Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 2 pm 25 Jul 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.2° C
0.9° 

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 25 Jul 2026:

  • Most powerful swell: Tuesday 28 Jul, 6AM (local time) - 1.5ft (0.4m), 9s period, SSW swell with 26 kJ wave energy.

Best Forecast Surf Conditions for Hanamizu River this week:

The most powerful waves expected at Hanamizu River in the next 16 days are 0.4m 9s and forecast to arrive on Tuesday (Jul 28) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 6AM (Tue 28th Jul)1.5ft (0.4m) 9s

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


The Lowdown

Alright, grab your board and let’s have a look at the forecast for Hanamizu River.

Honestly, the next week and a half is pretty flat and sad. There’s a long dry spell of nothing worth paddling out for. Starting from today, Saturday, right through until around the end of the first week of August, the swell is tiny—mostly 1 foot or less, with very weak wave energy (under 50 in the energy readings). The wind is usually cross-on or onshore, and the wave comment is “poor surf conditions” every single time. It’s a grim stretch. Some days do have glassy conditions, like Tuesday morning and afternoon, with a glassy surface and a tiny 1-foot swell from the SSW, but the energy is still weak (48 and 47) and the period is short (9 seconds). It’s not really surfable.

The first real glimmer of hope shows up on Monday, August 3rd, when the combined energy climbs to 128, but the swell is still only 2 feet and the wind is cross-shore with some chop. That’s more of a sign that things are waking up than a go-out. By Tuesday, August 4th, the swell builds to 2 feet, period stretches to 16 seconds, and energy hits 187. Still, it’s cross-shore and messy. Not quite there.

Now, the standout window is the weekend of August 9th. Saturday, August 8th, the morning brings a 4-foot SSW swell with a very long 16-second period and energy of 817. That’s a proper groundswell, and the wind is light and onshore? Actually, it’s a slight air and unknown wind state—could be glassy. The wave comment is still “marginal,” but that’s a big step up. By Sunday, August 9th, the morning swell hits 8 feet from the SSW, period 16 seconds, and the combined energy is 2664. That’s strong wave energy. The wind is light cross-shore from the ENE, which is actually pretty decent. The wave comment says “marginal” but with a score of 3/10, which is the best we get. Afternoon sees 8 feet from the S, energy 3007, with onshore wind, so the morning is your pick.

For a beginner, the 4 feet on Saturday morning is fine, but the 8 to 8 feet on Sunday is solidly in expert territory—too big for most. The long period (16 seconds) means these swells are groundswells, so they’ll hold up well at Hanamizu River, which is a beach/sandbar. Long period groundswells can break a bit straight at beach breaks, but with the size and energy, there’ll be some fun ones if you can handle the power.

Water temperature right now is 81°F, which is about 2°F warmer than the long-term average—not a big deal, just a touch on the warm side for the time of year.

So, the best on offer is the morning of Sunday, August 9th: 8-foot SSW groundswell, 16-second period, light cross-shore wind. That’s the one to circle on the calendar. Saturday morning is a smaller, more manageable option. Crowds are listed as “sometimes,” so expect a few heads out, but nothing crazy.

For the rest of the period? It’s a write-off until that August 8th-9th window. Hang tight.

Rusty.

Short Range Forecast

Heavy rain (total 27mm), heaviest during Sat afternoon. Warm (max 31°C on Sat afternoon, min 24°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Tue night. Warm (max 29°C on Fri morning, min 24°C on Tue night). Wind will be generally light.

Sat
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SE
10
0.2
SSE
15
0.1
SE
15
0.3
SE
11
0.3
SE
11
0.3
SE
10
0.3
SE
10
0.4
SSW
8
0.4
SSW
9
0.4
SSW
9
0.3
SSW
8
0.4
SSW
8
0.3
SSW
8
0.3
SSW
8
0.3
SSW
8
0.6
S
3
0.4
SSW
4
0.2
SSW
7
0.2
S
7
0.1
SE
10
Wave Graph
Metric surfscale
Energy kJ
15
22
8
18
20
16
16
23
26
25
14
22
13
11
11
7
5
5
4
4
Wind (km/h)
10
SSW
10
NE
5
SSE
15
S
10
W
15
NE
15
S
5
SE
5
SE
0
S
15
NNE
5
NE
10
SSW
0
NNE
5
SE
20
SSE
10
WSW
10
S
15
S
10
WNW
Wind State
cross-on
cross-off
on
cross-on
cross-off
cross
cross-on
glassy
glassy
glassy
cross-off
cross
cross-on
glassy
on
cross-on
cross-off
cross-on
cross-on
cross-off
High Tide
4:24PM1.19m
00:48AM1.28m
4:44PM1.26m
1:59AM1.31m
5:07PM1.31m
2:54AM1.37m
5:29PM1.36m
3:40AM1.42m
5:51PM1.39m
4:21AM1.46m
6:13PM1.42m
5:00AM1.48m
6:35PM1.44m
Low Tide
7:57PM1.13m
8:56AM0.32m
9:09PM1.09m
9:39AM0.25m
9:52PM1.04m
10:16AM0.18m
10:26PM0.97m
10:50AM0.14m
10:59PM0.90m
11:21AM0.13m
11:31PM0.83m
11:50AM0.15m
00:04AM0.75m
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
rain showers
rain showers
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:46
4:47
4:48
4:48
4:48
4:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:51
6:50
6:49
6:49
6:47
 mm
7
7
2
2
3
5
1
1
3
2
1
Temp °C
31
26
26
27
26
28
27
25
25
26
26
26
26
25
26
27
26
29
30
28
Feels °C
35
29
30
29
30
30
29
29
29
30
29
28
29
29
27
28
30
32
33
32
  • 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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