
Surf Forecasts:
Mainside surf forecast from 8 Oct 2026:
- Best quality surf: Sunday 11 Oct, 3PM (local time) - 3.5ft (1.0m), 13s period, E swell with offshore winds.
- Most powerful swell: Sunday 11 Oct, 3PM (local time) - 3.5ft (1.0m), 13s period, E swell with 350 kJ wave energy.
- Next surfable swell (1★+): Saturday 10 Oct, 3AM (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 3AM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.6m and 10s. Another secondary swell of 0.5m and 4s is also forecast. 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 1.0m 13s and forecast to arrive on Sunday (Oct 11) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Friday (Oct 09) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 10th Oct) | 1.5ft (0.5m) 16s |
| Best Surf | 3PM (Sun 11th Oct) | 3.5ft (1.0m) 13s |
| Most Powerful | 3PM (Sun 11th Oct) | 3.5ft (1.0m) 13s |
Table - best surf conditions forecast for Mainside over the next 16 days.
Short Range ForecastHeavy rain (total 33mm), heaviest during Sun morning. Warm (max 28°C on Sat afternoon, min 25°C on Thu night). Winds decreasing (fresh winds from the NE on Thu night, calm by Sat morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Wed afternoon. Warm (max 28°C on Mon afternoon, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 9 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 10 | ENE 11 | E 18 | E 16 | E 17 | E 16 | E 15 | E 14 | E 13 | E 12 | E 12 | E 15 | E 14 | E 14 | E 13 | E 12 | E 11 | E 11 | E 10 |
Wave Graph | |||||||||||||||||||
276 | 42 | 54 | 85 | 207 | 178 | 104 | 146 | 350 | 236 | 228 | 163 | 264 | 179 | 166 | 134 | 82 | 81 | 59 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross | cross-on | cross |
High Tide | 6:17AM2.03m | 6:34PM2.03m | 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 | |||||||
Low Tide | 00:12AM0.56m | 12:30PM0.48m | 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 | |||||||
— | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
6:08 | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:02 | — | |
mm | — | — | — | 1 | 2 | 2 | 10 | 12 | 6 | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 25 | 27 | 27 | 26 | 27 | 28 | 27 | 26 | 26 | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 23 | 25 | 26 | 26 | 31 | 31 | 29 | 27 | 27 | 27 | 29 | 29 | 26 | 29 | 29 | 28 | 28 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | N 6 | ENE 11 | ENE 11 | E 7 | E 17 | E 16 | E 15 | E 14 | E 13 | E 12 | E 12 | E 11 | E 14 | E 14 | E 13 | E 12 | E 11 | E 11 | E 10 |
36 | 42 | 23 | 52 | 207 | 178 | 104 | 146 | 130 | 236 | 228 | 163 | 264 | 179 | 166 | 134 | 82 | 81 | 52 | |
Swell 2 Height (m) Direction Period (s) | ENE 12 | E 18 | E 9 | E 16 | E 9 | E 9 | N 5 | N 5 | E 13 | NW 6 | ESE 16 | E 15 | ENE 13 | E 12 | E 11 | ENE 10 | ENE 11 | NE 10 | NE 10 |
46 | 25 | 15 | 85 | 41 | 36 | 4 | 2 | 350 | 1 | 85 | 159 | 129 | 137 | 85 | 11 | 11 | 4 | 4 | |
Swell 3 Height (m) Direction Period (s) | E 20 | SE 9 | E 18 | ESE 11 | NNE 5 | N 5 | SE 10 | S 7 | ESE 10 | E 16 | NW 6 | NNW 5 | NNW 6 | NNW 5 | NW 5 | NW 4 | NW 4 | S 7 | S 7 |
7 | 3 | 54 | 12 | 9 | 8 | 4 | 1 | 10 | 5 | 1 | 2 | 7 | 3 | 1 | 1 | 1 | 1 | 1 | |
Wind waves Height (m) Direction Period (s) | ENE 10 | ENE 6 | NE 5 | NNE 4 | — | — | E 8 | ESE 8 | E 8 | E 4 | — | — | — | — | — | — | — | NNW 3 | N 5 |
276 | 84 | 55 | 18 | — | — | 90 | 120 | 111 | 6 | — | — | — | — | — | — | — | 7 | 59 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 10 | 13 | 10 | 10 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Live Wave Height (m)
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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.










