Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 12 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
20.9° 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 (12 Jun):

  • Morning surf: Morning surf (12 Jun, local time) - 0.5ft (0.2m), 7s period with E swell.
  • Afternoon surf: Afternoon surf (12 Jun, local time) - 1.5ft (0.5m), 7s period with SSE swell.
  • Evening surf: Evening surf (12 Jun, local time) - 3ft (0.9m), 4s period with SW swell.

The current surf forecast for Katahama at 11AM is: 0.5m 7s primary swell from a South-southeast direction (forecast issued at 02:00am June 12). An open ocean swell of 0.9m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (12 Jun)0.5ft (0.2m)7s
Afternoon (12 Jun)1.5ft (0.5m)7s
Evening (12 Jun)3ft (0.9m)4s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 4mm), mostly falling on Sun night. Warm (max 24°C on Fri afternoon, min 19°C on Fri night). Wind will be generally light.

Friday
12
Saturday
13
Sunday
14
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
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
Wave
Height (m)
Direction
Period (s)
0.7
SSE
7
0.3
E
7
0.3
E
7
0.2
E
7
0.5
SSE
7
0.5
SSE
7
0.4
SSE
6
0.9
SW
4
0.7
SW
4
0.2
E
6
0.2
ESE
9
0.4
ESE
7
0.5
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
9
0.6
E
9
0.6
E
8
Wave Graph
Metric surfscale
Energy kJ
55
9
9
4
27
25
16
26
17
3
8
18
29
42
41
42
43
44
45
46
49
52
52
51
Wind (km/h)
5
NW
5
N
5
NNE
5
SSE
20
SSW
25
SW
25
SW
15
W
10
NNW
10
NNE
10
NE
10
E
10
SSE
10
SSE
5
SSE
0
NNE
5
NNE
5
NE
10
NE
10
E
10
SE
10
SSE
5
SE
10
ESE
Wind State
off
cross-off
glassy
glassy
cross
cross
cross
cross-off
off
cross-off
cross-off
cross-on
on
cross-on
cross-on
glassy
glassy
cross
cross-off
cross-on
on
on
on
on
High Tide
2:40AM1.51m
4:38PM1.37m
3:14AM1.53m
5:17PM1.42m
3:47AM1.57m
5:51PM1.46m
Low Tide
9:50AM0.30m
9:41PM1.00m
10:26AM0.22m
10:21PM1.02m
10:59AM0.15m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
light rain
<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>
7:00
7:00
7:00
 mm
1
Temp °C
20
19
19
21
23
24
23
22
21
19
19
21
22
23
22
22
21
20
20
22
22
23
22
22
Feels °C
21
19
20
22
21
21
20
21
22
19
19
21
22
23
23
25
22
21
21
22
22
24
24
23
Swell 1
Height (m)
Direction
Period (s)
1.1
SW
9
1.3
SSW
9
1.3
SSW
9
1.2
SSW
9
0.9
SSW
9
0.5
SSE
7
0.4
SSE
6
0.6
SW
8
1.1
SSW
9
0.9
SSW
9
1.1
SSW
8
1
SSW
8
0.8
SSW
8
0.7
SW
8
0.6
SW
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
9
0.6
E
9
0.6
E
8
Energy kJ
186
243
237
199
129
25
16
55
181
134
153
128
86
69
53
42
43
44
45
46
49
52
52
51
Swell 2
Height (m)
Direction
Period (s)
0.7
SSE
7
0.3
E
7
0.3
E
7
0.2
E
7
0.5
SSE
7
0.2
E
7
0.2
SSW
11
0.4
SSE
7
0.2
E
7
0.6
SW
8
0.2
ESE
9
0.4
ESE
7
0.5
E
8
0.6
E
8
0.6
E
8
0.5
SW
8
0.5
SW
8
0.5
SW
8
0.4
SSE
6
0.4
SSE
6
0.4
SSE
6
0.3
SSE
6
0.4
SSE
6
0.4
SSE
6
Energy kJ
55
9
9
4
27
4
12
15
3
44
8
18
29
42
41
31
31
29
13
13
12
7
12
12
Swell 3
Height (m)
Direction
Period (s)
0.3
E
7
0.1
E
14
0.1
E
14
0.2
E
7
0.1
E
13
0.2
E
7
0.3
SSW
11
0.1
SE
9
0.2
E
6
0.2
E
5
0.1
E
13
0.4
SSE
7
0.4
SSE
7
0.5
S
7
0.5
S
7
0.5
S
7
0.4
SSE
6
0.4
SW
8
0.4
SW
7
0.4
SW
7
0.4
SW
7
0.3
SW
7
0.3
SW
7
Energy kJ
9
4
4
4
3
4
23
3
3
2
3
15
15
22
21
22
14
20
19
14
14
8
8
Wind waves
Height (m)
Direction
Period (s)
1
SW
9
1.1
SW
8
0.9
SW
4
0.7
SW
4
0.2
ESE
3
0.2
SSE
2
0.3
SSE
3
Energy kJ
145
180
26
17
1
1
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
2
2
2
2
65
208
65
2
2
2
2
13
104
148
65
6
6
13
13
13
13
208
208
13
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
6
5
6
6
6
7
7
9
9
4
4
5
6
5
5
5
5
4
5
4
4
7
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)
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