Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 am 06 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.4° C
0.6° 

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 5 Aug 2026:

  • Best quality surf: Thursday 6 Aug, 9PM (local time) - 6ft (1.9m), 14s period, S swell with glassy winds.
  • Most powerful swell: Thursday 6 Aug, 9PM (local time) - 6ft (1.9m), 14s period, S swell with 1,352 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 9PM (local time) - 6ft (1.9m), 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 Thursday (Aug 06) at 9PM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.8m and 10s. 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 1.9m 14s and forecast to arrive on Thursday (Aug 06) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 11) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Thu 6th Aug)6ft (1.9m) 14s
Best Surf 9PM (Thu 6th Aug)6ft (1.9m) 14s
Most Powerful 9PM (Thu 6th Aug)6ft (1.9m) 14s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s on the cards for the next couple weeks.

Alright, straight up, we’ve got a bit of a slow start and then a long, quiet stretch with hardly anything worth paddling out for. The only real chance to get wet comes in the first few days, and even then, it’s not firing on all cylinders.

The key spot here is Hanamizu River, a beach/sandbar setup that’s fairly consistent and beginner-friendly. It’s fairly exposed to the swell, with an optimum direction from the southeast.

Thursday morning, August 6th, we see the biggest pulse of the period: a 6 ft swell rolling in from the SSE with a solid 13-second period, giving us moderate to strong wave energy (1131). Water temp is a warm 81°, which is about average for this time of year. The wind is a cross-shore from the ENE at 9 mph, so it’s a little bumpy, but it’s the biggest size on offer. That afternoon, the wind swings southerly and the quality drops.

Friday morning, August 7th, still has some size at 5 ft from the south, with a 13-second period and moderate wave energy (962). The wind is light and onshore from the SSE at 6 mph, so it’s not clean, but it’s surfable. The afternoon goes downhill with a stronger cross-onshore wind.

Now, Saturday morning, August 8th, is probably the best call of the whole outlook. The swell has dropped to 4 ft from the south, with a 12-second period and wave energy at 516. The key here is the wind: glassy. Dead calm. A light air from the SE at 3 mph. That makes for clean, fun waves, especially for a beginner-friendly sandbar. It’s the standout session. Crowds are possible here sometimes, so get in early.

From Saturday afternoon onward, things fall apart. Sunday the 9th sees the swell drop to 2 ft, and from Monday the 10th all the way through to Thursday the 21st of August, the swell hovers between 1.0 ft and 2 ft. The wave energy stays very low, often well under 100, and wind conditions are mostly cross or onshore, with a few glassy or clean moments but just no push.

There’s a flicker on Friday the 21st of August, when the swell bumps back up to 4 ft from the south with a 12-second period and moderate energy (376), but the wind is a moderate cross-shore from the NE at 12 mph, and the conditions are still described as poor. It’s a long way out, so keep an eye on it, but don’t hold your breath.

So, bottom line: if you’re looking for a wave, your window is this Thursday morning through to Saturday morning. Saturday morning is the pick of the bunch with that glassy finish. After that, it’s a long, quiet spell with no real surf on offer until perhaps the end of the third week.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Thu morning, min 25°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 30°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light.

Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
4
2
0
1
2
0
1
0
0
1
0
0
1
0
0
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SSE
13
1.8
S
13
1.9
S
14
1.6
S
13
1.5
S
12
1.4
S
12
1.2
S
12
1.1
SSW
12
1
S
12
0.7
S
11
0.7
S
11
0.7
S
11
0.6
SSW
11
0.6
SSW
11
0.6
SSW
11
0.6
SSW
12
0.5
SSW
12
0.5
SSW
12
0.4
SSW
11
0.4
ESE
14
0.4
SW
11
Wave Graph
Metric surfscale
Energy kJ
1025
1053
1294
810
635
547
404
361
284
116
121
123
100
93
98
109
77
78
49
63
30
Wind (km/h)
15
ENE
10
S
5
NNW
10
SSE
15
S
10
S
5
SE
15
S
5
SSW
10
E
15
S
10
NNE
15
NE
10
SSE
5
SW
5
SSW
15
S
15
NNW
10
NNE
5
NE
5
NW
Wind State
cross
cross-on
glassy
on
cross-on
cross-on
glassy
cross-on
cross
cross-on
cross-on
cross-off
cross
on
glassy
cross-on
cross-on
cross-off
cross-off
glassy
off
High Tide
10:12AM1.09m
9:05PM1.40m
12:46PM1.07m
9:50PM1.36m
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
Low Tide
2:45PM0.88m
4:53AM0.43m
3:24PM1.05m
6:23AM0.36m
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
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:54
4:54
4:56
4:56
4:56
4:58
4:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:42
6:40
6:39
6:38
6:37
6:37
6:36
 mm
3
2
Temp °C
29
29
27
28
28
26
28
28
26
27
29
26
29
29
27
28
30
28
30
29
27
Feels °C
32
32
32
32
30
29
30
30
29
30
30
30
29
30
29
29
32
29
31
32
31
  • Map Icons:
  • Break
  • 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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