Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 27 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 (27 Aug):

  • Morning surf: Morning surf (27 Aug, local time) - 3ft (0.9m), 9s period with SSE swell.
  • 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) - 4.5ft (1.3m), 6s period with SW swell.

The current surf forecast for Katahama at 4PM is: 0.8m 10s primary swell from a South direction and 1.2m 6s secondary swell from a Southwest direction (forecast issued at 08:00am August 27). An open ocean swell of 0.9m 10s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (27 Aug)3ft (0.9m)9s
Afternoon (27 Aug)2.5ft (0.8m)10s
Evening (27 Aug)4.5ft (1.3m)6s

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


Short Range Forecast

Moderate rain (total 18mm), heaviest on Thu night. Warm (max 29°C on Thu morning, min 23°C on Fri morning). Wind will be generally light.

Thursday
27
Friday
28
Saturday
29
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
1
0
0
1
1
1
1
2
2
0
0
0
1
1
1
0
0
0
0
0
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)
0.8
SSE
10
0.9
SSE
9
0.9
SSE
10
0.8
S
10
0.8
S
10
1.3
SW
6
0.7
S
9
0.5
E
13
1.3
SW
6
1.1
SW
6
0.5
E
12
0.5
E
12
0.5
E
12
0.5
E
12
0.5
E
12
0.5
E
12
0.4
E
12
0.4
E
12
0.5
SW
10
0.9
SW
6
0.4
E
11
0.4
E
11
Wave Graph
Metric surfscale
Energy kJ
120
141
184
130
122
119
80
84
114
78
77
74
71
69
68
68
44
42
0
54
40
39
Wind (km/h)
20
WSW
25
WSW
25
SW
25
SW
20
SW
15
WSW
15
WSW
10
W
10
W
10
WNW
20
W
20
W
20
W
5
NW
5
NNW
10
N
10
ENE
10
E
10
SE
10
SSE
5
SSE
5
SW
Wind State
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross
cross-on
on
on
glassy
glassy
High Tide
4:40AM1.64m
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
part cloud
part cloud
part cloud
part cloud
cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
light rain
cloud
cloud
cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
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
5
4
1
4
1
Temp °C
27
29
29
29
29
28
27
25
24
23
25
29
28
26
26
26
26
27
27
27
27
26
Feels °C
30
31
30
30
31
31
31
29
27
26
26
29
29
29
29
29
29
29
29
31
32
31
  • 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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