Surf Forecasts:
Udo Shrine surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 3AM (local time) - 2ft (0.6m), 10s period, E swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 12AM (local time) - 5ft (1.6m), 10s period, E swell with 484 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 3AM (local time) - 2ft (0.6m), 10s period with E swell.
Best Forecast Surf Conditions for Udo Shrine this week:
The surf forecast for Udo Shrine over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 14) at 3AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.6m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Udo Shrine in the next 16 days are 1.6m 10s and forecast to arrive on Monday (Aug 17) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 10s period and expected on Sunday (Aug 16) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 14th Aug) | 2ft (0.6m) 10s |
| Best Surf | 3AM (Fri 14th Aug) | 2ft (0.6m) 10s |
| Most Powerful | 12AM (Mon 17th Aug) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for Udo Shrine over the next 16 days.
The Lowdown
Alright, let’s talk about what’s on the table. This is a tricky one, folks. The first few days are a real mixed bag with small, messy swell and cross-onshore winds, so don’t expect much.
Udo Shrine is a reef setup that’s inconsistent and often crowded, so it’s a spot you need to pick your moments. The early part of the outlook is a write-off. Thursday afternoon (13th August) has a tiny 2ft southerly swell, but it’s blowing a cross-offshore at 16 mph, which just makes it a choppy, poor mess. Through Friday and Saturday, the swell stays small, around 2ft to 3ft, and the wind is all over the place. There’s a brief moment Friday morning with a glassy 3ft south swell and hardly any wind, but the energy is weak (245) and the 8-second period is short, so it’s barely worth a paddle.
There’s a real gap here. From Sunday morning (16th August) all the way through to Thursday afternoon (20th August), the surf is tiny or onshore, with easterly winds and poor quality. The combined energy is mostly in the low to mid hundreds, which is weak. You’d be better off finding something else to do.
Finally, the first real standout arrives on Friday morning, 21st August. The swell bumps up to 5ft from the SSE, with a 10-second period and a moderate 438 combined energy. The wind is a clean cross-offshore from the south at 6 mph, and the break is exposed to that south swell. This is the first decent window for an intermediate surfer. The water is a warm 84°F, which is bang on average for the time of year here.
But hold onto your board, because the real magic is a long way off. On Sunday, 23rd August, the afternoon brings a massive 7ft ESE groundswell with a long 17-second period. The combined energy rockets to 2925, and the wind is glassy from the north. This is a serious setup. For the reef, that long period groundswell is going to produce some beautiful, powerful lines. This is for experienced surfers, as it’s over 8ft. The next morning, Monday 24th August, is the absolute peak: an 12ft SE swell, 17-second period, and a colossal 6726 combined energy. Glassy conditions from the north. This is exceptional, expert-only territory. The swell direction from the SE matches the optimum direction for the break perfectly.
Through the rest of that week, the swell stays huge (12ft) but the wind gets a bit tricky, with onshore and cross-onshore breezes kicking in. The long period drops off slowly, but the energy remains very strong. By Wednesday 26th August, the swell is still 12ft but the period is down to 14 seconds, still a major groundswell. The water will still be warm.
The very end of the forecast, from Thursday 27th August, looks like it’s gone flat again, with tiny 1ft to 2ft swell and almost no push.
So, to sum it up: the first week is a washout. The clear standout is the Monday 24th August morning session at Udo Shrine, with that massive, glassy, long-period groundswell. It’s a long-range call, so keep an eye on it, but it has the potential to be the session of the year.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri afternoon. Warm (max 28°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sun night. Warm (max 28°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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) | E 10 | S 8 | S 8 | S 10 | S 9 | S 8 | S 8 | S 8 | S 8 | E 10 | E 10 | E 10 | E 9 | E 9 | E 10 | E 9 | E 9 | E 9 | E 8 |
Wave Graph | |||||||||||||||||||
69 | 69 | 50 | 116 | 74 | 68 | 49 | 51 | 47 | 484 | 354 | 299 | 244 | 207 | 268 | 211 | 225 | 264 | 201 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-off | cross-off | on | cross-on | glassy | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on |
High Tide | 6:45AM2.18m | 7:42PM2.09m | 7:28AM2.14m | 8:10PM2.07m | 8:11AM2.04m | 8:36PM2.04m | 8:53AM1.91m | 9:02PM1.99m | 9:38AM1.76m | 9:28PM1.93m | 10:30AM1.62m | 9:55PM1.86m | |||||||
Low Tide | 00:55AM0.83m | 1:17PM0.18m | 1:32AM0.73m | 1:52PM0.32m | 2:09AM0.67m | 2:24PM0.52m | 2:46AM0.65m | 2:54PM0.73m | 3:25AM0.68m | 3:21PM0.94m | 4:07AM0.74m | 3:49PM1.13m | |||||||
— | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | |
7:00 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | |
mm | — | 1 | 3 | — | — | — | — | — | — | 4 | 2 | 1 | 1 | — | 1 | 3 | — | — | 3 |
Temp °C | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 28 | 30 | 30 | 28 | 29 | 29 | 29 | 30 | 31 | 31 | 32 | 31 | 31 | 30 | 30 | 30 | 28 | 28 | 30 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | ENE 10 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 10 | E 9 | E 9 | E 9 | E 8 |
69 | 69 | 147 | 187 | 173 | 170 | 170 | 200 | 208 | 326 | 354 | 299 | 244 | 207 | 268 | 211 | 225 | 264 | 201 | |
Swell 2 Height (m) Direction Period (s) | E 10 | E 9 | S 8 | S 10 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 8 |
68 | 61 | 50 | 116 | 74 | 68 | 49 | 51 | 47 | 31 | 20 | 19 | 18 | 20 | 20 | 10 | 11 | 4 | 12 | |
Swell 3 Height (m) Direction Period (s) | ESE 12 | ENE 11 | ESE 11 | SE 11 | ESE 11 | ESE 10 | ESE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | ESE 10 | SSW 9 | ESE 10 |
14 | 40 | 12 | 19 | 11 | 11 | 14 | 22 | 21 | 19 | 31 | 30 | 19 | 18 | 17 | 16 | 11 | 8 | 10 | |
Wind waves Height (m) Direction Period (s) | S 3 | S 4 | S 4 | — | — | — | — | NE 2 | — | E 10 | — | — | — | — | — | — | — | — | — |
3 | 7 | 10 | — | — | — | — | 1 | — | 484 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 324 | 0 | 13 | 371 | 0 | 1 | 692 | 33 | 33 | 33 | 33 | 33 | 310 | 33 | 33 | 33 | 33 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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Information about the Udo Shrine Surf forecast
The above surf forecast table for Udo Shrine provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Udo Shrine can be found by selecting the local surf guide option on the grey menu. Our Udo Shrine 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 (Udo Shrine) 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 Udo Shrine 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.
Udo Shrine is 10 km (6 miles) from Nichinan. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Nichinan. Nichinan has rooms for a wide range of budgets as well as car hire and transport links.











