Surf Forecasts:
Osaki Point surf forecast from 19 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6PM (local time) - 16ft (5.0m), 17s period, SE swell with onshore winds.
- Most powerful swell: Wednesday 26 Aug, 12PM (local time) - 25ft (7.5m), 14s period, ESE swell with 21,988 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 3AM (local time) - 1.5ft (0.4m), 10s 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 Thursday (Aug 20) at 3AM. The primary swell is predicted to be 0.5m and 7s period with a secondary swell of 0.4m 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 7.5m 14s and forecast to arrive on Wednesday (Aug 26) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 8s period and expected on Wednesday (Aug 26) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 20th Aug) | 1.5ft (0.4m) 10s |
| Best Surf | 6PM (Tue 25th Aug) | 16ft (5.0m) 17s |
| Most Powerful | 12PM (Wed 26th Aug) | 25ft (7.5m) 14s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down what the ocean’s got lined up for us.
So, the next couple of weeks at Osaki Point have some fun little windows, but then it gets pretty gnarly and blown out. There’s some real good clean swell early on, but you’ll have to wait out some rough weather later.
The action starts small but sweet. Thursday morning we’ve got a flat-calm, glassy ocean with a tiny 1 ft groundswell from the ESE. It’s super small, barely a ripple, but dead clean. The water temp is a balmy 83°, which is pretty normal for this time of year. Friday morning is where you want to get wet. A clean 3 ft swell from the S with glassy winds and moderate energy. That’s a fun little wave for a log or a fish. This pattern holds through the weekend right up to Sunday morning, where the swell nudges up to 4 ft from the SSW at 10 seconds, with the energy building nicely.
Now, the real gem is Monday the 24th of August at sunrise. You don’t want to miss it. We’ve got a 3 ft SE groundswell with a very long period of 16 seconds and strong energy (814). That’s going to push in some beautiful, lined-up waves that will wrap perfectly around the point. With glassy winds, this is the absolute pick of the forecast.
But fair warning... Things go south from Tuesday the 25th. The swell jumps over 8 ft with onshore wind, and by Wednesday the 26th, it’s a full-on 13 to 15 ft of raw, wind-blown energy (11,266) with onshore winds ripping at over 15 mph. That’s a serious, dangerous mess. For experts only, and even then it won't be pretty. The wind stays onshore from the NE and E for days after that, keeping it choppy and blown out. A lot of that time, with the swell over 5 ft and cross-onshore wind, this setup looks more fun for a kite than a paddle.
So, the takeaway: the first weekend and especially Monday morning the 24th are the golden hours. After that, it's a battle against the wind, and the long-range forecasts into early September are all big, raw, and onshore. Keep an eye on it, but don't hold your breath.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat afternoon. Warm (max 29°C on Fri afternoon, min 25°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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) | ESE 7 | ESE 10 | ESE 10 | S 9 | S 9 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 8 | SSW 9 | SE 15 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SE 17 | SE 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 43 | 38 | 39 | 126 | 168 | 180 | 165 | 146 | 140 | 101 | 86 | 233 | 1160 | 2140 | 3096 | 4437 | 7731 | 12722 | 16462 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-off | glassy | glassy | cross-off | off | glassy | cross-off | glassy | glassy | cross | glassy | on | cross-on | on | on | on | on |
High Tide | 9:25PM1.57m | 11:19AM1.24m | 9:52PM1.48m | 2:11PM1.21m | 10:36PM1.40m | 4:23PM1.32m | 00:37AM1.34m | 4:44PM1.42m | 2:32AM1.39m | 5:05PM1.52m | 3:36AM1.49m | 5:26PM1.60m | |||||||
Low Tide | 4:32AM0.59m | 3:42PM1.07m | 5:43AM0.65m | 4:02PM1.20m | 7:29AM0.66m | 8:20PM1.27m | 8:58AM0.58m | 9:52PM1.18m | 9:53AM0.46m | 10:27PM1.07m | 10:32AM0.35m | 10:56PM0.96m | |||||||
 |  | | |  | | | |  | | | | | | | | | |  | |
 | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — |
 | 6:45 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | 11 |
Temp °C | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 29 | 29 | 27 | 29 | 29 | 26 | 29 | 28 | 26 | 29 | 30 | 28 |
Feels °C | 31 | 32 | 32 | 31 | 32 | 33 | 30 | 33 | 32 | 32 | 32 | 33 | 30 | 32 | 31 | 30 | 31 | 32 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | E 7 | S 8 | S 9 | S 9 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 8 | SSW 9 | SSW 10 | SE 17 | SE 16 | SE 16 | SE 16 | SE 16 | SE 17 | SE 16 |
| kJ | 43 | 25 | 32 | 126 | 168 | 180 | 165 | 146 | 140 | 101 | 86 | 175 | 1160 | 2140 | 3096 | 4437 | 7731 | 12722 | 16462 |
Swell 2 Height (m) Direction Period (s) | SE 10 | ESE 10 | ESE 7 | ESE 10 | SE 11 | ESE 11 | ESE 11 | E 10 | E 10 | E 10 | SSW 11 | SE 15 | SSW 9 | SSW 10 | SSW 11 | S 9 | E 12 | E 14 | E 14 |
| kJ | 25 | 38 | 16 | 41 | 30 | 45 | 46 | 28 | 52 | 31 | 81 | 233 | 119 | 149 | 161 | 63 | 43 | 66 | 91 |
Swell 3 Height (m) Direction Period (s) | SSW 7 | SSW 8 | ESE 10 | ESE 7 | ESE 7 | ESE 6 | ESE 9 | SE 11 | SE 10 | ESE 13 | E 10 | E 10 | E 9 | E 18 | E 12 | E 16 | E 15 | E 11 | — |
| kJ | 11 | 12 | 39 | 16 | 9 | 8 | 27 | 33 | 16 | 35 | 50 | 29 | 27 | 6 | 74 | 20 | 40 | 23 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 7 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 44 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 0 | 22 | 49 | 20 | 22 | 356 | 42 |
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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