
Surf Forecasts:
Uchiumi surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 3PM (local time) - 23ft (7.0m), 15s period, ESE swell with onshore winds.
- Most powerful swell: Thursday 6 Aug, 3PM (local time) - 23ft (7.0m), 15s period, ESE swell with 22,191 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 3PM (local time) - 23ft (7.0m), 15s period with ESE swell.
Best Forecast Surf Conditions for Uchiumi this week:
The surf forecast for Uchiumi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 06) at 3PM. The primary swell is predicted to be 7.0m and 15s period with a secondary swell of 5.5m and 16s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Uchiumi in the next 16 days are 7.0m 15s and forecast to arrive on Thursday (Aug 06) at 3PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 6th Aug) | 23ft (7.0m) 15s |
| Best Surf | 3PM (Thu 6th Aug) | 23ft (7.0m) 15s |
| Most Powerful | 3PM (Thu 6th Aug) | 23ft (7.0m) 15s |
Table - best surf conditions forecast for Uchiumi over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s have a look at what’s on the cards for Uchiumi over the next couple of weeks.
Honestly, this is a tough stretch. The forecast is a real mixed bag, and the first ten days or so are pretty much a write-off for paddle surfing. The biggest issue is the wind – strong, cross-onshore, and onshore winds are the story for most of the first week and a half, and when you combine that with some massive, dangerous swell, it’s just not worth paddling out. The first true standout doesn’t come until over a week away, so we’ve got a bit of a wait.
The trouble starts straight away. From Thursday the 6th of August through most of the following week, the swell is just too big for Uchiumi – we’re looking at 12 ft to 23 ft faces with a very long period of 15 seconds. That’s an enormous amount of energy (combined energy of all swells: 12,634 to 37,628), and it’s coming from the ESE. The wind is a strong breeze from the NE and ENE, over 25 mph, making it a cross-onshore or onshore mess. This is for experts only, and the conditions are dangerous. The water temp is a warm 85°F, which is about average for the time of year.
Moving into the weekend, the swell drops to around 10 ft, but the wind is still a fresh breeze from the E (22 mph) and the surf is lumpy and poor. Sunday sees a bit of rain and a shift to a S swell at 5 ft with a 12-second period, but the wind is still cross-onshore and fresh. It’s a poor outlook.
The beginning of the second week (Monday 10th to Wednesday 12th of August) is still marginal. We’ve got small, weak swell (3 ft to 4 ft, combined energy under 700) and persistent cross-onshore winds. The word “marginal” is the best you’ll get, and even that’s generous. It’s choppy and not worth the paddle.
Then, we get a bit of a glimmer. On Thursday the 13th of August, the wind drops to a light breeze, and the swell is around 5 ft to 5 ft from the east with a 10-12 second period. The conditions are still described as marginal, but it’s a step in the right direction. The wind is onshore early and then cross-onshore in the afternoon, so it’s not clean.
Friday the 14th of August is another poor day with a moderate breeze ruining the 5 ft swell.
But here’s the one true standout for the whole period. Saturday morning, the 15th of August. The wind goes glassy – a light, variable breeze from the north at just 3 mph. The swell is a clean 6 ft from the east with a 10-second period, giving a combined energy of 825. The forecast says “expect very good surf conditions.” This is your best shot. It’s the only morning in the entire sixteen days where the wind is totally glassy, offering clean, lined-up waves. Uchiumi is a reef break, so that east swell with a decent period should wrap in nicely. The water temp is still warm, and the drop in wind makes it a real goer. It’s a Saturday, so expect a few locals out, but for the quality on offer, it’s worth it.
After that, the glassy window closes. Sunday the 16th of August brings a moderate onshore breeze and messy conditions. The last few days of the forecast (17th to 21st of August) see a return to onshore and cross-onshore winds, with the swell building back up to 8 ft to 10 ft. The combined energy jumps back up (1,313 to 2,935), but the wind is a moderate breeze, making it choppy and poor. This setup really looks more interesting for kite surfing than for paddle surfing, given the strong onshore winds and the size of the swell.
So, to be blunt: the first 10 days are a write-off. Saturday the 15th of August is your one clear window for a proper surf. After that, it’s back to onshore slop. Stay patient.
Rusty.
Short Range ForecastHeavy rain (total 102mm), heaviest during Sat night. Warm (max 28°C on Thu morning, min 27°C on Thu night). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 81mm), heaviest during Sun morning. Warm (max 28°C on Mon morning, min 26°C on Tue night). Winds decreasing (fresh winds from the E on Sun morning, calm by Tue night). | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
AM | 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) | ESE 15 | ESE 15 | SE 14 | ESE 14 | SE 13 | SSE 13 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | S 12 | E 14 | SE 8 | SE 8 | E 12 | E 12 | SSE 11 | SSE 11 | S 10 | E 11 | E 11 |
Wave Graph | |||||||||||||||||||||
12634 | 22191 | 14641 | 11710 | 4369 | 3399 | 2042 | 1599 | 1342 | 1155 | 736 | 563 | 515 | 444 | 353 | 273 | 373 | 292 | 208 | 311 | 326 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 12:18PM1.56m | 11:14PM1.84m | 2:34PM1.58m | 00:24AM1.79m | 4:09PM1.71m | 1:55AM1.79m | 4:58PM1.85m | 3:13AM1.86m | 5:33PM1.97m | 4:12AM1.96m | 6:03PM2.06m | 5:01AM2.07m | 6:31PM2.13m | ||||||||
Low Tide | 5:04PM1.28m | 6:56AM0.70m | 6:41PM1.44m | 8:23AM0.61m | 8:51PM1.47m | 9:33AM0.47m | 10:08PM1.38m | 10:25AM0.34m | 10:56PM1.27m | 11:09AM0.24m | 11:33PM1.13m | 11:47AM0.18m | 00:07AM1.00m | ||||||||
5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | |
— | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | |
mm | 4 | 6 | 16 | 9 | 5 | 18 | 10 | 9 | 25 | 15 | 13 | 22 | 10 | 9 | 12 | — | — | — | — | — | 2 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 26 | 26 | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 29 | 28 | 28 | 31 | 31 | 32 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | ESE 15 | ESE 16 | SE 14 | SE 14 | SE 13 | SSE 13 | SSE 12 | SSE 12 | S 12 | S 12 | ESE 8 | ESE 8 | E 13 | SE 8 | SE 7 | SE 7 | SSE 11 | SSE 11 | S 10 | E 11 | E 11 |
12634 | 15437 | 13678 | 9900 | 4369 | 3399 | 1454 | 876 | 657 | 615 | 603 | 477 | 488 | 403 | 285 | 139 | 373 | 292 | 208 | 311 | 326 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | ENE 16 | — | ENE 15 | E 15 | E 15 | E 14 | E 14 | S 12 | S 11 | S 11 | E 12 | E 12 | E 12 | E 11 | E 11 | E 10 | SSE 10 | SSE 10 |
— | — | — | 25 | — | 21 | 17 | 17 | 37 | 106 | 736 | 563 | 240 | 444 | 353 | 273 | 242 | 189 | 161 | 167 | 128 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 16 | SE 16 | E 13 | E 14 | S 15 | S 12 | S 11 | S 11 | SE 13 | SE 13 | E 12 | SE 13 | SE 12 |
— | — | — | — | — | — | — | — | 10 | 10 | 284 | 537 | 112 | 327 | 248 | 198 | 7 | 7 | 108 | 6 | 6 | |
Wind waves Height (m) Direction Period (s) | — | ESE 15 | ESE 14 | ESE 14 | ESE 11 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | — | — | SE 8 | E 7 | E 6 | — | — | — | — | — | — |
— | 22191 | 14641 | 11710 | 3755 | 2549 | 2042 | 1599 | 1342 | 1155 | — | — | 515 | 148 | 76 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 363 | 804 | 291 | 804 | 804 | 804 | 701 | 793 | 286 | 286 | 236 | 236 | 701 | 299 | 236 | 205 | 205 | 0 | 46 | 46 | 0 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Uchiumi Surf forecast
The above surf forecast table for Uchiumi provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Uchiumi can be found by selecting the local surf guide option on the grey menu. Our Uchiumi 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 (Uchiumi) 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 Uchiumi 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.
Uchiumi is 19 km (12 miles) from Miyazaki-shi. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Miyazaki-shi. Miyazaki-shi has rooms for a wide range of budgets as well as car hire and transport links.











