Katahama surfForecast / Shizuoka / Japan

information circle48hr Weather and Surf, issued 2 am Monday 18 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
19.4° C
(Which is 1.6°C colder than average for this time of year)

How big are the waves at Katahama today?

The current surf forecast for Katahama at 7AM is: 0.9m 9s primary swell from a East-southeast direction and 0.1m 7s secondary swell from a Southeast direction (forecast issued at 02:00am May 18). The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (18 May)3ft (0.9m)8s
Afternoon (18 May)3ft (0.9m)8s
Evening (18 May)2.5ft (0.7m)9s

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 23mm), heaviest during Wed afternoon. Warm (max 23°C on Tue morning, min 18°C on Wed afternoon). Wind will be generally light.

Monday
18
Tuesday
19
Wednesday
20
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
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
9
0.7
ESE
9
0.8
ESE
9
0.7
ESE
8
0.7
ESE
9
0.5
SE
11
0.6
SE
11
0.6
SE
11
0.6
SE
11
0.6
SE
10
0.6
SE
11
0.7
SE
10
0.8
ESE
10
0.8
ESE
10
0.9
SE
10
0.8
ESE
10
0.8
ESE
10
0.8
ESE
10
Wave Graph
Metric surfscale
Energy kJ
106
137
131
103
103
103
108
80
86
72
80
55
73
73
72
69
92
98
130
127
142
125
122
120
Wind (km/h)
5
NNW
5
N
0
N
5
SE
15
S
15
S
10
SW
10
WSW
5
WNW
5
W
5
WNW
10
SW
20
SSW
20
SW
20
SW
15
WSW
10
WSW
10
W
5
W
5
WSW
5
NNW
15
NNE
15
NE
15
NE
glassy
glassy
glassy
on
cross-on
cross-on
cross
cross-off
glassy
glassy
glassy
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
cross
cross
High Tide
5:14AM1.60m
6:59PM1.44m
5:47AM1.59m
7:42PM1.43m
6:25AM1.53m
8:30PM1.40m
Low Tide
11:35PM0.87m
12:14PM0.05m
00:11AM0.90m
12:51PM0.07m
00:54AM0.93m
1:34PM0.12m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
cloud
light rain
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:41
4:41
4:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:45
6:45
4
5
3
3
Temp °C
21
20
19
22
22
22
22
21
20
19
19
21
23
22
21
20
20
19
20
20
19
18
18
18
21
20
19
22
19
20
21
21
20
19
19
20
21
20
20
20
21
20
21
21
21
17
17
18
Swell 1
Height (m)
Direction
Period (s)
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
9
0.7
ESE
9
0.8
ESE
9
0.7
ESE
8
0.7
ESE
9
0.5
E
8
0.6
E
9
0.6
E
9
0.6
SE
11
0.6
SE
10
0.6
SE
11
0.7
SE
10
0.8
ESE
10
0.8
ESE
10
0.9
SE
10
0.8
ESE
10
0.8
ESE
10
0.8
ESE
10
Energy kJ
106
137
131
103
103
103
108
80
86
72
80
37
60
63
72
69
92
98
130
127
142
125
122
120
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
12
0.1
SE
12
0.1
SE
7
0.1
SE
7
0.2
SSE
8
0.2
SSE
7
0.2
SSE
7
0.3
SSE
7
0.3
SE
10
0.3
SE
10
0.4
SE
10
0.5
SE
11
0.6
SE
11
0.6
SE
11
0.5
E
9
0.5
E
9
0.5
E
10
0.5
E
10
0.2
S
3
0.1
S
7
0.1
S
7
0.2
S
7
0.4
S
7
0.4
SSW
7
Energy kJ
6
6
2
2
6
5
5
10
17
17
38
55
73
73
41
42
48
54
1
1
1
4
14
15
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
8
0.1
SE
7
0.1
SE
12
0.3
SE
11
0.3
SE
10
0.3
ESE
10
0.1
S
7
0.1
S
8
0.1
S
8
0.1
SW
8
Energy kJ
2
2
5
19
16
20
1
1
1
3
Wind waves
Height (m)
Direction
Period (s)
0.4
SW
3
0.5
SW
3
0.4
SSW
3
0.4
SW
3
0.4
SW
3
0.3
SW
3
0.3
SSW
3
0.3
SSW
7
0.3
SSW
6
0.4
S
6
Energy kJ
2
4
4
2
2
2
2
9
8
13
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
Distance (km)
6
6
6
13
208
65
6
6
6
6
6
6
382
382
236
2
6
2
2
6
2
13
13
13
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
1
2
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
Header Global
Rating
(10 max)
8
6
4
4
5
7
5
4
5
4
4
4
4
4
4
4
4
4
4
4
5
4
4
5
  • 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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