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Surf Forecasts:

Monabe Rivermouth surfForecast / Shikoku / Japan

information circle12 Day Weather and Surf, issued 8 pm Monday 16 Feb 2026 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
16.2° C
 (Which is 1.2°C colder than average 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 (Feb 17) at 6AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 0.9m and 7s. Another secondary swell of 0.5m and 12s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Monabe Rivermouth in the next 12 days are 1.6m 6s and forecast to arrive on Tuesday (Feb 17) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Monday (Feb 23) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 17th Feb)5ft (1.5m) 7s
Best Surf 6AM (Tue 17th Feb)5ft (1.5m) 7s
Most Powerful12PM (Tue 17th Feb)5ft (1.6m) 6s

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 Some drizzle, heaviest during Mon night. Very mild (max 14°C on Wed afternoon, min 1°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun afternoon. Very mild (max 15°C on Sun morning, min 5°C on Thu night). Wind will be generally light.

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Mon
23
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
1
0
0
0
0
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 (?)
1.5
ENE
1.3
NE
0.5
E
0.6
E
0.9
E
0.7
E
0.4
E
0.9
NE
0.3
E
0.3
E
0.3
E
0.3
E
0.3
E
0.3
E
0.2
E
0.2
E
0.2
E
0.2
E
0.9
SSW
1.5
SSW
1.3
SSW
Period(s) (?)761111101010611121212121212121212466
Wave
Graph
(?)Metric surfscale
Energy kJ (?)19214162821629233542226252525251111121229134116
Wind
(km/h)
15
N
10
N
10
S
10
NNE
5
NW
25
WNW
20
NNW
10
NNW
10
S
5
N
5
NNW
10
S
10
NNE
0
NE
10
S
10
NNE
10
ESE
15
S
10
S
5
ENE
0
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffonoffcross-
off		cross-
off		offoffonglassglassonoffglassonoffcross-
on		ononcross-
off		glass
High Tide
/ height (m)
6:33AM
1.79
5:55PM
1.85
6:57AM
1.84
6:31PM
1.90
7:20AM
1.87
7:08PM
1.90
7:45AM
1.87
7:47PM
1.85
8:10AM
1.85
8:30PM
1.75
8:37AM
1.81
9:18PM
1.61
9:05AM
1.74
Low Tide
/ height (m)
11:57PM
0.12
12:11PM
0.74
12:28AM
0.10
12:41PM
0.62
12:57AM
0.13
1:12PM
0.52
1:27AM
0.21
1:45PM
0.44
1:58AM
0.34
2:21PM
0.39
2:29AM
0.52
3:01PM
0.38
3:01AM
0.72
3:49PM
0.41
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Mon
23
Sunrise-6:47--6:46--6:45--6:43--6:43--6:41--6:41-
Sunset--5:50--5:51--5:52--5:52--5:52--5:53--5:54
light rain
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
cloud
rain showers
light rain
heavy rain
heavy rain
Rain (mm)
1----------------251111
Temp. °C101010712147886101181213121515151414
Feels °C (?)665487043267591091111131415
  • 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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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:
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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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