
Surf Forecasts:
Osaki Point surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 9PM (local time) - 4ft (1.2m), 9s period, ESE swell with glassy winds.
- Most powerful swell: Sunday 13 Sep, 12PM (local time) - 3ft (0.9m), 13s period, ESE swell with 317 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 0.5m and 7s. 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 0.9m 13s and forecast to arrive on Sunday (Sep 13) at 12PM. 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+) | 3AM (Sun 13th Sep) | 1.5ft (0.5m) 14s |
| Best Surf | 9PM (Mon 14th Sep) | 4ft (1.2m) 9s |
| Most Powerful | 12PM (Sun 13th Sep) | 3ft (0.9m) 13s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Right, grab a coffee and settle in, because this one's a bit of a slow burn before it gets properly wild. I'm Rusty, and I'm looking at the forecast for Osaki Point.
For the next several days, it's a bit of a write-off. The swell is small and onshore winds are making a mess of things. We've got a patch from Friday the 11th right through to the middle of the following week where the surf is either poor or marginal. Don't bother paddling out until we get a proper window. The wait is a long one.
The first real flicker of hope comes on Tuesday the 15th. The afternoon session at Osaki Point is looking glassy – that's a major positive. The wind dies right off, giving us a "glassy" surface. The swell is a modest 4ft from the ESE, with a combined energy of (313). It's not a world-beater, but for a Tuesday afternoon session, you'll be sharing it with barely anyone. The water temp is about average for this time of year, so nothing crazy there.
Now, hold on to your boardies. The standout is a full week away, on Saturday the 19th of September. This is the one you circle on the calendar. We’ve got a solid 15ft of groundswell, and it's a long-period 16-second pulse from the SE. The combined energy is a massive (10,131) – that's a lot of power in the water. The morning session has light offshore winds (NE at 6 mph), which will keep it clean. This is a big, powerful swell, so it's for experienced surfers only. It's way too big for beginners. The only caveat is the long period, which can make it a bit straight at beach breaks, but Osaki Point is a beach and reef setup, so you'll find some defined lines. Expect crowds to be possible.
Sunday the 20th is pretty much the same story, with another 15ft day from the SSE, combined energy still over (10,000) in the morning with light offshore winds. It's holding. Then Monday the 21st gets absolutely mental. A massive 28ft swell hits in the morning, with a 16-second period and combined energy of (36,097). By the afternoon it's 41ft with a 17-second period and energy of (92,562). The guidance says it's too big for this break, and with a fresh cross-onshore wind, it's going to be a mess. This is a "watch from the cliff" kind of day, or maybe a session for the big-wave chargers on a ski. For the average punter, it's not on.
The week after that, the wind turns nasty again. A near-gale on Tuesday the 22nd shuts it down, and then we get a brief window of clean, offshore winds on Wednesday the 23rd, but the swell has dropped right back to 4ft – ordinary, surfable waves but nothing special. It's a cruel comedown.
So, to sum it up: the best and only real standout is Saturday the 19th and Sunday the 20th of September. That's where the power and the clean conditions align. The rest of the 16-day window is either flat, onshore junk, or completely out of control.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Thu night. Warm (max 28°C on Sun morning, min 23°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Sun night. Warm (max 28°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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) | SSE 8 | SSE 7 | SSE 7 | S 7 | E 14 | E 14 | E 14 | E 13 | E 13 | ESE 8 | ESE 8 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
Wave Graph | |||||||||||||||||||
81 | 117 | 160 | 127 | 89 | 91 | 96 | 85 | 128 | 188 | 150 | 178 | 253 | 272 | 255 | 211 | 161 | 135 | 113 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | on | on | on | cross-on | on | on | cross | glassy | cross | glassy | glassy | cross-on | on | on |
High Tide | 5:34AM1.87m | 6:14PM1.84m | 6:15AM1.89m | 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 | |||||||
Low Tide | 11:39PM0.57m | 11:56AM0.20m | 00:12AM0.43m | 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 | ||||||
— | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | |
6:16 | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | |
mm | 9 | 1 | 2 | — | 1 | 2 | 3 | 1 | 1 | 8 | 1 | 1 | 3 | 1 | 2 | — | 1 | 4 | 10 |
Temp °C | 24 | 26 | 26 | 25 | 26 | 26 | 26 | 28 | 28 | 26 | 28 | 27 | 25 | 24 | 24 | 23 | 25 | 25 | 24 |
Feels °C | 27 | 29 | 28 | 28 | 28 | 29 | 30 | 32 | 32 | 30 | 32 | 30 | 30 | 27 | 27 | 26 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 7 | SSE 7 | S 7 | S 7 | S 7 | S 7 | ESE 9 | E 13 | ESE 8 | ESE 8 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
81 | 117 | 160 | 127 | 59 | 34 | 24 | 45 | 128 | 188 | 150 | 178 | 253 | 272 | 255 | 211 | 161 | 135 | 113 | |
Swell 2 Height (m) Direction Period (s) | SSW 8 | E 7 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | SSW 7 | E 13 | E 13 | E 12 | E 12 | E 14 | E 14 | E 13 | E 14 | E 13 | E 13 |
12 | 69 | 60 | 63 | 89 | 91 | 96 | 85 | 9 | 83 | 82 | 73 | 47 | 37 | 57 | 55 | 63 | 52 | 53 | |
Swell 3 Height (m) Direction Period (s) | ESE 11 | E 15 | ESE 10 | ESE 10 | SE 10 | ESE 10 | ESE 9 | S 7 | — | S 6 | S 7 | S 7 | S 7 | E 12 | S 6 | S 7 | S 7 | S 6 | SSW 5 |
22 | 69 | 9 | 18 | 24 | 37 | 33 | 14 | — | 3 | 4 | 4 | 1 | 11 | 1 | 1 | 1 | 1 | 3 | |
Wind waves Height (m) Direction Period (s) | E 6 | NE 4 | ENE 4 | NE 4 | ENE 5 | ENE 4 | — | SE 4 | ESE 8 | — | — | — | — | — | — | — | — | ENE 3 | ENE 4 |
57 | 3 | 25 | 8 | 19 | 7 | — | 3 | 82 | — | — | — | — | — | — | — | — | 4 | 8 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 22 | 22 | 22 | 22 | 22 | 16 | 16 | 356 | 16 | 22 | 20 | 0 | 3 | 0 | 0 | 22 | 22 | 16 |
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.










