Surf Forecasts:
Osaki Point surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 6PM (local time) - 8ft (2.5m), 17s period, SE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 13ft (4.0m), 16s period, SSE swell with 7,857 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 9AM (local time) - 3ft (0.9m), 9s period with SSW 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 Saturday (Aug 22) at 9AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 4.0m 16s and forecast to arrive on Tuesday (Aug 25) at 9AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 22nd Aug) | 3ft (0.9m) 9s |
| Best Surf | 6PM (Mon 24th Aug) | 8ft (2.5m) 17s |
| Most Powerful | 9AM (Tue 25th Aug) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what’s on the table for the coming days. It’s a bit of a mixed bag, so let’s get into it.
The window starts off pretty calm. We’ve got some small, clean waves right out of the gate on Saturday the 22nd at Osaki Point (beach and reef). Swell is a modest 3ft from the SSW with a period of 9 seconds, and it’s glassy with a slight air. That’s your classic morning glass, perfect for a log or a funboard. The water temp is about average for the season, nothing to write home about. The energy is moderate (204), so it’s not a powerhouse, but it’s fun.
Sunday the 23rd offers similar small stuff – 3ft SSW swell with glassy conditions again in the morning. It’s not going to blow your socks off, but it’s rideable. Afternoon gets a bit of a cross-off wind, so those clean conditions fade.
Now, Monday the 24th is where things get interesting, but not necessarily in a good way for everyone. A new SE swell fills in, hitting 3ft in the morning with a proper long-period groundswell of 19 seconds. The energy jumps to strong (1018). That’s a lot of punch for a small height. It’s a bit cross-on, but the main issue is that long period. At a beach-and-reef setup like this, a 19-second swell can break pretty straight. By the afternoon, the swell bumps up to 8ft from the SE with a 16-second period, and energy is strong (2897). The wind goes cross-shore. This is getting into expert territory over 8ft. For the strong, experienced crew, there might be some juice.
Tuesday the 25th brings the biggest push of the whole run. The swell hits 13ft from the SSE with a 16-second period in the morning. The energy is very strong (7986). That is a lot of water moving, but the wind is howling onshore from the ENE at 15 km/h. This is going to be a washing machine. For paddle surfing, it’s a miss. The setup looks far more interesting for a kite session than a paddle session.
The rest of that week is on the messy side. Wednesday the 26th sees 10ft to 12ft of S to SSE swell, but it’s accompanied by moderate rain and cross-onshore or cross winds. Energy is still strong, but the surface is chopped up. Not the cleanest. Thursday the 27th drops back to 6ft, but winds are onshore or cross with light rain. It stays marginal.
We have a bit of a blank patch from Friday the 28th through to Sunday the 30th. The surf is still there but the conditions are poor, with onshore winds and rain showers making a mess of things.
The Standouts
Looking ahead, the real highlight of this 16-day span is Wednesday the 3rd of September. Thursday the 4th is also a gem, but let’s call the session on the 3rd the one to circle.
On Wednesday morning, September the 3rd, the wind goes glassy from the north at just 5 km/h. The swell is a solid 13ft from the SE with a 9-second period. The energy is very strong (4015). This is described as excellent for experienced surfers – and it is. Glassy conditions on a 13ft wave? That’s a proper, heavy session for those who know what they’re doing.
Then on Friday morning, September the 5th, we get another clean window. Glassy conditions with an ENE breeze at 5 km/h. Swell is a much more manageable 4ft from the S at 9 seconds. Energy is moderate (527). It’s not the size of the 3rd, but it will be clean, user-friendly, and fun for a wider range of surfers.
Saturday the 6th also looks clean in the morning with glassy conditions and a 5ft SSE swell, but the period is a longer 12 seconds. It’s a notch above the 5th in size, but still clean.
So, to wrap it up: don’t get too excited about the first week unless you’re looking at a kite on the 25th. The real payoff is the clean, glassy days around the 3rd and 5th of September. Keep an eye on that forecast, as those are the ones to make a plan for.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 30°C on Sun morning, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 74mm), heaviest during Thu morning. Warm (max 29°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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) | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SE 12 | SE 19 | SE 17 | SSE 16 | SSE 16 | SSE 15 | S 14 | S 13 | S 12 | SSE 10 | S 9 | S 9 | SSE 9 | S 9 | S 9 | S 9 |
Wave Graph | |||||||||||||||||||||
143 | 103 | 99 | 78 | 48 | 93 | 911 | 3204 | 5562 | 7857 | 7556 | 5986 | 2904 | 2151 | 712 | 529 | 384 | 366 | 476 | 627 | 356 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | glassy | cross-off | glassy | cross-on | cross | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-off | cross | cross-on | on |
High Tide | 4:23PM1.32m | 00:37AM1.34m | 4:44PM1.42m | 2:32AM1.39m | 5:05PM1.52m | 3:36AM1.49m | 5:26PM1.60m | 4:21AM1.60m | 5:47PM1.67m | 5:00AM1.71m | 6:09PM1.73m | 5:36AM1.78m | 6:30PM1.78m | ||||||||
Low Tide | 8:20PM1.27m | 8:58AM0.58m | 9:52PM1.18m | 9:53AM0.46m | 10:27PM1.07m | 10:32AM0.35m | 10:56PM0.96m | 11:06AM0.26m | 11:23PM0.84m | 11:36AM0.21m | 11:50PM0.72m | 12:05PM0.20m | 00:19AM0.60m | ||||||||
5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | |
— | 6:42 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:34 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 11 | 3 | 7 | 25 | 11 | 2 | 14 | 4 | — | 2 |
Temp °C | 29 | 29 | 27 | 30 | 30 | 27 | 28 | 28 | 26 | 29 | 29 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 27 | 26 | 26 |
Feels °C | 32 | 32 | 32 | 34 | 34 | 32 | 32 | 31 | 30 | 32 | 32 | 31 | 30 | 28 | 30 | 30 | 30 | 30 | 32 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SE 19 | SE 17 | SSE 16 | SSE 16 | SSE 15 | S 14 | S 13 | S 12 | SSE 10 | S 9 | S 9 | SSE 9 | S 9 | S 9 | S 9 |
143 | 103 | 99 | 78 | 48 | 58 | 911 | 3204 | 5562 | 7857 | 7556 | 5986 | 2904 | 2151 | 712 | 529 | 384 | 366 | 476 | 627 | 356 | |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | S 8 | SE 12 | SE 12 | S 9 | E 16 | E 15 | E 14 | E 14 | SE 9 | E 13 | SSW 11 | SSW 10 | SW 10 | SSW 11 | E 14 | E 13 | E 13 |
28 | 31 | 31 | 49 | 33 | 93 | 139 | 44 | 20 | 107 | 103 | 89 | 321 | 82 | 379 | 130 | 94 | 149 | 131 | 85 | 80 | |
Swell 3 Height (m) Direction Period (s) | SE 11 | ESE 10 | ESE 13 | SE 11 | E 10 | S 8 | E 12 | E 12 | SW 9 | — | — | E 11 | E 13 | E 19 | E 12 | E 12 | E 12 | E 11 | SSW 10 | SW 11 | SW 11 |
33 | 10 | 35 | 30 | 29 | 34 | 72 | 73 | 21 | — | — | 38 | 84 | 7 | 73 | 68 | 42 | 37 | 20 | 19 | 20 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | E 9 | — | — | — | SE 9 | ENE 3 | — | — | — | — | NE 3 | — | — |
— | — | — | — | — | — | — | — | 25 | — | — | — | 440 | 7 | — | — | — | — | 2 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 49 | 20 | 16 | 22 | 22 | 20 | 30 | 393 | 22 | 16 | 20 | 0 | 16 | 22 | 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.











