Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 03 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 (03 Sep):

  • Morning surf: Morning surf (03 Sep, local time) - 2.5ft (0.7m), 11s period with E swell.
  • Afternoon surf: Afternoon surf (03 Sep, local time) - 2ft (0.6m), 10s period with E swell.
  • Evening surf: Evening surf (03 Sep, local time) - 1.5ft (0.5m), 10s period with E swell.

The current surf forecast for Katahama at 9AM is: 0.7m 11s primary swell from a East direction (forecast issued at 02:00am September 03). An open ocean swell of 0.8m 9s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (03 Sep)2.5ft (0.7m)11s
Afternoon (03 Sep)2ft (0.6m)10s
Evening (03 Sep)1.5ft (0.5m)10s

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


Short Range Forecast

Heavy rain (total 56mm), heaviest during Fri night. Warm (max 30°C on Thu morning, min 21°C on Fri night). Winds increasing (calm on Thu night, strong winds from the NE by Sat night).

Thursday
3
Friday
4
Saturday
5
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
1
1
0
0
0
1
1
1
0
1
0
0
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
Wave
Height (m)
Direction
Period (s)
0.6
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
0.5
E
10
0.4
E
9
0.4
E
9
0.4
ESE
6
0.4
E
9
0.4
E
9
0.4
E
9
0.8
E
7
1.1
E
6
1.3
E
6
1.6
E
6
1.8
E
6
2
E
6
Wave Graph
Metric surfscale
Energy kJ
74
112
114
112
100
71
69
48
48
47
30
45
27
27
16
26
26
30
57
75
122
184
245
311
Wind (km/h)
5
NE
5
NE
0
NNE
5
W
15
SW
20
SW
20
WSW
10
W
5
E
5
SSE
0
NNE
5
NNE
5
NE
10
NNW
15
N
15
N
15
NNE
20
NE
25
NE
25
NE
30
NE
25
NE
25
NE
30
NE
Wind State
glassy
cross
glassy
glassy
cross
cross
cross-off
cross-off
glassy
glassy
glassy
glassy
glassy
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross
cross
cross
High Tide
9:42AM1.34m
8:51PM1.59m
11:47AM1.25m
9:34PM1.48m
2:56PM1.34m
Low Tide
3:19AM0.56m
2:44PM1.03m
4:27AM0.62m
3:30PM1.19m
6:01AM0.65m
6:23PM1.30m
cloud
part cloud
thunderstorm
part cloud
cloud
cloud
cloud
part cloud
thunderstorm
cloud
cloud
cloud
cloud
cloud
light rain
light rain
heavy rain
heavy rain
light rain
light rain
mod rain
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:12
6:09
6:08
 mm
1
1
1
3
12
15
3
5
7
3
4
2
Temp °C
26
26
26
27
30
29
29
27
25
25
25
26
27
26
23
21
21
21
21
21
21
21
22
22
Feels °C
31
30
31
31
32
31
30
29
29
29
30
30
31
28
24
22
22
21
20
20
19
19
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.


Nearest locationNearest