
Surf Forecasts:
Osaki Point surf forecast from 9 Sep 2026:
- Best quality surf: Saturday 12 Sep, 3AM (local time) - 4ft (1.2m), 7s period, S swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 3AM (local time) - 5ft (1.5m), 9s period, ESE swell with 362 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 3AM (local time) - 4ft (1.2m), 7s period with S 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 Saturday (Sep 12) at 3AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.4m and 14s. Another secondary swell of 0.3m and 3s is also forecast. 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 cross-onshore 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 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 12th Sep) | 4ft (1.2m) 7s |
| Best Surf | 3AM (Sat 12th Sep) | 4ft (1.2m) 7s |
| 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
G’day, Rusty here. Let’s be straight with you—looking at this stretch, the next week is going to test your patience. We’ve got a long run of poor surf ahead, with only tiny glimmers of hope before things finally fire up in the back half of the window. If you’ve got a quiver of logs and a lot of love for the ocean, you might find something, but for most, the board stays in the car for a while.
Right out of the gate, Wednesday afternoon is a write-off. We’ve got a cross-onshore breeze chopping up a 6ft SSE swell, and the energy is weak-to-moderate (496). It’s messy, and not worth the paddle. This poor stretch hangs around through Thursday and into Friday too, with light rain and onshore winds keeping things ordinary. The swell drops to around 3ft, but the quality just isn’t there.
There’s a tiny spark on Saturday morning. The wind goes glassy, and the SSE swell is a small 3ft with a weak period of 7 seconds. It’s surfable, but calling it good would be generous. The real action that day is the afternoon. A cross-offshore SSW wind cleans up a 2ft E swell (289) with a long 14-second period. It’s small, but clean—a proper longboard wave if you’re keen to get wet. Sunday and Monday slide back into the doldrums, with onshore winds and weak, short-period ESE swells making everything look average.
Now, here’s where it gets interesting. As we push into the following week, the models start showing a serious pulse on the horizon. Saturday the 19th is the first day things get properly big. A SE groundswell starts to build, hitting 10-13ft by the afternoon with a very long 16-second period. The energy is strong (5073-9309), but the wind is onshore, so it’s not going to be clean. Still, this is the start of something. Sunday the 20th is the standout—there’s a huge SE groundswell pushing 16-21ft, with energy maxing out at a powerful 25243. The wind is onshore though, and this much water is only for the experts. For most, it’s a spectator event. This is way too big for a beach and reef setup like this, and honestly, the conditions will be chaotic. If you’re a strong paddler, this is the biggest day on offer, but be realistic about your limits.
After that big pulse, Monday the 21st still has some solid swell (8-10ft) from the SSE, but it’s backing off and the wind is onshore, keeping it marginal. By Tuesday, it’s dropping out again, and we’re back to smaller, wind-affected waves.
One last thing—for the first session that’s even remotely worth it (Saturday morning), the water temp is sitting at 83°F, which is about average for this time of year. No surprises there.
So, bottom line: the first week is mostly a bust. The standout is Saturday the 20th, but only if you’re an expert. The cleanest waves on offer are probably Saturday the 12th afternoon, if you can find a longboard and some patience. Otherwise, this stretch is a good time to sort out your fins.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Fri morning. Warm (max 27°C on Wed afternoon, min 22°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 44mm), heaviest during Mon night. Warm (max 28°C on Sun morning, min 23°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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 | SSE 8 | SSE 8 | SE 7 | SSE 8 | S 7 | S 7 | S 7 | E 14 | ESE 14 | E 13 | ESE 13 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
Wave Graph | ||||||||||||||||||||
483 | 188 | 130 | 123 | 121 | 99 | 112 | 147 | 89 | 89 | 204 | 85 | 336 | 211 | 161 | 221 | 299 | 292 | 244 | 211 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | glassy | cross-off | glassy | on | cross-on | cross-on | on | on | glassy | on | glassy | glassy |
High Tide | 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 | 8:09AM1.67m | 7:44PM1.73m | |||||||
Low Tide | 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 | 1:50PM0.72m | 2:19AM0.34m | |||||||
— | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | |
6:19 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — | |
mm | — | — | 1 | 1 | 1 | 12 | 4 | 4 | 5 | 5 | 3 | 1 | — | 3 | 3 | 7 | 21 | 1 | 1 | 3 |
Temp °C | 27 | 24 | 23 | 23 | 24 | 24 | 25 | 25 | 27 | 27 | 26 | 28 | 28 | 26 | 26 | 24 | 24 | 25 | 25 | 24 |
Feels °C | 28 | 23 | 22 | 24 | 27 | 28 | 29 | 29 | 32 | 31 | 31 | 32 | 32 | 30 | 29 | 28 | 28 | 28 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SE 7 | SSE 8 | S 7 | S 7 | S 7 | S 7 | ESE 14 | ESE 9 | ESE 13 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
483 | 188 | 130 | 123 | 121 | 99 | 112 | 147 | 89 | 74 | 204 | 62 | 336 | 211 | 161 | 221 | 299 | 292 | 244 | 211 | |
Swell 2 Height (m) Direction Period (s) | E 18 | SSW 8 | SSW 8 | E 15 | SSW 8 | E 8 | E 14 | E 14 | E 14 | E 14 | S 7 | E 13 | SSW 7 | E 13 | E 13 | E 12 | E 12 | E 12 | E 14 | E 13 |
6 | 24 | 7 | 18 | 20 | 29 | 60 | 63 | 89 | 89 | 44 | 85 | 15 | 83 | 82 | 47 | 47 | 27 | 57 | 55 | |
Swell 3 Height (m) Direction Period (s) | E 18 | E 16 | E 16 | E 18 | ESE 11 | E 15 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 6 | S 7 | — | SSW 7 | SSW 7 | SSW 7 | SSW 7 | E 15 | SSW 8 | SSW 7 |
6 | 21 | 21 | 6 | 22 | 68 | 10 | 19 | 18 | 37 | 1 | 23 | — | 9 | 10 | 5 | 5 | 17 | 6 | 5 | |
Wind waves Height (m) Direction Period (s) | NE 2 | NE 6 | NE 6 | NE 5 | — | ENE 3 | ENE 4 | NE 3 | NE 3 | S 7 | — | E 5 | — | — | — | — | — | — | — | NE 3 |
1 | 118 | 100 | 26 | — | 4 | 13 | 4 | 2 | 89 | — | 5 | — | — | — | — | — | — | — | 2 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 22 | 22 | 22 | 22 | 16 | 16 | 22 | 16 | 0 | 0 | 0 | 16 | 49 | 16 | 16 | 16 | 0 | 16 | 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.










