Surf Forecasts:
Osaki Point surf forecast from 30 Aug 2026:
- Best quality surf: Sunday 6 Sep, 3AM (local time) - 4.5ft (1.4m), 15s period, SSE swell with glassy winds.
- Most powerful swell: Sunday 6 Sep, 3PM (local time) - 6.5ft (2.0m), 15s period, SSE swell with 1,739 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 3PM (local time) - 3.5ft (1.0m), 7s period with SSW 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 (Aug 30) at 3PM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.3m and 10s. Another secondary swell of 0.3m and 11s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 2.0m 15s and forecast to arrive on Sunday (Sep 06) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Monday (Aug 31) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sun 30th Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 3AM (Sun 6th Sep) | 4.5ft (1.4m) 15s |
| Most Powerful | 3PM (Sun 6th Sep) | 6.5ft (2.0m) 15s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s coming for this stretch of coast.
Right now, the surf is small and nothing special. On Sunday the 30th of August, we’ve got waves around 3 ft from the SSW with a short period of 7 seconds. The water is warm at 85°, a touch warmer than usual for this time of year. The wind is light and offshore, so the surface will be clean, but the waves are just surfable, not exciting.
Monday the 31st drops to 3 ft, still from the SSW, period up to 9 seconds. Winds stay light and cross-offshore, keeping it clean, but it’s still pretty average. The wave energy is weak.
Tuesday the 1st of September, the swell shifts east at 2 ft, but the wind goes cross-onshore, and the period is longer at 13 seconds. It’s marginal – more push but messy.
Wednesday the 2nd, the swell builds to 5 ft from the SSE, short period of 8 seconds, but the wind is cross-onshore and conditions are poor. The energy picks up, but it’s choppy.
Thursday the 3rd is still marginal with onshore wind in the morning and light cross-shore in the afternoon. Swell around 3-4 ft from the south.
Now here’s the good part. Friday the 4th of September, we get a proper pulse: 5 ft from the SSW with a 9-second period, and the wind is light cross-offshore turning offshore in the afternoon. The wave energy is solid. This is the first real window for a decent session. The break is Osaki Point, a beach and reef setup that’s consistent here. The swell direction is close to the optimum SSE, so it should work well. Crowds can show up sometimes, but with clean, offshore wind and chest-high waves, this is the pick of the early forecast.
Saturday the 5th looks even better. Swell holds at 5-6 ft from the SSW, period short at 8 seconds, but the wind is near glassy in the morning and light cross-offshore in the afternoon. Wave energy is strong. “Very good surf conditions” is the call. Head-high waves, clean, and fun. This is the standout.
Sunday the 6th of September, a big groundswell arrives from the SSE with a very long period of 15 seconds. Swell jumps to 6-7 ft, and the energy is strong. But the wind swings onshore from the east with a risk of thunderstorms. The long period makes the sets powerful, but at a beach and reef setup, it can break straight and get walled. It’s marginal for quality.
Monday the 7th through the 14th is mostly big and windy. Swell runs 7-12 ft from the SSE to SE, with periods of 10-14 seconds, but the wind is onshore or strong cross-onshore, often 20-40 km/h. The energy is very strong, but the conditions are poor to marginal. This stretch is more for kite surfing than paddle surfing – big swell, strong winds, not much clean surf.
Best bet: Friday the 4th and Saturday the 5th of September. Friday gives you clean, chest-high waves with offshore wind. Saturday is head-high, glassy, and very good. After that, it gets big and messy, so get it while you can.
Stay stoked,
Rusty
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Warm (max 30°C on Sun morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed morning. Warm (max 30°C on Fri morning, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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) | SSW 7 | SSW 7 | SSW 7 | SSW 9 | SSW 9 | SSW 9 | E 13 | E 12 | E 12 | SSE 8 | SSE 8 | SSE 8 | S 8 | S 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSE 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 104 | 101 | 74 | 99 | 99 | 79 | 130 | 113 | 140 | 226 | 211 | 176 | 121 | 347 | 492 | 367 | 344 | 405 | 344 | 267 | 653 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | on | cross | glassy | cross-off | off | off | off | cross-off | glassy |
High Tide | 7:15PM1.82m | 7:26AM1.80m | 7:39PM1.81m | 8:07AM1.73m | 8:04PM1.78m | 8:53AM1.61m | 8:31PM1.72m | 9:51AM1.47m | 9:03PM1.65m | 11:17AM1.34m | 9:44PM1.55m | 1:51PM1.33m | 11:02PM1.45m | ||||||||
Low Tide | 1:02PM0.31m | 1:20AM0.41m | 1:31PM0.42m | 1:54AM0.35m | 2:01PM0.57m | 2:31AM0.34m | 2:33PM0.75m | 3:16AM0.36m | 3:07PM0.93m | 4:14AM0.42m | 3:51PM1.11m | 5:38AM0.48m | 5:36PM1.26m | ||||||||
 |  |  |  | |  | |  | | | |  | | | | | | | | | | |
 | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — |
 | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:24 | — | — | 6:23 | — |
mm | 1 | 1 | 2 | — | — | — | — | — | 7 | 2 | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 30 | 30 | 27 | 30 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 27 | 29 | 29 | 27 | 30 | 30 | 27 | 30 | 30 | 27 |
Feels °C | 34 | 34 | 32 | 34 | 32 | 32 | 31 | 32 | 32 | 31 | 31 | 31 | 33 | 33 | 33 | 33 | 33 | 31 | 33 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SE 10 | SSW 7 | SSW 9 | SSW 9 | SSW 9 | S 8 | SSE 7 | SSE 7 | SSE 8 | SSE 8 | SSE 8 | S 8 | S 10 | SSW 10 | SSW 9 | SSW 9 | ESE 9 | SSW 11 | ESE 9 | SSE 15 |
| kJ | 104 | 17 | 74 | 99 | 99 | 79 | 90 | 89 | 140 | 226 | 211 | 176 | 121 | 347 | 492 | 367 | 344 | 86 | 149 | 88 | 653 |
Swell 2 Height (m) Direction Period (s) | SE 10 | E 11 | SE 10 | SE 10 | SE 10 | ESE 14 | E 13 | E 12 | E 12 | E 11 | E 11 | E 11 | E 10 | E 10 | ESE 9 | ESE 8 | ESE 8 | E 10 | ESE 9 | SW 11 | SSW 7 |
| kJ | 17 | 21 | 37 | 17 | 24 | 67 | 130 | 113 | 137 | 119 | 119 | 112 | 96 | 92 | 110 | 101 | 111 | 8 | 88 | 117 | 99 |
Swell 3 Height (m) Direction Period (s) | E 11 | SSW 10 | SW 9 | E 11 | E 11 | SE 10 | SE 9 | SE 10 | SW 9 | SE 9 | SE 11 | SW 12 | SSW 11 | SE 10 | SSE 10 | E 10 | E 10 | E 15 | SSE 17 | SSE 17 | SSW 10 |
| kJ | 22 | 11 | 13 | 21 | 9 | 15 | 22 | 16 | 21 | 14 | 18 | 73 | 79 | 15 | 10 | 18 | 18 | 4 | 29 | 258 | 125 |
Wind waves Height (m) Direction Period (s) | — | SSW 7 | — | SW 4 | — | — | — | — | — | E 5 | ENE 4 | — | — | — | — | — | — | SSW 9 | SSW 8 | SSW 8 | — |
| kJ | — | 101 | — | 4 | — | — | — | — | — | 2 | 5 | — | — | — | — | — | — | 405 | 344 | 267 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 20 | 0 | 22 | 497 | 0 | 16 | 20 | 0 | 0 | 0 | 0 | 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.
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