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Mainside surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 pm Sunday 17 Aug 2025 JST
How big are the waves at Mainside today?
The current surf forecast for Mainside at 11PM is: 0.2m 9s primary swell from a East direction (forecast issued at 08:00pm August 17). An open ocean swell of 0.1m 12s is not directed at the surf break, a second open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Aug) | - | - |
| Afternoon (17 Aug) | - | - |
| Evening (17 Aug) | 0.5ft (0.1m) | 16s |
Table - waves today at Mainside. (Swell directed towards the surf break)
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||||||||||
| 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 16 | 9 | 9 | 9 | 6 | 9 | 9 | 9 | 8 | 9 | 6 | 7 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 |
Wave (?)Graph  | ||||||||||||||||||||||||
| Energy (?) | 2 | 5 | 7 | 6 | 6 | 16 | 25 | 6 | 14 | 0 | 6 | 64 | 61 | 7 | 37 | 53 | 36 | 17 | 11 | 10 | 6 | 4 | 5 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | cross- off | cross- off | cross- off | off | off | off | off | cross- off | cross- off | cross- on | on | cross- on | cross- on | cross- on | cross | cross | cross | cross | cross | cross- on | cross- on |
High Tide / height (m) | 1:08AM 1.81 | 4:27PM 1.60 | 2:48AM 1.77 | 5:44PM 1.73 | 4:21AM 1.84 | |||||||||||||||||||
Low Tide / height (m) | 7:05PM 1.28 | 8:54AM 0.63 | 9:09PM 1.36 | 10:26AM 0.54 | 10:55PM 1.30 | 11:33AM 0.41 | ||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:01 | - | - | - | - | - | - | - | 6:01 | - | - | - | - | - | - | - | 6:03 | - | - |
| Sunset | 7:04 | - | - | - | - | - | - | - | 7:02 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - |
 |  |  | | | | |  | |  | | |  | | | |  | | | | | | | | |
Rain (mm) | 4 | 1 | - | - | 1 | 1 | 1 | - | 2 | - | - | 2 | - | 1 | 2 | 2 | - | - | - | - | 2 | 2 | - | - |
| Temp. °C | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 29 | 28 | 27 | 27 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 |
| Feels °C (?) | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 28 | 27 | 29 | 27 | 27 | 28 | 30 | 30 | 31 | 31 | 31 | 30 | 29 | 29 | 31 | 31 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Okinawa
The wind is still offshore at Mainside (light winds from the E at Kadena Air Force Base Airport 11 km from Mainside). No surfable waves
2 h 22 min ago
FREE! Surf-Forecast.com widget for your website
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.
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