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Surf Forecasts:

Monabe Rivermouth surfForecast / Shikoku / Japan

information circle12 Day Weather and Surf, issued 8 pm Thursday 20 Nov 2025 JST
Forecast update in hr  min  s Forecast update imminent
Monabe Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Monabe Rivermouth sea temperature is
23.8° C
 (Which is 1.8°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Monabe Rivermouth this week:

The surf forecast for Monabe Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Nov 25) at 6AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.1m and 18s. Another secondary swell of 0.9m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Monabe Rivermouth in the next 12 days are 1.1m 9s and forecast to arrive on Tuesday (Nov 25) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 6s period and expected on Tuesday (Nov 25) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 25th Nov)3.5ft (1.1m) 9s
Best Surf 6AM (Tue 25th Nov)3.5ft (1.1m) 9s
Most Powerful 6AM (Tue 25th Nov)3.5ft (1.1m) 9s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Very mild (max 18°C on Fri afternoon, min 9°C on Thu night). Wind will be generally light.

Days 3-6 Weather Summary Some drizzle, heaviest during Tue morning. Very mild (max 17°C on Mon morning, min 5°C on Tue night). Winds increasing (calm on Mon morning, fresh winds from the W by Tue afternoon).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thu
27
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
ESE
0.4
ESE
0.4
ESE
0.4
ESE
0.4
SE
0.4
ESE
0.4
ESE
0.5
ESE
0.5
E
0.6
ESE
0.7
E
0.7
E
1
ESE
1.7
WSW
0.9
ESE
0.7
ESE
0.6
ESE
0.6
ESE
0.6
ESE
0.6
ESE
0.6
ESE
Period(s) (?)89999101110109999699101091010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)283132322136445849687978185188116757174696063
Wind
(km/h)
10
N
5
NW
15
W
15
N
10
NNW
5
S
10
N
5
N
5
WSW
10
NNE
5
NNE
5
S
10
NNE
5
WNW
30
W
15
NW
15
NW
20
NNW
15
N
5
N
5
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offglasscrossoffoffonoffglassglassoffglassglassoffcross-
off		cross-
off		cross-
off		cross-
off		offoffoffglass
High Tide
/ height (m)
6:42AM
1.73
5:44PM
1.72
7:16AM
1.70
6:12PM
1.71
7:52AM
1.65
6:42PM
1.69
8:31AM
1.59
7:14PM
1.64
9:14AM
1.53
7:51PM
1.57
10:04AM
1.49
8:38PM
1.49
11:03AM
1.48
Low Tide
/ height (m)
11:58PM
0.16
12:13PM
0.89
12:29AM
0.15
12:42PM
0.93
1:02AM
0.18
1:13PM
0.97
1:37AM
0.23
1:46PM
1.02
2:15AM
0.31
2:26PM
1.05
2:58AM
0.39
3:19PM
1.08
3:48AM
0.48
4:34PM
1.08
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thu
27
Sunrise-6:41--6:41--6:41--6:43--6:43--6:45--6:46-
Sunset--4:59--4:59--4:58--4:58--4:58--4:57--4:57
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
rain showers
part cloud
clear
clear
clear
clear
clear
clear
Rain (mm)
-------------1-------
Temp. °C11161812161512161713171714171510131491414
Feels °C (?)9131481413915161115161311869951112
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Monabe 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 Monabe Rivermouth at:
surf-forecast.com

Information about the Monabe Rivermouth Surf forecast

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

Monabe Rivermouth is 11 km (7 miles) from the city of Aki. If you plan a holiday in Shikoku, look for hotels and other accommodation in Aki. Aki has rooms for a wide range of budgets as well as car hire and transport links.

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