Surf Forecasts:
Osaki Point surf forecast from 9 Sep 2026:
- Best quality surf: Monday 14 Sep, 9PM (local time) - 4.5ft (1.4m), 9s period, SE swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 3AM (local time) - 5ft (1.5m), 9s period, ESE swell with 404 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 9PM (local time) - 4.5ft (1.4m), 9s period with SE 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 Monday (Sep 14) at 9PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.4m 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 1.5m 9s and forecast to arrive on Tuesday (Sep 15) at 3AM. Winds are predicted to be offshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 14th Sep) | 4.5ft (1.4m) 9s |
| Best Surf | 9PM (Mon 14th Sep) | 4.5ft (1.4m) 9s |
| Most Powerful | 3AM (Tue 15th Sep) | 5ft (1.5m) 9s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright folks, ol’ Rusty here with a look at the next couple of weeks for Osaki Point. Gotta be straight with you: the first week is a bit of a struggle. We’ve got a long stretch of nothing special from the 10th through the 17th, with only a few glimpses of hope. The water is sitting right around 83°, which is just about average for this time of year, so no surprises there.
The early days, from Thursday the 10th through Monday the 14th, are pretty much a write-off. The swell is small at 3 ft or less from the SSE, with a short period of 8 seconds, and the wind is messing it up – cross-onshore and choppy. The energy is weak to moderate at best (263). It’s surfable if you’re desperate, but honestly, it’s not worth getting wet.
We finally get a little window of calm on Tuesday the 15th. The wind goes completely glassy, and the swell, while still small at 4 ft to 4 ft from the ESE, has a slightly better period of 9 seconds. The energy is moderate (353). It’s not going to be epic, but it’ll be clean and you might find a few fun ones. That’s the best of the first week.
After that, it’s back to poor conditions from the 16th through the 18th, with the wind shifting onshore and the swell dropping off. Then, things get interesting. On Saturday the 19th and Sunday the 20th, a big punch of swell arrives from the SE. We’re talking 12 ft to 20 ft of long-period swell, with periods of 17 to 18 seconds. The energy is massive (8,764 to 19,231). This is a serious groundswell. Now, for the average surfer, it’s going to be too big. Over 8 ft is expert territory, and this is way over that. The wind is light, so the surface should be tidy, but that’s a lot of water moving. A long-period swell like this can be a handful at a beach-and-reef setup, but if you’re an experienced charger, it could be a standout moment. The model even says it might be too big for the break, so pick your spot carefully.
The swell drops quickly through Monday the 21st and Tuesday the 22nd, going from 13 ft back down to 3 ft, with the wind turning messy again. The rest of the forecast window into the 25th is mostly small, weak, and wind-affected, with the only real positive being a glassy morning on the 25th with tiny 3 ft waves.
So, to sum it up: the best on offer is a clean, glassy session on the 15th for the smaller-wave crew, and a massive, powerful Southern Ocean groundswell on the 19th and 20th for the experts only. That’s your call.
Rusty
Short Range ForecastHeavy rain (total 28mm), heaviest during Thu afternoon. Warm (max 27°C on Sat afternoon, min 22°C on Thu afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 70mm), heaviest during Tue night. Warm (max 27°C on Sun morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 8 | SSE 8 | SE 7 | SSE 8 | SSE 7 | S 7 | E 14 | E 14 | E 14 | E 13 | SE 8 | ESE 9 | ESE 9 | ESE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 130 | 123 | 107 | 99 | 82 | 124 | 89 | 89 | 96 | 85 | 132 | 228 | 216 | 264 | 360 | 305 | 237 | 194 | 151 | 147 | 121 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | off | glassy | glassy | glassy | cross-on | cross-on | cross-on |
High Tide | 5:48PM1.81m | 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 | 11:21AM0.16m | 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 | |||||||
 |  |  | |  |  | | |  | | | | | |  | |  | | |  | | |
 | 5:41 | — | — | 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 | 2 | 8 | 2 | 6 | 1 | — | 3 | 2 | 4 | 1 | 1 | 4 | 3 | 5 | 18 | 8 | 3 | 27 | 8 | 18 | 2 |
Temp °C | 23 | 22 | 24 | 24 | 25 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 24 | 23 | 24 | 23 | 23 | 24 |
Feels °C | 21 | 23 | 27 | 28 | 29 | 28 | 29 | 31 | 30 | 31 | 31 | 30 | 31 | 31 | 29 | 29 | 28 | 29 | 25 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SE 7 | SSE 8 | SSE 7 | S 7 | S 7 | S 7 | E 14 | ESE 9 | E 13 | E 13 | ESE 9 | E 12 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
| kJ | 130 | 123 | 107 | 99 | 82 | 124 | 59 | 45 | 96 | 45 | 125 | 83 | 216 | 72 | 360 | 305 | 237 | 194 | 151 | 147 | 121 |
Swell 2 Height (m) Direction Period (s) | E 16 | E 15 | SSW 8 | E 8 | S 8 | E 14 | E 14 | E 14 | ESE 9 | E 13 | SSW 7 | SSW 7 | E 13 | SSW 7 | E 12 | E 14 | E 13 | E 13 | E 14 | E 13 | E 13 |
| kJ | 21 | 18 | 12 | 44 | 41 | 63 | 89 | 89 | 32 | 85 | 9 | 9 | 52 | 5 | 46 | 37 | 55 | 55 | 64 | 52 | 54 |
Swell 3 Height (m) Direction Period (s) | S 8 | E 18 | ESE 11 | E 15 | E 14 | ESE 10 | ESE 10 | ESE 10 | S 7 | S 7 | E 6 | SSW 7 | SSW 7 | E 17 | SSW 7 | E 12 | SW 7 | S 7 | S 7 | S 7 | SW 7 |
| kJ | 5 | 6 | 22 | 69 | 60 | 19 | 37 | 37 | 15 | 14 | 3 | 9 | 5 | 5 | 5 | 11 | 2 | 1 | 1 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 5 | NE 3 | NE 3 | ENE 3 | NE 4 | NE 4 | NE 4 | SSE 4 | ESE 4 | SE 8 | ESE 9 | — | ESE 9 | — | — | — | — | — | NE 2 | ENE 3 |
| kJ | 107 | 21 | 2 | 2 | 9 | 11 | 21 | 7 | 17 | 6 | 132 | 228 | — | 264 | — | — | — | — | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 22 | 16 | 16 | 22 | 22 | 22 | 20 | 16 | 16 | 22 | 16 | 22 | 22 | 0 | 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.
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