Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.8°C
0.5° 

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 (02 Sep):

  • Afternoon surf: Afternoon surf (02 Sep, local time) - 2.5ft (0.7m), 10s period with E swell.
  • Evening surf: Evening surf (02 Sep, local time) - 2.5ft (0.8m), 10s period with E swell.

The current surf forecast for Katahama at 8PM is: 0.8m 10s primary swell from a East direction (forecast issued at 02:00pm September 02). An open ocean swell of 0.8m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (02 Sep)--
Afternoon (02 Sep)2.5ft (0.7m)10s
Evening (02 Sep)2.5ft (0.8m)10s

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


Short Range Forecast

Heavy rain (total 141mm), heaviest during Fri afternoon. Warm (max 29°C on Thu afternoon, min 20°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NE by Fri night).

Wed
2
Thursday
3
Friday
4
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
1
0
1
0
1
0
1
1
1
0
1
0
1
0
0
0
0
Swell
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
E
11
0.7
E
10
0.7
E
10
0.8
E
10
0.7
E
10
0.7
E
11
0.7
E
11
0.7
E
11
0.7
E
10
0.6
E
10
0.6
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.4
E
10
0.7
ESE
9
0.4
E
9
0.4
E
9
1
NE
4
1.3
ENE
5
Wave Graph
Metric surfscale
Energy kJ
110
102
96
125
100
112
114
112
100
69
69
48
48
47
30
86
27
27
33
78
Wind (km/h)
10
SE
10
SSE
10
SE
5
E
5
NE
5
NE
5
NE
5
S
10
SW
15
WSW
10
W
10
NW
5
N
5
WSW
10
N
10
N
15
N
20
NE
25
NNE
30
NE
Wind State
on
cross-on
on
glassy
cross
glassy
cross
glassy
cross
cross-off
cross-off
off
glassy
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross
High Tide
8:17PM1.69m
9:42AM1.34m
8:51PM1.59m
11:47AM1.25m
Low Tide
2:09PM0.88m
3:19AM0.56m
2:44PM1.03m
4:27AM0.62m
3:30PM1.19m
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
thunderstorm
cloud
thunderstorm
cloud
cloud
cloud
cloud
light rain
mod rain
heavy rain
heavy rain
heavy rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:13
6:12
6:09
 mm
1
1
1
8
13
24
38
15
Temp °C
28
28
27
27
26
26
26
27
27
29
28
27
26
26
22
22
22
22
21
21
Feels °C
31
30
31
32
30
31
30
32
30
31
30
29
28
29
24
24
24
22
20
19
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Katahama surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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