Surf Forecasts:
Keta Reef Oshima surf forecast from 2 Nov 2026:
- Best quality surf: Thursday 5 Nov, 9PM (local time) - 6ft (1.8m), 13s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 5 Nov, 6AM (local time) - 10ft (3.0m), 10s period, SE swell with 2,024 kJ wave energy.
- Next surfable swell (1★+): Tuesday 3 Nov, 12AM (local time) - 3ft (0.9m), 12s period with SSE swell.
Best Forecast Surf Conditions for Keta Reef Oshima this week:
The surf forecast for Keta Reef Oshima over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Nov 03) at 12AM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.9m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Keta Reef Oshima in the next 16 days are 3.0m 10s and forecast to arrive on Thursday (Nov 05) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Saturday (Nov 07) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 3rd Nov) | 3ft (0.9m) 12s |
| Best Surf | 9PM (Thu 5th Nov) | 6ft (1.8m) 13s |
| Most Powerful | 6AM (Thu 5th Nov) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Keta Reef Oshima over the next 16 days.
Short Range ForecastHeavy rain (total 76mm), heaviest during Wed night. Warm (max 22°C on Mon morning, min 15°C on Mon afternoon). Mainly near gales. | Days 4-6 Weather SummaryHeavy rain (total 79mm), heaviest during Thu morning. Warm (max 21°C on Fri morning, min 13°C on Sat night). Winds decreasing (near gales from the NNE on Thu morning, light winds from the ESE by Fri night). | ||||||||||||||||||||
Monday 2 | Tuesday 3 | Wednesday 4 | Thursday 5 | Friday 6 | Saturday 7 | Sunday 8 | |||||||||||||||
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) | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 14 | SSE 13 | SSE 12 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | S 13 | S 12 | SSE 11 | WSW 6 | WSW 8 | WSW 8 | E 10 | ESE 10 | ESE 10 | ESE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 577 | 408 | 230 | 218 | 195 | 418 | 232 | 285 | 1157 | 1508 | 1196 | 1196 | 1116 | 463 | 271 | 268 | 88 | 52 | 54 | 55 | 57 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 12:24PM1.23m | 8:45PM1.17m | 1:17PM1.25m | 11:48PM1.11m | 1:49PM1.29m | 1:36AM1.18m | 2:14PM1.33m | 2:43AM1.27m | 2:37PM1.38m | 3:35AM1.35m | 2:59PM1.43m | 4:19AM1.40m | 3:23PM1.47m | ||||||||
Low Tide | 5:05PM1.13m | 5:18AM0.45m | 7:13PM0.96m | 6:40AM0.52m | 8:01PM0.77m | 7:42AM0.58m | 8:37PM0.57m | 8:30AM0.64m | 9:10PM0.40m | 9:10AM0.70m | 9:42PM0.25m | 9:46AM0.77m | 10:13PM0.14m | ||||||||
 |  |  | |  |  |  | |  | |  | |  | |  | | |  | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 4:47 | — | — | 4:46 | — | — | 4:45 | — | — | 4:45 | — | — | 4:45 | — | — | 4:44 | — | — | 4:43 | — |
mm | — | 14 | — | — | — | 2 | 4 | 11 | 45 | 74 | 5 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 18 | 18 | 18 | 17 | 15 | 15 | 17 | 17 | 18 | 20 | 21 | 20 | 17 | 16 | 16 | 16 | 13 | 13 | 14 |
Feels °C | 15 | 14 | 16 | 14 | 14 | 13 | 7 | 7 | 12 | 7 | 12 | 13 | 11 | 10 | 7 | 11 | 12 | 11 | 7 | 8 | 8 |
Swell 1 Height (m) Direction Period (s) | SSE 13 | SSE 13 | SSW 7 | SSE 12 | SSE 11 | SSE 13 | SSE 12 | ESE 8 | S 12 | ESE 10 | ESE 10 | ESE 10 | S 12 | SSE 11 | ESE 10 | E 10 | WSW 8 | WSW 8 | ESE 10 | ESE 10 | ESE 10 |
| kJ | 577 | 408 | 96 | 218 | 143 | 418 | 232 | 280 | 235 | 1508 | 1196 | 678 | 1116 | 463 | 171 | 78 | 88 | 41 | 54 | 55 | 57 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | SSE 12 | SSW 7 | SSE 14 | ESE 8 | S 14 | S 12 | NE 16 | S 12 | S 13 | S 13 | ESE 10 | ESE 10 | S 10 | SE 9 | E 10 | E 10 | WSW 7 | ENE 4 | SW 6 |
| kJ | 28 | 28 | 230 | 36 | 195 | 50 | 129 | 285 | 10 | 297 | 746 | 1196 | 318 | 205 | 17 | 13 | 52 | 52 | 5 | 3 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 9 | SE 9 | SW 7 | SW 7 | ESE 8 | — | — | S 16 | — | — | — | — | — | S 8 | S 8 | SSE 8 | SW 4 | NNE 4 | E 9 |
| kJ | — | — | 21 | 21 | 8 | 2 | 41 | — | — | 79 | — | — | — | — | — | 5 | 1 | 6 | 1 | 1 | 27 |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 6 | NE 4 | NE 3 | E 9 | E 5 | NE 5 | NNE 5 | ESE 9 | NNE 4 | NNE 5 | — | WSW 5 | WSW 6 | WSW 6 | WSW 8 | WSW 5 | — | NE 4 | N 4 | NE 4 |
| kJ | 48 | 237 | 8 | 3 | 79 | 33 | 87 | 107 | 1157 | 25 | 28 | — | 83 | 225 | 271 | 268 | 14 | — | 9 | 2 | 12 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 103 | 58 | 0 | 47 | 64 | 47 | 64 | 454 | 53 | 470 | 38 | 41 | 58 | 58 | 55 | 0 | 0 | 47 | 47 | 47 | 107 |
Best forecast wave conditions in Izu Islands | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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 16 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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