Surf Forecasts:
Osaki Point surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 3AM (local time) - 4.5ft (1.3m), 10s period, S swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 6AM (local time) - 5ft (1.6m), 11s period, S swell with 628 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 3AM (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 Tuesday (Aug 18) at 3AM. 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 1.6m 11s and forecast to arrive on Friday (Aug 21) at 6AM. 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+) | 3AM (Tue 18th Aug) | 3ft (0.9m) 9s |
| Best Surf | 3AM (Fri 21st Aug) | 4.5ft (1.3m) 10s |
| Most Powerful | 6AM (Fri 21st Aug) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s break down what’s coming at Osaki Point (Osaki-Point). Right now, it’s a flat spell, so we’ve got a long quiet stretch ahead first.
The forecast starts Sunday the 16th of August with small, choppy surf – cross-onshore breezes and not much energy (367 on Sunday morning). Water temperature’s 83°F, about average for the time of year. Monday 17th and Tuesday 18th stay poor, with swell under 3ft and weak energy down to double digits. This flat run keeps going through Thursday 20th, but Friday 21st afternoon finally shows something: a 5ft SSE swell with 11-second period and clean cross-off winds.
Saturday 22nd and Sunday 23rd improve – offshore winds (SW and WSW), 5ft to 5ft from the SSW, and healthy energy (up to 467). Clean morning sessions with moderate to gentle offshores. Crowds sometimes show up here, so expect some company if it’s decent.
Now Monday the 24th of August is the real highlight. A solid 7ft to 7ft SE groundswell with a 16-second period, glassy in the morning. Energy is strong (2085). This is quality, long-period groundswell made for experienced surfers. Over 7ft and with that long period, it’s experts only – the reef and beach setup will be powerful.
Tuesday 25th keeps it going – glassy morning, 8ft from the SE, 15-second period, energy at 2878. Catch the dawn session before afternoon lumps creep in.
From Wednesday 26th, things get big and messy. Swell hits 13ft by afternoon with onshore winds. Thursday 27th is fresh cross-onshore, 13ft lumpy surf – more for kite surfers. Friday 28th gets even bigger: 16ft to 18ft from the SSE, choppy and cross-onshore.
Saturday 29th: the forecast says this swell is too big for the break – 20ft from the S with 14-second period. Only for the brave.
Sunday 30th and Monday 31st see swell drop back to 10ft to 15ft. Monday the 31st of August afternoon is the standout: glassy, 15ft from ESE with 16-second period, energy over 10,000. Forecast calls it exceptional for experts. That’s the best of the whole outlook, though it’s late in the window so don’t lock it in just yet.
Bottom line: first week is flat to marginal, with Monday and Tuesday the 24th and 25th being the cleanest power days. Second week is massive and only for experts, with the 31st the real prize if it all lines up.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Sun afternoon. Warm (max 28°C on Mon morning, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Warm (max 28°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | E 9 | ESE 6 | ESE 6 | SE 5 | ESE 9 | ESE 9 | ESE 8 | ESE 5 | ESE 8 | ESE 8 | ESE 5 | ESE 5 | S 9 | S 9 | S 10 | S 11 | S 11 | S 10 | SSW 10 | SSW 10 | SSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 251 | 195 | 132 | 67 | 154 | 140 | 101 | 36 | 94 | 112 | 33 | 37 | 111 | 159 | 349 | 617 | 516 | 458 | 407 | 341 | 287 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | glassy | cross-on | cross | glassy | cross | cross-off | off | cross-off | off | off |
High Tide | 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 | 4:23PM1.32m | 00:37AM1.34m | ||||||||
Low Tide | 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 | 7:29AM0.66m | 8:20PM1.27m | ||||||||
 |  |  |  |  |  | | |  | | | | | | | | | | |  | | |
 | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — |
 | — | 6:49 | — | — | 6:47 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — |
mm | 6 | 9 | 8 | 1 | — | 2 | 1 | 1 | — | 2 | — | — | 1 | 1 | 2 | 2 | 2 | — | — | — | — |
Temp °C | 26 | 27 | 26 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 26 | 29 | 29 | 27 |
Feels °C | 29 | 29 | 28 | 31 | 32 | 30 | 31 | 30 | 30 | 31 | 32 | 31 | 33 | 32 | 31 | 31 | 32 | 31 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 9 | E 10 | E 9 | ESE 9 | ESE 9 | ESE 8 | E 8 | ESE 8 | SE 10 | E 8 | ESE 5 | S 9 | S 9 | S 10 | S 11 | S 11 | S 10 | SSW 10 | SSW 10 | SSW 9 |
| kJ | 72 | 80 | 66 | 58 | 154 | 140 | 101 | 35 | 94 | 25 | 31 | 37 | 111 | 159 | 349 | 617 | 516 | 458 | 407 | 341 | 287 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | E 9 | SSW 8 | S 8 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 7 | SSW 8 | SE 10 | E 8 | SE 10 | ESE 10 | E 5 | SE 11 | E 9 | E 8 | E 9 | E 8 | E 10 |
| kJ | 23 | 28 | 54 | 33 | 32 | 30 | 19 | 19 | 18 | 11 | 25 | 19 | 25 | 40 | 11 | 29 | 55 | 35 | 56 | 49 | 65 |
Swell 3 Height (m) Direction Period (s) | SE 12 | ESE 10 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | SW 9 | SSW 8 | SE 10 | — | SSW 11 | SE 10 | SE 11 | SE 11 | SE 11 | SE 11 | ESE 10 | ESE 13 |
| kJ | 21 | 35 | 43 | 30 | 30 | 30 | 30 | 17 | 28 | 3 | 11 | 26 | — | 41 | 28 | 30 | 30 | 30 | 4 | 10 | 33 |
Wind waves Height (m) Direction Period (s) | E 9 | ESE 6 | ESE 6 | SE 5 | — | — | — | ESE 5 | — | ESE 8 | ESE 5 | — | ESE 5 | ESE 5 | — | E 9 | — | — | — | — | — |
| kJ | 251 | 195 | 132 | 67 | — | — | — | 36 | — | 112 | 33 | — | 38 | 27 | — | 38 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 483 | 22 | 22 | 497 | 16 | 16 | 20 | 16 | 22 | 544 | 0 | 20 | 20 | 0 | 20 | 0 | 0 | 0 | 0 | 0 |
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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