Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.4°C
0.1° 

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 (26 Aug):

  • Morning surf: Morning surf (26 Aug, local time) - 2.5ft (0.8m), 10s period with SSE swell.
  • Afternoon surf: Afternoon surf (26 Aug, local time) - 2.5ft (0.8m), 9s period with SSE swell.
  • Evening surf: Evening surf (26 Aug, local time) - 2.5ft (0.8m), 9s period with SSE swell.

The current surf forecast for Katahama at 7AM is: 1.8m 12s primary swell from a South direction and 0.6m 13s secondary swell from a East direction (forecast issued at 02:00am August 26). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 3.

Time (JST) & DateWave HeightWave Period
Morning (26 Aug)2.5ft (0.8m)10s
Afternoon (26 Aug)2.5ft (0.8m)9s
Evening (26 Aug)2.5ft (0.8m)9s

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


Short Range Forecast

Heavy rain (total 31mm), heaviest during Thu night. Warm (max 30°C on Wed morning, min 24°C on Fri morning). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
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)
3
4
3
2
0
0
0
0
0
1
1
0
1
1
1
1
1
1
1
1
0
0
0
1
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)
2
S
12
1.9
S
12
1.8
S
12
0.8
SSE
10
0.7
SE
9
0.8
SSE
9
0.8
SSE
9
0.8
SSE
9
0.8
SSE
9
0.8
SSE
10
1.2
SW
6
1.3
SW
6
0.9
SSE
10
0.8
S
10
0.8
S
10
0.7
S
9
0.8
S
9
0.8
S
9
0.6
E
13
0.6
S
8
0.8
S
8
0.5
E
12
0.5
E
12
0.5
E
12
Wave Graph
Metric surfscale
Energy kJ
1229
1002
870
120
84
106
96
90
90
123
94
119
184
127
122
85
108
106
114
50
86
74
71
69
Wind (km/h)
15
WSW
15
W
10
W
10
WSW
25
SW
30
SW
25
WSW
20
WSW
15
WSW
20
WSW
20
WSW
20
SW
25
SW
20
SW
15
WSW
5
W
5
W
10
W
5
N
5
W
20
WSW
25
W
20
WSW
15
W
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
4:02AM1.57m
5:24PM1.65m
4:40AM1.64m
5:42PM1.69m
5:15AM1.69m
6:02PM1.73m
Low Tide
10:51PM1.01m
10:51AM0.39m
11:15PM0.91m
11:19AM0.38m
11:38PM0.80m
11:45AM0.41m
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
light rain
light rain
light rain
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:15
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:21
6:20
 mm
1
4
7
6
3
1
3
1
Temp °C
27
27
26
29
30
30
29
28
27
27
27
28
29
29
28
26
25
26
25
24
24
28
27
26
Feels °C
30
31
30
32
30
31
31
31
30
30
30
30
30
31
31
30
29
30
29
28
25
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 

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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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