Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 28 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 (28 Aug):

  • Morning surf: Morning surf (28 Aug, local time) - 2ft (0.6m), 9s period with S swell.
  • Afternoon surf: Afternoon surf (28 Aug, local time) - 2.5ft (0.8m), 8s period with S swell.
  • Evening surf: Evening surf (28 Aug, local time) - 1.5ft (0.5m), 12s period with E swell.

The current surf forecast for Katahama at 6AM is: 0.5m 13s primary swell from a East direction and 0.7m 9s secondary swell from a South direction (forecast issued at 02:00am August 28). An open ocean swell of 1.7m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (28 Aug)2ft (0.6m)9s
Afternoon (28 Aug)2.5ft (0.8m)8s
Evening (28 Aug)1.5ft (0.5m)12s

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


Short Range Forecast

Moderate rain (total 11mm), heaviest on Fri morning. Warm (max 27°C on Sat morning, min 24°C on Fri morning). Wind will be generally light.

Friday
28
Saturday
29
Sunday
30
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
1
0
1
1
1
0
0
1
1
0
1
0
0
0
0
0
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
SW
6
0.6
E
13
0.5
E
13
0.6
S
9
0.5
E
12
0.8
S
8
0.5
E
12
0.5
E
12
0.4
E
12
0.5
S
8
0.4
E
12
0.4
S
8
0.4
E
12
0.4
E
12
0.4
E
11
0.4
E
11
1
E
5
0.4
SE
10
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
Wave Graph
Metric surfscale
Energy kJ
92
125
79
55
77
84
71
69
44
31
43
19
42
42
40
39
43
31
21
22
22
22
22
22
Wind (km/h)
15
WSW
20
WSW
10
W
10
WNW
5
WSW
20
WSW
20
W
5
WNW
5
WNW
5
NW
5
ENE
5
SE
10
SSE
10
SE
10
SE
10
ESE
10
ENE
10
E
10
ENE
10
ENE
10
E
10
E
10
E
5
ENE
Wind State
cross-off
cross-off
cross-off
off
glassy
cross-off
cross-off
off
glassy
glassy
glassy
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
High Tide
5:15AM1.69m
6:02PM1.73m
5:51AM1.72m
6:23PM1.76m
6:28AM1.72m
6:48PM1.79m
Low Tide
11:38PM0.80m
11:45AM0.41m
00:04AM0.69m
12:11PM0.45m
00:33AM0.59m
12:38PM0.51m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
cloud
part cloud
cloud
rain showers
light rain
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:20
6:17
6:16
 mm
2
5
4
3
6
1
1
Temp °C
28
27
25
24
24
25
26
25
26
26
26
27
27
27
26
26
24
24
24
24
24
25
24
24
Feels °C
31
30
28
27
29
26
27
28
30
30
31
31
30
30
30
30
27
27
27
26
26
28
27
28
  • 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 

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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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