Surf Forecast Surf Report

Keta Reef Oshima surfForecast / Izu Islands / Japan

information circle12 Day Weather and Surf, issued 8 am Friday 14 Mar 2025 JST
Forecast update in hr  min  s Forecast update imminent
Keta Reef Oshima surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Keta Reef Oshima sea temperature is
16.6° C
(Which is slightly cooler than normal)


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 Sunday (Mar 16) at 9PM. The primary swell is predicted to be 2.4m and 10s period with a secondary swell of 1.7m and 10s. 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 3.5m 10s and forecast to arrive on Sunday (Mar 16) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 5s period and expected on Sunday (Mar 16) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 16th Mar)8ft (2.4m) 10s
Best Surf 9PM (Sun 16th Mar)8ft (2.4m) 10s
Most Powerful12PM (Sun 16th Mar)11ft (3.5m) 10s

Table - best surf conditions forecast for Keta Reef Oshima over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1
E
0.6
ESE
0.4
ESE
0.3
ESE
1.3
E
1.9
ESE
2.3
E
3
SE
2.2
SSW
2.5
SW
2
SW
1
SW
0.6
SW
0.5
ESE
0.6
ESE
0.5
ESE
1.3
SSW
1
SW
0.5
SW
0.2
ESE
0.3
ESE
0.3
ESE
0.3
ESE
0.8
WSW
0.3
ESE
1.5
W
1
SW
0.6
SW
1.3
WSW
1.2
SW
0.9
WSW
1.3
SW
1.7
WSW
0.3
ESE
0.3
ESE
0.4
ESE
Period(s) (?)6611116691010999899991081111111161166676766101010
Wave
Graph
(?)Metric surfscale
Energy (?)78254024124263828190990411766351705747524529519231122324234122144593314512076145237212038
Wind
(km/h)
20
NE
10
S
15
SSW
35
NNE
35
NE
30
ESE
50
ENE
55
N
15
SW
65
WSW
45
W
10
SSE
25
N
15
NNE
30
NNE
20
WNW
30
NE
10
WSW
25
E
20
NNE
10
NNW
15
NNE
5
SSW
15
NW
10
W
35
WSW
10
NNW
15
N
10
S
30
WSW
30
WSW
45
SW
35
WSW
5
SW
40
SW
45
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscrosscross-
off
cross-
off
cross-
off
offcrosscross-
on
ononcross-
off
crosscross-
off
cross-
off
cross-
on
cross-
off
cross-
on
offcross-
off
crosscross-
off
crosscross-
on
ononcross-
on
crosscrossononcross-
on
onglasscross-
on
cross-
on
High Tide
/ height (m)
4:57PM
1.35
5:26AM
1.35
5:32PM
1.35
5:43AM
1.37
6:06PM
1.32
6:01AM
1.37
6:41PM
1.27
6:18AM
1.36
7:17PM
1.21
6:35AM
1.33
7:58PM
1.13
6:52AM
1.30
8:48PM
1.05
7:10AM
1.26
10:12PM
0.97
7:30AM
1.21
7:54AM
1.14
3:34AM 9:21AM
1.08 1.05
3:27AM
1.15
12:44PM
1.06
Low Tide
/ height (m)
11:02AM
0.42
11:12PM
0.21
11:29AM
0.32
11:38PM
0.28
11:57AM
0.25
12:03AM
0.38
12:24PM
0.21
12:28AM
0.48
12:52PM
0.19
12:51AM
0.59
1:21PM
0.19
1:12AM
0.70
1:55PM
0.22
1:30AM
0.81
2:39PM
0.27
1:39AM
0.91
3:45PM
0.32
5:33PM
0.34
7:32AM
1.05
7:15PM
0.28
8:31AM
0.93
8:20PM
0.19
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Sunrise5:56--5:54--5:52--5:50--5:50--5:48--5:47--5:46--5:43--5:43--5:41--5:39--
Sunset-5:47--5:49--5:50--5:51--5:51--5:52--5:52--5:53--5:54--5:54--5:55--5:57-
cloudpart cloudrain showerslight rainlight rainheavy rainheavy rainlight rainrain showersclearclearclearcloudcloudheavy rainrain showerslight rainrain showersrain showerspart cloudclearclearclearclearclearclearclearclearclearpart cloudclearpart cloudclearclearclearpart cloud
Rain (mm)
--125241721-----164111-----------------
Temp. °C12141510101212121212141299978979981212131514141516161617161717
Feels °C (?)6911236349-2362430351453888711131111771010811

Short Range Forecast: Heavy rain (total 52mm), heaviest during Sat night. Very mild (max 15°C on Fri night, min 9°C on Sat afternoon). Winds increasing (light winds from the S on Fri afternoon, gales from the WSW by Sun night).

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Tue night. Very mild (max 14°C on Mon afternoon, min 4°C on Tue night). Winds decreasing (gales from the WSW on Mon morning, light winds from the SSE by Mon night).

Days 6-9 Weather Summary Some drizzle, heaviest during Thu morning. Very mild (max 15°C on Sat afternoon, min 6°C on Thu morning). Winds increasing (light winds from the SSW on Fri afternoon, fresh winds from the WSW by Sat afternoon).

Long Range Forecast: Mostly dry. Very mild (max 17°C on Mon night, min 13°C on Sun morning). Winds increasing (calm on Sun morning, near gales from the SW by Wed morning).

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 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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