Surf Forecasts:
Osaki Point surf forecast from 15 Aug 2026:
- Best quality surf: Saturday 22 Aug, 3PM (local time) - 5ft (1.5m), 10s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 12PM (local time) - 11ft (3.5m), 10s period, S swell with 2,254 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 9PM (local time) - 3ft (0.9m), 9s 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 Monday (Aug 17) at 9PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.5m and 8s. 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 3.5m 10s and forecast to arrive on Friday (Aug 21) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 17th Aug) | 3ft (0.9m) 9s |
| Best Surf | 3PM (Sat 22nd Aug) | 5ft (1.5m) 10s |
| Most Powerful | 12PM (Fri 21st Aug) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s look at the Osaki Point area—it’s a slow start, but there are a couple of red-letter days if you’re patient. The water is around 83°F, right on average for this time of year.
The first week is mostly a write-off. Saturday the 15th to Tuesday the 18th: light to moderate cross-onshore winds, with swell from 3ft to 5ft, but it’s choppy and blown out. Very low energy (combined energy 132-323). Not worth the paddle. Wednesday the 19th through Friday the 21st stay small and messy, with onshore winds. A few marginal moments, but nothing exciting.
We get a little bump on Saturday the 22nd with a 5ft SSW swell, but the cross-on wind keeps it from being clean—only “marginal.”
Now, Sunday the 23rd is your first real window. Glassy conditions in the morning, with a 5ft SSW swell (combined energy 462). By the afternoon, the wind shifts cross-offshore, and you’ve got clean 6ft waves. This is a solid, fun day for intermediates. The break is a consistent beach-and-reef setup, but be ready for a crowd—it gets busy.
But the big dogs come on Monday the 24th and Tuesday the 25th. Monday morning: a tiny 2ft SE groundswell but with a 17-second period—super long, clean, and offshore winds (combined energy 536). Glassy. Monday afternoon: a solid 5ft SE swell at 16 seconds, cross-offshore winds, clean, excellent for experienced surfers (combined energy 1534). Then Tuesday morning is the bomb: 8ft of SE groundswell at 16 seconds, glassy conditions, and a combined energy of 3660. That’s pumping. But at 8ft, it’s a big, powerful wave—only for experts. That 16-second period is going to make it stack up fast, best on the reef and point sections.
After Tuesday, it fades fast. Wednesday the 26th still has some size but onshore winds mess it up. From Thursday the 27th, it’s back to small, weak waves and poor conditions for days at a time.
So, bottom line: Sunday the 23rd is fun, but if you want the real pulse-pounding stuff, mark your calendar for Monday the 24th and especially Tuesday the 25th. That Tuesday morning is gonna be one for the books for those skilled enough to handle it.
Catch ya in the water,
Rusty
Short Range ForecastHeavy rain (total 30mm), heaviest during Sun morning. Warm (max 28°C on Mon morning, min 25°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Tue night. Warm (max 28°C on Wed morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | SSW 9 | ESE 9 | ESE 6 | ESE 6 | ESE 9 | ESE 9 | ESE 9 | E 9 | ESE 5 | E 8 | E 8 | ESE 5 | ESE 6 | ESE 6 | ESE 6 | S 8 | SSE 9 | S 10 | SSE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 99 | 348 | 226 | 115 | 188 | 154 | 113 | 37 | 37 | 52 | 140 | 87 | 135 | 135 | 277 | 390 | 2130 | 1446 | 1203 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 7:50AM1.78m | 8:15PM1.77m | 8:31AM1.66m | 8:39PM1.71m | 9:15AM1.51m | 9:02PM1.65m | 10:05AM1.37m | 9:25PM1.57m | 11:19AM1.24m | 9:52PM1.48m | 2:11PM1.21m | 10:36PM1.40m | |||||||
Low Tide | 1:49AM0.50m | 2:01PM0.39m | 2:25AM0.47m | 2:30PM0.57m | 3:02AM0.48m | 2:55PM0.76m | 3:43AM0.53m | 3:19PM0.92m | 4:32AM0.59m | 3:42PM1.07m | 5:43AM0.65m | 4:02PM1.20m | |||||||
 |  | | |  |  |  | | |  | |  | | | |  |  | | | |
 | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — |
 | 6:50 | — | 6:49 | — | — | 6:47 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | 8 | 8 | 6 | 7 | 1 | — | — | — | — | 2 | — | — | — | — | — | 1 | 2 | 2 | 9 |
Temp °C | 26 | 26 | 26 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 26 | 26 | 28 | 28 | 26 |
Feels °C | 29 | 28 | 27 | 29 | 31 | 31 | 30 | 31 | 31 | 30 | 30 | 32 | 31 | 30 | 30 | 31 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 8 | S 9 | E 10 | S 8 | ESE 9 | ESE 9 | E 5 | E 8 | E 8 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | S 8 | E 9 | S 10 | SSW 10 |
| kJ | 99 | 72 | 76 | 66 | 33 | 154 | 113 | 12 | 37 | 52 | 20 | 23 | 26 | 25 | 27 | 390 | 37 | 1446 | 380 |
Swell 2 Height (m) Direction Period (s) | E 10 | ESE 11 | E 10 | SSW 8 | SE 11 | S 8 | S 8 | E 9 | SSW 8 | SSW 7 | SE 10 | SE 10 | SSW 8 | SSW 10 | — | SSW 12 | ESE 11 | E 14 | E 8 |
| kJ | 89 | 23 | 66 | 54 | 42 | 31 | 30 | 37 | 19 | 11 | 27 | 25 | 13 | 10 | — | 14 | 24 | 15 | 46 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | ESE 11 | SE 11 | — | SE 11 | SE 11 | S 8 | SE 10 | SE 10 | SW 9 | SE 10 | S 10 | S 9 | — | E 16 | — | E 14 | — |
| kJ | 23 | 21 | 23 | 43 | — | 30 | 30 | 29 | 17 | 28 | 3 | 25 | 2 | 6 | — | 5 | — | 15 | — |
Wind waves Height (m) Direction Period (s) | E 5 | ESE 9 | ESE 6 | ESE 6 | ESE 9 | — | ESE 5 | — | ESE 5 | ESE 4 | E 8 | ESE 5 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | SSE 9 | E 6 | SSE 9 |
| kJ | 24 | 348 | 226 | 115 | 188 | — | 33 | — | 32 | 18 | 140 | 87 | 135 | 135 | 277 | 178 | 2130 | 130 | 1203 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 22 | 22 | 497 | 22 | 22 | 20 | 0 | 51 | 356 | 16 | 22 | 20 | 16 | 51 | 16 | 16 | 22 | 49 | 20 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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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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