Surf Forecasts:
Osaki Point surf forecast from 29 Aug 2026:
- Best quality surf: Saturday 5 Sep, 9AM (local time) - 13ft (4.0m), 10s period, E swell with glassy winds.
- Most powerful swell: Saturday 5 Sep, 3PM (local time) - 15ft (4.5m), 10s period, E swell with 3,601 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 12PM (local time) - 2.5ft (0.7m), 8s period with S 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 29) at 12PM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.4m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 4.5m 10s and forecast to arrive on Saturday (Sep 05) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 29) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sat 29th Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 9AM (Sat 5th Sep) | 13ft (4.0m) 10s |
| Most Powerful | 3PM (Sat 5th Sep) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's look at what we've got on the cards for the next couple of weeks at Osaki Point.
We’re starting off this Saturday with some clean, fun little waves. It’s not the biggest swell you’ll ever see, but with that moderate offshore wind from the WSW and the ripples pushed away, it’s going to be a treat. The water is sitting at a balmy 85°, feeling a touch warmer than usual for this time of year, so you can get away with a spring suit. The combined energy is solid – a decent pulse of SSW groundswell pushing in. Saturday morning is the pick for a nice, relaxing session.
Sunday drops off a bit. The swell height dips and the wind swings more cross-offshore from the SW. The waves are still surfable, with moderate energy, but it’s a step down from Saturday. By Monday, the swell backs off even more, but it’s still clean with a cross-off breeze, making it a slow, small-wave day for the longboard.
Then things take a turn. From Tuesday the 1st through to the middle of the week, we’ve got a stormy pattern moving in. The wind swings onshore and we’re looking at a lot of cross-onshore chop and messy conditions. The swell height starts to build, but it’s chopped up. The energy jumps to moderate on Tuesday, but it’s not worth paddling out for that mess.
Now, here’s where it gets interesting for the experienced crew. On Thursday the 3rd of September, a serious swell starts to arrive. It’s big, bumpy, and the wind is still cross-onshore and messy, making it a bit of a war zone out there. This one is not for the faint-hearted. It’s huge – over 8 feet with energy readings shooting up. This is expert territory only, and even then, tricky.
Friday the 4th is a better prospect. The wind cleans right up, swinging offshore from the SW, and we’re still pulling a decent 7 feet swell with solid energy. The wind is offshore and moderate, making for some clean, powerful lines. This is the standout window for the more confident surfer.
After that, we hit another patch of poor weather. Saturday and Sunday the 5th and 6th are a write-off with strong onshore winds and lumpy, huge, messy waves. The energy readings are off the charts, but with that wind, it’s more of a kite-surfing setup than a paddle session.
As we push into the second week, there’s a glimmer of something special, but it’s far out. Monday the 7th of September brings an absolutely massive swell, with energy hitting monstrous levels. The wind is cross-shore and light, so it might have some shape, but 20 feet is a beast only for the elite. It’s a huge, risky day for the very experienced.
Then, the real gold comes on Sunday the 13th of September. We’re looking at a 16 feet groundswell from the ESE with a very long period and glassy conditions. The energy is staggering. This is the kind of day you tell your grandkids about if you’re good enough to handle it. It’s a big, powerful, long-period swell that will be breaking a bit straight on a beach break, but at Osaki Point – being a beach and reef setup – it’s going to produce some absolute slabs and barrels for the few who dare. This is the one to circle on the calendar, but we’re talking a week and a half out, so it’s a promising long-range hope rather than a guarantee.
Stay safe out there.
- Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Warm (max 30°C on Sat morning, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 72mm), heaviest during Wed night. Warm (max 29°C on Tue afternoon, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 8 | S 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 9 | SSW 9 | ESE 14 | S 9 | S 8 | SSE 8 | SSE 9 | S 8 | ESE 6 | SSE 12 | SSE 11 | S 10 | ESE 8 | ESE 9 | ESE 9 |
Wave Graph | |||||||||||||||||||||
142 | 54 | 134 | 97 | 73 | 54 | 99 | 99 | 67 | 148 | 205 | 212 | 295 | 196 | 329 | 1323 | 1511 | 653 | 398 | 453 | 1747 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | glassy | off | off | cross-off | cross-off | glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | glassy |
High Tide | 6:52PM1.81m | 6:48AM1.84m | 7:15PM1.82m | 7:26AM1.80m | 7:39PM1.81m | 8:07AM1.73m | 8:04PM1.78m | 8:53AM1.61m | 8:31PM1.72m | 9:51AM1.47m | 9:03PM1.65m | 11:17AM1.34m | 9:44PM1.55m | ||||||||
Low Tide | 12:34PM0.23m | 00:48AM0.49m | 1:02PM0.31m | 1:20AM0.41m | 1:31PM0.42m | 1:54AM0.35m | 2:01PM0.57m | 2:31AM0.34m | 2:33PM0.75m | 3:16AM0.36m | 3:07PM0.93m | 4:14AM0.42m | 3:51PM1.11m | ||||||||
5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | |
— | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:24 | — | |
mm | — | 1 | — | — | 2 | 2 | — | — | — | 2 | — | 8 | 5 | 5 | 27 | 12 | 7 | 6 | 4 | 4 | 7 |
Temp °C | 30 | 30 | 27 | 29 | 29 | 27 | 29 | 29 | 26 | 28 | 29 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 31 | 32 | 30 | 34 | 33 | 32 | 32 | 32 | 31 | 32 | 32 | 30 | 30 | 30 | 30 | 29 | 30 | 30 | 30 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | E 12 | S 7 | E 11 | SSW 7 | SE 10 | SSW 7 | SSW 9 | SSW 9 | S 8 | S 9 | S 8 | SSE 8 | E 11 | S 8 | SSW 10 | SSE 12 | SSE 11 | S 10 | S 9 | S 9 | S 10 |
44 | 54 | 37 | 97 | 36 | 54 | 99 | 99 | 66 | 148 | 205 | 212 | 119 | 196 | 135 | 1323 | 1511 | 653 | 347 | 246 | 284 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | E 12 | SE 11 | E 11 | E 11 | SE 10 | SE 10 | SE 10 | SSW 9 | E 13 | E 12 | E 12 | SE 11 | E 11 | S 9 | SSW 11 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 |
14 | 44 | 19 | 22 | 21 | 37 | 17 | 24 | 31 | 128 | 153 | 137 | 18 | 114 | 78 | 105 | 93 | 94 | 82 | 78 | 75 | |
Swell 3 Height (m) Direction Period (s) | SW 10 | SSE 9 | SSE 9 | SE 10 | SSW 10 | E 11 | E 11 | E 11 | ESE 14 | SE 9 | SE 10 | SE 10 | SW 14 | SW 12 | E 16 | E 10 | E 10 | E 12 | E 9 | E 15 | — |
4 | 8 | 8 | 17 | 11 | 22 | 21 | 21 | 67 | 22 | 16 | 15 | 7 | 39 | 5 | 71 | 18 | 12 | 43 | 4 | — | |
Wind waves Height (m) Direction Period (s) | SSW 8 | SW 4 | SSW 7 | — | SSW 7 | — | — | — | — | E 6 | — | — | SSE 9 | E 5 | ESE 6 | — | — | ESE 8 | ESE 8 | ESE 9 | ESE 9 |
142 | 34 | 134 | — | 73 | — | — | — | — | 1 | — | — | 295 | 39 | 329 | — | — | 400 | 398 | 453 | 1747 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 22 | 16 | 22 | 16 | 16 | 22 | 22 | 392 | 20 | 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.











