Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
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Aoshima Harbour surfForecast / Kyu Shu / Japan
12 Day Weather and Surf, issued 2 pm Friday 12 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Aoshima Harbour surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Aoshima Harbour sea temperature is
21.4° C
(Which is slightly cooler than normal)Best Forecast Surf Conditions for Aoshima Harbour this week:
The surf forecast for Aoshima Harbour over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Dec 13) at 9PM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 0.5m and 10s. Another secondary swell of 0.4m and 12s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Aoshima Harbour in the next 12 days are 1.7m 9s and forecast to arrive on Saturday (Dec 13) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Dec 14) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 13th Dec) | 4.5ft (1.4m) 6s |
| Best Surf | 12AM (Sun 14th Dec) | 6ft (1.8m) 6s |
| Most Powerful | 6AM (Sat 13th Dec) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Aoshima Harbour over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 21mm), heaviest during Sat night. Very mild (max 16°C on Sat night, min 8°C on Sun night). Winds decreasing (fresh winds from the NNE on Fri night, calm by Sat night). | Days 3-6 Weather Summary Some drizzle, heaviest during Wed night. Very mild (max 17°C on Wed afternoon, min 8°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||
Fri 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 6 | 7 | 8 | 6 | 6 | 8 | 12 | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 7 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 141 | 374 | 404 | 148 | 263 | 257 | 93 | 59 | 100 | 110 | 78 | 74 | 72 | 49 | 65 | 65 | 44 | 37 | 41 | 45 | 107 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- off | glass | cross- on | cross- off | glass | cross- off | cross- off | cross- on | cross- on | cross- on | cross- on | ||
High Tide / height (m) | 11:33PM 1.43 | 12:39PM 1.68 | 1:11AM 1.42 | 1:28PM 1.70 | 2:39AM 1.49 | 2:15PM 1.73 | 3:48AM 1.59 | 2:58PM 1.77 | 4:45AM 1.70 | 3:40PM 1.82 | 5:33AM 1.79 | 4:19PM 1.87 | 6:16AM 1.85 | ||||||||||
Low Tide / height (m) | 6:02PM 0.92 | 5:51AM 0.67 | 7:14PM 0.77 | 7:01AM 0.80 | 8:16PM 0.59 | 8:09AM 0.89 | 9:09PM 0.40 | 9:11AM 0.95 | 9:55PM 0.22 | 10:05AM 0.99 | 10:38PM 0.07 | 10:52AM 1.01 | 11:19PM -0.05 | 11:35AM 1.02 | |||||||||
Fri 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||
| Sunrise | - | - | 7:03 | - | - | 7:05 | - | - | 7:05 | - | - | 7:05 | - | - | 7:07 | - | - | 7:07 | - | - | 7:07 | ||
| Sunset | 5:09 | - | - | 5:09 | - | - | 5:10 | - | - | 5:10 | - | - | 5:10 | - | - | 5:12 | - | - | 5:12 | - | - | ||
 |  |  | |  | |  |  | | | | | | | | | | | | | | |||
Rain (mm) | - | - | 1 | 3 | 17 | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | ||
| Temp. °C | 13 | 11 | 13 | 15 | 16 | 12 | 12 | 9 | 11 | 13 | 11 | 12 | 13 | 11 | 14 | 17 | 14 | 15 | 15 | 14 | 16 | ||
| Feels °C (?) | 6 | 3 | 9 | 12 | 15 | 5 | 5 | 5 | 7 | 10 | 8 | 10 | 10 | 8 | 11 | 14 | 13 | 11 | 11 | 9 | 12 | ||
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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 Aoshima Harbour 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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Information about the Aoshima Harbour Surf forecast
The above surf forecast table for Aoshima Harbour provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Aoshima Harbour can be found by selecting the local surf guide option on the grey menu. Our Aoshima Harbour 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 (Aoshima Harbour) 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 Aoshima Harbour 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.
Aoshima Harbour is 15 km (9 miles) from Miyazaki-shi. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Miyazaki-shi. Miyazaki-shi has rooms for a wide range of budgets as well as car hire and transport links.
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