Surf Forecasts:
Mainside surf forecast from 2 Jul 2026:
- Most powerful swell: Sunday 5 Jul, 3PM (local time) - 1.5ft (0.5m), 6s period, W swell with 18 kJ wave energy.
Best Forecast Surf Conditions for Mainside this week:
The most powerful waves expected at Mainside in the next 16 days are 0.5m 6s and forecast to arrive on Sunday (Jul 05) 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 8.0m 17s period and expected on Friday (Jul 10) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Sun 5th Jul) | 1.5ft (0.5m) 6s |
Table - best surf conditions forecast for Mainside over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, Rusty here – let’s call it like it is. Mainside is looking at a flat spell for the next two weeks. The first surfable bump isn’t until Sunday the 12th of July, and even that is tiny. From now until the 11th, it’s all zeros and “poor surf conditions.” The water is sitting at about 80°, which is a touch cooler than normal for this time of year – about 3° below average – so don’t expect bathwater.
Mainside is a consistent reef break that needs swell from the north to get good, so this stretch of flatness isn’t that unusual. It won’t stay this way forever. The one little pulse shows up on the morning of Sunday the 12th: a 2ft west swell with a 10-second period. The combined wave energy is 79 (moderate) but still labelled poor surf conditions. Winds are light and cross-offshore from the SSE, so it’ll look clean, but you’ll be groveling on tiny bumps.
After that, the rest of the week offers scraps – 0.6ft to 1ft east swells with short to medium periods. The wind stays clean more often than not, but the wave energy is weak, all in the single or low double digits. Nothing builds into a proper ride.
There’s no standout day. If you’re determined, that Sunday morning the 12th is your best bet for a clean, knee-high wave. Experts only, and honestly, it’s barely worth the wetsuit.
– Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 26°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 3 | Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | |||||||||||||||
AM | PM | 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) | ESE 9 | W 4 | ESE 8 | WSW 4 | WSW 4 | W 6 | W 6 | W 6 | ESE 9 | W 6 | ESE 15 | ESE 13 | ESE 15 | ESE 18 | E 18 | SE 18 | SE 18 | SE 18 | SE 18 | SE 17 | SE 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 2 | 0 | 7 | 8 | 3 | 11 | 18 | 0 | 10 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | cross | glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 9:47PM1.92m | 9:07AM1.97m | 10:20PM1.92m | 9:53AM1.91m | 10:56PM1.91m | 10:45AM1.83m | 11:37PM1.88m | 11:48AM1.72m | 00:24AM1.86m | 1:09PM1.62m | 1:19AM1.84m | 2:50PM1.59m | 2:25AM1.85m | ||||||||
Low Tide | 3:12PM0.27m | 3:26AM0.95m | 3:47PM0.34m | 4:08AM0.90m | 4:26PM0.44m | 4:56AM0.85m | 5:09PM0.59m | 5:52AM0.81m | 5:59PM0.76m | 6:59AM0.76m | 6:58PM0.94m | 8:16AM0.67m | 8:13PM1.08m | ||||||||
 | |  | | | | | | | |  | | | | | | |  | |  | | |
 | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — |
 | — | 7:25 | — | — | 7:25 | — | — | 7:25 | — | — | 7:25 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 27 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 29 |
Feels °C | 30 | 31 | 32 | 29 | 29 | 31 | 31 | 31 | 31 | 32 | 31 | 31 | 32 | 32 | 32 | 30 | 29 | 28 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 8 | WSW 5 | W 6 | W 6 | WSW 6 | W 6 | WSW 6 | ESE 13 | ESE 15 | ESE 18 | ESE 18 | SE 18 | SE 18 | SE 18 | SE 18 | SE 17 | SE 18 |
| kJ | 25 | 25 | 24 | 15 | 14 | 8 | 11 | 18 | 10 | 10 | 10 | 102 | 417 | 975 | 2009 | 3786 | 4495 | 6083 | 8655 | 5273 | 14972 |
Swell 2 Height (m) Direction Period (s) | WSW 5 | W 4 | WSW 4 | S 7 | S 7 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SW 9 | ESE 15 | WSW 6 | WSW 5 | WSW 5 | WSW 8 | — | — | — | — | SSE 18 | — |
| kJ | 5 | 2 | 3 | 4 | 1 | 15 | 15 | 16 | 15 | 12 | 42 | 12 | 9 | 9 | 26 | — | — | — | — | 2700 | — |
Swell 3 Height (m) Direction Period (s) | S 6 | SW 4 | S 6 | SW 8 | SW 8 | W 6 | SW 9 | SW 9 | SW 9 | ESE 8 | SW 9 | ESE 8 | SW 9 | SW 9 | E 18 | — | — | — | — | — | — |
| kJ | 3 | 1 | 1 | 3 | 2 | 3 | 3 | 3 | 13 | 14 | 12 | 14 | 12 | 12 | 6 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSW 2 | — | WSW 4 | WSW 4 | — | — | — | — | — | — | — | — | — | — | — | — | ENE 4 | — | ENE 5 | — |
| kJ | — | 1 | — | 7 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | 26 | — | 91 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 66 | 73 | 73 | 73 | 678 | 699 | 995 | 830 | 29 | 27 | 29 | 29 | 27 | 10 | 10 | 10 | 10 | 650 | 865 | 608 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
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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