Hanamizu River Surf Break

Lat Long: 35.29° N 139.26° E

Hanamizu River Surf Forecast and Surf Report

Issued: 8 am 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Hanamizu River sea temperature is
27.2°C
0.5° 

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 3 Sep 2026:

  • Best quality surf: Monday 7 Sep, 9PM (local time) - 8ft (2.5m), 8s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 3AM (local time) - 10ft (3.0m), 10s period, S swell with 1,738 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 2ft (0.6m), 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 Friday (Sep 04) at 12AM. The primary swell is predicted to be 0.6m and 11s period. 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 3.0m 10s and forecast to arrive on Tuesday (Sep 08) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Monday (Sep 07) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 4th Sep)2ft (0.6m) 11s
Best Surf 9PM (Mon 7th Sep)8ft (2.5m) 8s
Most Powerful 3AM (Tue 8th Sep)10ft (3.0m) 10s

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


The Lowdown

G’day, Rusty here. Let’s chew the fat on what’s cookin’ at Hanamizu River.

The next two weeks are mostly a quiet stretch, with a couple of short windows that’ll get your stoke up. The first couple of days are flat and ugly—not worth wettin’ a wetsuit. Thursday the 3rd is a total dud with tiny, weak swell and a cross-on breeze. Friday the 4th shows a blink of hope: Friday morning brings glassy conditions with a 2ft south swell at 10 seconds. The energy’s low at 85, but those clean, windless conditions mean you can sneak a few fun little ones. It’s a beginner-friendly spot anyway, so if you’re learnin’, that Friday morning glass-off is your best early bet.

Then we hit a real dry spell – Saturday the 5th through Monday the 7th is all heavy rain, howlin’ offshore winds, and barely a ripple. The water’s about average for this time of year at 81°F.

Now, the standout. Tuesday the 8th morning – that’s the one. Swell jumps to 8ft from the south, period 10 seconds, and the combined energy is pumpin’ at 1145. That’s solid, powerful wave energy with plenty of push. Wind is light from the WSW, so it’s clean. This is the top call of the whole outlook: Hanamizu River will have proper, surfable waves. It’s fairly consistent and fairly exposed to the southeast swell direction, though the optimum swell is from the southeast, so that south swell is a touch off-angle but still gets in. Because it’s a beach/sandbar setup and the swell is over 5ft, this is better for intermediate and above. Crowds are possible – it’s a “sometimes” spot, so you might have company. That Tuesday morning session is the one to aim for.

Wednesday the 9th morning still has size at 8ft and energy at 1428, but the wind picks up to a moderate cross-shore, kickin’ up some chop. Still surfable for experienced folks, but not as clean as Tuesday.

After that, the swell fades fast. Thursday the 10th and Friday the 11th offer small, rideable but ordinary waves – around 5ft down to 3ft – with clean conditions on the Friday morning. Nothin’ to write home about. Then from Saturday the 12th through most of the second week, it’s mostly small (2ft to 4ft), weak-energy surf, often with onshore or cross winds. A few glassy moments pop up late in the period: Thursday the 17th morning has a clean, glassy 4ft south-southwest swell with energy at 334 – decent, but the period’s only 10 seconds and the wind is light. It’s a solid “okay” session, not a standout.

Honestly, if you’re keen, make the call for Tuesday the 8th morning. That’s the real gem. The rest is a waitin’ game.

Rusty.

Short Range Forecast

Heavy rain (total 48mm), heaviest during Sat morning. Warm (max 31°C on Thu afternoon, min 21°C on Sat morning). Winds increasing (calm on Thu night, fresh winds from the N by Sat night).

Days 4-6 Weather Summary

Heavy rain (total 194mm), heaviest during Mon night. Warm (max 29°C on Tue morning, min 20°C on Sun night). Winds decreasing (fresh winds from the N on Sun morning, light winds from the SW by Tue night).

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
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
1
1
0
0
0
0
0
0
0
0
0
0
1
3
1
1
2
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
S
9
0.8
SSW
4
0.6
S
11
0.6
S
10
0.5
S
10
0.5
SSW
9
0.4
SSW
9
0.4
SSW
9
0.3
SSW
8
0.2
SSW
9
0.3
SE
7
0.4
SE
7
0.4
SE
7
0.5
SE
7
2.5
S
9
2.4
S
10
2
S
10
1.6
S
10
2.3
S
9
1.8
S
9
1.6
S
9
Wave Graph
Metric surfscale
Energy kJ
39
19
91
73
49
49
35
26
14
8
10
13
13
27
994
1131
776
500
904
551
408
Wind (km/h)
10
SSW
10
WSW
5
SSW
5
NE
5
NNE
5
NE
20
NNE
25
NNE
30
NNE
35
N
35
N
35
N
30
NNW
10
N
15
SW
10
WSW
15
SSW
10
SW
20
SSW
25
SSW
10
WSW
Wind State
cross-on
cross-off
glassy
glassy
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross
cross
cross
cross-on
cross-off
High Tide
7:34PM1.45m
10:22AM1.10m
8:03PM1.40m
8:45PM1.32m
3:36PM1.25m
10:48PM1.25m
3:45PM1.33m
1:09AM1.28m
4:04PM1.39m
2:28AM1.38m
4:25PM1.43m
Low Tide
1:35PM0.87m
3:03AM0.35m
1:53PM1.01m
4:23AM0.38m
6:11AM0.37m
7:15PM1.21m
7:42AM0.29m
8:41PM1.09m
8:43AM0.22m
9:20PM0.95m
9:30AM0.17m
9:53PM0.79m
cloud
thunderstorm
light rain
light rain
thunderstorm
heavy rain
heavy rain
cloud
part cloud
cloud
light rain
heavy rain
heavy rain
heavy rain
heavy rain
rain showers
thunderstorm
rain showers
clear
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
5:16
5:18
5:18
5:18
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:05
6:04
6:01
6:00
6:00
 mm
2
1
1
5
19
20
2
17
42
25
101
1
1
5
3
2
Temp °C
30
31
24
25
24
23
21
24
23
22
21
21
22
22
26
29
29
26
29
28
26
Feels °C
31
34
25
29
27
27
21
22
21
18
17
16
21
24
29
32
31
30
29
28
29
  • 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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