Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.7°C
0.2° 

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 (29 Aug):

  • Afternoon surf: Afternoon surf (29 Aug, local time) - 1.5ft (0.4m), 12s period with E swell.
  • Evening surf: Evening surf (29 Aug, local time) - 1.5ft (0.4m), 11s period with E swell.

The current surf forecast for Katahama at 6PM is: 0.4m 11s primary swell from a East direction (forecast issued at 02:00pm August 29). An open ocean swell of 0.4m 8s is not directed at the surf break, a second open ocean swell of 1.0m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (29 Aug)--
Afternoon (29 Aug)1.5ft (0.4m)12s
Evening (29 Aug)1.5ft (0.4m)11s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Sat night. Warm (max 28°C on Mon morning, min 24°C on Sat night). Wind will be generally light.

Sat
29
Sunday
30
Monday
31
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
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
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)
0.4
E
12
0.4
E
12
0.4
E
11
0.4
E
11
0.4
E
11
0.3
E
11
1
SW
6
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
SE
10
0.2
ENE
5
0.4
SW
10
0.4
E
3
0.3
ESE
14
0.4
ESE
14
0.4
ESE
14
Wave Graph
Metric surfscale
Energy kJ
42
42
41
39
38
21
0
22
22
22
22
22
21
16
3
0
2
38
64
74
Wind (km/h)
5
W
5
WNW
10
WSW
5
NNW
10
E
10
ESE
10
ESE
10
ESE
10
ESE
10
SSE
10
SSE
10
ESE
10
ENE
5
ENE
10
NE
10
ENE
10
E
10
SE
5
ESE
10
NNE
Wind State
glassy
off
cross-off
glassy
cross-on
cross-on
cross-on
on
on
on
on
cross-on
cross-on
cross
cross
cross-on
cross-on
on
glassy
cross-off
High Tide
6:23PM1.76m
6:28AM1.72m
6:48PM1.79m
7:07AM1.67m
7:15PM1.79m
Low Tide
12:11PM0.45m
00:33AM0.59m
12:38PM0.51m
1:06AM0.53m
1:07PM0.61m
thunderstorm
part cloud
part cloud
thunderstorm
light rain
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:16
6:15
 mm
1
2
1
Temp °C
26
26
27
26
25
24
24
24
25
25
25
25
25
25
25
26
28
28
27
26
Feels °C
31
31
31
31
28
27
27
27
28
28
28
29
29
29
28
28
31
31
31
29
  • 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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