Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 pm 10 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
21.0° C

2.1°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 (10 Jun):

  • Afternoon surf: Afternoon surf (10 Jun, local time) - 1ft (0.3m), 8s period with E swell.
  • Evening surf: Evening surf (10 Jun, local time) - 1.5ft (0.5m), 8s period with E swell.

The current surf forecast for Katahama at 8PM is: 0.4m 11s primary swell from a South direction and 0.5m 8s secondary swell from a East direction (forecast issued at 02:00pm June 10). An open ocean swell of 1.3m 8s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (10 Jun)--
Afternoon (10 Jun)1ft (0.3m)8s
Evening (10 Jun)1.5ft (0.5m)8s

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 3mm), mostly falling on Wed night. Warm (max 23°C on Fri afternoon, min 19°C on Thu night). Wind will be generally light.

Wed
10
Thursday
11
Friday
12
Sat
13
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
0
1
1
1
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)
0.3
E
8
0.3
E
8
0.4
S
11
0.5
E
8
0.4
E
9
0.4
E
8
0.5
E
7
0.5
E
7
0.4
E
7
0.4
E
7
0.3
E
7
0.3
E
7
0.8
SSE
7
0.7
SSE
7
0.7
SSE
7
0.3
E
7
0.5
SSE
7
0.3
E
7
0.3
E
7
0.5
SSE
7
0.3
E
6
0.3
E
6
0.3
E
6
0.3
E
6
Wave Graph
Metric surfscale
Energy kJ
12
12
37
34
23
18
26
26
17
17
9
9
61
55
55
9
27
8
8
28
7
7
6
6
Wind (km/h)
10
SSE
15
S
5
SSW
0
SW
0
WSW
5
S
5
SE
10
SE
15
SSE
15
S
10
S
5
SW
5
W
5
NW
5
NNE
5
E
10
S
15
S
10
SSW
5
W
5
N
5
NNE
10
NE
10
E
Wind State
on
cross-on
cross-on
glassy
glassy
glassy
glassy
on
cross-on
cross-on
cross-on
glassy
glassy
glassy
cross-off
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-on
High Tide
2:52PM1.22m
2:04AM1.48m
3:51PM1.30m
2:40AM1.51m
4:38PM1.37m
3:14AM1.53m
Low Tide
7:54PM0.89m
9:11AM0.41m
8:53PM0.95m
9:50AM0.30m
9:41PM1.00m
part cloud
part cloud
cloud
part cloud
rain showers
rain showers
part cloud
rain showers
cloud
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<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>
6:59
6:59
7:00
7:00
 mm
1
1
1
Temp °C
22
22
21
20
20
20
20
21
21
22
21
21
20
19
19
21
22
23
23
22
20
19
19
21
Feels °C
22
22
22
22
22
22
22
22
20
21
21
22
22
20
20
22
21
22
23
23
21
20
19
21
Swell 1
Height (m)
Direction
Period (s)
1.2
SSW
8
1.2
SSW
8
1.2
SSW
8
1.4
SSW
8
1.5
SSW
9
1.6
SSW
9
1.7
SSW
9
1.7
SSW
9
1.7
SSW
9
1.6
SSW
9
1.5
SSW
9
1.4
SSW
9
1.1
SW
9
1
SW
9
1
SW
9
1.2
SSW
9
0.9
SSW
9
1.1
SSW
9
0.9
SSW
8
0.9
SW
9
0.9
SSW
8
1.1
SSW
8
0.9
SSW
8
0.9
SSW
8
Energy kJ
175
188
202
268
328
388
456
485
456
406
351
308
182
155
152
203
135
168
127
107
125
169
119
96
Swell 2
Height (m)
Direction
Period (s)
0.3
E
8
0.3
E
8
0.4
S
11
0.4
ENE
8
0.4
E
9
0.6
SSW
12
0.5
E
7
0.5
E
7
0.4
E
7
0.4
E
7
0.3
E
7
0.3
E
7
0.8
SSE
7
0.7
SSE
7
0.7
SSE
7
0.3
E
7
0.5
SSE
7
0.3
E
7
0.3
E
7
0.5
SSE
7
0.6
SW
4
0.3
E
6
0.6
SW
4
0.4
SW
4
Energy kJ
12
12
37
24
23
111
26
26
17
17
9
9
61
55
55
9
27
8
8
28
11
6
11
6
Swell 3
Height (m)
Direction
Period (s)
0.3
E
8
0.5
SSW
12
0.4
E
8
0.1
E
15
0.1
E
15
0.1
E
15
0.1
E
15
0.1
E
15
0.1
E
15
0.3
E
7
0.3
E
7
0.3
E
7
0.3
E
7
0.2
SSW
11
0.2
SSW
11
0.3
E
7
0.3
E
6
0.1
SE
13
0.3
E
6
0.3
E
6
Energy kJ
12
81
18
4
4
4
4
4
4
9
9
9
9
13
12
8
7
7
6
6
Wind waves
Height (m)
Direction
Period (s)
0.4
ENE
4
0.5
E
8
0.5
E
4
0.2
WSW
2
0.5
SW
3
0.6
SW
4
0.6
SW
4
0.6
WSW
4
Energy kJ
6
34
9
1
6
13
13
10
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
2
2
2
3
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
Distance (km)
150
94
6
2
2
2
2
13
104
104
208
2
2
2
2
13
94
65
65
2
2
2
2
13
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
2
2
2
2
3
2
2
2
2
2
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
2
2
2
2
3
2
1
1
2
2
2
2
2
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
4
6
8
7
8
9
9
7
6
7
6
6
5
5
5
6
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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