Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.2°C
0.3° 

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 (23 Aug):

  • Afternoon surf: Afternoon surf (23 Aug, local time) - 1.5ft (0.4m), 12s period with ESE swell.
  • Evening surf: Evening surf (23 Aug, local time) - 2ft (0.6m), 12s period with SSE swell.

The current surf forecast for Katahama at 10PM is: 0.6m 12s primary swell from a South-southeast direction (forecast issued at 02:00pm August 23). An open ocean swell of 0.7m 8s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (23 Aug)--
Afternoon (23 Aug)1.5ft (0.4m)12s
Evening (23 Aug)2ft (0.6m)12s

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


Short Range Forecast

Mostly dry. Warm (max 30°C on Wed morning, min 25°C on Sun night). Wind will be generally light.

Sun
23
Monday
24
Tuesday
25
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
1
1
1
2
3
3
2
2
2
4
4
4
4
2
2
1
3
4
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)
0.5
E
10
0.4
ESE
12
0.5
SE
12
0.6
SSE
12
0.6
SSE
13
0.6
SSE
17
0.9
SSE
16
1
SSE
18
1.7
SSE
16
1.9
SSE
15
1.6
SSE
14
2.1
SSE
15
2.3
SSE
15
2.2
SSE
14
2.3
SSE
14
2.3
SSE
13
2.2
SSE
13
2.2
SSE
12
2.1
S
12
2.1
S
13
Wave Graph
Metric surfscale
Energy kJ
48
49
73
98
108
186
452
644
1451
1698
1042
2029
2182
1835
1905
1877
1581
1405
1378
1468
Wind (km/h)
15
SSE
10
SSE
5
SE
0
SE
5
W
5
WNW
5
NW
0
SSW
15
SSW
15
SW
15
SW
15
WSW
10
WSW
10
WSW
10
WSW
15
SW
20
SW
30
SW
20
WSW
15
WSW
Wind State
on
cross-on
glassy
glassy
glassy
glassy
glassy
glassy
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
High Tide
4:19PM1.48m
2:17AM1.43m
4:45PM1.55m
3:17AM1.50m
5:06PM1.61m
Low Tide
9:44PM1.21m
9:38AM0.47m
10:24PM1.11m
10:18AM0.41m
part cloud
part cloud
part cloud
cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:25
6:24
6:23
 mm
Temp °C
27
27
27
26
26
25
25
27
28
29
28
27
26
26
26
28
29
28
28
27
Feels °C
29
31
32
31
30
29
29
31
30
31
31
30
30
30
30
30
30
28
29
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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