Hanamizu River surfForecast / Kanagawa / Japan

information circle12 Day Weather and Surf, issued 2 pm Wednesday 17 Dec 2025 JST
Forecast update in hr  min  s Forecast update imminent
Hanamizu River surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Hanamizu River sea temperature is
18.1° C
(Which is 1.1°C colder than average for this time of year)


Best Forecast Surf Conditions for Hanamizu River this week:

The surf forecast for Hanamizu River over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Dec 20) at 9AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.1m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Hanamizu River in the next 12 days are 1.6m 7s and forecast to arrive on Sunday (Dec 21) at 6AM. Winds are predicted to be cross-offshore 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 (Dec 22) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sat 20th Dec)3.5ft (1.1m) 6s
Best Surf 3AM (Sun 21st Dec)5ft (1.6m) 7s
Most Powerful 6AM (Sun 21st Dec)5ft (1.6m) 7s

Table - best surf conditions forecast for Hanamizu River over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 16°C on Sat morning, min 8°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 15mm), heaviest on Sat afternoon. Very mild (max 18°C on Sun afternoon, min 5°C on Mon night). Winds increasing (light winds from the N on Sun night, fresh winds from the NNE by Mon afternoon).

Wed
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
1
1
1
1
0
1
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.2
SSW
0.8
SSW
0.3
SSW
0.2
SSW
0.1
E
0.1
SE
0.1
SE
0.9
SSE
1.1
S
1.3
S
1.4
S
1.5
S
1.2
S
1
S
0.7
SSE
0.5
SE
0.3
SE
0.3
SE
0.3
SE
0.3
SE
0.3
SE
Period(s) (?)466610111156667777778888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)24484255427710415322613197462610991011
Wind
(km/h)
15
SW
10
NNE
10
NE
5
E
5
NNW
10
NNE
5
SE
10
SW
15
WSW
10
WSW
15
WSW
10
SW
15
SW
5
N
25
NNE
30
NNE
30
NNE
20
NNE
30
NNE
15
N
10
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off
crossglasscross-
off
cross-
off
oncrosscross-
off
cross-
off
cross-
off
crosscrosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
4:41AM
1.31
2:38PM
1.40
5:16AM
1.36
3:16PM
1.43
5:49AM
1.38
3:52PM
1.46
6:21AM
1.39
4:28PM
1.47
6:54AM
1.39
5:05PM
1.47
7:26AM
1.38
5:42PM
1.44
7:59AM
1.38
Low Tide
/ height (m)
9:24PM
0.23
9:28AM
1.01
10:00PM
0.16
10:06AM
1.01
10:35PM
0.11
10:41AM
1.00
11:10PM
0.08
11:14AM
0.99
11:45PM
0.08
11:49AM
0.97
12:19AM
0.10
12:27PM
0.95
12:53AM
0.14
Wed
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Sunrise--6:45--6:46--6:46--6:47--6:47--6:48--6:48
Sunset4:31--4:31--4:32--4:32--4:32--4:34--4:34--
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
rain showers
rain showers
light rain
clear
part cloud
light rain
light rain
light rain
clear
clear
part cloud
part cloud
Rain (mm)
---------332--232----
Temp. °C13129111110111516161517181612107101179
Feels °C (?)97688681314151316171564-12316
  • 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 12 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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