Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 27 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.8°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 (27 Aug):

  • Afternoon surf: Afternoon surf (27 Aug, local time) - 2.5ft (0.8m), 10s period with S swell.
  • Evening surf: Evening surf (27 Aug, local time) - 3.5ft (1.1m), 6s period with SW swell.

The current surf forecast for Katahama at 11PM is: 1.2m 6s primary swell from a Southwest direction and 0.7m 9s secondary swell from a South direction (forecast issued at 02:00pm August 27). An open ocean swell of 0.8m 10s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (27 Aug)--
Afternoon (27 Aug)2.5ft (0.8m)10s
Evening (27 Aug)3.5ft (1.1m)6s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Thu night. Warm (max 30°C on Thu afternoon, min 24°C on Thu night). Wind will be generally light.

Thu
27
Friday
28
Saturday
29
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
1
1
0
1
0
0
1
1
1
1
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)
0.9
SSE
10
0.8
S
10
0.8
S
10
1.1
SW
6
1.3
SW
6
0.5
E
13
0.5
E
13
0.6
S
9
1.1
SW
6
0.5
E
12
0.5
E
12
0.5
E
12
0.5
E
12
0.4
E
12
0.4
E
12
0.4
E
12
0.7
SSW
6
0.4
E
12
0.4
E
11
0.4
E
11
Wave Graph
Metric surfscale
Energy kJ
184
130
122
86
116
87
79
55
80
74
71
69
68
44
43
42
0
42
41
39
Wind (km/h)
25
SW
25
SW
20
WSW
20
WSW
20
WSW
10
W
15
W
20
W
25
W
25
WSW
20
W
10
W
10
NW
5
N
5
NE
10
ESE
5
SSE
10
SW
15
WSW
10
W
Wind State
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
glassy
glassy
cross-on
cross-on
cross
cross-off
cross-off
High Tide
5:42PM1.69m
5:15AM1.69m
6:02PM1.73m
5:51AM1.72m
6:23PM1.76m
Low Tide
11:19AM0.38m
11:38PM0.80m
11:45AM0.41m
00:04AM0.69m
12:11PM0.45m
thunderstorm
part cloud
cloud
cloud
thunderstorm
thunderstorm
light rain
cloud
light rain
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:21
6:20
6:17
 mm
1
3
3
1
1
Temp °C
29
30
28
28
27
26
24
27
25
27
27
26
26
26
26
27
27
28
27
27
Feels °C
30
31
30
30
29
30
26
28
24
26
28
29
29
30
30
30
31
31
29
30
  • 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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