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Yasuda Rivermouth surfForecast / Shikoku / Japan

information circle12 Day Weather and Surf, issued 2 pm Sunday 17 Aug 2025 JST
Forecast update in hr  min  s Forecast update imminent
Yasuda Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Yasuda Rivermouth sea temperature is
29.2° C
 (Which is 1.5°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Yasuda Rivermouth this week:

The surf forecast for Yasuda Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 17) at 9PM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.3m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Yasuda Rivermouth in the next 12 days are 1.1m 9s and forecast to arrive on Wednesday (Aug 20) at 9AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 17th Aug)1.5ft (0.5m) 12s
Best Surf 6AM (Wed 20th Aug)3.5ft (1.1m) 9s
Most Powerful 9AM (Wed 20th Aug)3.5ft (1.1m) 9s

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

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

Short Range Forecast Light rain (total 4mm), mostly falling on Sun afternoon. Warm (max 29°C on Sun afternoon, min 25°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 9mm), mostly falling on Wed afternoon. Warm (max 29°C on Thu morning, min 25°C on Wed night). Wind will be generally light.

Sun
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
1
0
0
1
1
0
0
2
0
1
1
0
0
1
0
1
2
0
1
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.6
SE
0.5
SE
0.6
SE
0.6
SE
0.4
SE
0.4
SE
0.4
SE
0.8
SSW
1.1
SSW
1
SSW
1.1
SSW
1.3
SSW
1.1
SSW
0.9
SSW
0.9
SSW
0.9
SSW
0.7
S
1.2
S
1.1
S
1.1
S
1
S
Period(s) (?)1212121212111199988777777766
Wave
Graph
(?)Metric surfscale
Energy (?)1611031101048261701432431831872071671059610575268142132110
Wind
(km/h)
10
SW
5
W
5
SW
10
SW
5
WNW
5
WSW
10
SW
10
W
5
W
10
SW
5
NW
5
W
10
WSW
5
NW
5
WSW
10
SSW
5
NE
5
ESE
10
S
0
ENE
5
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onglassononglassglassoncross-
on		glassonglasscross-
on		oncrossglassonoffglasscross-
on		glassglass
High Tide
/ height (m)
11:23PM
1.51
3:35PM
1.40
1:05AM
1.47
4:37PM
1.53
2:45AM
1.52
5:16PM
1.64
3:54AM
1.62
5:47PM
1.71
4:46AM
1.73
6:15PM
1.76
5:29AM
1.81
6:40PM
1.79
6:09AM
1.85
Low Tide
/ height (m)
5:31PM
1.17
7:30AM
0.46
8:05PM
1.25
9:00AM
0.36
9:47PM
1.17
10:04AM
0.25
10:39PM
1.05
10:52AM
0.15
11:17PM
0.92
11:32AM
0.10
11:50PM
0.80
12:07PM
0.10
12:21AM
0.68
Sun
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunrise--5:26--5:28--5:28--5:28--5:30--5:31--5:31
Sunset6:49--6:46--6:45--6:45--6:44--6:43--6:42--
thunderstorm thunderstorm clearpart cloudthunderstorm part cloudpart cloudthunderstorm clearthunderstorm thunderstorm clearclearclearclearpart cloudclearrain showersthunderstorm part cloudrain showers
Rain (mm)
11--1--1-44------12-1
Temp. °C292629292729282728282629292629292629292728
Feels °C (?)333133333332323231313032323133323133343333
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Eyeball surf reportRecent Eyeball Surf Reports for Shikoku

  1. weather stationWind Update The wind is still cross-on at Yasuda Rivermouth (light winds from the W at Murotomisaki(47899-0) 28 km from Yasuda Rivermouth). 0.6m 9s swell from the ESE with a 0.3m 3s local chop from the SSW and a 0.2m 7s swell from the SSE. 3 swells combining to make bigger set waves.

    1 hour 49 minutes ago Yasuda Rivermouth
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28 km away, 1 h 49 min ago

19 km/h
W
0.0
29.2
Air / Water (°C)
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 Yasuda Rivermouth 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 Yasuda Rivermouth at:
surf-forecast.com

Information about the Yasuda Rivermouth Surf forecast

The above surf forecast table for Yasuda Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Yasuda Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Yasuda Rivermouth 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 (Yasuda Rivermouth) 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 Yasuda Rivermouth 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.

Are you planning a holiday in Shikoku? If you are looking for accommodation near Yasuda Rivermouth, camping, hotels and holiday cottages in Shikoku, consider staying in Aki which is 10 km (6 miles) away. Other places in and around Shikoku where you can find information about places to rent, and car hire include Muroto which is 23 km (14 miles) away, Kochi, Ino and Susaki.

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