
Surf Forecasts:
Osaki Point surf forecast from 9 Aug 2026:
- Best quality surf: Monday 10 Aug, 6AM (local time) - 4.5ft (1.3m), 13s period, E swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 4.5ft (1.3m), 13s period, E swell with 538 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 6AM (local time) - 4.5ft (1.3m), 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 Monday (Aug 10) at 6AM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 1.2m and 10s. 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 1.3m 13s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 10th Aug) | 4.5ft (1.3m) 13s |
| Best Surf | 6AM (Mon 10th Aug) | 4.5ft (1.3m) 13s |
| Most Powerful | 6AM (Mon 10th Aug) | 4.5ft (1.3m) 13s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the menu. We've got a run of small, clean waves coming up at Osaki Point to start, but the real story is later on. The first batch of swell is pretty modest, but the winds look sweet for the most part.
We kick off Monday the 10th with a nice little window. Morning glass, some clouds, and a clean 4ft easterly swell rolling in at 12 seconds. That's a nice little groundswell, giving the waves some shape and energy (956 combined energy). It'll be a bit inconsistent between sets, but the paddle out will be easy. The water temp is about average for the time of year. Afternoon goes glassy calm too with a risk of a storm, but it’s still a tidy 4ft from the east. That first day is the standout of the near-term, with clean conditions and fun, user-friendly waves. This is a consistent spot, but it can get crowded with the "sometimes" crowd factor, so early morning is your best bet.
Tuesday the 11th sees a drop in quality. The swell shifts south, gets a bit weaker, and the wind turns onshore and cross-onshore. It's a write-off. Wednesday the 12th has a brief reprieve in the morning with another glassy session on a 4ft SSW swell, but the period drops to 10 seconds. By afternoon, it's poor again.
Thursday and Friday are pretty ordinary with smaller, weaker swells and dodgy wind. Not worth your time. Saturday the 15th and Sunday the 16th come back around with some clean conditions on a small, but fun 3ft easterly swell. Glassy mornings and clean afternoons, perfect for a longboard or a fish. The energy is weak (around 245-269), but the quality of the ride will be there.
Then we hit a real lull from Monday the 18th through to Sunday the 23rd. The swell window dries up badly, with tiny waves and poor winds. This spot is fairly consistent in general, so this extended flat spell is a bit of a drag, but it happens.
Now, hold onto your board. Monday the 24th and Tuesday the 25th are the big, promising, but uncertain standouts. On Monday morning the 24th, we see a long period groundswell start to fill in from the southeast, 15 seconds at 3ft. That's a very long period, which means better shaped waves with a lot of energy (461) but longer waits between sets. The wind is onshore though, so it'll be a bit messy.
The real kicker is Monday afternoon the 24th and Tuesday the 25th. The same southeast groundswell jumps to 6ft at 12-13 seconds. The energy jumps way up to 1309 and 1053 — that's strong. This is expert territory for sure, over 5ft and getting close to 7ft. It won't be a beginner's wave. The wind is light cross-onshore, so not perfect, but the sheer amount of energy from that long period southeast swell will make for some powerful, hollow waves on the reef at Osaki Point. It's a long-range call, so don't book your flights yet, but if that long-period groundswell hits right, it'll be the best session of the whole outlook.
So, to sum up: Monday the 10th is your best early call for clean, fun waves. The standouts are definitely the Monday afternoon and Tuesday of the 25th, if you're an expert and you don't mind a bit of cross-onshore breeze on a big, powerful southeast groundswell.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon afternoon. Warm (max 29°C on Tue afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 45mm), heaviest during Wed night. Warm (max 28°C on Fri afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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) | SSW 11 | E 12 | E 12 | E 12 | S 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | E 11 | E 11 | E 10 | SSW 9 | E 11 |
Wave Graph | |||||||||||||||||||
745 | 437 | 347 | 336 | 235 | 326 | 333 | 279 | 237 | 209 | 153 | 121 | 110 | 108 | 149 | 144 | 127 | 106 | 108 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | cross-on | on | cross-on | cross-off | glassy | cross-on | on | cross-on | cross-off | glassy | on | cross-on | cross | glassy | cross-off | cross-off |
High Tide | 2:43AM1.58m | 5:14PM1.67m | 3:53AM1.69m | 5:51PM1.76m | 4:50AM1.80m | 6:24PM1.81m | 5:39AM1.88m | 6:55PM1.83m | 6:25AM1.90m | 7:23PM1.83m | 7:08AM1.87m | 7:50PM1.81m | |||||||
Low Tide | 9:36PM1.16m | 10:03AM0.17m | 10:34PM1.05m | 10:55AM0.05m | 11:19PM0.92m | 11:40AM-0.01m | 11:59PM0.79m | 12:20PM0.01m | 00:36AM0.66m | 12:57PM0.08m | 1:13AM0.56m | 1:30PM0.22m | 1:49AM0.50m | ||||||
— | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | |
6:55 | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | |
mm | — | — | 1 | — | — | — | — | — | 1 | 22 | 14 | 2 | 4 | 2 | 1 | — | — | — | — |
Temp °C | 27 | 28 | 28 | 27 | 28 | 29 | 25 | 27 | 25 | 24 | 24 | 25 | 25 | 27 | 28 | 25 | 28 | 28 | 26 |
Feels °C | 33 | 32 | 33 | 31 | 30 | 30 | 27 | 30 | 27 | 26 | 27 | 29 | 29 | 30 | 31 | 28 | 31 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | E 12 | E 12 | S 10 | S 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 9 | SSW 9 | SSW 9 |
745 | 437 | 347 | 264 | 235 | 326 | 333 | 279 | 237 | 209 | 153 | 121 | 110 | 108 | 106 | 96 | 110 | 106 | 106 | |
Swell 2 Height (m) Direction Period (s) | E 13 | S 10 | S 10 | E 12 | E 11 | E 11 | E 11 | E 11 | E 11 | E 10 | E 10 | E 6 | E 10 | E 9 | E 11 | E 11 | E 10 | E 10 | E 11 |
673 | 290 | 202 | 336 | 196 | 185 | 184 | 116 | 85 | 51 | 30 | 16 | 45 | 62 | 149 | 144 | 127 | 96 | 108 | |
Swell 3 Height (m) Direction Period (s) | ESE 15 | SW 11 | SSW 10 | SW 10 | SW 10 | SE 13 | NE 5 | SE 13 | S 10 | SE 12 | SE 12 | E 9 | E 5 | SE 11 | SE 11 | SE 11 | SE 10 | SE 9 | SE 8 |
21 | 229 | 185 | 127 | 108 | 27 | 11 | 27 | 18 | 24 | 23 | 27 | 8 | 19 | 19 | 19 | 27 | 31 | 17 | |
Wind waves Height (m) Direction Period (s) | — | — | NE 4 | NE 4 | NE 5 | NE 5 | NNE 5 | NE 3 | E 3 | — | E 6 | — | — | E 5 | — | — | — | — | — |
— | — | 3 | 3 | 13 | 39 | 49 | 3 | 3 | — | 18 | — | — | 5 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 16 | 22 | 24 | 0 | 0 | 49 | 22 | 22 | 0 | 0 | 16 | 20 | 3 | 0 | 0 | 0 |
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.











