rusty here. Let's have a look at what's on the table for the next couple of weeks. It's a slow start, but there's a beautiful window of proper swell coming in the last week of July that’s worth getting excited about.

Right now, and for the next week, it's a real desert out there at Hanamizu River. The surf is tiny, mostly around 0.3 ft to 0.7 ft, with weak, short-period wind swell. The combined energy is pathetic, barely climbing above 30 (13 to 31). The wind is often cross-onshore, making things choppy and messy. Honestly, it's not worth paddling out for. There's a small window on the afternoon of the 23rd with a clean, cross-off breeze, but the swell is still a measly 1 ft with a period of only 6 seconds. It's a tease. This flat spell drags on all the way through the 27th, with only a slight bump to 2 ft on the afternoon of the 26th, but it's accompanied by a 12 mph cross-onshore wind. It's a kite-surfing setup, not a paddle-surfing one.

Now, hold on to your board. The end of July is where it gets proper. The real action starts on the morning of the 28th of July. The swell jumps right up to 5 ft from the S, with a long 14-second period and moderate combined energy (1092). The wind is light and onshore, so it's a bit of a gamble.

The standout is the 29th of July. The morning delivers a clean 5 ft swell from the SSW, a 14-second period, and the wind is glassy. Combined energy is a solid 1070. The afternoon session is just as good, with the same swell size and direction, glassy conditions, and a combined energy of 988. This is the best of the best for the whole forecast. The surf will be clean, well-shaped, and a joy to ride. The waves will be powerful with that long period, making for some proper lines.

The 30th of July is still very good, with 5 ft to 6 ft SSW swell and a 14-second period, but the wind turns a little cross-onshore, taking the shine off compared to the 29th.

Then we get to the 31st of July. The morning is a real treat for experienced surfers. The swell is a solid 8 ft from the SSW with a very long 15-second period, and the wind is glassy. The combined energy is a massive 2684. This is a big, powerful groundswell that will be breaking with serious authority. It's expert territory. The afternoon, however, is a different story. The swell jumps to a monstrous 15 ft from the S, with a 16-second period. The combined energy is an enormous 11914. The break is simply too big and will be extremely dangerous. Leave that one for the chargers who know what they're doing.

The first of August is a write-off. The morning has a 7 ft SW swell but with a 22 mph cross-off wind, making it a messy, blown-out nightmare. The afternoon has a 8 ft SSW swell, but with a strong onshore wind of 12 mph. The combined energy is still high, but the conditions are unsurfable.

From the 2nd of August onwards, the swell drops right back down to 3 ft and below, with poor, weak conditions returning for the rest of the forecast. That window of goodness is short-lived but sweet.

So, to sum it up: the first week is a total write-off. Do not bother. The 29th of July is the absolute best day on offer. Then the 31st of July is a big, expert-only session in the morning. Get on it.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Wed afternoon. Warm (max 31°C on Tue morning, min 27°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 98mm), heaviest during Fri night. Warm (max 31°C on Thu afternoon, min 23°C on Fri night). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
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
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
SSE
9
0.2
SSE
8
0.5
SSW
4
0.2
SSE
8
0.2
ESE
11
0.5
SSW
4
0.3
SSW
4
0.4
SSW
3
0.4
SSW
4
0.2
SSE
10
0.4
SSW
6
0.2
SSE
10
0.2
SSE
9
0.2
SSE
9
0.3
SE
11
0.3
SE
10
0.3
SE
10
0.2
SSE
15
0.1
SE
15
0.7
S
3
0.3
S
11
Wave Graph
Metric surfscale
Energy kJ
7
7
9
6
12
10
4
5
6
15
12
12
12
11
18
15
15
22
8
11
21
Wind (km/h)
5
SE
15
S
10
W
5
SSE
10
S
10
WNW
10
SE
15
S
5
NNW
10
ENE
5
SW
5
N
10
ESE
5
SW
10
ENE
10
NE
10
N
10
NE
5
SSE
20
S
10
WSW
Wind State
on
cross-on
cross-off
on
cross-on
cross-off
on
cross-on
off
cross-on
cross-off
cross-off
on
cross
cross-on
cross
cross-off
cross
cross-on
cross-on
cross-off
High Tide
8:47PM1.39m
9:26AM1.10m
9:12PM1.37m
10:59AM1.01m
9:42PM1.35m
1:53PM1.02m
10:23PM1.31m
4:27PM1.11m
11:26PM1.28m
4:24PM1.19m
00:48AM1.28m
4:44PM1.26m
1:59AM1.31m
Low Tide
2:19PM0.59m
3:26AM0.59m
2:44PM0.76m
4:27AM0.55m
3:05PM0.90m
5:40AM0.52m
3:14PM1.02m
6:57AM0.47m
5:02PM1.11m
8:03AM0.40m
7:57PM1.13m
8:56AM0.32m
9:09PM1.09m
clear
clear
clear
clear
part cloud
clear
clear
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
light rain
thunderstorm
thunderstorm
light rain
part cloud
rain showers
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:41
4:41
4:43
4:43
4:45
4:45
4:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:54
6:53
6:53
6:52
6:52
6:52
 mm
1
2
2
11
1
30
52
1
1
Temp °C
29
30
29
31
30
29
30
29
28
30
31
27
27
26
24
25
26
25
26
26
26
Feels °C
33
34
33
36
34
33
35
33
32
34
35
32
31
30
28
27
29
28
29
28
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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