Surf Forecasts:
Osaki Point surf forecast from 11 Sep 2026:
- Best quality surf: Monday 14 Sep, 6PM (local time) - 3.5ft (1.0m), 9s period, ESE swell with glassy winds.
- Most powerful swell: Sunday 13 Sep, 3PM (local time) - 3ft (0.9m), 13s period, ESE swell with 312 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 12AM (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 12AM. 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 3PM. 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+) | 12AM (Sun 13th Sep) | 1.5ft (0.5m) 14s |
| Best Surf | 6PM (Mon 14th Sep) | 3.5ft (1.0m) 9s |
| Most Powerful | 3PM (Sun 13th Sep) | 3ft (0.9m) 13s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, grab your board, this is Rusty. Let’s see what’s coming our way through the next couple of weeks.
First off, the beginning of the period is pretty flat and messy. There’s really nothing worth paddling out for until the second weekend. The wind is all over the place, and the swell is tiny. It’s gonna be a long wait.
There’s a hint of life around Sunday the 14th and Monday the 15th, but it’s mostly junky with small waves and onshore breeze. Swell energy is weak (around 238-331) and the period is short, so don’t bother unless you’re just trying to wet your hair.
The real deal kicks off on Saturday the 19th of September. Osaki Point (United States) jumps up to a solid 13 to 15 ft from the SE with a very long period of 16-17 seconds. Wave energy goes crazy, hitting 8132 in the morning and 9073 in the afternoon. That’s a lot of water moving. But that long-period groundswell on a beach and reef setup can be a handful – waves might break fast and straight. This one is for experts only. The wind is onshore, so it’ll be a bit lumpy, but the power is undeniable.
Sunday the 20th keeps the heat on: another 15 ft of SSE swell, still with those long periods (15 seconds) and extreme energy (8983-10984). The water is about normal for this time of year, around 83°F, so nothing unusual there.
The crown jewel of this whole outlook is Monday the 21st of September. Early morning, Osaki Point is dead calm, glassy as a lake, with a massive 20 ft SE groundswell (14-second period). Combined wave energy is an insane 13009. This is serious big-wave territory. Only experts should be out there. The sets will be heavy and long, but the glassy face is as clean as it gets. Later in the day it backs off to a more manageable 10 ft ESE with a light offshore breeze, still excellent for the experienced crew.
After that big swell, Tuesday the 22nd and Wednesday the 23rd get windy and choppy again, with smaller waves, so it quiets down. The end of the forecast, around the 25th and 26th of September, builds back up nicely. Friday the 25th afternoon brings a clean 8 ft SE swell with light offshore wind – great shape for experienced surfers. Then Saturday the 26th morning is another standout: glassy, 12 ft SE groundswell (13 seconds), energy around 3937. That Saturday morning is a good second choice if you missed the Monday madness.
So, the surf really gets going in the second week, but the absolute best day is Monday the 21st for the big, clean bombs. Saturday the 26th is also a beauty.
Rusty out.
Short Range ForecastModerate rain (total 14mm), heaviest on Fri morning. Warm (max 28°C on Sun afternoon, min 24°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 43mm), heaviest during Mon night. Warm (max 28°C on Mon morning, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | SSE 7 | SSE 7 | S 7 | E 14 | E 14 | E 14 | E 13 | ESE 13 | ESE 8 | ESE 8 | ESE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 125 | 199 | 150 | 89 | 91 | 96 | 85 | 312 | 188 | 150 | 161 | 242 | 266 | 255 | 194 | 176 | 137 | 113 | 119 | 116 | 69 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | glassy | on | cross-on | on | cross-on | cross | glassy | cross-on | glassy | cross-on | on | on | on | on | cross-on | cross-on |
High Tide | 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 | 9:33AM1.40m | 8:25PM1.57m | ||||||||
Low Tide | 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 | 2:34PM1.00m | ||||||||
 | |  |  |  |  | |  | | | | |  |  |  | | | | | | | |
 | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — |
 | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — |
mm | 3 | 1 | — | — | 1 | 2 | 1 | — | 6 | — | 2 | 12 | 7 | 3 | 3 | 5 | 3 | 8 | 4 | 4 | 2 |
Temp °C | 26 | 26 | 25 | 27 | 27 | 26 | 27 | 28 | 26 | 28 | 27 | 26 | 23 | 23 | 24 | 25 | 25 | 25 | 26 | 26 | 25 |
Feels °C | 28 | 28 | 28 | 29 | 30 | 31 | 31 | 32 | 30 | 31 | 31 | 31 | 26 | 27 | 27 | 28 | 28 | 29 | 30 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SSE 7 | S 7 | S 7 | S 7 | S 7 | ESE 9 | ESE 13 | ESE 8 | ESE 8 | ESE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 8 |
| kJ | 125 | 199 | 150 | 59 | 34 | 24 | 62 | 312 | 188 | 150 | 161 | 242 | 266 | 255 | 194 | 176 | 137 | 113 | 119 | 116 | 69 |
Swell 2 Height (m) Direction Period (s) | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | 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 | E 12 |
| kJ | 70 | 60 | 63 | 89 | 91 | 96 | 85 | 9 | 83 | 82 | 73 | 71 | 48 | 57 | 55 | 63 | 52 | 53 | 25 | 25 | 25 |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | NE 6 | ESE 10 | ESE 10 | ESE 9 | S 7 | E 6 | SSW 7 | SSW 7 | S 7 | S 7 | E 15 | S 6 | S 7 | S 7 | S 7 | S 6 | S 7 | S 7 | SSE 9 |
| kJ | 5 | — | 10 | 19 | 37 | 33 | 22 | 3 | 4 | 5 | 4 | 1 | 17 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 4 | NE 4 | NE 4 | ENE 4 | — | ENE 6 | SE 8 | — | — | — | — | — | — | — | — | — | ENE 3 | — | — | — |
| kJ | 73 | 30 | 4 | 9 | 6 | — | 12 | 48 | — | — | — | — | — | — | — | — | — | 5 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 22 | 16 | 22 | 22 | 0 | 16 | 20 | 16 | 16 | 20 | 0 | 16 | 0 | 16 | 22 | 16 | 16 | 16 | 16 | 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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