Surf Forecasts:
Udo Shrine surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6PM (local time) - 18ft (5.5m), 16s period, SE swell with onshore winds.
- Most powerful swell: Tuesday 25 Aug, 9PM (local time) - 20ft (6.0m), 15s period, SE swell with 16,639 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6PM (local time) - 18ft (5.5m), 16s period with SE 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 Tuesday (Aug 25) at 6PM. The primary swell is predicted to be 5.5m and 16s period with a secondary swell of 0.4m and 15s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Udo Shrine in the next 16 days are 6.0m 15s and forecast to arrive on Tuesday (Aug 25) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Tuesday (Aug 25) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 25th Aug) | 18ft (5.5m) 16s |
| Best Surf | 6PM (Tue 25th Aug) | 18ft (5.5m) 16s |
| Most Powerful | 9PM (Tue 25th Aug) | 20ft (6.0m) 15s |
Table - best surf conditions forecast for Udo Shrine over the next 16 days.
The Lowdown
Alright, let’s break down what’s coming up. The only spot in the mix for the next 16 days is Udo Shrine, a reef break. It’s an inconsistent wave, so don’t expect it to be firing all the time, and when it does, it can get pretty packed.
The first stretch is a total washout. Starting Saturday, August 22nd, through the early part of the next week, we’ve got tiny, weak swell and cross-onshore breezes. The wave energy is low (179) on Saturday, and the water temp is about normal for the season. Not worth getting wet.
Things start to get a pulse on Monday, August 24th afternoon. The swell bumps up to 6ft from the SE, with a 17-second period – that’s a long-period groundswell, which usually means more power but can make beach breaks close out. The combined energy is moderate (2280), but the wind is onshore, keeping it messy. Not a standout.
Tuesday, August 25th, is a big one. We’re looking at 16ft to 18ft SE swell, but the wind is cranking onshore at 22-25 mph. The energy is very strong (12718-14999), but it’s going to be a lumpy, wind-chopped mess. This is expert-only, and honestly, with those winds, it’s more of a kite-surfing show than a paddle-surfing one.
The best of the near-term window pops up on the morning of Thursday, September 4th. The swell drops to a manageable 5ft from the east, with a 9-second period. The wind goes glassy – light and variable, only 3 mph. The combined energy is moderate (485). That’s clean, glassy conditions on a reef, which is a recipe for some fun, lined-up waves. It’s a real standout for the period, but remember, this is a long-range call, so it’s a bit less certain.
Looking further out, the morning of Tuesday, September 2nd, looks like a beast. Swell is predicted at 23ft from the east, with a very long 14-second period, and the energy is off the charts (17855). The wind is cross-onshore, but the forecast actually says the swell is too big for this break. That’s a massive, dangerous wave. Only for the most experienced, and even then, it’s a maybe.
Overall, the pick of the whole run is that glassy Thursday morning on the 4th of September. It’s the only time the wind and swell truly align for a clean, user-friendly session. The rest of the window is either too small, too windy, or too big.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Warm (max 28°C on Sat morning, min 26°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 87mm), heaviest during Wed night. Warm (max 28°C on Tue morning, min 26°C on Mon night). Winds increasing (moderate winds from the NE on Mon night, near gales from the ESE by Tue night). | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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) | S 9 | SSE 8 | S 8 | S 8 | E 10 | E 11 | SE 12 | SE 20 | SE 17 | SE 16 | SE 16 | SE 16 | SE 15 | SSE 12 | SSE 11 | SSE 9 | SSE 9 | SSE 9 | SSE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 126 | 118 | 86 | 68 | 98 | 119 | 122 | 392 | 2062 | 5891 | 12620 | 14929 | 16291 | 8558 | 4853 | 1888 | 1405 | 1599 | 867 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | cross-on | cross-on | cross-on | on | on | on | cross-on | on | cross-on | cross-on | cross | cross | cross | cross | cross-on |
High Tide | 11:25PM1.69m | 4:05PM1.59m | 1:09AM1.65m | 4:44PM1.70m | 2:48AM1.69m | 5:13PM1.80m | 3:51AM1.79m | 5:40PM1.88m | 4:38AM1.90m | 6:05PM1.95m | 5:17AM2.00m | 6:29PM2.01m | |||||||
Low Tide | 7:47AM0.86m | 8:18PM1.48m | 9:11AM0.77m | 9:49PM1.39m | 10:07AM0.64m | 10:34PM1.27m | 10:49AM0.51m | 11:09PM1.14m | 11:24AM0.40m | 11:39PM1.02m | 11:56AM0.34m | 00:09AM0.90m | |||||||
 |  | |  |  | | | | |  | | |  | | | | | | | |
 | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — |
 | 6:52 | — | 6:51 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
mm | 2 | — | — | — | 2 | — | — | — | — | — | 1 | 4 | 15 | 10 | 12 | 27 | 11 | 7 | 23 |
Temp °C | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 27 |
Feels °C | 32 | 31 | 31 | 32 | 32 | 31 | 31 | 29 | 29 | 29 | 27 | 27 | 27 | 25 | 26 | 25 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | S 9 | SSE 8 | S 8 | S 8 | E 10 | E 11 | E 10 | SE 13 | SE 17 | SE 16 | SE 16 | SE 16 | SE 15 | E 13 | E 13 | E 13 | E 12 | E 12 | SSE 9 |
| kJ | 126 | 118 | 86 | 68 | 98 | 119 | 108 | 273 | 2062 | 5891 | 12620 | 14929 | 16291 | 88 | 121 | 157 | 103 | 100 | 867 |
Swell 2 Height (m) Direction Period (s) | E 7 | E 9 | E 9 | E 9 | S 8 | S 8 | SE 12 | E 10 | SE 12 | E 12 | E 12 | E 15 | E 14 | — | E 19 | E 18 | WSW 10 | E 16 | E 12 |
| kJ | 14 | 25 | 39 | 41 | 46 | 50 | 122 | 96 | 169 | 144 | 98 | 70 | 66 | — | 7 | 6 | 10 | 46 | 69 |
Swell 3 Height (m) Direction Period (s) | E 9 | ESE 11 | ESE 11 | E 14 | SW 9 | SE 13 | SSW 8 | SE 20 | E 10 | — | — | — | — | — | — | E 16 | E 17 | WSW 11 | ENE 15 |
| kJ | 13 | 24 | 40 | 34 | 21 | 45 | 21 | 392 | 49 | — | — | — | — | — | — | 5 | 22 | 11 | 72 |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | — | — | ESE 4 | E 6 | ESE 5 | ESE 5 | ESE 5 | E 6 | NE 9 | — | — | SSE 12 | SSE 11 | SSE 9 | SSE 9 | SSE 9 | — |
| kJ | — | 12 | — | — | 5 | 16 | 20 | 27 | 49 | 94 | 132 | — | — | 8558 | 4853 | 1888 | 1405 | 1599 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 13 | 67 | 33 | 28 | 1 | 33 | 33 | 33 | 33 | 33 | 213 | 371 | 302 | 614 | 342 | 310 | 310 | 297 | 248 |
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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