Katahama surfForecast / Shizuoka / Japan

information circle48hr Weather and Surf, issued 8 am Thursday 21 May 2026 JST
Forecast update in hr  min  s Forecast update imminent
Katahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Katahama sea temperature is
20.0° C
(Which is 1.3°C colder than average for this time of year)

How big are the waves at Katahama today?

The current surf forecast for Katahama at 4PM is: 0.5m 10s primary swell from a East-southeast direction (forecast issued at 08:00am May 21). An open ocean swell of 2.5m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (21 May)3.5ft (1.1m)7s
Afternoon (21 May)1.5ft (0.5m)10s
Evening (21 May)1.5ft (0.5m)10s

Table - waves today at Katahama. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 32mm), heaviest during Thu morning. Warm (max 22°C on Thu morning, min 14°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NE by Fri night).

Thursday
21
Friday
22
Saturday
23
Sun
24
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
Rating
(10 max)
1
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.8
ESE
10
1.1
SSE
7
0.7
ESE
10
0.5
ESE
10
0.5
ESE
10
0.5
ESE
10
0.5
ESE
10
0.7
E
10
0.4
ESE
10
1
E
5
1
E
5
1.3
E
6
0.1
SE
8
2.3
E
8
0.1
SE
8
0.1
SE
8
2
E
7
2.2
E
7
2
E
8
2.2
E
7
2
E
6
1.9
E
6
2
ESE
6
1.3
SE
7
Wave Graph
Metric surfscale
Energy kJ
103
114
81
54
55
55
55
94
36
50
58
112
3
0
3
2
0
0
0
0
321
266
291
155
Wind (km/h)
5
S
15
SW
30
SW
25
WSW
25
WSW
15
WSW
0
WNW
15
ENE
20
NE
20
NE
25
NE
25
NE
30
NE
35
NE
30
NE
25
NE
25
NE
30
NE
30
NE
25
ENE
25
ENE
30
ENE
25
ENE
25
NE
glassy
cross
cross-off
cross-off
cross-off
cross-off
glassy
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
7:08AM1.44m
9:27PM1.38m
7:59AM1.32m
10:34PM1.36m
9:10AM1.19m
11:45PM1.37m
Low Tide
2:22PM0.22m
3:01AM0.98m
3:17PM0.34m
4:32AM0.95m
4:21PM0.47m
light rain
light rain
mod rain
mod rain
cloud
rain showers
rain showers
light rain
light rain
cloud
cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:39
4:39
4:39
4:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:46
6:47
6:49
3
3
10
7
1
1
2
1
4
Temp °C
21
22
22
22
21
21
21
18
17
17
19
18
17
15
14
15
15
15
16
18
18
18
18
16
24
23
21
21
20
22
25
18
15
14
16
13
12
9
8
10
10
9
10
13
13
13
14
13
Swell 1
Height (m)
Direction
Period (s)
1
S
6
1.1
SSE
7
0.7
ESE
10
0.5
ESE
10
0.5
ESE
10
2.3
SW
8
2.1
SW
8
2
SSW
8
1.7
SSW
8
1.6
SSW
8
1.4
SSW
8
1.3
SSW
8
1.1
SW
8
0.9
SW
8
0.6
SW
8
0.5
SW
7
0.4
SSW
7
0.4
SW
7
0.3
SW
7
0.3
SW
7
0.2
SSW
7
0.2
SSW
7
0.1
SW
7
1.3
SE
7
Energy kJ
68
114
81
54
55
636
490
464
347
287
213
187
129
84
45
26
20
12
8
8
5
5
2
155
Swell 2
Height (m)
Direction
Period (s)
0.8
ESE
10
0.7
ESE
9
0.5
ESE
10
0.5
ESE
10
0.5
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.1
SE
8
0.1
SE
8
0.1
SE
8
0.1
SW
7
Energy kJ
103
78
55
55
54
36
37
36
3
3
2
2
Swell 3
Height (m)
Direction
Period (s)
Energy kJ
Wind waves
Height (m)
Direction
Period (s)
1.1
SW
6
2
SSW
7
2.4
SW
7
2.5
SW
8
2.3
SW
8
0.7
E
10
0.8
E
4
1
E
5
1
E
5
1.3
E
6
1.8
E
7
2.3
E
8
2.2
E
8
2.1
E
8
2
E
7
2.2
E
7
2
E
8
2.2
E
7
2
E
6
1.9
E
6
2
ESE
6
1.4
E
10
Energy kJ
91
352
640
844
601
94
26
50
58
112
297
593
558
510
434
496
442
440
321
266
291
363
Nearest Offshore or Glassy
Rating
(10 max)
1
3
2
3
3
4
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
4
1
1
Distance (km)
2
355
224
103
150
2
2
94
13
13
13
373
334
415
619
664
661
661
747
747
104
619
103
85
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
4
2
2
2
2
2
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
3
2
3
3
4
3
2
2
2
2
1
1
1
2
1
1
1
1
1
1
4
1
3
Header Global
Rating
(10 max)
5
5
5
5
5
5
4
5
4
4
5
7
8
7
6
5
5
6
7
7
8
8
7
6
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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