
Surf Forecasts:
Osaki Point surf forecast from 6 Aug 2026:
- Best quality surf: Sunday 9 Aug, 9PM (local time) - 4.5ft (1.4m), 13s period, E swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 9AM (local time) - 15ft (4.5m), 12s period, SE swell with 5,863 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 9PM (local time) - 4.5ft (1.4m), 13s period with E 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 Sunday (Aug 09) at 9PM. The primary swell is predicted to be 1.4m and 13s period with a secondary swell of 1.1m and 12s. 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 4.5m 12s and forecast to arrive on Friday (Aug 07) 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+) | 9PM (Sun 9th Aug) | 4.5ft (1.4m) 13s |
| Best Surf | 9PM (Sun 9th Aug) | 4.5ft (1.4m) 13s |
| Most Powerful | 9AM (Fri 7th Aug) | 15ft (4.5m) 12s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here again, giving you the imperial version.
First off, the early part of the window is a write-off. A big storm system is kicking up a messy 15 ft swell from the SE on the morning of Friday the 7th, but with a 16 mph onshore wind from the East and risk of thunderstorms, it’s a total washout – poor surf conditions, and the combined energy is a massive 11233, but it’s all just wind-slop and chaos. That afternoon and into Saturday the 8th it stays cross-onshore, the swell drops fast but remains choppy and marginal. Not worth paddling out.
The real turning point comes Monday morning the 10th of August. The swell drops to a clean 4 ft from the East, but the kicker is the wind: glassy, dead calm, from the ENE. That’s the kind of morning you set the alarm for. The water is sitting at 85°F, which is a touch warmer than normal for this time of year, so you’ll be comfortable in boardshorts. The combined energy is 1190, a solid moderate pulse, and the period is 12 seconds – a nice groundswell that will set up well at Osaki Point, a beach and reef setup that’s consistently exposed to the SSE swell. The wind is offshore (WSW) for this break, so it’ll be clean. It’s rated for intermediate surfers, and with that swell size, it’s not too big for a confident beginner. Crowds are sometimes an issue here, so you might have a few mates out, but with those conditions, it’s worth it.
The glassy conditions hold through Tuesday afternoon the 11th, with a 5 ft SSW swell and a period of 11 seconds. The combined energy is 675, still moderate, and the wind is calm. That afternoon session could be very good, but the morning of the 11th is more marginal with a cross-onshore breeze. Wednesday the 12th is also a standout: clear skies, glassy calm in the morning with a 5 ft SSW swell at 11 seconds, and then a light cross-offshore in the afternoon. It’s clean, it’s head-high, and the water is warm. That’s the best run of the whole forecast.
After that, the surf fades hard. From Thursday the 13th onward, the swell drops below 3 ft, the wind turns onshore or cross-onshore, and the combined energy falls into the low hundreds. There’s a long stretch of poor-to-marginal conditions right through to the end of the window on the 22nd. A few days like the 22nd of August show a small 4 ft SSW swell at 11 seconds, but with cross-shore winds and only marginal quality, it’s not enough to get excited about. The whole second week is a dud – small, weak, and mostly choppy.
So, the standout is Monday the 10th of August, morning session at Osaki Point. That’s the one to mark on the calendar. Glassy, clean, warm water, and a solid 4 ft groundswell. Tuesday and Wednesday the 11th and 12th are also very good, especially the afternoons. After that, it’s a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Fri night. Warm (max 29°C on Sat afternoon, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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) | SE 12 | SSE 12 | S 12 | S 12 | SSW 11 | SSW 11 | E 13 | E 13 | E 13 | E 12 | SW 12 | SW 12 | SW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SW 10 | SSW 9 | SSW 9 |
Wave Graph | |||||||||||||||||||||
5863 | 4783 | 1738 | 1297 | 959 | 705 | 600 | 683 | 663 | 504 | 393 | 330 | 293 | 544 | 544 | 452 | 353 | 274 | 102 | 153 | 119 | |
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 | on | on | cross-on | glassy | glassy | cross | cross-off | on | glassy | cross-on | glassy | cross-off | cross-off | on | cross-on | on |
High Tide | 1:19PM1.32m | 11:39PM1.53m | 3:22PM1.41m | 1:12AM1.52m | 4:30PM1.55m | 2:43AM1.58m | 5:14PM1.67m | 3:53AM1.69m | 5:51PM1.76m | 4:50AM1.80m | 6:24PM1.81m | 5:39AM1.88m | 6:55PM1.83m | ||||||||
Low Tide | 5:44PM1.14m | 7:34AM0.44m | 7:56PM1.21m | 8:58AM0.31m | 9:36PM1.16m | 10:03AM0.17m | 10:34PM1.05m | 10:55AM0.05m | 11:19PM0.92m | 11:40AM-0.01m | 11:59PM0.79m | 12:20PM0.01m | 00:36AM0.66m | ||||||||
5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | |
— | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | 5 | 6 | 14 | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 4 | 3 | 19 |
Temp °C | 28 | 27 | 27 | 28 | 29 | 27 | 28 | 28 | 26 | 28 | 29 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 25 |
Feels °C | 30 | 28 | 29 | 29 | 31 | 30 | 31 | 31 | 30 | 32 | 33 | 31 | 31 | 32 | 29 | 30 | 30 | 28 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | SE 12 | SSE 12 | S 12 | S 12 | SSW 11 | SSW 11 | SW 12 | E 13 | E 13 | E 12 | SW 12 | SW 12 | S 10 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SW 10 | SSW 9 | E 7 |
5370 | 4783 | 1738 | 1297 | 959 | 705 | 568 | 683 | 663 | 504 | 393 | 330 | 244 | 544 | 544 | 452 | 353 | 274 | 102 | 153 | 69 | |
Swell 2 Height (m) Direction Period (s) | — | E 15 | E 15 | E 15 | ESE 10 | SE 8 | E 13 | SSW 12 | S 11 | S 10 | E 12 | S 11 | SW 11 | E 11 | E 10 | E 10 | E 10 | E 10 | S 9 | E 10 | SSW 9 |
— | 4 | 4 | 4 | 154 | 257 | 600 | 365 | 279 | 277 | 342 | 233 | 293 | 112 | 102 | 50 | 50 | 31 | 87 | 31 | 119 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 17 | E 9 | SE 8 | S 11 | SSW 11 | SW 12 | S 10 | E 12 | E 11 | NE 4 | SE 13 | SE 13 | SE 13 | SE 12 | E 10 | SE 12 | E 10 |
— | — | — | — | 11 | 212 | 157 | 188 | 227 | 393 | 202 | 214 | 149 | 7 | 27 | 27 | 26 | 24 | 31 | 22 | 49 | |
Wind waves Height (m) Direction Period (s) | SE 12 | ESE 10 | ESE 10 | ESE 9 | SE 8 | — | — | SE 8 | — | SE 7 | — | — | NE 3 | NE 4 | NNE 4 | NE 4 | NE 4 | — | E 4 | E 6 | — |
5863 | 842 | 1180 | 783 | 434 | — | — | 143 | — | 16 | — | — | 2 | 19 | 11 | 5 | 3 | — | 19 | 62 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 497 | 483 | 392 | 392 | 49 | 16 | 22 | 49 | 0 | 0 | 49 | 0 | 24 | 0 | 16 | 0 | 0 | 0 | 22 | 22 | 22 |
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.











