
Surf Forecasts:
Osaki Point surf forecast from 13 Sep 2026:
- Best quality surf: Saturday 19 Sep, 12PM (local time) - 15ft (4.5m), 15s period, ESE swell with onshore winds.
- Most powerful swell: Sunday 20 Sep, 6PM (local time) - 15ft (4.5m), 15s period, SE swell with 9,400 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 6PM (local time) - 2ft (0.6m), 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 (Sep 13) at 6PM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.8m and 8s. 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 15s and forecast to arrive on Sunday (Sep 20) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 13th Sep) | 2ft (0.6m) 13s |
| Best Surf | 12PM (Sat 19th Sep) | 15ft (4.5m) 15s |
| Most Powerful | 6PM (Sun 20th Sep) | 15ft (4.5m) 15s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
We’ve got a mixed bag coming up at Osaki Point. The first few days are nothing to write home about, but there are a couple of windows that’ll get your blood pumping.
Right now, on Sunday morning, we’re looking at tiny 2 ft easterly swell with a 13-second period, so there’s some long-period groundswell energy in the water, but it’s weak, with combined energy only 144. The wind is glassy out of the SE, and the water is sitting at 82°, about average for this time of year. Honestly, it’s surfable, but it’s pretty ordinary.
Sunday afternoon bumps up a touch to 3 ft, still from the ESE, but the wind goes cross and the conditions are marginal. Monday morning looks like a better bet—4 ft from the SE with a short 8-second period, but glassy S winds will make it clean. The energy jumps to a moderate 218. Monday afternoon stays clean with cross-offshore SSW winds and the same 4 ft swell. It’s not going to blow your mind, but it’s a solid start for a longboard or a fun shortboard.
Tuesday rolls in with a little more size—5 ft on the morning from the ESE, period still short at 9 seconds, and combined energy is moderate at 382. But the wind is cross-on from the north, so it’ll be a bit bumpy. Afternoon drops back to 4 ft with cross winds. Still not great.
Then we hit a rough patch. From Wednesday the 16th through Thursday the 17th, we’ve got onshore winds and poor surf, with waves dropping to 3 ft to 3 ft. By Friday the 18th, the swell bumps up to 8 ft from the east, but with strong onshore winds up to 12 mph, it’s a messy, choppy mess. The energy is moderate at 635, but the quality is shot.
Saturday the 19th sees a big jump in size—15 ft from the ESE with a very long 15-second period. The combined energy is strong at 14,898. But the wind is howling onshore at 12-16 mph, so conditions are poor. This one’s only for the experts, and honestly, the setup looks more interesting for kite surfing than paddle surfing. The same goes for Sunday the 20th: 12 ft to 10 ft from the east and NE, with strong onshore winds. Not a good time for a paddle.
Now, here’s where it gets interesting. Tuesday the 22nd brings an 18 ft swell from the SSW with an 11-second period, and the combined energy is strong at 7,293. The wind is a light cross-onshore from the ESE, so it’s not perfect, but for experienced surfers, this is a standout window. The swell direction is a bit off the optimum SSE, but the size and energy are undeniable. Afternoon drops to 10 ft with a cross wind.
The real standout, though, is Sunday the 27th and Monday the 28th. Sunday morning we’ve got 7 ft from the ESE with a 10-second period, and the wind is glassy calm from the NW. Combined energy is moderate at 1,094. This is clean, glassy surf that’ll be a joy for experienced surfers. Sunday afternoon stays glassy with a light S breeze. Monday morning the 28th bumps up to 7 ft from the ESE with a longer 12-second period, and the wind is light cross-offshore from the west. Combined energy is moderate at 1,915. Monday afternoon is even better: 8 ft from the ESE, 12-second period, and completely glassy. This is the best on offer—clean, powerful, and consistent. Crowds are possible here sometimes, so get in early.
For the second week, keep an eye on that Sunday-Monday window. It’s promising but less certain this far out.
Rusty, signing off.
Short Range ForecastHeavy rain (total 20mm), heaviest during Wed morning. Warm (max 28°C on Sun afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Wed afternoon. Warm (max 27°C on Sat morning, min 23°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | ESE 13 | SE 9 | SE 8 | SE 8 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 6 | E 8 | E 8 | ESE 17 | ESE 16 | ESE 15 | ESE 14 |
Wave Graph | ||||||||||||||||||||
253 | 148 | 206 | 158 | 272 | 334 | 313 | 216 | 165 | 132 | 161 | 86 | 65 | 267 | 537 | 753 | 2764 | 5155 | 8443 | 7317 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-off | glassy | on | glassy | glassy | on | cross-on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on |
High Tide | 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 | 2:00PM1.23m | 9:11PM1.37m | |||||||
Low Tide | 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 | 4:40AM0.64m | 2:36PM1.23m | ||||||||
— | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:48 | — | — | |
6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:05 | — | |
mm | 1 | 2 | 2 | — | 3 | 1 | 2 | 5 | 4 | 9 | 4 | 2 | 4 | 10 | 2 | 2 | — | — | 2 | — |
Temp °C | 28 | 26 | 28 | 28 | 25 | 26 | 26 | 25 | 26 | 26 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 27 | 25 | 25 |
Feels °C | 32 | 31 | 31 | 30 | 29 | 30 | 30 | 29 | 29 | 29 | 26 | 26 | 27 | 25 | 26 | 26 | 27 | 27 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | SE 9 | SE 8 | SE 8 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 12 | SE 20 | ESE 18 | ESE 17 | ESE 16 | ESE 15 | ESE 14 |
253 | 148 | 206 | 158 | 272 | 334 | 313 | 216 | 165 | 132 | 161 | 86 | 65 | 25 | 15 | 218 | 2764 | 5155 | 7076 | 7317 | |
Swell 2 Height (m) Direction Period (s) | S 7 | E 13 | E 13 | E 12 | E 12 | E 14 | E 14 | E 13 | E 14 | E 13 | E 13 | E 12 | E 12 | E 15 | S 10 | S 10 | S 9 | — | — | — |
8 | 83 | 52 | 72 | 69 | 37 | 57 | 87 | 63 | 52 | 53 | 26 | 25 | 4 | 2 | 2 | 7 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SSW 6 | SSW 6 | S 7 | S 7 | E 12 | S 6 | S 7 | S 7 | S 7 | S 6 | S 7 | S 7 | S 6 | — | — | — | — | — | — |
13 | 4 | 4 | 4 | 4 | 11 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 4 | — | — | — | — | — | — | — | ENE 3 | NE 4 | — | ESE 5 | E 5 | E 6 | E 8 | E 8 | E 8 | E 9 | ESE 15 | — |
1 | — | — | — | — | — | — | — | 3 | 16 | — | 30 | 47 | 267 | 537 | 753 | 650 | 836 | 8443 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 20 | 16 | 0 | 0 | 0 | 3 | 51 | 16 | 22 | 22 | 20 | 22 | 22 | 49 | 22 | 22 | 16 | 22 | 222 |
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.










