Surf Forecasts:
Osaki Point surf forecast from 30 Aug 2026:
- Best quality surf: Friday 4 Sep, 3AM (local time) - 5.5ft (1.7m), 8s period, SSE swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 3AM (local time) - 13ft (4.0m), 10s period, ESE swell with 3,108 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 3AM (local time) - 3ft (0.9m), 7s 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 Monday (Aug 31) at 3AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.3m and 11s is also forecast. 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 4.0m 10s and forecast to arrive on Monday (Sep 07) 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 0.6m 4s period and expected on Monday (Aug 31) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 31st Aug) | 3ft (0.9m) 7s |
| Best Surf | 3AM (Fri 4th Sep) | 5.5ft (1.7m) 8s |
| Most Powerful | 3AM (Mon 7th Sep) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, listen up, crew. Rusty here. We've got a mixed bag ahead at Osaki Point. The next couple of weeks are a real rollercoaster, so let's break it down. The overall pattern is this: we're starting dead flat and ordinary, then a run of messy, onshore junk before a window of big, clean groundswell shows up for the brave. There are gaps of several days with nothing worth paddling out for.
We kick off Monday 31 August with a tiny 3 ft SSW swell, period 9 seconds. The wind is light cross-off from the SW, so it's clean but weak – combined energy only 144, that's weak. Surfable but very ordinary. Tuesday 1 September drops even smaller – 2 ft from the east, cross-on breeze, just not worth it. Wednesday's swell picks up to 5 ft from the SSE, but period is a short 8 seconds and it's cross-on again. Energy is moderate at 371, but the wind kills it. Thursday 3 September is a write-off.
Friday 4 September morning brings a bump: 8 ft from the south, period 9 seconds, onshore ENE breeze at 6 mph. The combined energy hits 1038 – moderate to strong – but the onshore wind means it's messy. Still, it's the first real size of the forecast, so keep an eye on it. Saturday and Sunday get blown out by strong onshore winds and building swell – not for paddling.
Then Monday 7 September stays big and sloppy. By Friday 11 September, things get interesting but extreme. Morning has a massive 13 ft ESE swell with a near-gale SW wind at 31 mph – cross-off, so clean, but only for the hardcore. The afternoon is the real standout: 13 ft from the SE, wind switches to offshore WSW at 16 mph, energy strong at 4233. That's clean, heavy, and only for experts. If you've got the balls, it'll be the best session of the period.
Saturday 12 September afternoon is another top pick: 10 ft SSW, long period 16 seconds – that's groundswell, energy 4694, very strong. Wind is light easterly, cross-on, but with such long period the waves will have shape. Be aware, long-period SSW swell can straighten out on the beach break, so look for the points.
Sunday 13 and Monday 14 September stay solid but a bit less clean. Tuesday 15 September morning closes out with a 16 ft ESE monster and onshore wind – don't even think about it.
So if you're after the cleanest big waves, target Friday 11 September afternoon or Saturday 12 September afternoon. Smaller windows? Friday 4 September morning gave us a taste but was onshore. Overall, the water temp is about average for the time of year – no big anomaly reported.
Stay safe, and don't be a hero if you're not ready.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Tue night. Warm (max 30°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Wed night. Warm (max 29°C on Thu afternoon, min 25°C on Fri night). Winds increasing (calm on Wed night, fresh winds from the E by Sat afternoon). | ||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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 7 | SSW 9 | SSW 9 | SSW 9 | E 13 | E 12 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | S 8 | E 10 | SE 8 | S 9 | S 8 | S 8 | SSW 10 | ENE 8 | E 9 |
Wave Graph | |||||||||||||||||||
74 | 106 | 106 | 101 | 130 | 113 | 192 | 238 | 223 | 217 | 161 | 96 | 193 | 909 | 501 | 137 | 130 | 303 | 1465 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | on | cross-on | glassy | on | cross-on | cross-on | on | on | on |
High Tide | 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 | 1:51PM1.33m | 11:02PM1.45m | |||||||
Low Tide | 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 | 5:38AM0.48m | 5:36PM1.26m | |||||||
— | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | |
6:31 | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:24 | — | — | 6:23 | — | |
mm | 4 | — | — | — | — | — | 9 | 1 | — | 7 | — | — | 1 | — | 1 | 1 | 1 | 4 | 3 |
Temp °C | 27 | 30 | 30 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 27 | 29 | 29 | 27 | 27 | 26 | 25 |
Feels °C | 31 | 33 | 33 | 32 | 31 | 31 | 31 | 31 | 32 | 31 | 32 | 33 | 32 | 32 | 32 | 32 | 29 | 27 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SSW 9 | SSW 9 | SSW 9 | S 8 | S 7 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | S 8 | SSE 7 | SSE 7 | S 9 | S 8 | S 8 | SSW 10 | SSW 10 | SSW 10 |
37 | 106 | 106 | 101 | 90 | 112 | 192 | 238 | 223 | 217 | 161 | 90 | 71 | 909 | 501 | 137 | 130 | 170 | 114 | |
Swell 2 Height (m) Direction Period (s) | SW 9 | SE 10 | SE 10 | ESE 14 | E 13 | E 12 | E 12 | E 11 | E 11 | E 11 | E 10 | E 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SSE 7 | SE 12 |
13 | 17 | 24 | 67 | 130 | 113 | 137 | 119 | 119 | 112 | 73 | 96 | 123 | 111 | 108 | 86 | 67 | 9 | 6 | |
Swell 3 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | SE 10 | SE 9 | SE 10 | SE 9 | SE 9 | SE 11 | SE 10 | SE 10 | SSW 9 | SW 10 | E 10 | S 16 | SSW 10 | S 7 | — | — |
22 | 21 | 9 | 15 | 22 | 15 | 14 | 14 | 18 | 17 | 16 | 64 | 112 | 18 | 5 | 69 | 38 | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 7 | SW 4 | — | — | E 5 | — | — | — | — | — | — | — | SE 8 | — | NNE 4 | NE 5 | NE 5 | ENE 8 | E 9 |
74 | 11 | — | — | 1 | — | — | — | — | — | — | — | 193 | — | 11 | 33 | 83 | 303 | 1465 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 22 | 497 | 16 | 22 | 49 | 0 | 16 | 16 | 0 | 22 | 937 | 22 | 22 | 42 | 22 |
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.











