Mainside Surf Break

Lat Long: 26.44° N 127.71° E

Mainside Surf Forecast and Surf Report

Issued: 8 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Mainside sea temperature is
28.5°C
0.2° 

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


Mainside surf forecast from 25 Aug 2026:

  • Best quality surf: Saturday 29 Aug, 12AM (local time) - 2ft (0.6m), 10s period, W swell with offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 11ft (3.5m), 16s period, E swell with 6,016 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 12AM (local time) - 2ft (0.6m), 10s period with W 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 (Aug 29) at 12AM. The primary swell is predicted to be 0.6m and 10s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Mainside in the next 16 days are 3.5m 16s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 10s period and expected on Thursday (Aug 27) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 29th Aug)2ft (0.6m) 10s
Best Surf12AM (Sat 29th Aug)2ft (0.6m) 10s
Most Powerful 3PM (Tue 25th Aug)11ft (3.5m) 16s

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


Short Range Forecast

Heavy rain (total 30mm), heaviest during Tue night. Warm (max 29°C on Tue morning, min 27°C on Tue night). Winds decreasing (gales from the WNW on Tue night, moderate winds from the SSE by Thu afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 29°C on Fri morning, min 27°C on Sat night). Mainly fresh winds.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
1
0
2
2
0
1
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)
3.5
ESE
17
3.5
E
16
3.5
NNW
9
3
NNW
10
2.5
NW
9
3
WNW
10
2.5
W
10
0.3
E
13
2.5
W
11
1.6
W
11
1.1
W
10
0.6
W
10
0.2
ENE
13
0.3
E
13
0.3
ENE
12
0.3
ENE
12
0.2
ENE
12
0.2
ENE
11
0.5
SW
10
0.9
ESE
10
0.1
E
11
Wave Graph
Metric surfscale
Energy kJ
0
6016
2356
1820
1099
1691
1258
28
1512
584
270
68
17
30
30
28
14
13
0
0
2
Wind (km/h)
35
N
45
N
65
WNW
55
SW
50
SW
45
SSW
40
S
30
S
35
SE
30
SE
40
ESE
25
ESE
25
ESE
25
ESE
25
E
25
ENE
25
ENE
25
NE
35
NE
40
NE
40
NE
Wind State
cross
cross-on
on
cross-on
cross
cross
cross-off
cross-off
cross-off
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
6:47PM1.83m
5:50AM1.85m
7:07PM1.92m
6:28AM1.97m
7:28PM2.00m
7:03AM2.08m
7:50PM2.07m
7:38AM2.16m
8:14PM2.11m
8:14AM2.20m
8:39PM2.14m
8:52AM2.18m
9:06PM2.15m
Low Tide
12:00PM0.54m
00:24AM1.12m
12:33PM0.45m
00:51AM0.99m
1:03PM0.38m
1:16AM0.84m
1:32PM0.34m
1:43AM0.70m
2:01PM0.34m
2:13AM0.58m
2:31PM0.39m
2:45AM0.47m
3:01PM0.49m
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
cloud
thunderstorm
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:05
6:05
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:55
6:54
6:53
6:52
6:52
6:51
 mm
6
13
5
4
2
Temp °C
29
29
28
28
29
28
29
29
28
29
29
28
29
29
28
29
29
27
28
28
28
Feels °C
28
26
22
24
27
26
28
29
29
29
29
29
30
30
30
30
29
27
27
26
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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