Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 04 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
23.2° C

1.6°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 (04 Jul):

  • Morning surf: Morning surf (04 Jul, local time) - 1ft (0.3m), 9s period with E swell.
  • Afternoon surf: Afternoon surf (04 Jul, local time) - 1ft (0.3m), 9s period with E swell.
  • Evening surf: Evening surf (04 Jul, local time) - 1ft (0.3m), 8s period with ESE swell.

The current surf forecast for Katahama at 11AM is: 0.3m 9s primary swell from a East direction and 0.3m 2s secondary swell from a East direction (forecast issued at 02:00am July 04). An open ocean swell of 0.4m 7s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (04 Jul)1ft (0.3m)9s
Afternoon (04 Jul)1ft (0.3m)9s
Evening (04 Jul)1ft (0.3m)8s

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 26mm), heaviest during Mon afternoon. Warm (max 24°C on Sat morning, min 20°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the NE by Mon night).

Saturday
4
Sunday
5
Monday
6
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)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
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)
0.3
ESE
9
0.3
ESE
9
0.3
E
9
0.3
E
9
0.3
E
9
0.3
E
9
0.3
E
9
0.3
ESE
8
0.3
ESE
9
0.2
ESE
11
0.3
E
11
0.3
E
10
0.4
ESE
8
0.4
ESE
10
0.9
ESE
5
1.2
ESE
5
1.5
ESE
6
1.6
E
6
2
E
6
2.1
E
7
2.1
E
7
2
E
7
1.9
ESE
8
1.9
ESE
7
Wave Graph
Metric surfscale
Energy kJ
16
16
14
14
13
13
13
14
15
11
20
19
24
33
35
64
130
177
292
389
428
439
416
405
Wind (km/h)
5
E
5
ENE
5
ENE
10
E
10
SE
10
SSE
10
SW
0
SE
10
ESE
15
ENE
10
ENE
10
ENE
15
ESE
15
ESE
15
ESE
20
E
15
NE
20
NE
20
ENE
20
NE
20
ENE
25
ENE
25
ENE
30
NE
Wind State
glassy
glassy
cross
cross-on
on
on
cross
glassy
cross-on
cross-on
cross
cross
cross-on
cross-on
on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
7:29AM1.51m
8:51PM1.60m
8:22AM1.41m
9:32PM1.58m
9:25AM1.30m
Low Tide
2:07AM0.86m
2:10PM0.35m
3:00AM0.81m
2:52PM0.48m
3:59AM0.77m
3:36PM0.64m
part cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
light rain
light rain
part cloud
part cloud
part cloud
cloud
cloud
light rain
light rain
light rain
light rain
cloud
cloud
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:37
4:39
4:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:02
7:02
 mm
1
1
1
2
1
1
2
1
1
1
4
4
Temp °C
22
22
22
23
24
23
22
21
21
21
22
23
24
24
23
22
22
21
21
21
22
22
21
20
Feels °C
25
25
24
25
26
25
24
24
23
22
24
25
25
24
24
22
23
21
20
20
21
21
20
18
Swell 1
Height (m)
Direction
Period (s)
0.6
SW
7
0.7
SW
7
0.7
SSW
7
0.4
SW
7
0.4
SW
6
0.5
SSW
6
0.4
SW
6
0.4
SW
6
0.4
SW
6
0.4
SW
6
0.3
E
11
0.4
SE
4
0.5
SE
4
0.6
SE
5
0.4
ESE
10
0.4
SW
6
0.4
SW
6
0.4
SW
6
0.5
SE
16
0.6
SE
16
0.5
SE
15
0.6
SE
15
0.8
SE
14
0.8
SE
13
Energy kJ
38
46
40
15
15
22
10
10
9
9
20
5
9
18
33
14
15
14
124
153
106
171
231
215
Swell 2
Height (m)
Direction
Period (s)
0.4
SSE
5
0.3
ESE
9
0.3
E
9
0.3
E
9
0.3
E
9
0.3
E
9
0.3
E
9
0.3
ESE
8
0.3
ESE
9
0.2
ESE
11
0.3
SW
6
0.3
E
10
0.4
ESE
8
0.4
ESE
10
0.3
SW
6
0.1
SE
9
0.3
ESE
10
0.4
SE
17
0.4
SW
6
0.3
SW
6
0.3
SE
12
0.4
SE
12
0.3
SW
6
0.4
SW
7
Energy kJ
10
16
14
14
13
13
13
14
15
11
5
19
24
33
6
3
21
107
14
6
23
37
6
12
Swell 3
Height (m)
Direction
Period (s)
0.3
ESE
9
0.2
ESE
12
0.2
ESE
12
0.1
SE
9
0.3
S
5
0.2
ESE
12
0.2
SSE
9
0.2
ESE
4
0.2
ESE
11
0.2
ESE
8
0.1
SE
8
0.2
WSW
6
0.1
SW
6
0.1
SW
5
0.1
SE
9
0.1
SE
19
0.1
SE
15
0.3
ESE
10
0.2
SSW
8
0.2
SSW
8
0.3
SW
6
0.3
SW
6
0.1
S
7
0.3
SE
11
Energy kJ
16
14
14
3
4
13
8
1
12
7
3
3
1
1
3
14
9
22
6
6
7
6
1
19
Wind waves
Height (m)
Direction
Period (s)
0.3
E
3
0.3
E
3
0.4
ENE
7
0.4
SE
5
0.3
E
2
0.2
ESE
3
0.2
SSW
2
0.3
SSW
5
0.2
ESE
4
0.3
ESE
3
0.2
ENE
2
0.4
ENE
3
0.4
ENE
3
0.9
ESE
5
1.2
ESE
5
1.5
ESE
6
1.6
E
6
2
E
6
2.1
E
7
2.1
E
7
2
E
7
1.9
ESE
8
1.9
ESE
7
Energy kJ
2
1
15
10
1
1
1
5
1
2
1
4
4
35
64
130
177
292
389
428
439
416
405
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
2
2
1
1
Distance (km)
13
13
13
208
386
208
208
208
178
179
179
415
437
664
664
373
132
13
124
85
103
104
124
137
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
3
Header Global
Rating
(10 max)
7
8
5
8
7
6
6
5
6
4
5
5
9
9
9
8
7
5
5
5
6
5
6
8
  • 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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