Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 pm 17 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
21.2° C

2.2°C colder than average for this time of year

Katahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Katahama today (17 Jun):

  • Afternoon surf: Afternoon surf (17 Jun, local time) - 1.5ft (0.4m), 8s period with E swell.
  • Evening surf: Evening surf (17 Jun, local time) - 2.5ft (0.8m), 5s period with SSE swell.

The current surf forecast for Katahama at 9PM is: 0.8m 5s primary swell from a South-southeast direction and 0.8m 4s secondary swell from a East-northeast direction (forecast issued at 02:00pm June 17). An open ocean swell of 0.9m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (17 Jun)--
Afternoon (17 Jun)1.5ft (0.4m)8s
Evening (17 Jun)2.5ft (0.8m)5s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 18mm), heaviest on Wed night. Warm (max 25°C on Fri afternoon, min 19°C on Wed night). Wind will be generally light.

Wed
17
Thursday
18
Friday
19
Sat
20
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
6 AM
9 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
1
1
1
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
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
E
8
0.4
E
8
1.2
SSE
8
0.8
SSE
5
0.3
E
9
0.2
ESE
12
0.3
E
9
0.3
E
9
0.9
SE
6
0.9
SSE
6
0.9
SSE
6
0.9
SE
6
0.8
SSE
6
0.8
SSE
6
0.7
SSE
6
0.6
SSE
6
0.2
SSE
10
0.3
SE
10
0.4
SE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
Wave Graph
Metric surfscale
Energy kJ
23
23
207
33
14
14
14
14
51
61
74
59
51
42
31
26
10
16
25
16
25
24
24
24
Wind (km/h)
15
SE
20
SE
20
ESE
20
ENE
25
NE
20
NE
20
NE
15
NE
10
ENE
15
SW
20
SW
10
WSW
5
W
5
NNW
5
NE
5
ENE
10
SSE
10
SSW
10
SW
0
WSW
0
N
5
ENE
10
ENE
15
ENE
Wind State
on
on
on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross-off
glassy
glassy
glassy
cross-on
cross-on
cross
cross
glassy
glassy
cross
cross
cross
High Tide
7:32PM1.53m
6:19AM1.57m
8:11PM1.54m
7:06AM1.51m
8:52PM1.54m
7:58AM1.41m
Low Tide
12:42PM0.11m
00:58AM0.97m
1:20PM0.17m
1:49AM0.93m
2:02PM0.26m
2:47AM0.90m
clear
part cloud
light rain
light rain
mod rain
mod rain
light rain
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:33
4:33
4:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:01
7:01
7:01
7:02
 mm
1
2
6
7
2
Temp °C
22
21
21
20
19
19
19
22
24
24
23
22
22
21
21
23
24
25
25
24
23
22
23
24
Feels °C
22
20
20
19
17
18
18
22
25
25
23
24
25
24
24
26
26
27
27
28
27
25
25
25
Swell 1
Height (m)
Direction
Period (s)
0.4
SSW
7
0.4
SW
9
0.1
SE
10
0.9
SSW
8
1.7
SSW
8
2.1
SSW
8
1.7
SSW
8
1.4
SSW
7
1
SW
7
0.9
SW
7
1.3
SW
9
1.4
SW
9
1.2
SW
8
1.1
SW
8
1
SW
8
1
SW
8
1.2
SSW
8
0.4
SSE
6
0.4
SE
10
1.1
SW
7
1.3
SSW
8
1.4
SW
7
1.3
SW
7
1.3
SSW
7
Energy kJ
18
28
4
112
345
520
336
203
91
63
281
300
191
145
120
120
166
10
25
140
193
193
158
163
Swell 2
Height (m)
Direction
Period (s)
0.4
E
8
0.4
E
8
0.1
SE
12
0.8
SSE
5
0.3
E
9
0.3
E
8
0.3
E
9
0.3
E
9
0.9
SE
6
0.6
SW
9
0.9
SSE
6
0.9
SE
6
0.8
SSE
6
0.8
SSE
6
0.7
SSE
6
0.6
SSE
6
0.2
SSE
10
0.3
SE
10
0.3
SSE
5
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
Energy kJ
23
23
6
33
14
13
14
14
51
67
74
59
51
42
31
26
10
16
5
16
25
24
24
24
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
9
0.3
SSW
6
0.1
SE
18
0.1
SE
10
0.1
SE
10
0.2
ESE
12
0.1
SE
10
0.1
SE
10
0.3
E
8
0.2
E
8
0.3
ESE
10
0.3
ESE
10
0.3
SE
10
0.2
SSE
11
0.2
SSE
11
0.2
SSE
10
0.2
E
8
0.3
E
8
0.1
SE
14
0.3
ESE
8
0.1
E
9
0.1
SE
13
0.1
SE
13
0.1
SE
13
Energy kJ
3
8
12
4
4
14
4
4
12
5
20
21
17
11
11
10
4
12
7
14
1
7
7
7
Wind waves
Height (m)
Direction
Period (s)
0.5
SE
4
0.7
SE
4
1.2
SSE
8
0.8
ENE
4
2.4
SSW
8
0.4
ENE
3
0.7
E
10
0.9
SSE
6
1.1
SW
8
1.1
SW
8
0.1
E
9
Energy kJ
9
18
207
20
636
3
90
61
159
147
1
Nearest Offshore or Glassy
Rating
(10 max)
2
2
1
1
1
3
2
2
1
1
1
1
1
1
1
1
2
1
1
1
1
2
1
1
Distance (km)
208
208
208
208
103
13
94
13
13
6
65
2
2
2
2
13
104
65
65
2
2
13
150
150
Best forecast wave conditions in Shizuoka
Rating
(10 max)
3
2
2
1
1
1
1
1
1
1
1
1
1
1
2
2
Best forecast wave conditions in Japan
Rating
(10 max)
3
3
2
2
1
3
2
2
2
2
2
2
2
2
1
1
2
2
2
2
2
2
1
1
Header Global
Rating
(10 max)
5
8
8
4
4
4
5
5
9
9
9
7
5
5
6
5
6
6
6
5
5
8
7
7
  • 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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