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Katahama surfForecast / Shizuoka / Japan

information circle12 Day Weather and Surf, issued 8 am Monday 18 Aug 2025 JST
Forecast update in hr  min  s Forecast update imminent
Katahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Katahama sea temperature is
27.3° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Katahama this week:

The surf forecast for Katahama over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 18) at 9PM. The primary swell is predicted to be 1.0m and 5s period with a secondary swell of 0.4m and 12s. Another secondary swell of 0.3m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Katahama in the next 12 days are 1.2m 5s and forecast to arrive on Tuesday (Aug 19) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Thursday (Aug 21) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 18th Aug)3.5ft (1.0m) 5s
Best Surf 9PM (Mon 18th Aug)3.5ft (1.0m) 5s
Most Powerful 3PM (Tue 19th Aug)4ft (1.2m) 5s

Table - best surf conditions forecast for Katahama over the next 12 days.

Hourly12 Days
Shizuoka Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 

Short Range Forecast Some drizzle, heaviest during Tue night. Warm (max 30°C on Mon morning, min 26°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 30°C on Thu morning, min 26°C on Thu night). Wind will be generally light.

Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
SE
0.4
SE
0.4
SE
0.3
SE
1.2
SW
0.3
SE
0.8
SW
1
SW
0.8
SW
0.2
SSE
0.2
ESE
0.2
ESE
0.2
ESE
0.3
SE
0.3
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
1.1
SW
0.3
ESE
Period(s) (?)1212121151154510131212109998858
Wave
Graph
(?)Metric surfscale
Energy (?)49951025311776497644152621142624302520237820
Wind
(km/h)
5
SSW
20
SW
5
W
10
SW
25
SW
15
WSW
15
WSW
25
SW
20
WSW
5
WSW
20
SW
0
W
10
E
20
SW
15
W
20
WSW
25
SW
15
WSW
10
WSW
25
SW
5
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscrosscross-
off		crosscrosscross-
off		cross-
off		crosscross-
off		glasscrossglasscross-
on		crosscross-
off		cross-
off		crosscross-
off		cross-
off		crosscross-
off
High Tide
/ height (m)
3:48PM
1.36
12:49AM
1.41
4:28PM
1.47
2:19AM
1.44
4:54PM
1.55
3:18AM
1.50
5:15PM
1.60
4:03AM
1.57
5:34PM
1.64
4:42AM
1.64
5:52PM
1.68
5:18AM
1.69
6:12PM
1.72
Low Tide
/ height (m)
7:58PM
1.28
8:50AM
0.53
9:47PM
1.22
9:44AM
0.45
10:29PM
1.13
10:25AM
0.39
10:57PM
1.04
10:57AM
0.36
11:21PM
0.94
11:25AM
0.35
11:44PM
0.84
11:52AM
0.37
12:10AM
0.73
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Sunrise5:09--5:09--5:09--5:11--5:11--5:11--5:13--
Sunset-6:31--6:30--6:30--6:29--6:27--6:25--6:24-
clearclearpart cloudclearclearthunderstorm clearclearclearclearclearclearclearclearclearclearclearpart cloudpart cloudclearthunderstorm
Rain (mm)
-----1--------------2
Temp. °C303027292927302927303028293027302927303027
Feels °C (?)323131303030313027313032323030312930313131
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Shizuoka

  1. weather stationWind Update Continuing clean conditions at Katahama (calm at Sumiyoshi wx 5 km from Katahama). 0.2m 10s swell from the ESE with a 0.1m 12s groundswell from the E. 2 swells combining to make bigger set waves.

    1 hour 19 minutes ago Katahama
Expand
<
>
View all

1 h 19 min ago

3 km/h
S
Clean
Please reload the page to see if there are any updates.

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.

View detailed surf forecast for Katahama at:
surf-forecast.com

Information about the Katahama Surf forecast

The above surf forecast table for Katahama provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Katahama can be found by selecting the local surf guide option on the grey menu. Our Katahama surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Katahama) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Katahama may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Katahama is 4 km (2 miles) from the city of Sagara. If you plan a holiday in Shizuoka, look for hotels and other accommodation in Sagara. Sagara has rooms for a wide range of budgets as well as car hire and transport links.

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