Kaifu Rivermouth surfForecast / Shikoku / Japan

information circle12 Day Weather and Surf, issued 8 am Monday 15 Dec 2025 JST
Forecast update in hr  min  s Forecast update imminent
Kaifu Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kaifu Rivermouth sea temperature is
20.7° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Kaifu Rivermouth this week:

The surf forecast for Kaifu Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 19) at 6PM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.6m and 6s. Another secondary swell of 0.4m and 10s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kaifu Rivermouth in the next 12 days are 1.7m 9s and forecast to arrive on Sunday (Dec 21) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Monday (Dec 22) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Fri 19th Dec)3.5ft (1.1m) 6s
Best Surf 6PM (Sun 21st Dec)5.5ft (1.7m) 9s
Most Powerful 9PM (Sun 21st Dec)5.5ft (1.7m) 9s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 14°C on Wed morning, min 6°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Fri night. Warm (max 20°C on Sat afternoon, min 9°C on Thu night). Wind will be generally light.

Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Swell
Height Map
Wave Height (m) & direction (?)
0.7
ESE
0.6
ESE
0.5
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.3
SE
0.3
ESE
0.3
ESE
0.3
ESE
0.3
ESE
0.4
SE
0.9
ESE
0.4
SE
0.4
ESE
0.9
SSE
1
SE
1.4
SE
1.7
SE
Period(s) (?)109999888810101010106997899
Wave
Graph
(?)Metric surfscale
Energy kJ (?)805941281917161611191818192453193276132268457
Wind
(km/h)
10
NW
0
ESE
10
NNW
5
N
5
ESE
5
NW
5
NW
5
SSE
10
NNE
10
N
10
ENE
5
NW
5
NNE
5
ESE
15
SSE
5
WSW
10
SSW
5
WNW
5
NW
10
NE
20
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offglassoffglassonoffglassoncross-
off
cross-
off
cross-
on
offcross-
off
cross-
on
oncross-
off
crossoffglasscrosscross-
off
High Tide
/ height (m)
2:20PM
1.53
4:07AM
1.42
2:59PM
1.55
4:52AM
1.51
3:37PM
1.59
5:31AM
1.58
4:14PM
1.62
6:07AM
1.63
4:50PM
1.66
6:41AM
1.66
5:25PM
1.70
7:15AM
1.67
6:00PM
1.72
Low Tide
/ height (m)
9:21PM
0.52
9:20AM
1.01
10:00PM
0.40
10:08AM
1.02
10:36PM
0.30
10:49AM
1.01
11:11PM
0.22
11:26AM
1.00
11:46PM
0.16
12:00PM
0.99
12:21AM
0.13
12:33PM
0.98
12:55AM
0.12
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Sunrise6:58--6:58--7:00--7:00--7:01--7:01--7:01--
Sunset-4:54--4:54--4:55--4:55--4:57--4:57--4:57-
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
rain showers
cloud
cloud
cloud
part cloud
part cloud
part cloud
Rain (mm)
--------------10------
Temp. °C1111712128141411141410161616192017191915
Feels °C (?)88410961211911118141515192017191912
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Kaifu Rivermouth Surf forecast

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

Kaifu Rivermouth is 40 km (25 miles) from Muroto. If you plan a holiday in Shikoku, look for hotels and other accommodation in Muroto. Muroto has rooms for a wide range of budgets as well as car hire and transport links.

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