Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 06 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.9° C
0.5° 

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 (06 Aug):

  • Morning surf: Morning surf (06 Aug, local time) - 10ft (3.0m), 13s period with SSE swell.
  • Afternoon surf: Afternoon surf (06 Aug, local time) - 10ft (3.0m), 14s period with SSE swell.
  • Evening surf: Evening surf (06 Aug, local time) - 10ft (3.0m), 14s period with SSE swell.

The current surf forecast for Katahama at 12PM is: 3.0m 13s primary swell from a South-southeast direction and 0.1m 16s secondary swell from a East direction, 1.0m 10s secondary swell from a East direction (forecast issued at 08:00am August 06). The wind direction is predicted to be cross-onshore and the swell rating is 11.

Time (JST) & DateWave HeightWave Period
Morning (06 Aug)10ft (3.0m)13s
Afternoon (06 Aug)10ft (3.0m)14s
Evening (06 Aug)10ft (3.0m)14s

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


Short Range Forecast

Mostly dry. Warm (max 30°C on Thu morning, min 25°C on Fri night). Wind will be generally light.

Thursday
6
Friday
7
Saturday
8
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)
!
!
!
0
0
!
!
!
!
1
1
1
2
1
1
0
0
0
0
0
0
2
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)
3
SSE
14
3
SSE
13
3
SSE
13
3
SSE
14
3.5
SSE
14
3
SSE
14
3
S
13
3
S
13
3
S
13
2.5
S
12
2.5
S
12
2.4
S
12
2.3
S
12
1.1
ESE
10
1.1
ESE
9
1
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
10
0.9
ESE
10
1
ESE
12
1.2
ESE
13
Wave Graph
Metric surfscale
Energy kJ
3331
3309
3399
3703
4020
3772
2959
2914
2587
2050
1776
1573
1396
210
197
189
156
156
159
166
329
447
Wind (km/h)
20
NE
20
ENE
20
E
25
ESE
25
ESE
15
E
15
ENE
15
NE
15
NE
15
E
20
SE
20
SE
15
SE
10
ESE
10
E
10
ESE
5
E
10
E
15
SSE
15
SSE
10
SSE
5
SE
Wind State
cross
cross-on
cross-on
on
on
cross-on
cross-on
cross
cross
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
on
on
on
glassy
High Tide
12:14PM1.20m
10:43PM1.50m
3:02PM1.27m
00:04AM1.44m
4:11PM1.39m
Low Tide
5:20AM0.65m
4:17PM1.09m
6:50AM0.62m
6:01PM1.23m
8:19AM0.55m
8:50PM1.25m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:00
5:00
5:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:44
6:43
 mm
Temp °C
26
28
30
30
28
27
27
26
26
28
29
28
27
27
26
25
25
27
28
28
27
26
Feels °C
27
29
31
31
29
29
30
28
28
29
31
30
30
31
30
29
29
30
29
30
30
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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