Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
The surf forecast for Mainside over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 19) at 12AM. The primary swell is predicted to be 1.0m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mainside in the next 12 days are 2.4m 9s and forecast to arrive on Monday (Dec 22) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 9s period and expected on Saturday (Dec 20) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 19th Dec) | 3.5ft (1.0m) 7s |
| Best Surf | 12AM (Wed 24th Dec) | 3ft (0.9m) 9s |
| Most Powerful | 9AM (Mon 22nd Dec) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Mainside over the next 12 days.
Short Range Forecast Moderate rain (total 11mm), heaviest on Sat morning. Warm (max 22°C on Fri morning, min 19°C on Thu morning). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Sun morning, min 19°C on Sun night). Winds decreasing (strong winds from the NNE on Sun night, light winds from the NE by Tue night). | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map | |||||||||||||||||||||
| Wave Height (m) & direction (?) | N | NNE | N | NNW | N | NNW | NE | E | NE | ENE | ENE | N | N | N | N | N | NNW | E | E | N | N |
| Period(s) (?) | 5 | 6 | 7 | 7 | 6 | 6 | 15 | 7 | 14 | 10 | 9 | 7 | 9 | 9 | 8 | 8 | 7 | 9 | 10 | 6 | 6 |
Wave (?)Graph | |||||||||||||||||||||
| 47 | 40 | 100 | 47 | 22 | 13 | 8 | 159 | 7 | 10 | 8 | 404 | 950 | 686 | 331 | 115 | 69 | 133 | 151 | 117 | 261 | |
Wind (km/h) | NNE | NNE | ENE | ESE | ESE | ESE | SE | SSE | SSE | N | NNE | NNE | NNE | NE | NE | ENE | E | E | NNW | N | N |
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | off | off | off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on | cross |
High Tide / height (m) | 5:45PM 1.71 | 7:26AM 1.58 | 6:16PM 1.74 | 7:56AM 1.62 | 6:48PM 1.77 | 8:27AM 1.66 | 7:21PM 1.80 | 8:59AM 1.68 | 7:58PM 1.81 | 9:32AM 1.69 | 8:39PM 1.80 | 10:08AM 1.69 | 9:23PM 1.75 | ||||||||
Low Tide / height (m) | 12:08PM 0.94 | 12:44AM 0.17 | 12:42PM 0.94 | 1:14AM 0.10 | 1:15PM 0.93 | 1:45AM 0.05 | 1:48PM 0.91 | 2:17AM 0.02 | 2:22PM 0.88 | 2:51AM 0.01 | 3:01PM 0.84 | 3:29AM 0.05 | 3:44PM 0.80 | ||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 7:09 | - | - | 7:11 | - | - | 7:11 | - | - | 7:11 | - | - | 7:11 | - | - | 7:13 | - | - | 7:13 | - | - |
| Sunset | - | 5:38 | - | - | 5:39 | - | - | 5:39 | - | - | 5:40 | - | - | 5:40 | - | - | 5:42 | - | - | 5:42 | - |
Rain (mm) | - | - | - | - | - | 1 | 4 | 4 | 2 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 20 | 20 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 22 | 21 | 19 | 20 | 21 | 22 | 22 | 21 | 21 | 21 | 20 |
| Feels °C (?) | 17 | 16 | 18 | 19 | 19 | 20 | 21 | 21 | 21 | 21 | 18 | 15 | 14 | 16 | 19 | 19 | 20 | 20 | 18 | 16 | 13 |

Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.

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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 Mainside 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.
The above surf forecast table for Mainside provides essential information for determining whether the surfing conditions will be good over the next 12 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.

