Surf Forecasts:
Osaki Point surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 12PM (local time) - 7.5ft (2.3m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 6AM (local time) - 11ft (3.5m), 9s period, S swell with 1,684 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 12PM (local time) - 7.5ft (2.3m), 8s period with SSE 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 Wednesday (Sep 09) at 12PM. The primary swell is predicted to be 2.3m and 8s period with a secondary swell of 0.1m and 18s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 3.5m 9s and forecast to arrive on Wednesday (Sep 09) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Thursday (Sep 10) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 9th Sep) | 7.5ft (2.3m) 8s |
| Best Surf | 12PM (Wed 9th Sep) | 7.5ft (2.3m) 8s |
| Most Powerful | 6AM (Wed 9th Sep) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the menu for Osaki Point over the next couple of weeks. We're in for a bit of a mixed bag, with some proper sessions hiding in there if you're patient.
The week kicks off with some solid size but shabby conditions. Wednesday the 9th sees a 10 ft south swell (2668 combined energy), but that 16 mph WSW wind is howling offshore, making it choppy. Thursday the 10th drops right off with messy, weak waves. Honestly, not worth paddling out for. The good news is that the weekend shows some promise. Friday the 11th is your first real standout: the swell has settled back to a clean 3 ft from the SSE with a nice 9-second period. But the real gem is that glassy wind in the morning. That is going to be clean as a whistle for a session.
Saturday and Sunday mornings on the 12th and 13th are flat with tiny, weak swell, so you can leave the board in the car. The next window that gets the pulse going is Tuesday the 15th. We have a 4 ft swell from the ESE with a calm, glassy morning and light offshore wind in the afternoon. It’s not huge, but it'll be fun and clean. Wednesday the 16th also offers a glassy morning and afternoon with 3 ft ESE swell. These two days are the pick of the first week.
Now, the second week is where it gets interesting, but a bit tricky. There's a dry spell through the 18th and 19th. Then on Sunday the 20th, we get a jump to 7 ft from the east, but those cross-onshore winds will make it a mess. The real story flips near the end of the window. Monday the 21st has a clean 4 ft swell with 3 mph offshore wind. But keep your eyes on Wednesday the 23rd and Thursday the 24th. We are looking at a massive pulse: 10 ft to 12 ft of SSE groundswell with a 16-second period and combined energy values over 4800. That is a very long period, powerful groundswell. At Osaki, a beach and reef setup, that long period can make it ledgey and unpredictable, especially with onshore winds. This is expert-only territory. The raw energy is undeniable, but the conditions will be challenging for the average surfer. It’s one to watch but not one for beginners.
The water temp is about average for this time of year, so no surprises there.
Signing off for now – Rusty.
Short Range ForecastHeavy rain (total 72mm), heaviest during Wed afternoon. Warm (max 27°C on Tue night, min 22°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 46mm), heaviest during Mon afternoon. Warm (max 28°C on Sun afternoon, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 10 | S 9 | SSE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | SSE 9 | SSE 8 | E 14 | E 14 | E 14 | E 14 | E 13 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 1670 | 1465 | 468 | 188 | 132 | 136 | 125 | 157 | 85 | 63 | 89 | 91 | 96 | 86 | 124 | 245 | 234 | 261 | 368 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | cross-on | cross-on | cross-on | on | cross-on | glassy | cross-on | on | on | on | on | on | cross-on | on | cross-on | on | cross |
High Tide | 3:59AM1.68m | 5:22PM1.76m | 4:50AM1.80m | 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 | |||||||
Low Tide | 10:29PM0.91m | 10:42AM0.17m | 11:05PM0.73m | 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 | ||||||
 |  |  |  |  |  |  | | | | | | | | | | | |  | |
 | — | 5:41 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — |
 | 6:20 | — | 6:19 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:12 | — |
mm | 33 | 11 | 21 | 1 | — | 3 | 1 | — | 2 | 3 | 1 | 4 | 11 | 3 | — | 9 | 4 | 11 | 36 |
Temp °C | 27 | 27 | 25 | 23 | 24 | 24 | 24 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 28 | 26 | 26 | 25 | 25 |
Feels °C | 31 | 29 | 28 | 22 | 24 | 25 | 28 | 30 | 31 | 28 | 29 | 30 | 30 | 30 | 31 | 29 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | E 19 | S 9 | SSE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | SSE 9 | SSE 8 | S 7 | S 7 | E 6 | E 14 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 |
| kJ | 7 | 1197 | 468 | 188 | 132 | 136 | 125 | 157 | 85 | 52 | 35 | 62 | 96 | 86 | 124 | 245 | 234 | 261 | 368 |
Swell 2 Height (m) Direction Period (s) | — | E 18 | E 18 | SSW 8 | SSW 8 | E 15 | SSW 8 | E 8 | E 14 | E 14 | E 14 | S 7 | ESE 9 | S 7 | E 13 | E 13 | E 13 | E 12 | E 12 |
| kJ | — | 6 | 6 | 24 | 13 | 18 | 20 | 55 | 60 | 63 | 89 | 23 | 32 | 23 | 87 | 53 | 52 | 48 | 47 |
Swell 3 Height (m) Direction Period (s) | — | — | WSW 7 | E 16 | E 16 | E 18 | E 9 | E 15 | ESE 10 | SE 10 | SE 10 | E 14 | S 7 | E 13 | S 7 | S 7 | S 7 | S 7 | S 7 |
| kJ | — | — | 5 | 21 | 21 | 6 | 14 | 69 | 9 | 23 | 24 | 91 | 15 | 85 | 15 | 8 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | SSE 10 | S 9 | NNE 3 | NE 6 | NE 6 | NE 5 | NE 3 | NE 3 | E 7 | E 7 | E 5 | NNE 4 | E 6 | — | E 4 | — | — | — | — |
| kJ | 1670 | 1465 | 8 | 156 | 111 | 25 | 3 | 2 | 51 | 33 | 29 | 2 | 60 | — | 4 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 22 | 20 | 22 | 22 | 22 | 22 | 16 | 0 | 16 | 16 | 22 | 16 | 16 | 22 | 22 | 22 | 16 | 16 | 20 |
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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