Surf Forecasts:
Udo Shrine surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 9PM (local time) - 6ft (1.9m), 13s period, SE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 9PM (local time) - 6ft (1.9m), 13s period, SE swell with 1,261 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 12AM (local time) - 4ft (1.2m), 9s period with S 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 21) at 12AM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.6m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Udo Shrine in the next 16 days are 1.9m 13s and forecast to arrive on Tuesday (Aug 25) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 7s period and expected on Thursday (Aug 20) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 21st Aug) | 4ft (1.2m) 9s |
| Best Surf | 9PM (Tue 25th Aug) | 6ft (1.9m) 13s |
| Most Powerful | 9PM (Tue 25th Aug) | 6ft (1.9m) 13s |
Table - best surf conditions forecast for Udo Shrine over the next 16 days.
The Lowdown
Alright, let’s get into it. This is a weird one. The long-range models are showing a massive pulse of energy coming in, but for the next week, you’re gonna want to sit on the beach and watch the horizon rather than paddle out. There’s a big gap at the start—nothing really worth the wax from now until around Friday, August 23rd. The swell is small, direction is all over the place, and the wind is almost always cross-onshore or onshore, making for choppy, messy conditions. The wave energy is weak to moderate (135 to 337), so it’s just not happening.
The first real glimmer of something shows up on the morning of Tuesday, August 27th at Udo Shrine (Miyazaki). This is a reef break, but it’s inconsistent and can get crowded, so keep that in mind. The water temperature is 84°F, which is pretty much what you’d expect for the time of year—no surprises there. The morning of the 27th has a 10ft swell from the SSE with a 15-second period, and the wind is light and offshore from the NE. That’s a clean window, but the size is already pushing 10ft, so this is for experienced surfers only. The wave energy is very strong (4,629), and it’s a proper groundswell.
However, the absolute standout is the morning of Friday, August 30th. The swell is 13ft from the SSE, with a 16-second period, and the wind is light and cross-onshore from the N. That’s a lot of water moving, and the energy is insane (8,320). This is massive, powerful, long-period groundswell. At a reef, this could be a real special session, but you need to be on your game. It’s going to be big and the sets will be widely spaced. The wind is a little cross-onshore, so it won’t be glassy, but the quality is there for the experts. After that, the swell slowly drops, and by the start of September, the winds turn more onshore and the quality fades.
So, if you’re a confident surfer with a big-wave board, mark your calendar for the morning of the 30th of August. It’s the best on offer in this 16-day window, but it’s a long way off and the forecast could shift. The morning of the 27th is a solid backup, but it’s not the main event.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Warm (max 28°C on Tue afternoon, min 27°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Warm (max 28°C on Fri afternoon, min 26°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | E 9 | E 9 | E 8 | E 8 | E 8 | SSE 9 | SSE 9 | S 9 | S 10 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | E 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 101 | 94 | 113 | 112 | 82 | 103 | 169 | 235 | 307 | 287 | 239 | 192 | 230 | 173 | 224 | 160 | 111 | 140 | 116 | 71 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | on | cross-on | glassy | cross-on | cross-on | cross | on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on |
High Tide | 9:28PM1.93m | 10:30AM1.62m | 9:55PM1.86m | 11:45AM1.51m | 10:29PM1.78m | 2:13PM1.49m | 11:25PM1.69m | 4:05PM1.59m | 1:09AM1.65m | 4:44PM1.70m | 2:48AM1.69m | 5:13PM1.80m | ||||||||
Low Tide | 3:21PM0.94m | 4:07AM0.74m | 3:49PM1.13m | 4:58AM0.81m | 4:22PM1.30m | 6:09AM0.87m | 5:30PM1.44m | 7:47AM0.86m | 8:18PM1.48m | 9:11AM0.77m | 9:49PM1.39m | 10:07AM0.64m | 10:34PM1.27m | |||||||
 |  |  | | | | | |  | |  | | |  | |  | | | |  | |
 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — |
 | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — | — | 6:47 | — |
mm | — | 1 | — | — | 4 | — | — | 1 | 1 | — | 1 | 1 | — | — | — | 1 | — | — | — | — |
Temp °C | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 31 | 31 | 30 | 31 | 31 | 31 | 32 | 33 | 31 | 32 | 31 | 31 | 31 | 30 | 31 | 31 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | SSE 5 | E 8 | E 8 | SSE 9 | SSE 9 | S 9 | S 10 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 |
| kJ | 101 | 94 | 9 | 112 | 82 | 103 | 169 | 235 | 307 | 287 | 239 | 192 | 230 | 173 | 163 | 160 | 111 | 140 | 116 | 68 |
Swell 2 Height (m) Direction Period (s) | S 6 | SE 10 | SE 10 | SSE 5 | SSE 6 | E 8 | E 8 | E 8 | E 8 | E 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 10 | E 11 | E 10 | E 10 | E 10 | E 12 |
| kJ | 17 | 27 | 27 | 9 | 18 | 60 | 57 | 49 | 34 | 40 | 25 | 27 | 26 | 42 | 47 | 82 | 96 | 96 | 47 | 71 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SW 9 | S 7 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | SE 11 | ESE 11 | E 14 | ESE 13 | ESE 12 | SE 11 | SE 10 | E 12 | E 9 |
| kJ | 17 | 3 | 4 | 26 | 25 | 25 | 26 | 26 | 30 | 30 | 30 | 31 | 40 | 35 | 35 | 26 | 30 | 27 | 69 | 43 |
Wind waves Height (m) Direction Period (s) | — | SSE 7 | E 8 | — | — | — | — | — | — | — | — | — | — | — | S 8 | — | — | — | — | — |
| kJ | — | 31 | 113 | — | — | — | — | — | — | — | — | — | — | — | 224 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 342 | 19 | 33 | 342 | 13 | 33 | 324 | 0 | 33 | 33 | 19 | 33 | 33 | 19 | 213 | 324 | 13 | 33 | 371 | 5 |
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.
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