Mainside Surf Break

Lat Long: 26.44° N 127.71° E

Mainside Surf Forecast and Surf Report

Issued: 8 am 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Mainside sea temperature is
28.7°C
0.1° 

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


Mainside surf forecast from 28 Aug 2026:

  • Most powerful swell: Monday 31 Aug, 9AM (local time) - 10ft (3.0m), 10s period, ENE swell with 1,597 kJ wave energy.

Best Forecast Surf Conditions for Mainside this week:

The most powerful waves expected at Mainside in the next 16 days are 3.0m 10s and forecast to arrive on Monday (Aug 31) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 9s period and expected on Tuesday (Sep 01) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 9AM (Mon 31st Aug)10ft (3.0m) 10s

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


Short Range Forecast

Light rain (total 6mm), mostly falling on Sun night. Warm (max 29°C on Fri afternoon, min 27°C on Sat night). Mainly strong winds.

Days 4-6 Weather Summary

Heavy rain (total 24mm), heaviest during Mon afternoon. Warm (max 28°C on Mon morning, min 27°C on Mon morning). Mainly strong winds.

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
0
0
0
1
2
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
WNW
10
1
W
9
0.4
W
10
0.5
W
8
0.4
W
8
0.3
ENE
12
1.2
E
8
0.2
ENE
12
1.4
ESE
10
3
ENE
10
2.5
E
10
0.5
NNE
7
0.3
NNE
6
0.3
NNE
6
0.9
ENE
10
0.9
E
10
1
E
10
1
E
10
1.5
WNW
11
1.3
E
11
1.5
WNW
8
Wave Graph
Metric surfscale
Energy kJ
402
164
33
33
18
30
159
14
0
1597
1306
25
8
8
163
151
179
204
511
375
298
Wind (km/h)
30
ESE
35
ESE
35
ESE
30
ESE
30
ESE
30
E
30
ENE
35
NE
40
NE
45
ENE
35
E
40
ESE
35
SE
35
SSE
35
SSW
35
WSW
35
WSW
30
W
25
W
20
WNW
15
NW
Wind State
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross
cross-on
cross-on
cross-on
on
on
cross-on
High Tide
7:50PM2.07m
7:38AM2.16m
8:14PM2.11m
8:14AM2.20m
8:39PM2.14m
8:52AM2.18m
9:06PM2.15m
9:32AM2.11m
9:36PM2.12m
10:17AM1.97m
10:08PM2.07m
11:11AM1.79m
10:46PM1.98m
Low Tide
1:32PM0.34m
1:43AM0.70m
2:01PM0.34m
2:13AM0.58m
2:31PM0.39m
2:45AM0.47m
3:01PM0.49m
3:20AM0.42m
3:33PM0.63m
4:00AM0.41m
4:07PM0.80m
4:48AM0.46m
4:45PM1.00m
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:07
6:07
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:52
6:52
6:51
6:49
6:47
6:46
 mm
1
5
3
6
8
2
1
1
2
1
Temp °C
28
29
28
29
29
27
29
28
28
28
28
28
28
28
28
28
28
27
28
28
27
Feels °C
29
29
28
30
30
27
28
27
27
26
28
27
28
28
28
28
27
27
29
30
29
  • 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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