Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.1° C
0.4° 

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 (10 Aug):

  • Afternoon surf: Afternoon surf (10 Aug, local time) - 5ft (1.5m), 12s period with E swell.
  • Evening surf: Evening surf (10 Aug, local time) - 4.5ft (1.4m), 11s period with E swell.

The current surf forecast for Katahama at 11PM is: 1.4m 11s primary swell from a East direction (forecast issued at 02:00pm August 10). An open ocean swell of 1.0m 11s is not directed at the surf break, a second open ocean swell of 1.9m 11s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (10 Aug)--
Afternoon (10 Aug)5ft (1.5m)12s
Evening (10 Aug)4.5ft (1.4m)11s

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


Short Range Forecast

Moderate rain (total 19mm), heaviest on Mon night. Warm (max 27°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light.

Mon
10
Tuesday
11
Wednesday
12
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
1
2
3
2
3
1
0
0
1
0
2
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
Wave
Height (m)
Direction
Period (s)
1.4
E
12
1.5
E
12
1.4
E
12
1.4
E
11
1.5
E
11
1.5
E
11
1.4
E
11
1.4
E
10
1.3
E
11
1.3
E
12
1.2
E
11
1.1
E
12
1
SW
5
0.8
E
11
0.7
E
11
1.5
E
5
1.6
E
6
1.6
ESE
6
1.6
ESE
6
1.4
ESE
6
Wave Graph
Metric surfscale
Energy kJ
556
628
538
502
526
517
434
410
411
446
367
319
41
160
114
121
169
179
179
122
Wind (km/h)
15
SSW
15
SSW
5
S
5
ESE
5
SSE
5
SSW
5
SSE
10
SSE
15
S
15
SSW
15
SW
5
S
0
SW
20
ESE
20
E
20
ENE
25
ENE
25
ENE
25
ENE
20
ENE
Wind State
cross
cross-on
cross-on
glassy
cross-on
glassy
on
cross-on
cross-on
cross
cross
glassy
glassy
cross-on
cross-on
cross-on
cross
cross
cross
cross
High Tide
5:12PM1.55m
3:38AM1.54m
5:33PM1.60m
4:20AM1.60m
5:51PM1.64m
Low Tide
10:08AM0.39m
10:43PM1.12m
10:44AM0.34m
11:10PM1.03m
11:15AM0.31m
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
cloud
cloud
light rain
light rain
part cloud
cloud
light rain
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:39
6:38
 mm
1
2
2
2
3
2
2
1
1
1
1
1
Temp °C
28
27
26
25
25
23
23
23
23
25
26
26
25
24
23
24
24
24
25
25
Feels °C
30
29
30
29
29
27
26
25
24
27
27
29
29
24
22
23
22
22
24
24
  • 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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