Surf Forecasts:
Osaki Point surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 19 Sep, 9AM (local time) - 15ft (4.5m), 15s period, ESE swell with onshore winds.
- Most powerful swell: Saturday 19 Sep, 3PM (local time) - 16ft (5.0m), 14s period, ESE swell with 10,756 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 3AM (local time) - 1.5ft (0.5m), 14s 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 (Sep 13) at 3AM. The primary swell is predicted to be 0.5m and 14s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.7m and 4s is also forecast. 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 5.0m 14s and forecast to arrive on Saturday (Sep 19) 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 0.4m 4s period and expected on Sunday (Sep 13) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 13th Sep) | 1.5ft (0.5m) 14s |
| Best Surf | 9AM (Sat 19th Sep) | 15ft (4.5m) 15s |
| Most Powerful | 3PM (Sat 19th Sep) | 16ft (5.0m) 14s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s look at what’s cooking for Osaki Point.
Right now, it’s pretty flat and quiet. The first week or so is lean, with only small, weak swell. We’re looking at nearly a week of tiny, average to poor conditions before things start to shape up.
From Saturday the 12th through Wednesday the 16th, it’s all small stuff. Wave heights are around 2ft to 4ft, with short swell periods. The combined wave energy is weak to moderate (between 160 and 306). There are some glassy moments, like Sunday morning (13th) with a 3 mph offshore breeze and clean conditions, and Tuesday (15th) is the best of this flat spell with glassy water and a 4ft swell. But even then, it’s only just surfable – nothing special.
A big quiet stretch hits from Thursday the 17th to Sunday the 20th. The swell gets bigger, but it’s all blown out by onshore wind. Thursday and Friday the 18th see onshores up to 12 mph and a rising swell hitting 6ft, but the quality is poor. Saturday the 19th brings a massive 15ft to 16ft swell with a very long 15-second period, but with strong onshore winds, it’s just too big and messy for this break. The wave energy is extreme (over 15,000), but it’s not for us.
Now, the real standout. Tuesday the 22nd is the one to get stoked about. Morning conditions are looking glassy, with a clean 8ft swell from the S, period of 9 seconds. The combined energy is a punchy 875 – moderate to strong. That’s proper surf. The wind is dead calm in the morning – glassy perfection. This is the best on offer. Later that afternoon it drops to 6ft, still clean with a cross-offshore breeze.
After that, things get messy again for a few days with strong winds and choppy seas, but then we get another promising window around Thursday the 25th. Friday morning the 25th is worth a look: a glassy, dead-calm morning with a 5ft E swell and period of 8 seconds. That’s clean and rideable.
So, to sum it up: the early stuff is slow. Save your energy for Tuesday the 22nd morning – that’s the highlight. Friday the 25th morning is a solid backup, but that Tuesday session is the one.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sat morning. Warm (max 28°C on Sun morning, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Wed night. Warm (max 27°C on Tue morning, min 23°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 14 | E 14 | E 14 | E 13 | ESE 13 | SE 9 | SE 8 | ESE 8 | ESE 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 7 | ESE 8 | ESE 8 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 89 | 91 | 96 | 85 | 253 | 148 | 162 | 120 | 172 | 241 | 203 | 165 | 151 | 121 | 121 | 96 | 108 | 290 | 461 | 522 | 759 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | glassy | cross | glassy | on | cross-off | glassy | glassy | glassy | glassy | cross-on | glassy | cross-on | on | on | on | on | on | on |
High Tide | 6:38PM1.84m | 6:54AM1.86m | 7:00PM1.83m | 7:32AM1.78m | 7:22PM1.79m | 8:09AM1.67m | 7:44PM1.73m | 8:48AM1.54m | 8:04PM1.66m | 9:33AM1.40m | 8:25PM1.57m | 10:38AM1.27m | 8:46PM1.48m | ||||||||
Low Tide | 12:28PM0.29m | 00:44AM0.34m | 12:58PM0.42m | 1:15AM0.29m | 1:25PM0.57m | 1:47AM0.29m | 1:50PM0.72m | 2:19AM0.34m | 2:13PM0.86m | 2:54AM0.42m | 2:34PM1.00m | 3:37AM0.53m | 2:52PM1.12m | ||||||||
 |  |  |  | | | | | |  | |  |  | | | | | |  | |  | |
 | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — |
 | — | 6:15 | — | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — |
mm | 1 | 2 | 4 | — | — | 1 | 1 | 1 | 2 | — | 1 | 1 | 4 | 3 | 6 | 2 | 3 | 1 | — | 1 | — |
Temp °C | 26 | 26 | 25 | 28 | 28 | 26 | 27 | 28 | 25 | 27 | 26 | 25 | 24 | 24 | 24 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 29 | 30 | 29 | 32 | 32 | 31 | 31 | 31 | 29 | 30 | 30 | 29 | 27 | 28 | 27 | 29 | 28 | 28 | 27 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | S 7 | E 14 | E 14 | ESE 9 | ESE 13 | SE 9 | SE 8 | ESE 8 | ESE 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 14 | E 13 | SE 16 | SE 17 |
| kJ | 59 | 91 | 96 | 53 | 253 | 148 | 162 | 120 | 172 | 241 | 203 | 165 | 151 | 121 | 121 | 96 | 108 | 4 | 13 | 43 | 647 |
Swell 2 Height (m) Direction Period (s) | E 14 | ESE 10 | S 7 | S 7 | SSW 7 | E 13 | E 13 | E 12 | E 12 | E 12 | E 14 | E 13 | E 14 | E 13 | E 13 | E 12 | E 12 | S 6 | SE 19 | S 10 | S 9 |
| kJ | 89 | 37 | 23 | 22 | 15 | 83 | 52 | 72 | 71 | 48 | 57 | 85 | 63 | 52 | 53 | 25 | 25 | 1 | 14 | 2 | 7 |
Swell 3 Height (m) Direction Period (s) | SE 10 | ESE 10 | ESE 9 | E 13 | E 4 | SSW 7 | SSW 6 | S 7 | S 7 | E 15 | S 6 | S 7 | S 7 | S 7 | S 7 | S 7 | E 16 | — | — | — | — |
| kJ | 24 | 37 | 33 | 85 | 2 | 4 | 4 | 4 | 4 | 17 | 1 | 1 | 1 | 1 | 1 | 1 | 5 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ENE 4 | SSE 7 | E 5 | — | ESE 4 | E 3 | — | — | — | — | — | — | — | — | — | — | NE 3 | ESE 7 | ESE 8 | ESE 8 | E 9 |
| kJ | 9 | 59 | 22 | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | 2 | 290 | 461 | 522 | 759 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 16 | 16 | 0 | 20 | 0 | 16 | 0 | 0 | 0 | 0 | 0 | 16 | 0 | 16 | 22 | 22 | 16 | 22 | 49 | 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.
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