Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.5° C
1.0° 

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 (09 Aug):

  • Morning surf: Morning surf (09 Aug, local time) - 5ft (1.6m), 13s period with ESE swell.
  • Afternoon surf: Afternoon surf (09 Aug, local time) - 5ft (1.5m), 13s period with E swell.
  • Evening surf: Evening surf (09 Aug, local time) - 4.5ft (1.4m), 13s period with ESE swell.

The current surf forecast for Katahama at 4AM is: 1.5m 14s primary swell from a East-southeast direction (forecast issued at 08:00pm August 08). An open ocean swell of 1.7m 11s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 3.

Time (JST) & DateWave HeightWave Period
Morning (09 Aug)5ft (1.6m)13s
Afternoon (09 Aug)5ft (1.5m)13s
Evening (09 Aug)4.5ft (1.4m)13s

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


Short Range Forecast

Moderate rain (total 14mm), heaviest on Sun night. Warm (max 28°C on Sun morning, min 23°C on Mon night). Wind will be generally light.

Sat
8
Sunday
9
Monday
10
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
3
3
3
3
2
1
1
1
3
3
2
3
3
1
1
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
ESE
12
1.3
ESE
13
1.4
ESE
13
1.5
ESE
14
1.5
ESE
14
1.6
ESE
13
1.6
ESE
13
1.5
E
13
1.4
ESE
13
1.4
ESE
13
1.4
E
12
1.3
E
12
1.4
E
12
1.4
E
12
1.4
E
12
1.4
E
12
1.4
E
12
1.4
E
12
Wave Graph
Metric surfscale
Energy kJ
344
522
594
838
780
849
836
799
679
648
593
497
584
575
556
538
538
529
Wind (km/h)
10
SSE
5
S
5
WSW
5
NNW
5
NNE
5
SE
15
SSE
15
S
10
S
5
SW
0
S
0
NE
5
NE
5
SE
10
S
15
SSW
10
SSW
5
S
Wind State
on
glassy
glassy
glassy
glassy
on
cross-on
cross-on
cross-on
glassy
glassy
glassy
glassy
glassy
cross-on
cross-on
cross-on
glassy
High Tide
4:11PM1.39m
1:39AM1.44m
4:46PM1.49m
2:47AM1.48m
5:12PM1.55m
Low Tide
8:50PM1.25m
9:22AM0.46m
10:05PM1.19m
10:08AM0.39m
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:01
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:43
6:42
6:40
 mm
2
3
1
1
Temp °C
27
27
26
25
25
27
28
28
27
26
25
25
25
26
27
27
26
25
Feels °C
31
32
32
29
29
31
31
30
30
30
30
30
30
30
29
29
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 

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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