Surf Forecasts:
Osaki Point surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 3AM (local time) - 3.5ft (1.0m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with 1,176 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 3AM (local time) - 3ft (0.9m), 8s period with ESE swell.
Best Forecast Surf Conditions for Osaki Point this week:
The surf forecast for Osaki Point over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 3AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 1.7m 14s and forecast to arrive on Wednesday (Aug 26) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 2s period and expected on Tuesday (Aug 25) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 19th Aug) | 3ft (0.9m) 8s |
| Best Surf | 3AM (Fri 21st Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 3AM (Wed 26th Aug) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here again, but in feet and miles.
We gotta dry spell at Osaki Point to start. First chance for a wave is Thursday the 20th, but it’s small and nothing special. The real action comes on Friday the 21st.
That Friday morning the 21st is the pick of the first week. Glassy, no wind, with a clean 3ft swell out of the S, period of 9 seconds. The energy’s moderate at 212. That’s a beauty. Saturday the 22nd and Sunday the 23rd keep it clean, with swell building to 4ft and the wind staying light.
From Monday the 24th, the wind turns onshore and things get choppy and messy. The end of August gets real big but real ugly – strong onshore winds and huge, disorganised surf. Not for the recreational surfer.
But hold onto your board for the last standout. On Monday the 31st of August, we get an offshore wind (WSW at 6 mph) and a solid 8ft SSW groundswell with a period of 14 seconds. The energy is off the charts at 5935 (very strong), and conditions are reported as exceptional for experts. That’s one for the big-wave crew. The first week of September is pumping with huge swell, but the wind looks a little tricky.
Water temp is about average. Keep an eye on the calendar for that 31st, it’s a beauty if it holds.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Tue night. Warm (max 28°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 29°C on Sat morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 8 | ESE 8 | ESE 8 | ESE 7 | ESE 10 | ESE 10 | S 9 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 10 | SSW 10 | SSW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 96 | 87 | 79 | 43 | 38 | 39 | 126 | 160 | 168 | 216 | 211 | 193 | 212 | 281 | 226 | 127 | 161 | 171 | 115 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | glassy | glassy | cross-off | glassy | glassy | cross-off | off | glassy | cross-off | glassy | glassy | cross-off | glassy | cross-on | cross | on |
High Tide | 9:02PM1.65m | 10:05AM1.37m | 9:25PM1.57m | 11:19AM1.24m | 9:52PM1.48m | 2:11PM1.21m | 10:36PM1.40m | 4:23PM1.32m | 00:37AM1.34m | 4:44PM1.42m | 2:32AM1.39m | 5:05PM1.52m | |||||||
Low Tide | 3:43AM0.53m | 3:19PM0.92m | 4:32AM0.59m | 3:42PM1.07m | 5:43AM0.65m | 4:02PM1.20m | 7:29AM0.66m | 8:20PM1.27m | 8:58AM0.58m | 9:52PM1.18m | 9:53AM0.46m | 10:27PM1.07m | |||||||
 |  | |  |  |  | | | | | | | | | |  | | |  | |
 | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — |
 | 6:45 | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:38 | — |
mm | 4 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 26 | 28 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 28 | 28 | 26 |
Feels °C | 30 | 32 | 31 | 32 | 31 | 31 | 31 | 32 | 31 | 30 | 33 | 32 | 30 | 33 | 33 | 31 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | SE 10 | ESE 7 | E 7 | S 8 | S 9 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 10 | SSW 10 | SSW 10 |
| kJ | 96 | 87 | 26 | 43 | 26 | 32 | 126 | 160 | 168 | 216 | 211 | 193 | 212 | 281 | 226 | 127 | 161 | 171 | 115 |
Swell 2 Height (m) Direction Period (s) | SSW 7 | SE 10 | SSW 8 | SE 10 | ESE 10 | ESE 7 | SE 11 | ESE 11 | SE 11 | SE 11 | SE 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 12 | E 12 | E 12 |
| kJ | 11 | 27 | 11 | 25 | 38 | 15 | 29 | 44 | 29 | 30 | 33 | 32 | 30 | 49 | 47 | 30 | 106 | 72 | 69 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SSW 8 | SW 9 | SSW 7 | SSW 8 | ESE 10 | ESE 7 | E 7 | E 7 | E 9 | E 10 | ESE 10 | ESE 13 | SE 11 | SE 11 | ESE 11 | SE 10 | SE 10 | SE 9 |
| kJ | 28 | 11 | 3 | 11 | 12 | 39 | 16 | 8 | 8 | 15 | 16 | 10 | 35 | 30 | 30 | 23 | 35 | 34 | 31 |
Wind waves Height (m) Direction Period (s) | — | — | ESE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 79 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 16 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 49 | 20 | 16 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Osaki Point Surf forecast
The above surf forecast table for Osaki Point provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Osaki Point can be found by selecting the local surf guide option on the grey menu. Our Osaki Point 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 (Osaki Point) 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 Osaki Point 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.
Osaki Point is 14 km (9 miles) from Muroto. If you plan a holiday in Shikoku, look for hotels and other accommodation in Muroto. Muroto has rooms for a wide range of budgets as well as car hire and transport links.
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