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Keta Reef Oshima Surf Forecast
/ Izu Islands (6 surf breaks) /
Keta Reef Oshima surfForecast / Izu Islands / Japan
12 Day Weather and Surf, issued 8 pm Monday 16 Jun 2025 JST
Best Forecast Surf Conditions for Keta Reef Oshima this week:
The surf forecast for Keta Reef Oshima over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jun 18) at 9AM. The primary swell is predicted to be 3ft and 7s period with a secondary swell of 1ft and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Keta Reef Oshima in the next 12 days are 5ft 8s and forecast to arrive on Tuesday (Jun 17) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1ft 3s period and expected on Wednesday (Jun 18) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 18th Jun) | 3ft (0.9m) 7s |
| Best Surf | 9AM (Wed 18th Jun) | 3ft (0.9m) 7s |
| Most Powerful | 3AM (Tue 17th Jun) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Keta Reef Oshima over the next 12 days.
Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Sat 28 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (ft) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 7 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 11 | 7 | 7 | 10 | 10 | 10 | 10 | 10 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 9 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 245 | 268 | 204 | 353 | 89 | 67 | 41 | 33 | 28 | 21 | 26 | 20 | 13 | 12 | 24 | 36 | 46 | 95 | 111 | 84 | 74 | 62 | 61 | 72 | 63 | 109 | 146 | 89 | 142 | 313 | 361 | 118 | 73 | 92 | 57 | 57 |
Wind (mph) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | off | off | off | cross- off | cross- off | cross- off | cross | cross- off | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | glass | cross- off | glass | glass | cross- on | cross- on | cross- off | glass | glass | cross- off | cross- off | cross | glass | cross |
High Tide / height (ft) | 9:13PM 4.2 | 7:29AM 4.17 | 9:50PM 4.13 | 8:37AM 3.87 | 10:28PM 4.13 | 10:09AM 3.58 | 11:08PM 4.17 | 12:04PM 3.54 | 11:51PM 4.27 | 1:52PM 3.74 | 12:37AM 4.36 | 3:15PM 4.07 | 1:25AM 4.53 | 4:19PM 4.4 | 2:14AM 4.66 | 5:13PM 4.59 | 3:03AM 4.82 | 5:59PM 4.69 | 3:51AM 4.92 | 6:41PM 4.69 | 4:38AM 4.92 | 7:18PM 4.59 | 5:23AM 4.86 | |||||||||||||
Low Tide / height (ft) | 2:23AM 2.92 | 2:42PM 0.82 | 3:25AM 2.69 | 3:30PM 1.28 | 4:39AM 2.33 | 4:24PM 1.84 | 5:55AM 1.84 | 5:29PM 2.4 | 7:03AM 1.28 | 6:45PM 2.85 | 8:01AM 0.69 | 8:02PM 3.18 | 8:54AM 0.2 | 9:08PM 3.35 | 9:43AM -0.16 | 10:02PM 3.45 | 10:30AM -0.39 | 10:49PM 3.41 | 11:16AM -0.43 | 11:31PM 3.31 | 12:00PM -0.3 | 12:12AM 3.18 | 12:42PM -0.03 | |||||||||||||
Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Sat 28 | |||||||||||||||||||||||||
| Sunrise | - | 4:28 | - | - | 4:28 | - | - | 4:28 | - | - | 4:28 | - | - | 4:28 | - | - | 4:28 | - | - | 4:28 | - | - | 4:30 | - | - | 4:30 | - | - | 4:30 | - | - | 4:31 | - | - | 4:31 | - |
| Sunset | - | - | 6:57 | - | - | 6:58 | - | - | 6:58 | - | - | 6:58 | - | - | 6:58 | - | - | 6:59 | - | - | 6:59 | - | - | 6:59 | - | - | 6:59 | - | - | 6:59 | - | - | 6:59 | - | - | 6:59 |
 |  | |  | | | |  | | | | | | | | | | | | | | | |  |  | |  | |  | | | | | | | | |
Rain (in) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.0 | 0.0 | 0.0 | 0.1 | - | - | - | - | - | - | - | - | - |
| Temp. °F | 75 | 79 | 79 | 77 | 77 | 77 | 75 | 75 | 75 | 73 | 73 | 75 | 73 | 73 | 75 | 73 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 72 | 73 | 73 | 77 | 75 | 75 | 77 | 77 | 77 | 77 | 77 | 77 | 81 |
| Feels °F (?) | 70 | 75 | 75 | 79 | 81 | 81 | 82 | 81 | 81 | 79 | 79 | 81 | 77 | 79 | 77 | 72 | 70 | 68 | 68 | 70 | 70 | 72 | 81 | 73 | 81 | 81 | 81 | 75 | 82 | 84 | 84 | 81 | 81 | 81 | 86 | 88 |
Short Range Forecast: Mostly dry. Warm (max 79°F on Tue morning, min 73°F on Wed night). Winds decreasing (near gales from the WSW on Mon night, calm by Wed night). | Days 3-6 Weather Summary Mostly dry. Warm (max 75°F on Fri afternoon, min 72°F on Thu night). Winds increasing (calm on Fri night, strong winds from the SW by Sun afternoon). | Days 6-9 Weather Summary Light rain (total 0.2in), mostly falling on Tue afternoon. Warm (max 77°F on Wed afternoon, min 72°F on Tue afternoon). Winds decreasing (strong winds from the SW on Sun night, calm by Tue morning). | Long Range Forecast: Mostly dry. Warm (max 81°F on Sat afternoon, min 73°F on Thu morning). Mainly fresh 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 Keta Reef Oshima 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 Keta Reef Oshima Surf forecast
The above surf forecast table for Keta Reef Oshima provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Keta Reef Oshima can be found by selecting the local surf guide option on the grey menu. Our Keta Reef Oshima 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 (Keta Reef Oshima) 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 Keta Reef Oshima 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.
Keta Reef Oshima is 1 km (1 miles) from the city of Oshima. If you plan a holiday in Izu Islands, look for hotels and other accommodation in Oshima. Oshima has rooms for a wide range of budgets as well as car hire and transport links.
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