Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 16 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
25.3° C
0.9° 

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 (17 Jul):

  • Morning surf: Morning surf (17 Jul, local time) - 2ft (0.6m), 9s period with E swell.
  • Afternoon surf: Afternoon surf (17 Jul, local time) - 2ft (0.6m), 9s period with E swell.
  • Evening surf: Evening surf (17 Jul, local time) - 2ft (0.6m), 9s period with E swell.

The current surf forecast for Katahama at 2AM is: 0.6m 9s primary swell from a East direction (forecast issued at 08:00pm July 16). An open ocean swell of 0.9m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (17 Jul)2ft (0.6m)9s
Afternoon (17 Jul)2ft (0.6m)9s
Evening (17 Jul)2ft (0.6m)9s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Fri night. Warm (max 29°C on Thu night, min 25°C on Fri night). Wind will be generally light.

Thu
16
Friday
17
Saturday
18
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
1
1
0
0
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
Wave
Height (m)
Direction
Period (s)
0.6
E
8
0.6
E
8
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
Wave Graph
Metric surfscale
Energy kJ
52
52
56
57
56
56
55
54
55
55
52
51
51
52
59
61
60
61
Wind (km/h)
10
SSW
5
WSW
5
NNE
5
NE
10
ENE
10
ESE
15
SE
20
SE
15
ESE
15
ESE
20
ESE
15
ESE
10
ESE
10
E
15
SE
15
SE
10
SE
10
ESE
Wind State
cross
glassy
glassy
cross
cross
cross-on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
High Tide
7:09PM1.64m
6:18AM1.64m
7:38PM1.66m
7:02AM1.60m
8:10PM1.67m
Low Tide
00:51AM0.89m
1:03PM0.25m
1:32AM0.82m
1:38PM0.34m
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
thunderstorm
rain showers
rain showers
part cloud
part cloud
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:45
4:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
6:59
 mm
1
1
1
Temp °C
29
29
28
27
27
29
29
29
28
27
26
25
25
27
27
27
27
26
Feels °C
33
34
33
32
31
32
32
31
31
30
28
27
28
30
28
29
30
30
  • 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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