Surf Break

Lat Long: 26.44° N 127.71° E

Mainside Surf Forecast and Surf Report

Issued: 8 pm 09 Oct 2026 (local time)

Forecast update in  hr  min

Today's Mainside sea temperature is
28.2°C
1.0° 

Mainside surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Mainside surf forecast from 9 Oct 2026:

  • Best quality surf: Monday 12 Oct, 3AM (local time) - 3ft (0.9m), 12s period, E swell with offshore winds.
  • Most powerful swell: Thursday 15 Oct, 12PM (local time) - 3.5ft (1.1m), 10s period, ENE swell with 231 kJ wave energy.
  • Next surfable swell (1★+): Saturday 10 Oct, 9PM (local time) - 1.5ft (0.5m), 16s period with E swell.

Best Forecast Surf Conditions for Mainside this week:

The surf forecast for Mainside over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Oct 10) at 9PM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.5m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Mainside in the next 16 days are 1.1m 10s and forecast to arrive on Thursday (Oct 15) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 15s period and expected on Monday (Oct 12) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 10th Oct)1.5ft (0.5m) 16s
Best Surf 3AM (Mon 12th Oct)3ft (0.9m) 12s
Most Powerful12PM (Thu 15th Oct)3.5ft (1.1m) 10s

Table - best surf conditions forecast for Mainside over the next 16 days.


Short Range Forecast

Moderate rain (total 19mm), heaviest on Sat night. Warm (max 28°C on Sun afternoon, min 26°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Tue night. Warm (max 27°C on Tue morning, min 23°C on Thu morning). Winds increasing (calm on Tue morning, fresh winds from the NNE by Wed afternoon).

Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
1
1
1
1
1
2
2
2
2
0
0
0
1
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
E
16
0.6
E
17
0.6
E
16
0.5
E
15
0.5
E
14
0.6
E
13
0.7
E
12
0.8
E
12
0.6
E
15
0.7
E
14
0.7
E
13
0.7
E
13
0.6
E
12
1.2
NNW
6
1.5
NNW
7
1.4
N
7
1.3
N
8
1.1
N
8
1
ENE
9
Wave Graph
Metric surfscale
Energy kJ
85
207
178
104
100
126
141
174
159
187
171
161
97
103
195
203
201
149
164
Wind (km/h)
20
NNE
15
NNE
15
N
10
E
5
SE
0
E
15
SE
15
ESE
10
E
15
E
10
E
5
NNW
15
NNW
20
N
30
NNE
20
NE
25
NNE
20
NNE
10
E
Wind State
cross
cross
cross
cross-off
cross-off
glassy
off
off
off
off
cross-off
glassy
cross-on
cross
cross
cross-off
cross
cross
cross-off
High Tide
6:56AM2.08m
7:00PM2.08m
7:33AM2.08m
7:25PM2.11m
8:06AM2.03m
7:49PM2.11m
8:39AM1.96m
8:13PM2.08m
9:11AM1.86m
8:37PM2.03m
9:45AM1.75m
9:02PM1.95m
Low Tide
00:46AM0.40m
1:02PM0.52m
1:19AM0.29m
1:31PM0.59m
1:50AM0.23m
1:57PM0.67m
2:20AM0.21m
2:22PM0.76m
2:50AM0.25m
2:46PM0.86m
3:20AM0.31m
3:11PM0.96m
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
clear
clear
clear
rain showers
clear
clear
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
6:24
—
—
6:24
—
—
6:26
—
—
6:26
—
—
6:26
—
—
6:26
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
—
6:07
—
—
6:06
—
—
6:04
—
—
6:02
—
—
6:02
—
—
6:01
—
 mm
—
1
1
4
2
3
8
—
—
—
—
—
1
—
—
—
—
—
—
Temp °C
26
26
27
26
27
28
26
27
27
26
27
27
26
26
26
25
24
24
25
Feels °C
26
28
29
29
31
33
29
29
29
26
31
30
28
26
24
23
23
23
27
  • 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
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Information about the Mainside Surf forecast

The above surf forecast table for Mainside provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mainside can be found by selecting the local surf guide option on the grey menu. Our Mainside 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 (Mainside) 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 Mainside 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.

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

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